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AMC Handbook of Clinical Assessment

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Table of Contents
Foreword — Joanna M Flynn
ix
Preface — Roger J Pepperell
x
Contributors
Editorial Committee
Additional Contributors
xi
Acknowledgements
xvii
Introduction — Vernon C Marshall
1
Role of the Australian Medical Council (AMC) — Ian B Frank
9
Construction, Scoring and Validation of Assessments — Neil S Paget
25
The AMC Multidisciplinary Clinical Assessment Task (MCAT) Format
— Heather G Alexander
31
How to Use this AMC Handbook of Annotated MCATs — Vernon C Marshall
34
MCAT Format Example: Candidate Information and Tasks, Performance
Guidelines
001 A cut to the thumb of a 22-year-old man
37
MCAT Candidate Information and Tasks, MCAT Performance Guidelines;
Five Principal Categories and Domains
44
1 CLINICAL COMMUNICATION (C)
45
• 1-A Communication, Counselling, and Patient Education
— Introduction: Alan T Rose
~ MCAT Candidate Information and Tasks 002-021
~ MCAT Performance Guidelines 002-021
45
DETAILS OF MCAT SCENARIOS
002 Advice on breastfeeding versus bottle-feeding for a 28-year-old
pregnant woman
3
Advice on neonatal circumcision for a couple expecting their first child
4
Suspected hearing impairment in a 10-month-old child
5
Counselling a family after sudden infant death syndrome (SIDS)
6
Hair loss in a 38-year-old man
7
An unusual feeling in the throat in a 30-year-old man
8
Pain in the testis following mumps in a 25-year-old man
9
Contraceptive advice for a 24-year-old woman
10 Rape of a 20-year-old woman
11 Cancer of the colon in a 60-year-old man
12 Thalassaemia minor in a 22-year-old woman
51-67
68-130
CIT
PG
53
69
53
54
55
56
57
58
58
59
60
61
72
75
77
79
81
84
87
90
92
95
i
13
Pre-pregnancy advice to a 28-year-old woman with previous
thromboembolism
CIT
PG
62
99
14
Pre-pregnancy advice to a 24-year-old woman with Type 1
diabetes mellitus
62
102
15
An anencephalic fetus diagnosed at 18 weeks gestation in a
25-year-old primigravida
63
105
16
A duodenal ulcer found on endoscopy in a 65-year-old man
64
108
17
Advice on autologous blood transfusion to a 55-year-old man
awaiting elective surgery
65
111
65
66
67
67
115
121
125
129
18
Advice on stopping smoking to a 30-year-old man
19
Excessive alcohol consumption in a 45-year-old man
20
Type 1 diabetes mellitus in a 9-year-old boy
21
Request for vasectomy from a 36-year-old man
1-B Case presentations and summaries to Examiner
— Introduction: Vernon C Marshall
131
DETAILS OF MCAT SCENARIOS
022-029 Headache, neck lump, previous shoulder dislocation,
dysphagia, low back pain, knee pain, abdominal discomfort, gastric
ulcer with haemorrhage
132-135
2 CLINICAL DIAGNOSIS (D)
137
2-A The Diagnostic Process — History-taking and Problem-Solving
— Introduction: Reuben D Glass
~ MCAT Candidate Information and Tasks 030-043 ~
MCAT Performance Guidelines 030-043
DETAILS OF MCAT SCENARIOS
30
Jaundice in a breastfed infant
31
A convulsion in a 14-month-old boy
32
Loud and disruptive behaviour of a 6-year-old boy
33
Tremor in a 40-year-old man
34
Headache in a 35-year-old woman
35
Lethargy in a 50-year-old woman
36
Syncope in a 52-year-old man
37
A painful penile rash in a 23-year-old man
38
Primary amenorrhoea in an 18-year-old woman
39
A skin lesion on the cheek of a 50-year-old man
40
A pigmented mole on the trunk of a 30-year-old woman
41
An itchy rash on the hands of a 19-year-old woman
42
Red painful dry hands in a 30-year-old bricklayer
43
Swelling of both ankles in a 53-year-old woman
137
142 -154
155 -195
143
144
144
145
145
146
147
148
149
150
151
152
153
154
156
159
161
164
167
170
173
177
180
182
184
186
189
191
ii
CIT
• 2-B Physical Examination
— Introduction: Vernon C Marshall and Barry P McGrath
~ MCAT Candidate Information and Tasks 044-057
218
~ MCAT Performance Guidelines 044-057
DETAILS OF MCAT SCENARIOS
044
Assessment of a comatose patient
045
Recent onset of poor distance vision in a 17-year-old male
046
A painful rash on the trunk of a 45-year-old child-care worker
047
Acute low back pain and sciatica in a 30-year-old man
048
Fever and a recent rash in a 30-year-old man
049
A heart murmur in a 4-year-old boy
050
A knife wound to the wrist of a 25-year-old man
051
Multiple skin lesions in a Queensland family
052
Subcutaneous swelling for assessment
053
Examination of the knee of a patient with recurrent painful
swelling after injury
054
Assessment of hearing loss, first noted during pregnancy in a
35-year-old woman
055
Examination of a 20-year-old woman who dislocated her
shoulder 6 months ago
056
Assessment of a groin lump in a 40-year-old man
057
Eye problems in an aboriginal community
• 2-C Choice and Interpretation of Investigations
— Introduction: Reuben D Glass and Vernon C Marshall
~ MCAT Candidate Information and Tasks 058-064
~ MCAT Performance Guidelines 058-064
DETAILS OF MCAT SCENARIOS
058
Positive test for hepatitis C in a 26-year-old woman
059
Diagnosis of 'brain death' prior to organ donation
060
Breast biopsy concerns in a 20-year-old woman with a family
history of breast cancer
061
An elbow injury in an 11-year-old schoolgirl
062
Sudden onset of chest pain and breathlessness in a
20-year-old woman
063
Atypical ureteric colic in a 25-year-old man
064
Investigation for male factor infertility in a 25-year-old man
234
PG
196
-23
3
-29
6
219
220
221
222
223
224
225
226
228
235
241
246
248
252
255
257
264
274
229
280
230
282
231
232
233
286
289
293
297
312- 319
320- 342
313
314
321
325
315
316
329
331
317
318
319
334
337
340
iii
CIT
2-D The General Consultation
— Introduction: Barry P McGrath
~ MCAT Candidate Information and Tasks 065-073
~ MCAT Performance Guidelines 065-073
DETAILS OF MCAT SCENARIOS
065 Acute chest pain in a 60-year-old man
066 Palpitations and dizziness in a 50-year-old man
067 Muscle weakness and urinary symptoms in a 60-year-old man
068 Aches and pains in a 62-year-old man
069 Lack of energy in a 56-year-old suntanned man
070 Recent haematemesis in a 50-year-old man
071 Anaemia in a 28-year-old pregnant woman
072 Acute vertigo in a 50-year-old man
073 Urinary frequency in a 60-year-old man
2-E The Paediatric Consultation
PG
343
347-354
355-396
348
349
350
351
352
352
353
353
354
356
363
368
371
374
377
380
383
394
397
— Introduction: Peter J Vine
~ MCAT Candidate Information and Tasks 074-077
~ MCAT Performance Guidelines 074-077
401-403
404-416
DETAILS OF MCAT SCENARIOS
74
Neonatal jaundice in the first day of life
402
405
75
Immunisation advice to the parent of a 6-week-old baby
402
408
76
Dark urine, facial swelling and irritability in a 5-year-old boy
403
412
77
Fever and sore throat in a 5-year-old boy
403
414
2-F The Obstetric and Gynaecologic Consultation
— Introduction: Roger J Pepperell
~ MCAT Candidate Information and Tasks 078-082
— MCAT Performance Guidelines 078-082
417
419-422
423-435
DETAILS OF MCAT SCENARIOS
78
Breech presentation in labour at 38 weeks in a 25-year-old woman
79
Vaginal bleeding in a 23-year-old woman
420
427
80
Cessation of periods in a 30-year-old woman on the oral
contraceptive pill (OCP)
421
430
421
432
422
434
081 Positive culture for Group B streptococci (GBS) at 36 weeks of
gestation in a 26-year-old woman
082 Vaginal bleeding after 8 weeks amenorrhoea, in a woman with
previous irregular cycles
2-G The Psychiatric Consultation
— Introduction: Frank P Hume
~ MCAT Candidate Information and Tasks 083-089
~ MCAT Performance Guidelines 083-089
iv
420
424
436
446-454
455-481
CIT
Pfi
schizophrenia
084 Demand for urgent treatment for 'sudden hair loss' from a
447
456
29-year-old man
085 Poor work performance in a 30-year-old female police officer
086 Lifestyle stress in a 45-year-old man
087 Binge drinking in a 25-year-old man
088 Nausea, headache and feeling 'jittery' in a 30-year-old bank clerk
089 Collapse of a 30-year-old woman on the way to a court attendance
448
449
450
452
453
454
459
463
466
470
474
478
483
DETAILS OF MCAT SCENARIOS
083 Medication changes for a 35-year-old woman with chronic
3 CLINICAL MANAGEMENT (M)
• 3-A Management Objectives, Therapeutics, Prevention and Public Health
— Introduction: Alan T Rose, Michael R Kidd and Ronald McCoy
~ MCAT Candidate Information and Tasks 090-100
~ MCAT Performance Guidelines 090-100
DETAILS OF MCAT SCENARIOS
483
489499-
-498
-536
090 Acute right sided pain and haematuria in a 25-year-old man
091 Faecal soiling in a 5-year-old boy
092 Psoriasis in a 30-year-old man
093 Temporal arteritis in a 58-year-old woman
094 Acute idiopathic facial nerve palsy ('Bell Palsy') in a
490
491
492
493
500
503
507
510
40-year-old man
095 Dysuria and urinary frequency in a 40-year-old man
096 Eclampsia in a 22-year-old primigravida at 38 weeks of gestation
097 An abnormal glucose tolerance test (GTT) in a 34-year-old
494
495
496
512
519
522
primigravida
098 Bed-wetting by a 5-year-old boy
099 Acute gout in a 48-year-old man
100 Request for repeat benzodiazepine prescription from a
496
497
497
525
528
531
25-year-old man
• 3-B Clinical Procedures
498
534
537
543548-
-547
-563
101 Resuscitation of a 24-year-old man after head and chest injury
102 Fluid balance assessment in a 50-year-old patient after
544
549
abdominal surgery
103 Evaluation of lung function by spirometry in a 22-year-old man
104 A suspected fractured clavicle in a 20-year-old man
545
546
547
551
558
561
— Introduction: Peter G Devitt and Barry P McGrath
~ MCAT Candidate Information and Tasks 101-104
~ MCAT Performance Guidelines 101-104
DETAILS OF MCAT SCENARIOS
V
CIT
PG
INTEGRATED DIAGNOSIS AND MANAGEMENT (D/M)
565
4-A Clinical Perspective and Priorities
565
— Introduction: Bryan W Yeo
~ MCAT Candidate Information and Tasks 105-112
~ MCAT Performance Guidelines 105-112
DETAILS OF MCAT SCENARIOS
570
578
-577
-600
105 Abdominal pain and vaginal bleeding after 9 weeks amenorrhoea,
in a 39-year-old woman
106 Recent insomnia in a 25-year-old man
107 Dandruff or head lice in a 6-year-old girl?
108 Recent orchidectomy for a testicular neoplasm in a
571
572
573
579
582
585
28-year-old man
109 Postnatal fatigue and exhaustion in a 28-year-old woman
110 Fundus greater than dates in a 26-year-old woman at
574
575
587
589
30 weeks gestation
111 Tiredness and anaemia in a 55-year-old woman
112 Colonoscopy findings in a 24-year-old man with chronic diarrhoea
4-B Life-threatening Emergencies — Priorities of Treatment
575
576
577
593
596
599
601
— Introduction: Bryan W Yeo
~ MCAT Candidate Information and Tasks 113-118
~ MCAT Performance Guidelines 113-118
DETAILS OF MCAT SCENARIOS
113 A severely ill 4-month-old baby girl with fever
114 A lethargic febrile 2-year-old boy with a rash
115 Wheezing and breathing difficulty in a 5-year-old girl
116 Cuts to the wrist of a 25-year-old man
117 Severe postpartum haemorrhage in a 25-year-old primigravida
118 Emergency management of a snake-bite in a 20-year-old man
602- 608
609- 627
603
604
605
606
607
608
LEGAL, ETHICAL AND ORGANISATIONAL (LEO)
610
612
614
618
622
625
628
5-A Ethical and Legal Dilemmas
629
— Introduction: Kerry J Breen
~ MCAT Candidate Information and TasKS 119-124
~ MCAT Performance Guidelines 119-124
DETAILS OF MCAT SCENARIOS
633640-
639
659
119 A man requesting disclosure of his wife's medical condition
120 Obtaining consent for leg amputation in a 35-year-old man after
634
641
a motor vehicle injury
121 Several bone fractures in a 9-week-old baby
635
636
644
647
VI
CIT
PG
637
649
638
652
639
MCAT TRIAL EXAMINATIONS
655
661
• Preparatory Instructions
661
122 A parent requesting sterilisation of her intellectually disabled
daughter
123 Blood transfusion consent for a 33-year-old pregnant woman
with severe APH at 7 months
124 End-of-life request from a terminally ill patient
— Roger J Pepperell
16 Station Trial Assessment
~ MCAT Candidate Information and Tasks T1-T16
~ MCAT Performance Guidelines T1-T16
DETAILS OF MCAT TRIAL ASSESSMENTS
125
126
127
128
129
130
131
132
133
[T1]
[T2]
[T3]
[T4]
[T5]
[T6]
[T7]
[T8]
[T9]
664 -678
679 -730
Meconium staining of liquor in labour in a 25-year-old
primigravida
665
680
A heart murmur in a 5-year-old girl
Vigorous vomiting by a 3-week-old boy
Urinary incontinence in a 50-year-old woman
Migraine in a 30-year-old woman
Past history of hip dislocation in a 35-year-old man
Tiredness in a 45-year-old man
Review of lung function tests in a 65-year-old man with
666
667
668
668
669
670
683
685
688
691
694
696
shortness of breath
671
700
Assessment of a 28-year-old primigravida at 34 weeks
with fundus less than dates
672
705
Delirium in a 25-year-old man after a burn injury
Chronic diarrhoea in a 45-year-old man
Fever, irritability and ear discharge in a 2-year-old boy
Review of cytology after aspiration of a breast lesion in a
672
673
674
708
712
716
134
135
136
137
[T10]
[T11]
[T12]
[T13]
138
139
140
[T14] Nocturnal hand discomfort in a 35-year-old schoolteacher
[T15] An attack of asthma in a 25-year-old man
[T16] Preparing a 30-year-old woman with suspected acute
28-year-old woman
appendicitis for surgery
675
718
677
677
721
724
678
728
8 Station Trial Retest Assessment
~ MCAT Candidate Information and Tasks R1-R8
~ MCAT Performance Guidelines R1-R8
DETAILS OF MCAT TRIAL RETEST ASSESSMENTS
141
142
143
[R1]
[R2]
[R3]
Intravenous cannula insertion for antibiotic prophylaxis
Heartburn in a 35-year-old man
Spontaneous bruising and nosebleed in a 3-year-old boy
732
740
-739
-765
733
734
735
741
744
748
Vii
CIT
PG
144 [R4] Nausea and vomiting in the first trimester in a 25-year-old
primigravida
145 [R5] Visual difficulties in a 50-year-old man
146 [R6] Cognitive state assessment of a 50-year-old barman
147 [R7] Jaundice in a 25-year-old man
148 [R8] Assessment of prominent leg veins in a 38-year-old woman
INTERACTIVE CLINICAL ASSESSMENT — OTHER METHODS AND OSCE
MODIFICATIONS
— Peter G Devitt and Heather G Alexander
736
750
736
737
738
739
753
756
760
763
767
149 Confusion and delirium after surgery in a 50-year-old man
150 Postoperative fever in a 45-year-old woman
151 The 4 station progressive OSCE
771
771
773
GLOSSARY OF TERMS AND ABBREVIATIONS
776
779
781
EPONYMS
790
APPENDICES
1. AMC Objectives of Medical Education
803
2. AMC Instructions to Standardised Patients and Clinical Examiners
3. MCC/AMC Clinical Task Categories; AMC Function/Process;
806
810
System/Region/Speciality; and Discipline classification
MCATs with full Domain listing and AMC Anthology Reference
814
MCATs by Discipline (Condition and page listings only)
843
MCATs by System/Region/Speciality (Condition and page listings only)
847
MCATs by Function/Process (Condition and page listings only)
856
Suggested Additional Groupings of MCATs for self-test trial assessments
862
Guidelines for further reading
863
EPILOGUE
867
INDEX
868
Viii
The AMC Multidisciplinary Clinical
Assessment Task (MCAT) Format
Heather G Alexander
The student is to collect and evaluate facts. The facts are locked up in the patient. To
the patient, therefore, the student must go.'
Abraham Flexner (1866-1959)
Medical Education, a Comparative Study
The MCAT is an integrated OSCE-style clinical examination where each candidate
proceeds through the same number of stations — 16 stations in the full exam, 8 stations in
the retest.
CONTENT OF STATIONS
At each station, two minutes are allocated for preliminary reading outside the room. An
instruction sheet giving the candidate specific information and tasks required is provided.
This introduces the candidate to the consultation setting and clinical situation. It may also
include patient profile test results or an illustration. Specific tasks that the candidate will be
asked to perform are itemised. A duplicate copy of the instructions is provided in the
examination room.
This is followed by eight minutes performing the required task in a room The aims of the
with a standardised patient. When the candidate first enters the room, the station, the tasks
observing examiner will check that the instructions for the station have that candidates are
been read and will then introduce the candidate to the patient. The asked to perform,
examiner will then observe the performance and record the the key issues and
candidate's performance on a tailored mark sheet. The standardised assessment
patient may be a real patient or a simulated patient (role player) who domains defined
plays the role of either the patient or a relative. Doctor-patient for the station are
communication performance contributes to the assessment and requires all closely aligned.
a well-trained role player. Where scenarios are based on physical
examination, the 'role player' may be a real patient.
FIGUREIII.
History-taking
FIGURE iv.
Commencing the Physical Examination
The aims of the station, the tasks that candidates are asked to perform, the key issues
and assessment domains defined for the station are all closely aligned.
031
The MCAT scenarios developed for assessment purposes are designed to simulate closely real
life situations within medical consultations. These may be in a general practice setting, a hospital
emergency department, or a hospital inpatient or outpatient setting. Scenarios deal with different
phases of illnesses. Diagnostic scenarios include the diagnostic phases of history taking, physical
examination, and ordering and interpreting investigations. The management phases incorporate
patient explanation and education, advice and referral, therapeutics and preventive medicine,
clinical procedures and counselling. Scenarios are focused precisely so that the assessment
domains, key issues and critical errors are accurately related to the station aims and the tasks set
down in the candidate's instructions.
Members of the AMC clinical examination panel suggest MCAT clinical scenarios based on their
prevalence, seriousness, preventability and whether they can be simulated as real life situations
within the inherent time constraints. Scenarios are thoroughly reviewed and approved by the
multidisciplinary clinical panel prior to use. The current 16 or 8 station MCAT formats cover a
broad spectrum of skills in clinical medicine, psychiatry, surgery, obstetrics/gynaecology, and
paediatrics, including emergency, hospital and community practice medicine.
MCAT MARKING
In an MCAT, candidates are assessed at the level of a final year medical student, i.e. a doctor
about to commence an intern year (PGY1).
Mark sheets for examiner use.
The examiner scores the candidate's performance on a mark sheet which specifies the
assessment domains, key domains, and critical errors if appropriate. The assessment domains
match the tasks outlined on the instructions the candidates receive during the two minutes
preliminary reading.
The marking domains are identified from among a total of 14 covering:
• approach to patient and responses to patient's questions;
• patient counselling and education;
• history-taking;
• physical examination choice and technique;
• physical examination accuracy;
• choice of investigations;
• interpretation of investigations;
• diagnosis and differential diagnosis;
• initial management plan;
• explanation of clinical procedure;
• performance of clinical procedure;
• familiarity with test equipment;
• commentary to examiner; and
• answers to examiner's questions,
No single station is likely to have assessment in more than five of these domains.
Each domain has a 4-point marking scale:
• Very satisfactory
Clear pass
• Satisfactory
Pass
• Unsatisfactory
Fail
• Very unsatisfactory
Clear fail
032
An example mark sheet is included later with the example MCAT 001. (see page 44)
Critical errors are defined and derived from one or more of the key issues, when relevant. Not
all stations have critical errors. If the candidate makes a critical error the candidate is very likely to
fail that station, regardless of performance in other domains, unless performance in other
domains is outstanding and the critical error is deemed possibly related to lack of time or
misunderstanding of the task. MCAT performance is checked and reviewed by the Clinical Panel
of Examiners after each use in an examination. All details, particularly presence and definition of
critical errors, are reassessed and retained or modified in light of candidate performance and
examiner feedback.
Station failure would probably result from two or more 'unsatisfactory — fail' assessments or one
'very unsatisfactory — fail' assessment in a key issue domain, or from making a critical error in a
key issue domain.
After scoring each of the domains, the examiner will provide an overall (final) rating that is either
'Pass' or 'Fail' for each station.
All 16 MCAT scenarios are of equal weighting and for each scenario there are only two outcomes
— pass or fail. Candidates must obtain a pass in 12 or more of the 16 stations, including a pass in
at least one paediatric and one obstetric/gynaecology station, to pass the MCAT as a whole.
Candidates scoring pass levels in nine or less of the 16 stations, or with failures in all three of the
paediatric or obstetric/gynaecology stations, fail the examination and must resit.
Candidates who pass 10 or 11 of the 16 stations (including a pass in at least one obstetric/
gynaecology station and one paediatric station) will be eligible for a pass/fail Retest Examination
of 8 stations. Retest candidates will be required to pass six or more of the eight retest stations to
pass the examination. Candidates scoring five or less passes will fail and be required to resit the
whole examination.
Heather G Alexander
July 2007
033
How to use this AMC Handbook of
Annotated MCATs
Vernon C Marshall
'In what may be called the natural method of teaching the student begins with the
patient, continues with the patient, and ends his studies with the patient, using books
and lectures as tools, as means to an end.'
Sir William Osier (1849-1919)
The MCAT self-test scenarios are arranged in groups under the principal categories and
domains tested. In each instance the reader is provided with a synopsis heading, outlining
the clinical problem/condition together with the information available to the candidate and
details of the task to be undertaken, exactly as this appears in the MCAT examination.
INSTRUCTIONS TO CANDIDATES
You may wish to attempt to complete the tasks in each of the major categories before
moving to the next group. If you would prefer to review tasks by system and region, or by
discipline, the appropriate groupings of these are listed in later pages. Page numbers of
individual MCATs are listed in the table of contents at the beginning of the book for easy
reference.
After reading carefully the information provided to you for each clinical scenario and the
required tasks, jot down how you will approach this consultation, how you will advise the
patient or relative of your findings and recommendations, and how you would structure
responses to queries from patient or examiner. Then turn the pages to check your
responses against the optimum Performance Guidelines, Examiner Instructions and
Commentaries. Note the station Aims, Key issues and Critical Errors outlined.
In this book the scenarios are grouped into five main categories. The groupings are to some
degree artificial in that communication skills are relevant to all scenarios. For example,
aspects of diagnosis, management, and patient counselling and education are frequently
combined to varying degree, but the groupings are arranged to emphasise and categorise
the principal domains even though most scenarios are assessed over multiple domains.
The five groupings below condense the total of 14 domain assessments into five categories
covering skills principally in:
1. Clinical Communication (C) — with patient, relative and observer, and including a
number of domains: approach to patient, patient counselling/education, history-taking,
commentary to examiner, answers to patient's or examiner's questions, explanation of
procedure, case presentation and summary.
2. Clinical Diagnosis (D) — includes history-taking, technique and accuracy of physical
examination, choice of investigations and their interpretation, diagnosis/differential
diagnosis.
3. Clinical Management (M) — includes initial management plan, performance of
procedure/task, treatment and prevention of disease, clinical procedures.
4. Integrated Diagnosis and Management (D/M) — includes clinical perspectives and
priorities, life-threatening emergencies, integrative reasoning skills and clinical
problem-solving.
5. Legal, Ethical and Organisational (LEO) — includes scenarios where ethical and legal
issues are significant.
034
INTRODUCTORY GUIDELINES for candidates (see Table below)
The MCAT self-test
are provided at the start of each of the main categories and their
scenarios are arranged
domains.
in groups under the
After completing individual case scenarios you may find it helpful to principal categories
revise your knowledge of similar and linked conditions by referring and domains tested. In
to appropriate clinical texts and references. The AMC Anthology of each instance the
Medical Conditions contains other self-test strategies for individual reader is provided with
conditions.
a synopsis heading,
Try making up your own variations on the conditions tested, and outlining the clinical
practise role playing and interactions with a colleague or in a group. problem/condition
Once you are familiar with the mechanics and time constraints, together with the
pace yourself through the trial examinations (one containing 16 information available to
stations and one containing 8 multi-disciplinary stations), and the the candidate and
other suggested groupings provided later in the book, under details of the task to be
undertaken, exactly as
simulated examination conditions.
this appears in the
The Editorial Committee hopes you find the examples helpful and MCAT examination.
extends its good wishes for a successful assessment.
SCENARIO HEADINGS FOLLOWED IN THE AMC HANDBOOK OF CLINICAL
ASSESSMENT
The MCAT scenarios and performance guidelines are set out in a standardised sequence as
follows. Groups of self-test candidate information and tasks are arranged under principal
categories and domains tested.
Table 3 MCAT Introductory Guideline Scenario Headings
CONDITION
AND ID
NUMBER
A generic and non-diagnostic summary of the presenting symptom,
physical sign or investigation result in diagnostic-type cases, such as:
•
Assessment of acute abdominal pain in a 30-year-old woman.
•
Assessment of a vesicular rash in a 50-year-old man.
•
Review of liver function test results in a 50-year-old man with
jaundice.
The diagnosis or most likely diagnosis in management/counselling-type
cases, such as:
•
Management of shingles ('herpes zoster') in a 25-year-old
woman.
•
Counselling the relative of a patient after recent major surgery.
CANDIDATE
INFORMATIO
N AND
TASKS
Under this heading the background information and tasks are given
precisely as they appear in the MCAT examination.
Page references to the matching Performance Guidelines are given at
the foot of each Candidate Information and Tasks sheet.
YOURTASKS ARE TO:
Lists requested tasks for candidates.
035
Performance guidelines follow in similar category and domain groups linked to the preceding scenarios by ID
number and page reference.
PERFORMANCE GUIDELINES
CONDITION AND
ID NUMBER
Principal category and assessment domains in detail; and
classitication by function, system/region and discipline (see
Appendix 3) are listed for each station just prior to the index.
AMC Anthology of Medical Conditions reference is listed to aid further self-testing. The MCC/AMC
Clinical Task Category is also listed.
AIMS OF STATION
A brief outline of station and assessment aims, matching the tasks. The
expected responses and levels of performance required to complete the
tasks successfully are outlined in the examiner instructions and
commentaries.
EXAMINER
INSTRUCTIONS
These provide the following:
Instructions from examiner to standardised patient
Candidate information and tasks and role player instructions are detailed
and provided to examiners and standardised patients so that there is
standardised behaviour across multiple patients. Cues assist in directing the
consultation pathway. The instructions are set out using lay terminology to
maintain realism, and outline:
• Clinical setting — hospital emergency department, hospital ward
or outpatient department, primary care facility, community practice
office consultation.
• Clinical situation — description of illness and symptoms and
phase of the consultation.
• Patient profile — age and gender, past history, family history,
habitus, as relevant to the case.
• Opening statement — one sentence provided as the patient's
opening gambit.
• How to play the role — advice on further responses, posture,
gestures, affect, mood and ways to react to the doctor, including
where the task is a physical examination.
Questions to be asked by patient/role player — set down in a loose
priority and which will depend on whether these have already been covered
by the doctor/candidate. Any examiner questions or prompts to the
candidate are also outlined, with the required responses.
EXPECTATIONS
OF CANDIDATE
PERFORMANCE
These are clarified for the examiner and match the tasks and the
domains.
KEY ISSUES
These are selected from the assessment domains and expectations of
candidate performance for each case and highlighted accordingly.
CRITICAL ERROR(S)
These list significant errors likely to lead to a fail performance.
COMMENTARY
This discusses and comments further on the condition, highlighting
performance standards and common errors.
036
EXAMPLE CASE SCENARIO:
The following case scenario exemplifies the formatting for a combined Diagnosis and
Management MCAT.
MCAT FORMAT EXAMPLE:
Sample - Condition 001
Candidate Information and Tasks
Condition 001
A cut to the thumb of a 22-year-old man
You are the Hospital Medical Officer (HMO) in a hospital Emergency Department.
The patient injured his left thumb at work an hour ago. He is aged 22 years and works
as an orchard labourer and fruit picker. He is right handed. He was pruning fruit trees
today and the pruning knife slipped and he cut his left thumb. He was wearing cotton
gloves. The knife cut through the glove and cut the thumb as shown in the illustration
below. Bleeding was minor and controlled by a pressure dressing, which has been
removed for examination.
The wound appears as a linear knife cut as shown, the edges of which have sealed
after the initial bleeding which has now stopped.
YOUR TASKS ARE TO:
• Examine him and assess the injury.
• Explain to him the nature of the injury and your recommended management.
You may ask other questions of the patient as you proceed with the examination and
explanation.
Near the end of the eight-minute time allotted for your task, the examiner will ask
you one or two questions.
CONDITION 001. FIGURE 1.
Knife wound to the left thumb
The Performance Guidelines for Condition 001 can be found on page 40
037
Sample-Condition 001
Candidate Information and Tasks
CANDIDATE ADVICE
You should:
Prepare and document your responses and how you would approach this task. Test
yourself thoroughly after reading the MCAT Candidate Information and Tasks, before
proceeding to read the performance guidelines, examiner and patient instructions and
commentary which you will find on subsequent pages.
Follow a similar process for the other MCATs. The best way to develop proficiency in an
MCAT assessment is to work in pairs or as a group. Your colleague reads the performance
guidelines and plays the patient/relative, while you read the candidate information and
perform the tasks, while another group member takes the role of examiner/observer.
SUMMARY OF STUDY TASKS
Read the candidate information and task(s), preferably working with a colleague or
group.
Formulate and document a logical approach for responding to and solving the consultative
problem given.
Then read the performance guidelines that follow, and note the aims of the station,
expectations of your knowledge and performance, key issues and critical errors
and other points raised in the commentary. Check for any deficiencies in your performance.
Reread the introductions to the section in which the MCAT appears.
For this MCAT about a thumb wound, revise your knowledge of applied surface anatomy
relevant to wounds giving risk to underlying structures and how you should check for local
and distal effects of injury. Construct alternative scenarios for other wounds and self-test
yourself on these (for example, injuries to radial nerve in the arm, common peroneal nerve
in the leg). Revise the Anthology scenarios 113, 113H, 113J and 113K and complete the
self-test exercises.
Reinforce your understanding of the condition by completing other self-assessment tasks
(for example from the AMC Anthology of Medical Conditions) and construct at least one
other related task for solving.
Finally, one complete MCAT 16 station assessment and one complete MCAT eight station
assessment are provided later in the book as examples of whole examinations for trial.
038
Sample-Condition 001
Candidate Information and Tasks
Additional groupings of MCATs into further self-test trial examinations are also suggested at
the end of the book. MCATs are also grouped into one of the principal disciplines of
medicine, obstetrics/gynaecology, paediatrics, psychiatry, surgery if you wish to use the
book in this way. MCATs are similarly grouped into the relevant function and process and
into system/region/specialty. For these latter groups, MCATs are often listed more than
once when they cover more than one system or function.
Pace and test yourself through these.
Keep practising within a group of your peers until fully familiar with the routine. We hope
that you will find the self-discipline and requirements to adhere to logical clinical reasoning
pathways in approaching the wide range of clinical problems selected for this book will
stand you in good stead, not just for assessment examinations, but throughout your
subsequent career.
Vernon C Marshall
039
Sample - Condition 001
MCAT FORMAT
EXAMPLE:
Performance Guidelines
Condition 001
A cut to the thumb of a 22-year-old man
AIMS OF STATION
To assess the candidate's ability to use clinical reasoning skills to diagnose and
manage important injuries associated with skin wounds. In this instance, the knife cut
has severed the two extensor tendons to the thumb.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
The examiner will draw the linear cut with a red marking pen on the role-playing
patient, and show the patient how to respond to requests to bend his thumb and
testing of sensation as follows:
• You have not yet noticed and should not volunteer any information about limitation
of thumb movement, until specifically asked to extend each of the two end joints,
which you are unable to do. Sensation is normal.
• You had a tetanus booster shot about a year ago for a leg graze and were
immunised against tetanus as a child.
Opening statement:
• 'Will it be okay for me to go back to work tomorrow with a dressing over it now it's
stopped bleeding, Doc?'
Other questions to ask:
• If the candidate/doctor diagnoses tendon injury with normal sensation, you will
accept the recommendations for operation, and should ask about the operation
'Will I need an anaesthetic?'
(Appropriate answer — Yes: regional block or general anaesthesia).
• If no mention of a tetanus prophylaxis or antibiotics is made during the interview
you will subsequently ask
'Will I need another tetanus shot?'
(A booster dose of toxoid would be appropriate).
Examiner's questions to candidate:
• At the end of 6-7 minutes, if the candidate has identified that a tendon injury has
occurred, the examiner should ask:
'What are the names of the injured tendons?'
(Extensor pollicis longus [EPL] and extensor pollicis brevis [EPB])
and
040
Sample - Condition 001
Performance Guidelines
'Which joint does each tendon act upon?'
(Interphalangeal [IP] and metacarpophalangeal [MP] joint respectively).
If no tendon injury has been identified just ask:
'If antibiotics are to be given, what would you choose?'
(Broad spectrum cover such as one dose of amoxycillin, cephalosporin or other
antibiotic).
EXPECTATIONS OF CANDIDATE PERFORMANCE
Cuts and stabs of various types commonly present to emergency departments.
Attending doctors must be aware of the anatomy of deeper structures at risk from
injuries at specific sites and the methods of diagnosing such injuries.
Diagnosis of injury to the two main long thumb tendons and recognition of the
treatment requirements for primary surgical repair in this 'tidy' (clean contaminated)
wound.
Explanation of treatment would optimally advise preparation for early surgery
using local (field) block or general anaesthesia.
Antibiotic and tetanus prophylaxis would be appropriate.
KEY ISSUES
Ability to identify deeper tendon injuries resulting from stabs or cuts.
Failure to appreciate that the whole thumb extensor mechanism (involving two
tendons) has been damaged would comprise a fail (unsatisfactory) in the domains
of examination technique and diagnosis.
Failure to name the tendons correctly would not necessarily be a fail performance,
providing the presence of tendon injury was diagnosed and appropriate advice
given in other areas. Failure to mention antibiotic or tetanus prophylaxis would
be unsatisfactory, but would not be considered a critical error in the presence of
a 'tidy' recent wound; such omission would most likely be corrected with
subsequent specialist referral for surgery and anaesthesia.
CRITICAL ERROR
Failure to test and identify the injury to the extensor tendons would comprise a clear
and irremediable fail for this station at a very unsatisfactory level.
041
Sample - Condition 001
Performance Guidelines
COMMENTARY
The knife cut has severed the two extensor tendons to the left thumb {extensor pollicis
brew's and extensor pollicis longus, from radial to ulnar side). These tendons form the
margins of the anatomical snuff box as illustrated. The tendons have been severed at
the knuckle level of the metacarpophalangeal joint. The patient has no obvious thumb
deformity but is unable actively to extend either the metacarpophalangeal (MP) joint or
the interphalangeal (IP) joint of the thumb. The digital cutaneous nerves have not
been cut and distal sensation is normal apart from tenderness around the cut.
Extension of the joints of the thumb occurs from the actions of:
• Extensor pollicis longus (EPL) the ulnar-sided of the two thumb tendons running
on the dorsal aspect of the thumb. The long tendon of EPL runs obliquely across
the back of the hand after angulating around the tubercle of the radius (Lister
tubercle) before inserting into the base of the distal phalanx. EPL is the prime
mover and sole extensor of the terminal (interphalangeal) joint. By passing across
the metacarpophalangeal (MP) and carpometacarpal (CM) joints of the thumb.
EPL can also act as an accessory extensor of these joints. EPL, like other
superficial tendons, may be injured by cuts and penetrating injuries.
• Extensor pollicis brevis (EPB) is the lateral of the two thumb extensors. EPB runs
in the same synovial sheath as the tendon of abductor pollicis longus on the lateral
surface of the radius and continues over the dorsal shaft of the metacarpal to
insert into the base of the proximal phalanx. EPB is the prime mover in extension of
the MP joint and an accessory extensor of the CM joint. Cuts around the knuckle of
the metacarpophalangeal joint are likely to sever one or both tendons. In this
patient, both EPL and EPB have been severed.
• Abductor pollicis longus (APL). This stout tendon, often multiple or ridged like a
stalk of celery, inserts dorsolateral^ into the base of the thumb metacarpal. APL is
the prime mover of radial abduction and extension of the thumb at the carpometacarpal joint, separating the thumb from the other digits in the plane of the palm.
In this patient, radial abduction will be unaffected as APL has not been injured.
042
Sample - Condition 001
Performance Guidelines
CONDITION 001. FIGURE 2.
Normal Anatomy — Left hand and thumb
The Examiner mark sheet for MCAT 001 follows.
043
Candidate ID card sighted
Very Satisfactory - PASS
Satisfactory - PASS
*-■ KEY ISSUE
Covers all essential
Minor technical
Choice & Technique of Examination,
Organisation and Sequence
Did the candidate carry out an
appropriate focused and relevant
examination as per examiner
instructions?
aspects competently
- minimal errors or
omissions.
•-■ KEY ISSUE
Identified most or
Accuracy of Examination
Did the candidate identify the
physical findings accurately as
per examiner instructions?
all findings
accurately.
•^ KEY ISSUE
Covered all essential
Diagnosis/Differential Diagnosis
Did the candidate formulate and
describe an appropriate diagnosis/
differential diagnosis as per examiner
instructions?
aspects competently
- minimal or no errors or
omissions. Logical, clear,
well organised.
•-. KEY ISSUE
Covered all essential
Initial Management Plan
Did the candidate formulate and
describe an appropriate initial
management plan as per examiner
instructions?
aspects competently
- minimal errors or
omissions. Optimal
management plan.
Answers to Questions
Covered all aspects
Answers to questions asked by
examiner?
completely, minimal
errors or omissions.
OVERALL RATING FOR THIS CANDIDATE FOR THIS STATION:
□
□
□
□
□
faults but
examination
completed reasonably.
□
□
Minor errors in
findings.
□
Minor omissions
or errors in
explanations of findings.
Diagnosis and differential
diagnosis appropriate to
the case even if not
completely accurate.
Minor errors but did
not interfere with an
adequate initial
management plan.
□
Minor errors in
answers to
questions.
PASS
□
Unsatisfactory - FAIL
Very Unsatisfactory - FAIL
Candidate displays
Serious errors or omissions in
technique.
one or more of the
following:
- significant omissions
- significant errors of
technique
- poor technique
One or more
significant errors in
findings.
Significant errors in
CRITICAL ERROR?
Significant errors
X
3-i
<T CD
3
A
(1
□
□
explanations of
findings. Wrong
interpretations of findings.
Unclear and poorly
organised. Diagnosis
inappropriate to the ;ase.
which did interfere
with an adequate
management plan.
T
U)
□
i1
^+
n
1 A
1
II X—
o
[11
Serious errors or omissions in
findings: reported findings not
consistent with physical signs
CRITICAL ERROR?
Diagnosis not given. Serious
omissions or errors in
interpretations of findings.
Clinical reasoning and diagnostic
skills markedly deficient. Very poor
organisation. Wrong diagnosis could
result in serious harm to the patient.
CRITICAL ERROR?
Serious errors or omissions.
Inappropriate management
and/or management proposed is
potentially harmful to patient.
CRITICAL ERROR?
Significant errors in
Serious errors or omissions in
answers to questions
indicating lack of
in
knowledge/expertise
these areas.
the answers given, or complete
unfamiliarity with the subjects asked.
rr
nX
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cp
o
Tl
n
§
1
O
n
—i
in
O
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GO
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CRITICAL ERROR?
FAIL
044
Clinical Communication (C)
1-A: Communication, Counselling &
Patient Education
Alan T Rose
'Oh, that's your doctor, is it? What sort of a doctor is he?'
Well, I don't know much about his ability, but he's got a very good bedside manner!'
George du Maurier, Punch Cartoon, 15 March 1884.
1-A COMMUNICATION, COUNSELLING AND PATIENT EDUCATION
Communication is the exchange of messages and thoughts by speech, signals or writing.
Communication skills are employed to ensure that exchanges are readily and clearly
understood. Exchanges involve the sharing of information, ideas, emotions, and empathy.
Communication is the foundation on which medical consulting takes shape, supplemented
by the practitioner's skill in physical examination and diagnostic reasoning. Failure of
communication is an important contributor to clinical situations of perceived malpractice
and is the most important factor in a high proportion of medicolegal actions.
Most medical consultations and activities require the doctor and
patient to communicate rationally and effectively with each other.The AMC examination
Exceptions are when the patient is an infant or is intellectually process places
handicapped — communication is then with a relative or carer — considerable emphasis
or when the patient is unconscious (including when on assessment of
anaesthetised) or suffering from certain psychotic states, or effective communication
when doctor and patient do not share the same language. between candidate and
Communication requires special techniques with patients who patient during clinical
are blind, mute, aphonic or aphasic. Impaired hearing may consultations, during
affect either patient or doctor. The role of the interpreter, when discussions with
required, is also critical. Involvement of third parties (such as relatives, and during
relatives, friends, or outside agencies) requires the patient's case presentations and
consent. In these situations the patient's legal right to commentaries.
confidentiality and privacy must be respected.
The AMC examination process places considerable emphasis on assessment of effective
communication between candidate and patient during clinical consultations, during
discussions with relatives, and during case presentations and commentaries. Written
communications are important for letters of referral and discharge summaries, but are less
readily assessed within the current AMC format.
Verbal communication depends on a mutual understanding of the language being used
and the way it is articulated. This includes pronunciation, auditory level, speed, tone and
the unique voice qualities and cadences of the speaker. The AMC examination assesses
communication in the English language in a medical and clinical context. English is not the
first language for many IMGs, but all IMGs are required to have adequate clinical communication skills in English by medical registration boards.
045
Nonverbal communication (such as facial expression, posture, gesturing, silence, and
emoting) by either doctor or patient, also conveys messages as well as influencing the
understanding of what is being said and its emotional context.
Effective verbal and nonverbal communication in medical practice facilitates the establishment of empathy and rapport, trust and confidence, mutual understanding, education about
the clinical condition, and satisfactory compliance with advice and treatment.
The term 'bedside manner', used to describe a doctor's communication skills, was first
used in a London 'Punch' cartoon by George du Maurier.
Wide variations in clinical communication skills occur because of each individual doctor's
inherent personality traits and individual approach to patients. These can be modified and
improved by education and self awareness, so that time is saved and any frustrations felt
by the doctor or dissatisfaction by the patient are minimised.
Similarly, the cultural characteristics of the patient (and of the doctor) can profoundly affect
the quality of doctor-patient communication. Doctors practising in Australia require
multicultural competence across all fields of medicine. Special care is required in the case of
Aboriginal and Torres Strait Islanders, and for culturally and linguistically diverse groups.
Communication skills, although important, are not sufficient. Good communication skills
must be accompanied by sound clinical skills, attitudes and professional behaviour. The
(fortunately) rare physician serial criminal murderers have usually been superb
communicators.
Other personal factors can interfere with the doctor's use of communication skills. Many
clinical realities are unpleasant to both patient and doctor. If the doctor retreats behind a
professional fagade of a stilted and portentous style of speech, or adopts a pompous or
pretentious attitude, or one interpreted as such, the patient can be daunted from further
enquiry. Rejection by the doctor of a patient's attitude or behaviour engenders lack of
understanding and trust. Value judgements of the doctor are best avoided or concealed.
Care and compassion should be evident but not forced or obtrusive. This is especially
important when treating users of illicit drugs or dependent alcoholics. Mention should also
be made of the so-called 'difficult patient' whose underlying but sometimes unrecognised
personality disorder reduces or eliminates the effectiveness of the communication skills
described below.
The application of communication skills
Effective communication is of most value when taking a history, providing patient education
about the condition diagnosed, giving advice about treatment, counselling patients, and
when discussing the patient's illness with anxious relatives or friends.
History-taking
There are two main methods. Transition from one to the other occurs depending on the
clinical setting and progress of this phase of the consultation. The aim is to define the
presenting problem to a point where the diagnosis moves from possible to probable to
definite.
Firstly, the nondirective or 'open-ended' approach: this allows and encourages patients
to outline the problem ('tell their story') in their own way while the doctor listens with
little interruption. Although apparent irrelevancies may be brought up, this method gives
an opportunity for patients to reveal concerns initially unstated. These concerns may
explain their real reason for attending and why they have come at this particular time.
046
This approach is most useful when the patient is consulting the doctor for the first time
about undifferentiated symptoms such as 'tiredness', 'bloating', 'being run down', 'sleeplessness', or 'requesting a checkup'.
Secondly, the directive, closed or interrogative approach: this confines the patient to
the doctor's agenda. This is appropriate in emergencies and, if the problem has already
been well defined, when a patient's progress is being reviewed in followup. The doctor
takes early control of the interview by the use of a series of direct or closed questions.
This approach is well summarised by the traditional term — history 'taking'. The directive
approach risks the omission of significant information, particularly from a patient who is
anxious, reticent, embarrassed, or has feelings of shame or guilt.
Nonverbal communication is very useful in the nondirective approach and can replace some
parts of the verbal component, for example, expressing surprise by facial expression.
Transition from nondirective to directive mode occurs when the doctor begins to ask direct
or closed questions, but the two modes are usually phased or overlap. The type of question
used will change the direction of the interview. Using questions about pain as examples:
open ended
'Tell me about the pain?'
direct
Where Is the pain?'
closed
'Have you had this pain before?'
leading
'The pain isn't severe?'
A series of direct or closed questions is usually necessary to complete the history regarding
occupation, past and family illness, domestic habits, medications, allergies and sensitivities,
where relevant.
Facilitation is also a valuable nondirective tool. Facilitation uses nonspecific inviting or
encouraging remarks, for example, 'go on', 'I'm listening carefully', 'tell me more about the
pain', 'anything else?', 7 see', or 'uh uh'.
Listening is an essential basis of communication. Adequate time must be given and the
doctor's nonverbal behaviour should indicate to the patient that the listening is attentive.
Note-taking should be discreet and avoid distraction. The use of a personal computer by the
doctor in the consulting room while taking a history requires, more than ever, that the doctor's
nonverbal behaviour assures patients that they are being 'listened to'. Silence is not the same
as listening. Silence may be the best response when there is an emotional or confrontational
component in the consultation.
Confrontation can defuse an issue ('Wouldn't we progress better if we leave aside for the
moment your previous dissatisfaction with treatment and try to work out how best to fix
things now?') but should be used with care. Frequently initial aggression or anger from the
patient is better deflected in the first instance.
Summarising briefly what the doctor believes the patient has said so far is often useful to
confirm that mutual understanding at that point in the interview is present.
As previously noted, these techniques are modified by the personality and instinctive
behaviour of the doctor, who may not always be fully aware of their effect on a patient. The
perceptive doctor attempts always to appreciate the patient's perspectives as well as the
doctor's own.
In summary, the following guidelines apply to history 'taking' from a patient presenting with
a nonurgent diagnostic problem.
047
Following the formalities (or informalities) of introduction, the doctor should:
• begin with an open-ended approach;
• listen carefully and attentively;
• use facilitation and open-ended questions to encourage the patient;
• limit direct questions early in the interview;
• use indirect and reflected questions as appropriate;
• use direct and closed questions to take control at an appropriate time;
• take note of any display of emotion by the patient and respond appropriately;
• briefly summarise what is being learnt or understood (or not) from the patient;
• gradually increase control of the interview as it proceeds;
• use nonverbal communication, to supplement verbal communication; and
• be alert to the patient's nonverbal behaviour.
With loquacious and garrulous patients, transition from open-ended to direct questioning
needs to proceed expeditiously but tactfully because of time constraints. In many of the
MCAT clinical scenarios, direct questioning is essential to enable a focused history
to be taken within the time period available.
Communication skills are especially important when the patient has concerns other than
those expressed in the first statement to the doctor. Such hidden concerns may include
fears of cancer, heart disease, stroke, blindness, sexually transmitted infection, work
capacity, relationships, serious illness in an unborn child or infant, dissatisfaction with
treatment and feelings of grief or guilt — to mention only a few.
Patient education
Once the diagnosis has been made, it should be stated to the patient using both medical
and lay terminology appropriate to the patient's understanding. Initial reassurance should be
given when appropriate ('I'm pleased to tell you that the biopsy showed no evidence of
cancer'). Failure to do so may allow patient anxiety to block the reception of other information.
Reassurance may be the only therapy that is necessary — unnecessary prescribing may
follow if the doctor has not understood this basic need of the patient for reassurance.
The patient's knowledge and understanding of the condition should then be established so
that education can be pitched at the correct level. This includes the correction of incorrect
beliefs and responses to the patient's questions. The use of a chart, diagram or of printed
notes, may be additionally helpful.
As previously stated, anxiety may reduce the efficiency of absorbing and understanding
information. Patients will also differ in their interest and tolerance of information about their
ailments. Most will want to know if the condition is serious, whether it can be treated, when
they will recover and resume normal activities, and what forms treatment will take, even
though these questions may not be asked directly. Overloading the patient with information
can be counterproductive and have unwanted effects including the creation of pessimism
and anxiety. Further information can be added at a subsequent consultation. Handing out
previously prepared written material is helpful for most patients but is no substitute for
verbal education from the doctor.
Adverse information should be given in such a way so as to not destroy hope, and also to
assure the patient of the doctor's continuing support.
An adequate level of understanding is the only basis on which patients can share the
responsibility of decision-making about treatment and give informed consent. Many patients
048
however still prefer to leave all decisions to the doctor. If thought necessary, confrontation
can be used to bring to the attention of patients their own responsibilities in aiding effective
treatment.
Giving advice about treatment
The wide ranges of treatments, which may be indicated, include giving simple advice,
prescribing, minor or major procedures, the use of allied health professional services,
referral to another doctor or to a hospital service, and counselling. All require the use of
communication skills, either verbal, nonverbal, or written. When counselling is the main
component of treatment, additional special skills are required.
The duration of intended treatment should be advised to the patient and opportunities for
giving preventive advice taken whenever appropriate. This may involve other members of
the patient's family.
Prescribing should be supported by a statement of the name of the medication, which may
also be written down for the patient, the dose and timing, expected effects including the
most important side effects, and significant adverse reactions.
Patients will also wish to know general details about any procedure which has been
recommended, and what to expect when a referral has been made.
Patients should not be left wondering what happens next. Certainty about followup
arrangements, particularly after investigations or referral, should be made quite clear.
Neglect of these can have medicolegal consequences.
Patient Counselling
Counselling is a term widely used in the community to describe the provision of support to
individuals or groups who are experiencing significant emotional stress. Counsellors,
usually with special training in psychological skills, attend survivors or observers of
accidents and disasters and provide support.
Doctors frequently need to give 'bad news' to patients and relatives, and are involved with
bereavement and grieving responses. Allowing patients and relatives to work through their
feelings by means of facilitation and attentive listening, and providing support and
reassurance whenever possible, with unforced compassion and sympathetic
understanding, is required every day in clinical practice.
However, when 'patient counselling' is used in treatment, there are two types: directive and
nondirective. As with other communication skills these may overlap or be used in an
integrated way. However, one type usually predominates according to the clinical situation.
Directive counselling is when straightforward advice or instruction are given to the patient.
In contrast, nondirective counselling is a special communication skill which involves more
than patient education or giving advice about treatment. Its objective is that the patient,
instead of the doctor, is the final decision-maker and shares or accepts, in part or fully,
responsibility for the subsequent course and outcome of the problem. Nondirective
counselling begins with an accurate definition of the problem using the skills outlined under
nondirective history-taking, particularly listening and the use of silence. The doctor then
provides education about the problem including possible outcomes that are likely to follow
alternative forms of behaviour or non-compliance by the patient. Patients are then asked
what course they intend to follow, based on the options that have been discussed. The
process may occur rapidly or may take more than one consultation to work through. It is
essential for the doctor to maintain a nonjudgmental attitude throughout the process.
049
This skill is most useful in dealing with difficult behavioural problems such as smoking,
heavy drinking, eating disorders, drug use, marital problems and when dealing with
anxious parents.
When the use of addictive substances is involved, counselling has shortcomings as do
other techniques, but is always worth using — results can be surprisingly effective.
Assessing communication skills
Communication skills are assessed continuously throughout the whole of every case
scenario and consultation. Other domains are usually assessed in sequential segments
(for example physical examination follows history, diagnosis follows investigations, and so
on). Particular communication skills are also defined within the domains in current use in
the AMC examination. These are:
Approach to patient
•
•
•
•
•
Empathy, comfort, consideration,
Explanation, using language that the patient understands (no jargon),
Checking for patient understanding,
Answering patient's, parent's or relative's questions, and
Obtaining verbal consent to proceed.
History
• Taking an appropriately focused medical history.
Commentary to examiner
• Describing the findings of physical examination with appropriate commentary; and
• Presenting a case analysis in summary to the examiner.
Diagnosis/differential diagnosis
• Describing an appropriate diagnosis/differential diagnosis plan.
Initial management plan
• Describing an appropriate initial management plan.
Patient counselling/education
• Educating the patient/relative/carer about the condition; and
• Giving appropriate counselling.
Explanation of procedure
• Explaining a procedure and its implications to the patient.
Answering questions asked by the patient or examiner
• Most scenarios include cued questions to the doctor by the patient, parent or relative; and
• Some scenarios have specific prompts or questions from the examiner.
Each of the above domains (plus others such as technique and accuracy of examination 14 in all) attracts separate assessment by the examiner. The number of domains being
assessed in any individual MCAT rarely totals more than five. Communication skills may
affect performance in all domains. Experienced examiners, who are themselves skilled in
communication, have no difficulty in integrating communication components with those of
knowledge and attitudes and other clinical skills.
050
Communication, Counselling
& Patient Education
Conclusion
The effectiveness of virtually all consultations is enhanced by the doctor's understanding
and use of communication skills. The establishment of trust and confidence, empathy and
rapport, diagnostic precision, appropriate prescribing, patient education and
understanding, patient compliance, and self-help lifestyle modifications are all facilitated
when doctor and patient understand each other to an optimal level, as a result of the proper
application of communication skills.
Alan T Rose
051
1-A Communication, Counselling and Patient Education
Candidate Information and Tasks
MCAT 002-021
2
Advice on breastfeeding versus bottle-feeding for a 28-year-old pregnant woman
3
Advice on neonatal circumcision for a couple expecting their first child
4
Suspected hearing impairment in a 10-month-old child
5
Counselling a family after sudden infant death syndrome (SIDS)
6
Hair loss in a 38-year-old man
7
An unusual feeling in the throat in a 30-year-old man
8
Pain in the testis following mumps in a 25-year-old man
9
Contraceptive advice for a 24-year-old woman
10
Rape of a 20-year-old woman
11
Cancer of the colon in a 60-year-old man
12
Thalassaemia minor in a 22-year-old woman
13
Pre-pregnancy advice to a 28-year-old woman with previous thromboembolism
14
Pre-pregnancy advice to a 24-year-old woman with Type 1 diabetes mellitus
15
An anencephalic fetus diagnosed at 18 weeks gestation in a 25-year-old primigravida
16
A duodenal ulcer found on endoscopy in a 65-year-old man
17
Advice on autologous blood transfusion to a 55-year-old man awaiting elective surgery
18
Advice on stopping smoking to a 30-year-old man
19
Excessive alcohol consumption in a 45-year-old man
20
Type 1 diabetes mellitus in a 9-year-old boy
21
Request for vasectomy from a 36-year-old man
052
002-003
Candidate Information and Tasks
Condition 002
Advice on breastfeeding versus bottle-feeding for a 28-year-old
pregnant woman
CANDIDATE INFORMATION AND TASKS
You are a Hospital Medical Officer (HMO) in an antenatal clinic, seeing a 28-year-old
woman for her antenatal visit at 35 weeks of gestation. She wants to discuss infant feeding
with you. She has heard a lot about the benefits of breastfeeding, but her mother told her
recently that babies grow better with formula feeds. She is uncertain whether she should
breastfeed or formula-feed her baby.
YOUR TASKS ARE TO:
• Discuss the advantages and disadvantages of breast-feeding and formula-feeding
with her.
• Outline the steps involved in safe formula-feeding.
The Performance Guidelines for Condition 002 can be found on page 69
Condition 003
Advice on neonatal circumcision for a couple expecting their first child
CANDIDATE INFORMATION AND TASKS
A young couple, the wife pregnant with their first child, have come to see you in a general
practice to discuss with you the place of routine neonatal circumcision if their baby is a boy.
YOUR TASK IS TO:
• Discuss with the couple the perceived risks and benefits of this procedure.
]
J
The Performance Guidelines for Condition 003 can be found on page 72
053
Candidate Information and Tasks
Condition 004
Suspected hearing impairment in a 10-month-old child
( CANDIDATE INFORMATION AND TASKS )
You are working in a community health centre. Your next patient is a 10-month-old female
infant, baby Helena, seen with her mother, who has been referred by the local child health
nurse. The pregnancy and delivery were normal. The child presented to the nurse six
weeks ago for review and general screening including hearing. The nurse was concerned
that the baby has a hearing problem and wanted her checked by a doctor. The child's
parents have never had cause to worry about her hearing. She is the third child in a healthy
family and has been well, apart from a few upper respiratory infections.
She is crawling, does not walk yet, but pulls herself up to standing beside a small table.
Initial examination findings
A busy infant girl who objects to being restrained by her parent. She babbles during
assessment. Otoscopic examination is normal. No abnormal physical signs are present on
general examination. The parents are puzzled at the need for referral and seek information
about further investigation and management.
YOUR TASKS ARE TO:
• Ask the parent for additional relevant and focused history.
• Counsel the parent after you have obtained a further history.
• Explain possible causes of any suspected hearing loss to the parent.
• Discuss your plan of management with the parent.
The Performance Guidelines for Condition 004 can be found on page 75
054
Condition 005
Counselling a family after sudden infant death syndrome (SIDS)
CANDIDATE INFORMATION AND TASKS 1
You work in a general practice. You are counselling the family of a four-month-old male
infant who was rushed to the Emergency Department of the local hospital the day before
but was dead on arrival. The provisional diagnosis is sudden infant death syndrome (SIDS)
and the baby (Andrew) is to have a Coronial autopsy.
You had seen him for the first time two months previously, with his single mother, when he
was thriving and developing normally and had commenced immunisations. Two days
before his death you saw him again, this time with mild upper respiratory snuffles which
were causing minor difficulties with breastfeeding. However, over the next two days he
apparently improved, and his mother had advised you that he appeared normal and fed
well from the breast just prior to his death. You are unaware of any suspicious circumstances surrounding the death.
The family members have attended to seek details of why the baby died and why an
autopsy is necessary. The spokesperson for the group is the mother's sister, the aunt of the
infant. The mother is also present, but is too distressed to ask any questions herself.
YOUR TASKS ARE TO:
• Answer the questions of the aunt relating to the death of the infant.
• Counsel the aunt and family.
The Performance Guidelines for Condition 005 can be found on page 77
055
Candidate Information and Tasks
Condition 006
Hair loss in a 38-year-old man
CANDIDATE INFORMATION AND TASKS
You are a Hospital Medical Officer (HMO) working in a primary care clinic attached to a
teaching hospital. This 38-year-old male newsagent has just consulted you about recent
(2-3 weeks) hair loss from the scalp. One eyebrow is also affected. He is otherwise well
with no significant past or family history. The patient is very concerned about possible future
progression and wishes to ask you about the diagnosis and possible treatments. You have
completed an examination of the scalp. The findings are as depicted below.
YOUR TASKS ARE TO:
• Discuss the condition with the patient.
• Advise him about treatment.
CONDITION 006. FIGURES 1 AND 2.
The Performance Guidelines for Condition 006 can be found on page 79
056
Condition 007
An unusual feeling in the throat in a 30-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 30-year-old man who is
consulting you about a throat problem.
He is a previous patient of the clinic, is married with two children, parents and his siblings
are well. He smokes 10-15 cigarettes daily and takes 2-3 alcoholic drinks only at
weekends. He had a vasectomy two years ago and has had no serious illnesses.
YOUR TASKS ARE TO:
• Take a focused history about his throat problem. The examiner will then give you the
examination findings.
• Discuss the most likely causes of the problem and its nature with the patient.
• Discuss whether any investigations are necessary and if so, what is most likely to be
found.
.
The Performance Guidelines for Condition 007 can be found on page 81
057
008-009
Candidate Information and Tasks
Condition 008
Pain in the testis following mumps in a 25-year-old man
CANDIDATE INFORMATION AND TASKS
Your next patient in a general practice is a 25-year-old man who consulted you five days ago
because of painful swellings on both sides of his face associated with fever and malaise You
made a confident diagnosis of mumps.
You had previously diagnosed mumps in the patient's five-year-old son, a little less than three
weeks beforehand. The son has now fully recovered. The patient's other child, aged three years,
is well. You are aware that the couple have contemplated having another child.
You advised the patient to rest at home, suggested paracetamol as an analgesic, and asked him
to see you in a few days time before returning to work. The patient has come to see you today
because of a relapse of his fever associated with the onset of severe pain in his left testis.
You have found the left testis to be swollen to twice the size of the right one. It is very tender. The
right testis feels normal. The patient has a temperature of 38.4 °C. His face is slightly swollen.
Apart from a tachycardia, there are no other abnormal clinical signs.
YOUR TASKS ARE TO:
•
Advise the patient of the diagnosis.
•
Advise him about treatment and prognosis.
•
Answer any questions asked by the patient.
The Performance Guidelines for Condition 008 can be found on page 84
Condition 009
Contraceptive advice for a 24-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. A 24-year-old woman has come to see you for advice as to
the most appropriate pill she should go on for contraception for the next two to three years. She
knows that various types of pills are available and wants to know how to decide which is the most
appropriate pill for her.
YOUR TASKS ARE TO:
•
Take a further relevant and focused history.
•
Ask the examiner about findings you wish to elicit on general and gynaecological
examination.
•
Advise the patient of the appropriateness of oral contraceptive pill (OCP) therapy, which pill
should be given, and how it should be administered.
The Performance Guidelines for Condition 009 can be found on page 87
058
Condition 010
Rape of a 20-year-old woman
CANDIDATE INFORMATION AND TASKS J
You are a Hospital Medical Officer (HMO) in the Emergency Department of a metropolitan
general hospital. Your patient is a 20-year-old university student who is brought to the
Emergency Department of the hospital because she was raped by a man that she met at a
disco and who offered her a lift home. The rape occurred six hours ago after he had
stopped the car in an undeveloped area. She has decided not to involve the police as the
person concerned is known to her family. She has had no previous operations or illnesses
and no pregnancies.
YOUR TASKS ARE TO:
• Take any further relevant history you require.
• Ask the examiner about appropriate findings likely to be evident on initial general and
gynaecological examination.
• Advise the patient of the investigations required and the management you would
propose.
The Performance Guidelines for Condition 010 can be found on page 90
059
Candidate Information and Tasks
Condition 011
Cancer of the colon in a 60-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. A 60-year-old man, whose father died of colon
cancer, consults you following a screening colonoscopy. This revealed a lesion shown in
the photograph given to the patient (see illustration below). The biopsy report confirms an
adenocarcinoma of the colon. The patient insists he has no symptoms and refuses to have
any operative treatment. However, he is still concerned enough to ask you what will happen if
nothing is done. The specialist who did the colonoscopy said the lesion was on the left side
of the colon.
The patient also wishes to know what are the prospects of cure if he changes his mind and
has the lesion removed by surgery, and would the surgery ever entail having a colostomy
(which he dreads)?
YOUR TASKS ARE TO:
• Advise him what symptoms and signs may occur in the future, what complications
may develop and how they would be treated.
• Address his concerns and counsel him about surgery.
You are not required to take any further history.
CONDITION 011. FIGURE 1.
Clinical notes: Biopsy of ulcerating tumour of rectosigmoid at 15 cm from anus.
Biopsy report: The specimens show numerous fragments of a moderately well
differentiated adenocarcinoma of the colon with invasion into the
submucosal tissues.'
Diagnosis:
Adenocarcinoma of colon.
The Performance Guidelines for Condition 011 can be found on page 92
060
Candidate Information and Tasks
Condition 012
Thalassaemia minor in a 22-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 22-year-old woman who
recently had a self-limiting febrile illness, which was suspected to be infectious
mononucleosis (IM). She is now fully recovered. Blood tests for IM were negative, but the
full blood examination showed a hypochromic microcytic anaemia of 108 g/L. The mean
corpuscular volume (MCV) was below normal (68 cubic microlitres — normal 80-101). You
followed this up but there was no evidence of chronic blood loss (other than normal
menstruation). Serum iron and ferritin estimations were also normal. You suspected
/j-Thalassaemia minor ('Mediterranean anaemia') and this has been confirmed by
electrophoresis which showed an elevated Hb H2 level (4.3%).
You are aware of her Greek descent and that she has just become engaged to be married.
Her fiance is also of Greek descent. The family history is that her mother, father and brother
are all alive and well. Her grandparents died in Greece and both were very old. One of her
father's brothers was reported to have died in childhood from an unknown cause. The
patient is very worried about being told she is anaemic, and as she is to be married shortly,
is worried about the effects on any of the children she hopes to have.
The patient has returned to discuss her results with you.
YOUR TASKS ARE TO:
• Explain the nature of the condition to the patient.
• Answer the patient's questions.
• Advise the patient what should be done now.
The Performance Guidelines for Condition 012 can be found on page 95
061
013-014
Candidate Information and Tasks
Condition 013
Pre-pregnancy advice to a 28-year-old woman with
previous thromboembolism
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 28-year-old woman, who had
one pregnancy 18 months ago, which was complicated by deep vein thrombosis and a
postpartum pulmonary embolus. She has come to see you for pre-pregnancy counselling
as she wishes to conceive again. At the time of a previous assessment twelve months ago,
she had ceased warfarin. When assessed six months ago, there were no sequelae or
symptoms and she had no signs of chronic venous insufficiency in the legs. There are no
abnormalities on physical examination and she is not overweight.
YOUR TASKS ARE TO:
• Take any further relevant history you require from the patient.
• Advise the patient on the management she will require before and during the
next pregnancy.
The Performance Guidelines for Condition 013 can be found on page 99
Condition 014
Pre-pregnancy advice to a 24-year-old woman with Type 1 diabetes mellitus
CANDIDATE INFORMATION AND TASKS
You are working in the primary care facility of a teaching hospital. Your patient is a woman
aged 24 years (para 0, gravida 0), a known diabetic for 15 years and well controlled on
insulin. She has come to see you for counselling and advice about possible future
pregnancies.
YOUR TASKS ARE TO:
• Take any further relevant history you require.
• Advise the patient of the information she needs to be given for pre-pregnancy
counselling.
The Performance Guidelines for Condition 014 can be found on page 102
062
Candidate Information and Tasks
Condition 015
An anencephalic fetus diagnosed at 18 weeks gestation in a
25-year-old primigravida
CANDIDATE INFORMATION AND TASKS
You are a Hospital Medical Officer (HMO) working in a primary care clinic attached to a
teaching hospital. Your next patient is a 25-year-old primigravida who has just had an
ultrasound performed at 18 weeks of gestation, which has revealed an anencephalic fetus
(as shown in illustration below). A maternal serum screening (MSS) was done at 16 weeks
and this had shown elevated levels of alpha fetoprotein.
YOUR TASKS ARE TO:
• Take any further relevant history.
• Advise the patient, in lay terms, of the relevance of the diagnosis and the subsequent
management you would propose in this pregnancy.
• Advise the patient of the care you would recommend in a subsequent pregnancy.
You will not be expected to request examination findings, nor to arrange any further
investigations.
CONDITION015.FIGURE1.
Anencephalic fetus at 18 weeks of gestation
The Performance Guidelines for Condition 015 can be found on page 105
063
Candidate Information and Tasks
Condition 016
A duodenal ulcer found on endoscopy in a 65-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. You recently referred a 65-year-old man with a history of
self-medication for arthralgia and a subsequent six week history of epigastric pain and indigestion
to a gastroenterologist who performed an upper gastrointestinal endoscopy. The endoscopist told
the man he had detected a duodenal ulcer and gave him a photograph of the ulcer, taken during
endoscopy. The patient has come back to you seeking answers to several questions. The
photograph is as shown.
YOUR TASKS ARE TO:
• Discuss the endoscopic findings with the patient in terms of the:
~ pathogenesis of the ulcer;
~ natural history and possible complications of the condition; and
~ treatment options available to him.
CONDITION 016. FIGURE 1.
The Performance Guidelines for Condition 016 can be found on page 108
064
017-018
Candidate Information and Tasks
Condition 017
Advice on autologous blood transfusion to a 55-year-old man
awaiting elective surgery
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a middle-aged man booked for a
total hip replacement. You referred him to an orthopaedic surgeon who has arranged
elective surgery for his severely osteoarthritic hip. The patient has now come back to see
you, as he has some questions and in particular, is concerned about the risks of blood
transfusion (if required) and would like to find out about using his own blood for the
operation.
The patient wishes to discuss this with you, as he did not take in everything that was
explained by the surgeon.
YOUR TASKS ARE TO:
• Explain the principles and indications for preoperative blood collection and intra
operative autologous blood transfusion.
• Answer any questions from the patient about the blood transfusion procedure.
The Performance Guidelines for Condition 017 can be found on page 111
Condition 018
Advice on stopping smoking to a 30-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. The next patient is a 30-year-old man who has
returned to your practice for followup following a recent chest infection. He is a smoker (20
cigarettes per day). On his previous visit, you had told him that the 'best thing that he could
do for his health would be to stop smoking'. You have examined his chest which is clinically
normal.
At this visit, you are expected to follow up his response to your previous advice and counsel
him further about tobacco cessation.
YOUR TASKS ARE TO:
• Assess his motivation to stop smoking.
• Counsel him appropriately.
• Discuss treatment options and general resources.
• Respond to any questions he may have.
The Performance Guidelines for Condition 018 can be found on page 115
065
Candidate Information and Tasks
Condition 019
Excessive alcohol consumption in a 45-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. You are about to review a 45-year-old businessman
who consulted you two days ago about his drinking after seeing a TV program about the
harmful effects of alcohol.
At the previous consultation you established the following:
• He is drinking excessively (at least five standard drinks every day);
• This is of long standing — at home, at work and socially;
• He has problems at work;
• He has trouble with his close family relationships;
• His sexual performance is impaired;
• He has had two minor traffic accidents in the last year;
• He has a family history (grandfather) of alcoholism; and
• On examination he is overweight (BMI 28 kg/m2), hypertensive 180/90 mmHg, and has
hepatomegaly.
You told him that his use of alcohol appears to be excessive and you ordered liver function
tests and a full blood examination. He is seeing you today for the results of the tests which
are as follows:
Liver Function Tests
Bilirubin Total
14 umol/L
(<20)
ALP (Alkaline phosphatase)
AST (Aspartate transaminase)
GGT (Gamma glutamyl transaminase)
Serum albumin
50u/L
45 u/L*
63 u/L*
32g/L
(25-100)
(<40)
(<50)
(32-45)
Full Blood Examination
This showed a normal haemoglobin level (145 g/L) with a macrocytosis and elevated
mean corpuscular volume (MCV) of 106 fL (normal range 10-96) and some
variations in red cell size and shape (anisocytosis and poikilocytosis). Other features
were normal.
YOUR TASKS ARE TO:
• Explain the results of the tests to the patient.
• Discuss the effects of the excessive alcohol consumption.
• Counsel him about his drinking.
You do not need to take any further history, nor perform any examination. The
Performance Guidelines for Condition 019 can be found on page 121
066
020-021
Candidate Information and Tasks
Condition 020
Type 1 diabetes mellitus in a 9-year-old boy
CANDIDATE INFORMATION AND TASKS
A nine-year-old boy, Roger, is admitted to the paediatric unit to which you are the Hospital
Medical Officer (HMO). This is his first presentation of insulin-dependent Type 1 diabetes
mellitus. His general condition is satisfactory, not requiring intravenous resuscitation, and
he has already commenced insulin therapy and has stabilised with good blood sugar
control.
As the Ward HMO, his mother has asked you for further information about his ongoing care
in relation to his diabetes from now on.
YOUR TASK IS TO:
• Answer the queries the mother has, related to the ongoing care of Roger's diabetes.
The Performance Guidelines for Condition 020 can be found on page 125
Condition 021
Request for vasectomy from a 36-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. You are seeing a man aged 36 years who indicates
that he wishes to discuss vasectomy with you. You have enquired about his past medical,
family and social history (see below). He is asymptomatic across all his body systems.
Physical examination is normal, including his scrotum, testes and penis. Blood pressure is
120/70 mmHg, urinalysis normal. He is not overweight. You believe that he is in good
physical health.
You have already obtained the following patient details:
• He has been married for 12 years and has two children (a boy aged seven and a girl
aged nine years). There are no marital problems of any kind;
• He is a senior constable in the police force, does not smoke but is a moderate alcohol
drinker (three standard drinks a day);
• He has no known drug sensitivities;
• His mother, father and brother are well, as are his wife and two children; and
• He is not on any medication.
YOUR TASKS ARE TO:
• Explain the sterilisation procedure and its consequences to the patient.
• Answer the patient's questions and provide counselling accordingly.
There is no need for you to take any additional history from the patient. The
Performance Guidelines for Condition 021 can be found on page 129
067
1-A
Communication,
Counselling & Patient
Education
1-A Communication, Counselling and Patient Education
Performance Guidelines
MCAT 002-021
068
2
Advice on breastfeeding versus bottle-feeding for a 28-year-old pregnant woman
3
Advice on neonatal circumcision for a couple expecting their first child
4
Suspected hearing impairment in a 10-month-old child
5
Counselling a family after sudden infant death syndrome (SIDS)
6
Hair loss in a 38-year-old man
7
An unusual feeling in the throat in a 30-year-old man
8
Pain in the testis following mumps in a 25-year-old man
9
Contraceptive advice for a 24-year-old woman
10
Rape of a 20-year-old woman
11
Cancer of the colon in a 60-year-old man
12
Thalassaemia minor in a 22-year-old woman
13
Pre-pregnancy advice to a 28-year-old woman with previous thromboembolism
14
Pre-pregnancy advice to a 24-year-old woman with Type 1 diabetes mellitus
15
An anencephalic fetus diagnosed at 18 weeks gestation in a 25-year-old primigravida
16
A duodenal ulcer found on endoscopy in a 65-year-old man
17
Advice on autologous blood transfusion to a 55-year-old man awaiting elective surgery
18
Advice on stopping smoking to a 30-year-old man
19
Excessive alcohol consumption in a 45-year-old man
20
Type 1 diabetes mellitus in a 9-year-old boy
21
Request for vasectomy from a 36-year-old man
002
Performance Guidelines
Condition 002
Advice on breastfeeding versus bottle-feeding for a 28-year-old
pregnant woman
AIMS OF STATION
To assess the candidate's ability to advise a young expectant mother on the advantages and
disadvantages of breastfeeding and bottle-feeding. This scenario tests the candidate's ability to
identify the conflict the young mother has in trying to respect what her mother has told her, while
knowing that this advice is contrary to her own feelings. It also tests ability to discuss logically the
advantages and disadvantages of the different feeding methods as well as testing knowledge on
safe bottle-feed preparation.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a 28-year-old mother having your first baby. You now have only five weeks to go and
although you always hoped to breastfeed your infant, you have had some doubts about its value
recently when your mother mentioned that formula-fed babies grow better than babies who have
been breastfed. You have come to discuss this. You realise that you may have to defend what
the doctor says to you (about breastfeeding being advantageous), and your own previously held
ideas about breastfeeding, against the ideas of your mother with whose opinions you have to
live.
Opening statement
'My mother feels that bottle-fed babies gain more weight than breastfed babies and therefore are
more healthy. What do you think, doctor?'
Questions to ask if not already covered:
• 'What are the advantages of breastfeeding? I would have thought it is easier to breastfeed.'
• ‘Is there anything special about breast milk? I always thought there was.'
• 'Do you have to prepare bottle feeds in any special way?'
• 'Are the formula feeds safe? I thought they contained cow's milk and what if you are allergic to
cow's milk?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should:
• Be nonjudgmental, avoiding comments like 'Where on earth did your mother get such an
idea?'; rather asking 'Why do you think your mother made such a recommendation?'
• Discuss that while breastfeeding is the optimal method of feeding the human infant, and that
the majority of mothers successfully breastfeed, a variety of reasons may prevent
breastfeeding in practice, including:
~ illness in the mother;
~ failure to establish lactation, which may be hormonally based;
~ possible illness in the baby (e.g. cleft palate);
069
002
Performance Guidelines
~ prematurity, which requires the mother to express regularly to maintain her supply;
~ previous extensive breast surgery in the mother; and
~ heightened anxiety in the mother.
Explain that if for some reason breastfeeding is unsuccessful, formula-feeding is a safe
and very effective alternative.
Discuss that formulas are designed to contain the same nutritional components as
breast milk, but that exact reproduction is difficult as the concentration and components
of breast milk change throughout each feed.
Advise that there is no advantage of formula-feeding over breastfeeding.
Discuss the specific advantages of breastfeeding:
~ the practical advantages of being able to feed almost whenever and wherever the
baby wants it without having to prepare formula, carry bottles around and without
problems with sterility;
~ increased resistance of the baby to infection, from immunological constituents in
breast milk including lymphocytes and antibodies; and
~ satisfaction derived from feeding the infant as well as the development of a close
relationship with the infant.
•
•
•
•
• In response to her mother's comment, advise that weight gain is not the only criterion for
success as excess weight gain in the first 12 months of life may in fact be detrimental in
later life.
The candidate should stress the importance of optimal formula-feeding as follows:
~ sterility in preparing the bottle feeds is essential;
~ bottles need to be washed clean with a bottlebrush to ensure that all milk residue is
removed;
~ bottles and teats need to stored in solution (e.g. Milton®), to ensure continuing
sterility, but the bottles need to be rinsed free of this solution prior to use;
~ the fluid used to make the formula and to rinse the bottles should be cooled boiled
water;
~ each can of formula has explicit makeup instructions on the side of the can or packet;
if followed these will produce the exact required concentration;
~ there is no place for any added scoops, which can be harmful;
~ the day's requirements are best made up at the one time, although each feed can be
made separately. If the former, the day's feed should be stored in the refrigerator;
~ only one day's feed at a time should be prepared in advance; and
~ each feed should contain approximately 30 ml more than it is anticipated the baby
may take, and any excess discarded at the end of the feed.
KEY ISSUES
• Empathic answering of this young mother-to-be's questions.
• Recognition that she is uncomfortable with what her mother has told her but is seeking
reassurance and support for her own view which she feels is accurate.
• Satisfactory explanation of the advantages and disadvantages of the different methods
of feeding.
• Candidates should know how formula feeds are prepared.
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CRITICAL ERROR - none defined
COMMENTARY
Ability to discuss impartially and accurately the relative merits, indications,
contraindications and techniques of infant feeding by breastfeeding and by
formula-feeding is a requisite for all medical graduates as outlined and is an area where
good communication skills are paramount.
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Condition 003
Advice on neonatal circumcision for a couple expecting their first child
AIMS OF STATION
To assess the candidate's ability to give impartial advice about neonatal circumcision.
EXAMINER INSTRUCTIONS
The examiner will have instructed the parents as follows:
You are a couple who are expecting your first baby. Your family members have suggested
that if the baby is a boy he should be circumcised. You are very unsure about this, as you
cannot see any reason why circumcision is essential. You have no religious beliefs that
dictate that circumcision must be done. You have therefore come to discuss the process
and learn what the advantages and disadvantages of the procedure are before making
your own decision on the matter.
Opening statement
‘We have come to discuss with you whether to have our baby circumcised.'
Questions to ask unless already covered:
•
•
•
•
•
‘What does the procedure involve?'
'What are the complications that can happen?'
‘What are the advantages of having it done?'
'Are there any times when it definitely should or shouldn't be done?'
'Has anyone looked into this in detail and come to any conclusions about it?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should:
• give an impartial but informed explanation to the parents on the advantages and risks
involved in routine neonatal circumcision;
• indicate that when religious grounds are stated as the reason for the procedure, these
are generally respected; and
• realise that many are unaware of the actual process of circumcision and may ask for the
procedure more as a ritual; and stress that the parents should consider the advantages
and disadvantages of the procedure before making a decision.
During the discussion, the candidate would be expected to advise along the following
lines:
• The perceived advantages of routine neonatal circumcision commonly quoted are:
~ Reduced incidence of urinary tract infections (UTIs) in circumcised boys. While
circumcision may assist the uncircumcised boy who is suffering recurrent UTIs,
routine general circumcision of all boys is not indicated to achieve this, but can be
selectively applied at a later age if this situation exists.
~ Reduction in the incidence of sexually transmitted infections (STIs) and HIV infection.
This remains a controversial point. The literature currently is divided on this issue, but
some evidence suggests the risk of HIV infection is lessened by circumcision.
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~ Circumcision is indicated for phimosis or its prevention. This is true only if all
conservative methods of treatment have failed. Often, phimosis, developing after
birth, is secondary to inappropriate foreskin care and subsequent trauma and
scarring. If asked, the candidate should indicate the appropriate care of the foreskin,
which is minimal, until the foreskin can be retracted easily, which is usually by about
five years of age.
~ Neonatal circumcision minimises the risk of subsequent development of carcinoma
of the penis. But poor penile hygiene associated with human papilloma virus infection
is the major contributor in adults, cancer being rarely seen in men who can retract
and clean the foreskin.
• The recognised complications and disadvantages of routine neonatal circumcision
should also be discussed and include:
~ haemorrhage;
~ infection, including septicaemia/meningitis (rare);
~ ulceration of the glans;
~ inadvertent injury to the urethra;
~ too much skin removed leading to unsatisfactory cosmetic appearance;
- anaesthetic complications; and
~ secondary phimosis.
The complication rate has been estimated to occur with an incidence of between 1-5%
(range 0.2%—10%); but these are figures at all ages, not just in the neonatal age range. The
skill of the operator is obviously of paramount importance. The most common complication
is haemorrhage.
• The candidate should also discuss the absolute contraindications to routine neonatal
circumcision explaining each in turn:
~ hypospadias and other congenital anomalies of the penis (e.g. epispadias);
~ chordee;
~ buried penis;
~ sick infants, including jaundiced infants;
~ family history of a bleeding disorder or known recognised familial bleeding disorder
possibility (e.g. haemophilia A); and
~ inadequate expertise and facilities.
• The candidate should be able to explain the procedure of circumcision and indicate
that:
~ it is usually done under local anaesthesia; and
~ if performed after six months of age, it is done under general anaesthesia.
KEY ISSUES
• The ability to discuss in an unbiased manner the perceived advantages and
disadvantages of routine neonatal circumcision.
• Capacity to summarise that the recommendations of various national and international
paediatric and paediatric surgical associations, who have extensively reviewed the
literature on the subject, do not support routine neonatal circumcision.
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CRITICAL ERROR - none defined
COMMENTARY
This topic is one that has been controversial for many years. While circumcision for religious
reasons has been done for many centuries, the issue in the scenario is related to the secular
trend towards routine neonatal circumcision of all males soon after birth. This has become more
of a ritual rather than for any recognised medical indication, although this tendency has reduced
in recent times. In fact there are many recognised complications of circumcision, not just routine
neonatal circumcision, but circumcision at any age. However there are recognised medical
indications for the procedure (e.g. established phimosis in boys and men).
CONDITION 003. FIGURES 1 AND 2.
Circumcision in ancient Egypt
Phimosis
Many young parents are unaware of the issues involved and are often ill-informed by family
members who recommend that their infant should have the procedure performed without any
explanation as to why. They then request circumcision without any information about the
procedure and hence the need for informed discussion to allow them to make a rational decision
in the interests of their baby.
This scenario illustrates that medical practitioners are obliged to provide accurate information on
the risks and benefits of routine neonatal circumcision and should attempt to avoid any personal
bias. The decision should be left to the parents after a full and accurate discussion.
Unbiased up-to-date written material summarising the evidence should be made available to the
parents.
The review of the literature in relation to risks and benefits shows there is no evidence of
benefit outweighing harm for neonatal circumcision as a routine procedure.
The Policy Statement on Circumcision from the Paediatric and Child Health Division of the Royal
Australasian College of Physicians (September 2004) is recommended as an excellent summary
with 78 references to the evidence for and against circumcision. This is available on the open
website of the Royal Australasian College of Physicians under Policies (http://www.racp.edu.au).
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Condition 004
Suspected hearing impairment in a 10-month-old child
AIMS OF STATION
To assess the candidate's ability to deal with suspected hearing loss in an infant aged 10
months and ability to appropriately counsel the parent.
EXAMINER INSTRUCTIONS
The examiner will have instructed the parent as follows:
You have a 10-month-old girl called Helena. You have been referred by the local childcare
nurse for a suspected hearing loss in your daughter. You and your husband are concerned
as you feel baby Helena's hearing is normal. Your responses to questions asked are
outlined below. You will accept advice about referrals. If referral is not suggested, you
should ask — do you think further tests would help?'
The candidate is expected to take a relevant history to determine if hearing loss may be
present as suspected by the child health worker despite the good sign of babbling, and to
provide succinct, accurate advice to concerned parents, who have noted nothing amiss
with her development or hearing.
The candidate should ask for history details as below (your response is indicated in
brackets):
• ‘Is there a family history of deafness?' (none);
• Maternal problems in pregnancy — 'Were there any problems with the mother during
pregnancy especially infectious diseases?' (none)
• Perinatal problems — 'Were there any health problems with the baby during or soon
after birth?' (none)
• General development — 'Is the baby growing and thriving?' (satisfactory same as the
other children)
• 'Does the baby respond to sounds, including loud sounds?' (seems to hear them and
respond)
• 'Does the baby respond when called by her name?' (usually)
• 'Does the baby turn towards the sources of the sounds?' (sometimes)
• 'Does the baby respond to television?' (sometimes).
In regard to any of the above aspects, the parents have noted no abnormalities in regards
to her response to sound.
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EXPECTATIONS OF CANDIDATE PERFORMANCE
The history should cover most of the questions detailed above.
The candidate should explain that:
• Hearing loss is common in preschoolers — most cases are mild and transient due to
conductive deafness from middle ear effusions.
• Sensorineural hearing loss is less common but important to detect as early as possible.
• Distraction tests are only a screening tool and do not diagnose deafness.
• Often it is the parents who recognise that there is something wrong; but the child health
nurse is also a professional and her concerns must be followed up.
• If there is a problem then the earlier the diagnosis the better.
The candidate should give the following advice:
• Refer the child to a Paediatric Audiologist as soon as possible for more formal hearing
assessment by an audiogram.
• Review following audiogram.
• If normal, reassure and review hearing and early language development in about three
months.
• If abnormal, refer to appropriate specialist for further evaluation.
The candidate should exhibit understanding for the parent's concern and provide guarded
reassurance and support.
KEY ISSUES
• Appropriate history relevant to deafness.
• Counselling with reference to early definitive screening for hearing.
• Providing appropriate level of support and reassurance.
CRITICAL ERROR
• Failure to refer for specialist assessment (audiogram) for definitive diagnosis.
COMMENTARY
The candidate is expected to proceed from the cue of 'possible hearing loss' to assess
whether other evidence, such as failure to turn to sound, is present to support this
diagnosis. In addition, enquiry regarding features suggesting associated developmental
delay is appropriate. Given a working hypothesis of possible hearing loss, features in the
history which could be causative, such as maternal illness in pregnancy, perinatal
problems such as jaundice or drug administration, should be evaluated. However, the
importance of early diagnosis and treatment of significant hearing deficit in this age group
make referral for definitive diagnosis mandatory despite no other concerning features
being present.
Adequate communication skills in dealing with a concerned patient are essential, used in
combination with appropriate knowledge-based clinical skills.
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Condition 005
Counselling a family after sudden infant death syndrome (SIDS)
AIMS OF STATION
To assess the candidate's ability in approach to the family and providing empathic
counselling in this tragic situation of presumed sudden infant death syndrome (SIDS) where
there are no suspicious circumstances. Candidates should outline the statutory
requirements (i.e. notifying police and coroner), in a caring and sympathetic manner.
EXAMINER INSTRUCTIONS
The examiner will have instructed the relative as follows:
You are the aunt of an infant who died, apparently of SIDS, the day before. The family
members including the young single mother have attended to ask questions about the
baby's death but the mother is still too distressed to ask them herself. You are the
spokesperson of the family.
Opening statement
‘We can't understand why Andrew has died!'
Questions to ask unless already covered:
•
•
•
•
•
•
‘Why do the police have to be involved? Do they think my sister killed her baby?'
‘Why does he have to have an autopsy?'
‘When will we get further information and results of this?'
‘When can we arrange his funeral?'
‘We feel so alone. Is there anyone we can talk to about this?'
'Should the snuffles have been treated?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
Explanation of diagnosis
The most likely cause of the child's death is SIDS. Candidates should explain what is known
about SIDS along the following lines:
• the frequency of SIDS has fallen from 1 in 500 live births to now approximately 1 in 1000;
• the peak incidence occurs at about four months of age; and
• there are no certain causes known. Many theories exist, but none is proven.
Explain that there can be other causes of sudden infant death (for example, overwhelming
infection), but the child's history does not suggest this cause. Andrew's snuffles were not a
warning sign and there is no suggestion that any medical treatment would have influenced
the outcome.
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Immediate management following a death due to apparent SIDS — should be advised
empathically as follows:
• Explain that the police and the Coroner must be notified by law because Andrew's death
was sudden and unexplained.
• Explain that the role of the Police Officer is to assist the Coroner — police are required
to interview all people concerned including the baby's general practitioner.
• Explain the need for the autopsy in all cases, and that autopsies are done by very
experienced pathologists in an attempt to find out what causes SIDS, and to exclude
other possible causes of death.
• Explain that tissues will be removed for further examination under the microscope.
• Offer to contact the Coroner later to obtain information on the initial findings after the
autopsy has been performed or advise that the Coroner's office will contact the mother
at a later date to giver further information.
• Offer to contact other family members for support for the mother.
• The Coroner will decide if an inquest needs to be held, but with SIDS this is generally
not necessary.
• Offer to contact the local SIDS Support Group, if one is available.
Future management
Followup contact with family and with the Coroner/pathologist to confirm diagnosis. Liaise
with support group in counselling the mother when results are available.
KEY ISSUES
• Appropriate empathic explanation.
• Ability to explain the involvement of appropriate authorities and support groups.
• Offering to arrange for continuing followup, contact and support with the family.
CRITICAL ERRORS
• Failure to display empathy in counselling.
• Failure to recognise and explain need for coronial notification and autopsy.
COMMENTARY
Empathy in communication is essential in these tragic circumstances, together with
accurate knowledge of legislative requirements. All deaths under these circumstances
must be reported to the Coroner and the police must take statements. This is often the most
distressing part of the process for young parents and should be explained carefully to the
family why this process needs to happen by law.
The caring practitioner will also offer to liaise with the Coroner on behalf of the parents, and
in this way is often able to receive preliminary reports if the Coroner is agreeable to them
being released, which many Coroners are. Several pathologists who perform these
autopsies actually interview the parents themselves when the autopsy is completed.
The caring practitioner will offer to keep contact with the grieving couple or parent until
confident that this tragic event has been accepted.
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Condition 006
Hair loss in a 38-year-old man
AIMS OF STATION
To assess the candidate's ability to deal with a cosmetic problem, almost certainly alopecia
areata, for which treatment and prognosis are uncertain.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a 38-year-old male newsagent, married, with two children. Your general health is
excellent and you do not smoke or use alcohol. Past history is clear and there is no significant
family history including baldness.
You work long hours with the usual stress associated with running a small business, but
otherwise have no social or family problems. You are worried about your appearance because
of your contact with customers. You are concerned about the cause of the hair loss and are
very anxious to have treatment and also to be assured of effectiveness of treatment. Become
impatient if simple reassurance is the main advice given.
Opening statement
'What is happening to my hair?'
Questions to ask if not already covered:
• 'Will I go completely bald?'
• 'Will it improve?'
• 'How long will it last?'
• 'What can be done about it?'
• ‘Is treatment effective?'
• 'Should I see a specialist?'
• 'Could it have anything to do with my glands? OR with my thyroid gland?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should recognise that the patient has alopecia areata and is concerned about
his appearance; and should explain the nature of the condition in such a way that the possibility
of improvement or return to normal is emphasised but the natural history is unpredictable in
individual cases. The objective is to achieve patient understanding and acceptance of his
condition based on correct information. The patient's questions should be answered directly
with supportive explanation.
The candidate should explain that:
• Initial management is by topical medication which aims to stimulate hair regrowth. Any one
agent should be used for 3-6 months before changing therapy.
~ Potent topical corticosteroid applied once or twice daily — e.g. betamethasone
dipropionate .05%.
~ Intralesional corticosteroid such as triamcinolone acetonide 10 mg/mL is useful for small
areas on the scalp or eyebrows. Multiple injections are usually required.
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•
•
•
•
•
~ Topical dithranol applied once daily, commencing at 0.5% increasing gradually to 2%
(avoid eye contact). ~ Topical minoxidil (5% lotion) applied twice daily in cases not
otherwise responding
(but has very limited effectiveness).
Oral corticosteroids may be Mailed if topical treatment is ineffective, tapering dosage
downwards over two months.
If the condition worsens, disguising the hair loss with a wig may be considered.
Consideration of topical immunotherapy and ultraviolet phototherapy would require
referral to a dermatologist.
Some patients may require early referral for confirmation of the diagnosis and reinforcement of advice about the likely course.
Followup arrangements should be made appropriately.
KEY ISSUES
• Effective communication skills are very important in this case. Appropriate language,
verbal and nonverbal communication, and good interpersonal skills should be displayed by the candidate.
• Showing empathy, sensitivity and perceptiveness, as well as being honest and
generating trust and confidence are particularly important in a chronically relapsing
condition such as this which significantly affects the patient's appearance.
• Place of topical and systemic treatment and prognosis.
CRITICAL ERROR - none defined
COMMENTARY
Alopecia is a generic term for hair loss. Alopecia areata is a descriptive term for one or
more discrete circular areas of hair loss. These areas can occur anywhere on the body
including the beard area in males.
Alopecia universalis is where there is complete hair loss from the whole body and is a
variant of alopecia areata. The condition is a chronically relapsing autoimmune disease
with an extremely variable natural history. Patches on the scalp may regrow spontaneously,
remain unaltered or enlarge and coalesce into alopecia totalis (whole scalp).
In a case such as this scenario, there is approximately a 33% chance of complete regrowth
within six months and a 50% chance within one year. Approximately 80% of patients,
however, will eventually relapse. If the hair loss persists for years, the prospect of regrowth is
diminished, although the potential for hair regrowth always remains because the hair
follicle is not destroyed.
The aetiology is unknown, but a family history is present in 20% of cases and there is a
linkage with other organ-specific autoimmune diseases. There may be a specific trigger
such as a febrile illness or severe emotional stress (for example, the death of a family
member). Less severe day-to-day stress is not considered to be a trigger. The condition
itself is stressful, especially in females.
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Condition 007
An unusual feeling in the throat in a 30-year-old man
AIMS OF STATION
To assess the candidate's ability to take a satisfactory history about globus pharyngeus
disorder and to display perspective in selecting appropriate investigations, and skill in
counselling and educating a patient about the condition.
EXAMINER INSTRUCTIONS
Examiners should note that the scenario covers the initial consultation about the problem
and that ongoing management is not being assessed.
The examiner will have instructed the patient as follows:
You are a 30-year-old man, happily married with two children. Your parents and siblings are
in good health and apart from vasectomy two years ago, your past medical history is clear.
You smoke 10-15 cigarettes daily and only drink socially at weekends. You are consulting
the doctor about an unusual feeling in your throat.
Opening statement
‘I keep getting a lump in my throat. It feels like a knot.'
Provide more information as follows:
Without prompting:
Present your symptoms in a straightforward manner. You have become concerned since
the recent vomiting episode. You have had no previous worry about your health and you
have no idea what the nature of your complaint is, but you now wish to have it thoroughly
investigated.
Over the last 4-6 weeks you notice that:
• your throat tightens up;
• you have excessive saliva;
• you clear your throat repeatedly;
• a few days ago, it was very bad and you vomited; and
•
•
•
•
it occurs mostly after your evening meal. if questioned, answer as follows:
the feeling lasts 3-4 hours, usually until you go to bed;
you swallow more often when you have it;
there is definitely no difficulty swallowing solids or liquids which go down easily without
discomfort;
• when your throat tightens, your voice can 'catch', and your eyes water; and
• your voice is otherwise unaffected.
There is:
• no hoarseness of the voice;
• no sore throat, cough or nasal discharge or discharge from the back of the nose into the
throat (called postnasal discharge);
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• no loss of weight, appetite change, abdominal pain or regurgitation (water brash);
• no shortness of breath, palpitations, chest pain or dizzy spells;
• no aggravation of symptoms brought on by lying down; and
You:
• sleep well, have no other symptoms and do not take any medications;
• believe you are in good health;
• never take time off work;
• feel fit;
• have no past history of anxiety or other psychiatric illness;
• do not feel depressed or anxious;
• have no particular worries about your everyday life, wife and children;
• are conscientious and hardworking but not a worrier; and
• usually enjoy work, but have felt annoyed in the past few months when having to work
weekends — you feel you should be with your family.
A cousin died from cancer of the larynx, three months ago. You used to be close as
children. He had been a heavy smoker and drinker in adult life, and you grew apart. You
were upset by his death, but no more than you would expect for normal grief. His death is
still on your mind, as well as the thought of cancer at times.
If the doctor reassures you without discussing the possibility of any investigations say: 'You
don t seem to be taking my complaint seriously'.
Alternatively, if the doctor advises multiple investigations all of which are to be done at once
say: 'Isn't there just a simple test to check my throat out?'
Examiner statement
When the candidate has completed the history or after five minutes the examiner should
say: 'Physical examination of this patient is completely normal. You should now
discuss the problem with the patient as stated in your tasks'.
EXPECTATIONS OF CANDIDATE PERFORMANCE
•
The focused history is expected to exclude dysphagia and hoarseness, any
disturbance in general health and to reveal the patient's concerns about the cause of his
cousin's death.
• The diagnosis of globus disorder (subject to laryngoscopy) should be made, but may
not be directly stated to the patient. Examiners should use their discretion in assessing
how the candidate describes this functional disorder to the patient. Other than gastrooesophageal reflux, there is a list of much less likely differential diagnoses for this
patient.
• Choice of investigations:
~ Laryngoscopy and pharyngoscopy must be done.
~ Chest X-ray with thoracic inlet views and barium swallow are acceptable.
~ Upper gastrointestinal endoscopy may be suggested for reassurance.
~ Bronchoscopy is not indicated.
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CONDITION 007. FIGURE 1.
Laryngoscopic view — normal vocal cords
• Patient counselling and education: the correct diagnosis should be explained as most likely
being a nonserious condition with transient change in sensation or function of the throat;
~ the condition is brought on by emotional factors;
~ the condition needs limited investigations which should be explained; and ~
investigations are unlikely to reveal any serious process.
KEY ISSUES
• Ability to take a focused history.
• Ability to discuss a probable functional disorder with a concerned patient.
CRITICAL ERRORS
• Failure to request laryngoscopy or upper pharyngeal/oesophageal endoscopy.
•
Failure to indicate to the patient that serious disease is extremely unlikely.
COMMENTARY
This patient is presenting with recent onset of mild symptoms localised in the same anatomical
region as his cousin's recent cause of death, the role of normal grief and worry about cancer
being largely unrecognised.
Globus pharyngeus disorder (globus hystericus) is a physiological symptom associated with
altered mood states, often grief, but not associated with any specific psychiatric disorder or
necessarily requiring psychiatric treatment. Elevated cricopharyngeal pressure or abnormal
hypopharyngeal motility may exist at the time of the symptoms. The same sensation may result
from gastro-oesophageal reflux or from frequent swallowing and mouth dryness.
Other causes of upper oesophageal or laryngeal compression are retrosternal goitre, carcinoma
of laryngopharynx, oesophageal or cricothyroid web (sideropenic dysphagia). Skeletal muscle
disorders, myasthenia gravis, myotonia dystrophica, and polymyositis are other potential
causes of dysphagia. None is likely in this case.
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Condition 008
Pain in the testis following mumps in a 25-year-old man
AIMS OF STATION
To assess the candidate's knowledge of mumps orchitis including natural history, management,
prognosis and preventive medicine aspects, and communication skills in dealing with an unwell
and anxious patient.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You thought you were recovering from mumps, having noticed the onset of facial swelling about a
week ago. You contracted the disease from your older son aged five years. You are now
consulting the doctor about a painful and very tender left testicle. Analgesics (Panadol®) have
had little effect. The doctor has examined you and will now advise you about your condition.
You are in quite severe pain and feel most unwell. You are anxious about possible sterility (you
and your wife would like to have a daughter), whether the other testis will also be affected,
possible impotence, your infectivity (you have a wife and other younger son) and how long you
will be away from work. Be cooperative and willing to accept the doctor's advice if presented
clearly.
Questions patient should ask if not already covered (the candidate's expected
response is in brackets):
•
'What is the connection between the mumps and this trouble?' (Doctor should explain how
mumps virus is related to testicular problems — viral aetiology)
•
‘What can I take for the pain?' (Pain killers that contain codeine compound analgesics)
•
'Are there any antibiotics or other drugs for this condition?' (Not at this stage)
•
‘Will it affect both of my testicles?'(Unlikely, usually only one is affected. Unless the other
testicle becomes affected, there would not be any expected influence on fertility. Sterility can
rarely follow if both testicles are affected)
•
‘Will we be able to have another child, if we decide to?' (Yes, fertility is not likely to be affected)
•
'Will my sex life be affected?' (No problems anticipated)
•
‘What will happen to the testicle eventually?' (Possibly reduction in size, but usually remains
fully functional. Function of the other testis is usually unaffected)
•
When will I be able to go back to work?' (Depends on how rapidly the pain and swelling
persists — about 7-10 days)
•
‘Why wasn't my son affected in this way?' (Orchitis — inflammation of the testicle — is
extremely rare in childhood)
•
‘Will our younger son get mumps too?'(If he is immunised already with
measles-mumps-rubella (MMR) vaccines, he is at minimal risk. If he is not immunised, he is
unlikely to contract mumps from his brother, but he may still be infected from his father. The
younger son should be immunised if not already done)
•
'Are there any other complications of mumps?'(Very occasionally mild meningitis, which is
inflammation of the coverings of the brain)
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EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should be confident with the diagnosis of mumps orchitis and should state
this to the patient. Torsion of the testis need not be considered under the circumstances.
A sympathetic and reassuring manner is expected. The candidate should indicate that the
patient's anxiety over testicular function (fertility and sexual activity) and infectivity to his
younger child, are recognised and that possible reduction in size of the left testis is not
likely to be of any consequence to fertility.
• Pain control — paracetamol with 8 or 30 mg of codeine (for example, Panadeine®,
Panadeine Forte®).
• Steroids can be used to relieve severe pain but have no other effect on the illness. Their
use in mumps is controversial.
• Advise general measures for a febrile illness — adequate fluids, light diet, and rest, until
pain and swelling have subsided.
• Local measures — scrotal support, application of heat.
• Provide information about immunisation for mumps — live attenuated vaccine combined
with rubella and measles vaccines (MMR) is available. However, this will not immediately
protect the wife or son from patient's infectivity. Immunoglobulin is not effective. Monovalent vaccine is not available. Immunisation is advised for all children after 12 months
of age, with booster dose before going to school.
• The risk of infectivity to other adults is very low.
In counselling, the candidate should tell the patient the diagnosis, determine the patient's
knowledge of the condition including any fears he may have, discuss these and reassure
him appropriately.
KEY ISSUES
• Confidence in diagnosing mumps orchitis.
• Recognising patient anxiety about possible infertility and impotence and giving
appropriate reassurance.
• Giving an adequate explanation of the condition including the infectivity of mumps, and
its prevention by immunisation.
CRITICAL ERROR - none defined
COMMENTARY
Mumps has the following associations:
• The infecting organism is a paramyxovirus, spread by droplet infection or direct contact.
• Infectivity is 50-60% (sufferer to unimmunised person).
• Incubation period is 12-25 days (usually about 18).
• Period of infectivity is from 6 days before swelling of face occurs till 9 days after, so his
wife (if she has not had mumps) and younger son can still contract it from the father.
• One attack gives lifelong immunity.
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• Complications of mumps:
~ Common — orchitis and aseptic meningitis; and
~ Rare — encephalitis, arthritis, pancreatitis and oophoritis in females.
• Orchitis complicating mumps:
~ occurs in 20-30% of postpuberal males;
~ onset is 3-4 days after the parotitis is subsiding;
~ usually is unilateral. Subsides over one week;
~ significant atrophy of testis occurs in 50% of cases;
~ sterility is rare — only if bilateral involvement;
~ sexual performance is not affected after recovery; and
~ mumps orchitis does not predispose to testicular malignancy.
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Performance Guidelines
Condition 009
Contraceptive advice for a 24-year-old woman
AIMS OF STATION
To assess the candidate's ability to appropriately assess and advise a patient requesting
oral contraception.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are aged 24 years, work as a secretary and live alone, but have a steady boyfriend.
You have never been pregnant and have no history of gynaecologic or medical problems.
You have been in a stable monogamous sexual relationship with your boyfriend for the past
12 months, using barrier contraception with condoms.
In response to specific questions, the following list of responses is likely to cover most
questions:
• You have no previous deep vein thrombosis, active liver disease, breast cancer or
abnormal bleeding. Periods have always been irregular, occurring every 2-3 months, but
are otherwise normal.
• Blood pressure has always been normal.
• You have no history of migraine.
• You are not on any medications, do not smoke and only drink alcohol occasionally.
Examination findings to be given by the examiner after the history are basically
normal, but the candidate is expected to ask specifically for the important
relevant findings:
• Blood Pressure
120/80 mmHg
• Pelvic and abdominal examination no abnormality.
• Pap smear
normal six months ago.
• Breast examination
normal. No hirsutes.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should convey the substance of what follows to the patient:
A patient wishing to take the oral contraceptive pill (OCP) requires the following assessments:
• Exclude absolute contraindications on history. Need to exclude deep venous thrombosis,
oestrogen-dependent malignancies particularly breast cancer, active liver disease or
previous cholestatic jaundice, unexplained vaginal bleeding and focal migraines.
• Check for relative contraindications to see whether the therapy can be justified. A wide
variety of relative contraindications has been described including hypertension, cigarette
smoking, diabetes, and very irregular cycles or oligomenorrhoea.
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• Choice of pill:
~ Choose a low monophasic dose oestrogen pill (such as Microgynon 30®). This has
a low breakthrough bleeding and low failure rate. It is also less costly than
Microgynon 20®. Because her cycles are irregular (oligomenorrhoea) it is probably
better to choose a triphasic preparation such as Triphasil® or Triquilar® as these have
less post-pill amenorrhoea associated than a monophasic constant dose pill.
- If she had been an epileptic or on an antituberculous drug, a 50 ug
oestrogen-containing pill such as Microgynon 50® should have been chosen. This is
because these drugs increase liver enzyme activity, resulting in an increased
metabolism of the hormones administered in the OCR
~ If she had been hirsute, or with acne (consistent with polycystic ovarian syndrome)
an oestrogen-dominant pill such as Ovulen 0.5/50®, or (probably more appropriate)
Diane 35® if the patient can afford it, should have been advised.
~ If she was still breastfeeding, or previous oestrogen-containing pills have produced
problems or she has had a previous thrombosis, a low dose progestogen pill should
have been chosen and a failure rate of 3% accepted.
• In this instance, a low-dose oestrogen or triphasic pill would have been appropriate.
• Need for followup in about three months. This is required to check the blood pressure
and to advise her as to whether the pill prescribed needs to be changed because of
persistent problems such as break-through bleeding.
• Patient starts in red sector at time of next period. Contraceptive efficacy is satisfactory
after seven hormone tablets have been taken.
• Explain about breakthrough bleeding, missed pills and diarrhoea and the appropriate
management of these: take the normal dose the following day, and take appropriate
additional precautions depending on circumstances.
• Common side effects — breakthrough bleeding for first three months, sore breasts in the
first 1-2 cycles.
[ KEY ISSUES
• Ability to take an adequate history to exclude absolute contraindications to the OCP and
facts that would influence the pill chosen, and its dose.
• Ability to advise a patient as to how to take the pill, the timing of its effectiveness and the
likely problems during its use.
CRITICAL ERROR
Failure to exclude absolute contraindications to OCP use.
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COMMENTARY
A young woman needs to be fully informed of all the benefits and side effects and risks of
taking the OCR She also needs to be carefully assessed to ensure that she has no
condition making her unsuitable to take the pill. Any patient prescribed the OCP must have a
full explanation of how to commence taking the pill, when it becomes effective as a
contraceptive, and what to do if a pill is missed accidentally.
As part of the assessment of a patient who is to be prescribed the OCR the type of pill and
its cost, should be taken into account as part of the advice to the patient.
Having excluded absolute and relative contraindications to use of the OCP (as is the case
in this patient), an appropriate low dose oestrogen pill should be advised with a low
breakthrough bleeding rate and low failure rate.
Alternatively a triphasic preparation could be used which has less post-pill amenorrhoea.
Appropriate advice along the above lines is required.
Common problems likely with candidate performance are:
• failing to advise patients as to when contraception will be achieved following the
commencement of therapy;
• what to do if a pill is missed or the patient gets diarrhoea; and
• failing to advise the common side effects.
089
Condition 010
Rape of a 20-year-old woman
AIMS OF STATION
To assess the candidate's ability to appropriately assess and manage a woman who gives
a history of having recently been raped.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient to respond as follows:
•
•
•
•
menses are regular and normal and your last menstrual period started ten days ago.
you have not been taking or using any contraceptive agents.
you have had no previous operations, illnesses or pregnancies.
the rape followed a threat of severe injury if you did not comply. No bleeding followed
rape. He did ejaculate into the vagina.
• you have been sexually active in the past, but not for the last six months. No previous
known pelvic infections.
• you have no allergies to drugs or chemicals.
• you do not use drugs of addiction, and are not on any medications at present.
Questions patient to ask unless already covered (candidate's expected responses as
outlined in expectations of candidate performance):
• 'Has he caused me any harm?'
• 'Will I be able to have children when I want to?'
• 'Do I need any treatment now?'
Initial examination findings to be given to the candidate by the examiner on request:
• general examination: no evidence of bruising or trauma;
• vulva: looks normal — not bruised and not bleeding; and
• speculum examination and PV have not yet been done. The candidate should now
discuss these with patient, and advise on management plan.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The history should have:
• determined the date of her last menstrual period; and
• noted that she was not on the contraceptive pill.
The candidate should advise the patient along the following lines:
• Explanation as to what examination is required and why. Speculum examination is
required to check that there are no lacerations in the vagina, to take swabs to exclude
infections as indicated below and to collect a specimen for pathologic analysis.
• The need to exclude sexually transmissible infections and get a baseline blood sample
for HIV and syphilis. A cervical smear and culture should be done for gonococcus and
Chlamydia (or urine can be collected for polymerase chain reaction [PCR] analysis to
exclude Chlamydia). Penicillin (or azithromycin) and doxycycline should be given
prophylactically.
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• The need to prevent pregnancy. As she is in the late follicular phase of the cycle, the
Yuzpe method of the oral contraceptive pill (two doses of two tablets given twelve
hours apart with associated metoclopramide [Maxolon®], or high dose levonorgestrel
[Postinor®]), should be given.
• The need to review patient in three weeks to check whether she has conceived, and to
review test results and decide if any need to be repeated. Screening for syphilis and HIV
will need to be repeated in 1-3 months time. By that time, reassurance about subsequent pregnancy should be possible.
• The need to collect a specimen from the vagina to see if spermatozoa are present and
keep the specimen for DNA analysis later. For legal purposes, there would need to be a
strict 'chain of security and continuity' of handling the specimen if the results are to be
admissible in court.
• Offer referral for rape crisis counselling with the rape crisis team or medical social
worker.
• If the candidate prefers to refer the patient to a doctor in a rape crisis centre immediately,
a summary as above must be given, indicating what action would be expected from the
staff at the rape crisis centre.
KEY ISSUES
• Ability to assess a patient who has recently been raped.
• Ability to arrange the appropriate followup investigations and care.
CRITICAL ERRORS
• Failure to consider need for post-rape contraceptive methods and management.
• Failure to refer to appropriate clinic or to discuss taking appropriate swab to exclude
sexually transmissible infections (STI) and taking specimen for DNA analysis.
• Failure to consider use of prophylactic antibiotics to prevent pelvic inflammation with
an STI.
COMMENTARY
This patient will need to be treated with great empathy and support. As she does not wish
to involve the police at this stage, there may be no indication to collect forensic specimens,
but it would be appropriate to preserve any specimens collected in case she changes this
decision. She needs a full explanation as to the reasons for your examination (to exclude
trauma and STI), and she may well need the support of a social worker or a rape crisis
counsellor. She needs explanation that pregnancy might occur as a result of the rape, and
that the time of the incident in her menstrual cycle should be established, as well as the
possible use of post-coital contraception to prevent conception. She should also be
counselled that a review of testing in three months time will be necessary to follow up from
the initial potential infection. Antibiotics should be given as prophylaxis against STI.
Common problems likely with candidate performance are:
• failure to review to exclude pregnancy and to arrange followup infection testing; and
• failure to arrange appropriate counselling.
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Performance Guidelines
Condition 011
Cancer of the colon in a 60-year-old man
AIMS OF STATION
To assess the candidate's ability to counsel an anxious patient, recently diagnosed with colon
cancer. Knowledge of the clinical presentation and natural history of carcinoma of the colon is
required, including the clinical features of left colon carcinoma, and the necessity for urgent
operation should acute bowel obstruction occur, in which case, a temporary colostomy may be
performed.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
Your father died from bowel cancer in his late sixties. You were advised about followup periodic
colonoscopy, but as you had no symptoms, you did not attend for further studies after the first
one five years ago, which you were told was clear.
You recently attended for a further screening colonoscopy at your wife's insistence. You have
had no bowel symptoms, and no general symptoms. You were shocked and upset when told by
the gastroenterologist that a bowel lesion suspicious of cancer had been found, and that the
biopsy confirmed that cancer was present. You have been advised that referral for early surgery
is required, but you dread this prospect.
Now that the implications of the positive diagnosis have sunk in, you wish to discuss matters with
your general practitioner to check what is likely to occur if you continue to refuse surgery,
whether any other treatment is possible, and the likelihood of a colostomy being required.
Opening statement
' What will happen if I don't have surgery?'
Questions to ask unless already covered:
•
'What are the prospects of cure if I have the operation?1
•
‘Is any other treatment apart from surgery possible '
•
'Would I need a colostomy like my father had?'
9
At the conclusion of the interview if your concerns have been addressed adequately, thank the
doctor and ask him to arrange surgical referral.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate would be expected to know the natural history and clinical presentations of left
sided colon cancer as outlined in the commentary, and to address the patient's concerns
appropriately.
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KEY ISSUES
• Discussion of natural history of left sided colon cancer if not treated.
• The candidate is expected to know:
~ that urgent operation is necessary if acute large bowel obstruction with caecal
distension ensues; and
~ the general principles of surgical management for a rectosigmoid cancer.
CRITICAL ERRORS
• Failure to counsel patient on natural history of untreated colon cancer.
• Failure to advise need for urgent operation in the event of acute obstruction.
COMMENTARY
If surgery is not performed the tumour may become evident due to bleeding, bowel obstruction
or tumour spread.
Carcinoma of the left colon may present with the passage of red blood mixed with the stools (or
even bleeding apart from defaecation), increasing constipation, or alternating constipation and
spurious diarrhoea. If obstruction develops, subumbilical central pain ensues with persisting
constipation. If acute complete obstruction ensues in the presence of a competent ileocaecal
valve, then distension will follow with increasing pain. The risk of rupture of the caecum means
urgent operation is essential to decompress the bowel from the 'closed loop' obstruction.
Nasogastric tube suction and intravenous fluid replacement alone is incorrect management. A
colostomy may need to accompany emergency surgery at the surgeon's discretion, but would
usually be temporary unless operation revealed extensive unexpected tumour spread.
CONDITION 011. FIGURE 2.
CONDITION 011. FIGURE 3.
Bowel obstruction — gross caecal distension Metastatic carcinoma liver
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Cancers commonly arise in premalignant adenomatous polyps. The likelihood of malignant
change increases with increasing polyp size.
Spread of the tumour occurs by direct invasion through the bowel wall, which can be followed by
malignant ascites and peritoneal metastases.
Lymphatic spread in left colonic cancer, which significantly worsens prognosis, is via epicolic,
paracolic and preaortic nodes.
Blood spread occurs via the portal system to the liver and beyond. The prognosis after resection
of colon carcinoma relates directly to the degree of spread of the carcinoma as indicated in
Dukes classification:
•
Stage A: carcinoma confined to the mucosa, over 95% five year survival;
•
Stage B: carcinoma involves the muscle of the colonic wall, 75-80% five year survival:
•
Stage C: lymph node involvement, 50% five year survival; and
•
Stage D: spread into the peritoneal cavity or by blood spread to the liver and beyond,
25-35% five year survival.
Elective surgery on confirmation of diagnosis offers the best prospect of cure, and colostomy is
not usually required. If a colostomy is performed under conditions of elective surgery, it would
normally only be temporary.
In low left sided colonic cancer, adjuvant chemotherapy has been shown to improve survival in
selected cases.
Preoperative investigations normally check for general fitness for anaesthesia, absence of
anaemia and normal renal function. Abdominal imaging by computed tomography (CT) can
provide information regarding intra-abdominal spread as an aid to whether curative resection is
likely to be possible, and should be advised in this concerned patient to facilitate informed
consent for surgery.
Perioperative prophylactic antibiotics can minimise infective complications of surgery.
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Performance
Condition 012
Thalassaemia minor in a 22-year-old woman
AIMS OF STATION
To assess the candidate's knowledge of the Mendelian inheritance of / β -Thalassaemia minor, its
management, and the candidate's counselling skills in dealing with a sensitive issue involving her prospective
spouse.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
The doctor will discuss the results of the tests and will explain to you the implications of you being a carrier of
the condition of / β -Thalassaemia. You should be reassured that the condition is not serious to your own
health, but there are inheritance implications which will depend on your fiance's genetic status. If the doctor
does not suggest testing your fiance, ask:
• Will this have any effects on our children?'
• Should my fiance have any test done?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
Candidates are expected to know that Thalassaemia is a recessive inherited trait so that the heterozygous
(carrier) state gives Thalassaemia minor, whilst the homozygous state results in Thalassaemia major.
•
Approach to patient:
~ This scenario deals with a sensitive issue, namely that if the patient's fiance is also a carrier, future
children may be affected, with a significant risk of / β -Thalassaemia major.
~ Minimisation of anxiety by careful explanation, a supportive attitude and with guarded reassurance about
present day management is expected.
•
Interpretation of investigations:
The characteristics of / β -Thalassaemia minor include:
~ FBE — a symptomless hypochromic microcytic anaemia (rarely below 100 g/L) with decreased mean
corpuscular volume (MCV) and usually normal red blood cell count (RBC);
~ diagnosis needs confirmation by serum electrophoresis (elevated Hb A2); and
~ the anaemia does not respond to any form of iron therapy, unless the patient happens also to be
iron-deficient, which is very rare.
•
Initial management plan:
~ Reassure the patient regarding the effect on her health. Iron therapy is not indicated. Oral folic acid of 1 mg
per day will more than meet the requirements of the mildly increased red cell turnover.
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Performance Guidelines
~ The candidate should offer to see her fiance to arrange appropriate testing, advise that the fiance
consults his own doctor, and offer to refer the couple to a geneticist or haematologist. Suggest also that
her brother should seek advice in regard to testing for the trait. If the fiance is not a carrier there is no
immediate problem, although the couple should be advised to inform their children of the situation at an
appropriate time, including how the carrier state is diagnosed.
~ This problem cannot be resolved at this consultation.
Followup with patient and also fiance (if possible) is required after results of fiance's genetic status are known.
• Patient counselling/education:
The candidate should counsel regarding the following issues:
~ Thalassaemia minor is a recessive inherited trait ('carrier' state).
~ Nature of this condition and possible consequences if conjugal partner also carries the trait.
~ Information about β -Thalassaemia major and risks of its occurrence in offspring if both partners are
carriers. Availability of antenatal diagnosis and management of pregnancy (including termination) if
fetus is shown to have β -Thalassaemia major.
•
Patient counselling regarding inheritance implications.
•
Initial management plan.
•
Failure to advise that the prospective spouse should be investigated for carrier state.
•
Failure to understand principles of Mendelian recessive inheritance.
Thalassaemia is a common anaemia in certain areas of the world, including the Mediterranean region, India,
Southeast Asia and Africa. In Australia, there is a high prevalence of this condition in individuals descended
from these regions. At the molecular level, there are hundreds of globin abnormalities leading to either
alpha-chain or beta-chain underproduction. The underproduction of either alpha or beta chains results in a
microcytic red blood cell. There is also haemolysis because the imbalance results in excess globin chains,
which are oxidised and result in premature red blood cell removal in the spleen. β -Thalassaemia major is a
rare, but very serious, congenital anaemia requiring lifelong transfusional support and patients with this
condition also need treatment to avoid complications of iron overload related to the frequent transfusions.
There is a markedly reduced life expectancy with devastating consequences for both the child and family.
The most important points being assessed are:
•
Knowledge of Mendelian inheritance (what is a recessive inherited trait and what are its implications?).
•
Meaning of
~ heterozygous inheritance: results in β -Thalassaemia minor; and
~ homozygous inheritance: results in B-Thalassaemia major.
•
Advise that fiance be tested for β-Thalassaemia minor
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Performance Guidelines
The pattern of inheritance is as illustrated. She has the carrier state /J-Thalassaemia minor.
• If fiance is negative for β -Thalassaemia minor;
Either sex can be carriers. Half the children of either sex will be carriers (β -Thalassaemia minor).
None should have β -Thalassaemia major.
• If fiance is positive for β-Thalassaemia minor:
Half the children of either sex will be carriers. One in four children will have β -Thalassaemia major, which affects
children of either sex.
• Management
If the haemoglobin test for β -Thalassaemia minor in the fiance is negative:
~ No further action or tests are required.
~ Explanation of carrier state is required (can affect male or female children) — each offspring will have an equal
chance of being carrier or noncarrier (normal).
~ If the fiance has a positive test for β -Thalassaemia minor, they will need counselling about risks to fetus which
are 1:4 for β -Thalassaemia major (25%) and 1:2 for β -Thalassaemia minor (50% — carrier status).
The diagnosis of β -Thalassaemia major can be made by in utero genetic sampling at 12-14 weeks. If both partners
are carriers there is no cause for undue alarm because of increased awareness, diagnostic certainty, known risks and
availability of antenatal diagnosis and safe termination procedures (unless this is not an acceptable option).
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Performance Guidelines
Beta-Thalassaemia is a condition involving the beta ( β ) chains, with both homozygous and
heterozygous states being compatible with survival to term but with major differences in outlook.
Heterozygous alpha-Thalassaemia (which involves the alpha ( a ) chains) is also compatible with
survival; however the homozygous state of alpha-Thalassaemia results in fetal hydrops and
death-in-utero.
CONDITION 012. FIGURE 3.
β -Thalassaemia major: the slide shows microcytosis,
anisocytosls, hypochromia, a normoblast and target cells
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Performance Guidelines
Condition 013
Pre-pregnancy advice to a 28-year-old woman with previous
thromboembolism
AIMS OF STATION
To assess the candidate's ability to advise a patient of the appropriate management she should
receive during her next pregnancy, when the last one was complicated by a pulmonary
embolus during the puerperium.
Because of her previous deep venous thrombosis (DVT) and pulmonary embolus, she is at
increased risk (probably at least 20%) of a repeat thrombosis in her next pregnancy.
The examiner will have instructed the patient to respond as follows:
• Previous DVT and pulmonary embolus: your pulmonary embolus occurred on day three
after the birth. After this DVT in the right pelvic veins was diagnosed when the doctor
performed a venogram.
• You were treated with intravenous heparin for two weeks, in full dosage, followed by full
dose warfarin therapy for six months.
• You have now been off all treatment for 12 months.
• Contraception: you are using condoms. You had previously been on the contraceptive pill
prior to the first pregnancy without problems.
• You have had no previous DVT or pulmonary embolus apart from as outlined in the previous
pregnancy.
• You have had no trauma or operations on legs or pelvis.
• There is no shortness of breath currently.
• There are no varicose veins, but you do have occasional ankle oedema on the right side
(the side of the previous thrombosis).
• Your previous delivery was a spontaneous vaginal delivery of a live male infant weighing
3550 grams. A small episiotomy was cut to facilitate delivery. You did not breastfeed.
• You have no family history of any clotting problems or thromboses.
• During the last pregnancy, you were shown to be rubella-immune and took folic acid from
before pregnancy and for the first 16 weeks.
Questions to ask unless already covered:
• Will I get another deep vein thrombosis and pulmonary embolus?'
• 'Do I need anticoagulant treatment during the next pregnancy? If so, what?'
• ‘Is there any risk from anticoagulant treatment during pregnancy to my baby or me?'
Investigation results
No investigations have been done since you ceased warfarin therapy and none had been done
prior to commencing anticoagulants after the pulmonary embolism.
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EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should provide the substance of the following information in lay terms:
•
The pregnancy should be managed in consultation with a consultant physician or
haematologist and an obstetrician.
•
There is a need to screen her for a clotting propensity (thrombophilia) prior to her becoming
pregnant (tests should include the measurement of anticardiolipin antibody, lupus
anticoagulant, protein S, protein C, anti-thrombin 3, and factor V Leidin — these tests will
screen for both inherited and acguired thrombophilias). If a thrombophilia is identified,
anticoagulant therapy throughout the pregnancy and the puerperium should be advised.
•
Even if there is no underlying problem discovered, she should still be treated with
anticoagulants at least during the puerperium, and it is safer to treat her throughout the
pregnancy. The treatment should therefore probably be started at about 14 weeks of
gestation and continued until at least 4-6 weeks postpartum.
•
Optimal anticoagulant therapy is best given as subcutaneous low dose heparin in a dosage of
7500 units twice daily, or with a low molecular weight heparin such as enoxaparin, in a dose
of 20-40 mg 12 hourly (in the past it would have been common for heparin to be changed to
warfarin, in full dosage, between 16 weeks and 36 weeks, and then from one week
postpartum). Treatment with warfarin, however, has problems such as a 5% risk of
teratogenesis when given in the first trimester and an increase in miscarriage rate, fetal and
maternal haemorrhage, neurologic problems in the baby and stillbirth. For all of these
reasons, warfarin is not used during pregnancy, although it is commonly used if treatment is
continued postpartum.
•
Avoid prolonged immobilisation during pregnancy, and consider using compression stockings
by day throughout the pregnancy.
•
Deliver in a controlled manner at about 38-39 weeks of gestation, rather than allowing a
spontaneous labour to occur in someone who has just had her dose of heparin. Although the
heparin dose is not full dosage, and unlikely to affect clotting tests, it is best to arrange
induction at a time when the morning dose of heparin can be withheld, with the treatment
being reinstituted after delivery.
•
Take her folic acid therapy as on the previous occasion.
•
Ability to recognise that she is at increased risk of a recurrent thrombosis in her next
pregnancy and requires at least low dose heparin during the puerperium if not for most of the
antenatal period as well.
•
Recognition of relative risks and indications for heparin and warfarin therapy.
•
Recognition of significant risks of warfarin during pregnancy.
•
Failure to screen for an inherited or acquired coagulation disorder.
•
Failure to advise anticoagulant therapy at least for 4-6 weeks postpartum in the next
pregnancy.
•
Advising warfarin therapy throughout pregnancy.
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Guidelines
COMMENTARY
This young woman has survived a life-threatening pulmonary embolus in a previous
pregnancy. She must receive treatment to prevent a similar episode occurring in her next
pregnancy. It is essential to exclude any acquired or inherited coagulation disorder. However,
in any event, she will need anticoagulant therapy for the majority of her next pregnancy. The
benefits of heparin must be carefully explained, as opposed to the risks of warfarin in
pregnancy. It is also important that the anticoagulant therapy be continued beyond the birth of
her infant for at least 4-6 weeks.
Common problems likely with candidate performance are:
• failure to enquire about the particulars of the previous thrombosis/pulmonary embolism.
• suggesting that warfarin therapy should be given throughout the pregnancy, which can be
teratogenic if given in the first trimester, and is impossible to reverse quickly in the late third
trimester when labour is likely to occur
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Performance Guidelines
Condition 014
Pre-pregnancy advice to a 24-year-old woman with
Type 1 diabetes mellitus
AIMS OF STATION
To assess the candidate's ability to counsel a nulliparous diabetic woman about the effects of her
diabetes on a future pregnancy, the effect of future pregnancies on her diabetes, and the actions
she should take to minimise the risk of potential problems.
The examiner will instruct the patient to reply, as indicated below, when her history is being taken by
the candidate.
•
Your diabetes was diagnosed at the age of 9 years (that is, 15 years ago).
•
Your diabetes has been well controlled on insulin and is currently very well controlled on long-acting
insulin given twice daily.
•
Your last review by the diabetic physician was 12 months ago. You manage your own insulin
dosages and test blood sugar levels three times a day. Generally you are able to keep the blood
sugar levels at 6-8 mmol/L.
•
You have not been troubled with urinary infections or vaginal infections.
•
Your vision has been good and kidney function has been normal.
•
You have never had a hyperglycaemic coma, but occasionally have hypoglycaemic episodes.
•
You have not had any of the other pre-pregnancy blood tests done, such as rubella antibodies, full
blood examination (FBE), blood group, indirect Coombs test or syphilis serology.
Questions to ask if not already covered:
•
'Will I be able to have a baby?'
•
‘Will my baby be OK?'
•
‘Will the pregnancy adversely affect my diabetes?'
•
'How does the diabetes affect my pregnancy?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
In general, the candidate needs to advise her of the need to have very good blood sugar control prior to
conception and during the pregnancy, that the pre-pregnancy counselling applicable to all pregnant
women is also applicable to her, that the risk of certain pregnancy complications are increased, that the
baby is also at increased risk, and that delivery at 38 weeks or sometimes earlier will probably be
required.
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Specific advice to the patient
The candidate should explain that:
• Pre-pregnancy counselling must take the form of assessment of her diabetic control and looking for any evidence
of effects of the diabetes on target organs. Her haemoglobin A1C (HbA1c) should therefore be measured and her
blood glucose assessments reviewed to ensure they are satisfactory. It is particularly important to keep the blood
glucose levels within the range of 5-7 mmol/L during the first trimester to reduce the risk of fetal malformation to an
absolute minimum, and during the remainder of the pregnancy to reduce the fetal and maternal complications
(particularly macrosomia and unexplained fetal death).
• Referral to her diabetic physician to check her general state is mandatory, with assessment for peripheral
neuropathy, renal function (renal function tests and 24 hour urinary protein), and a check of her optic fundi by her
ophthalmologist.
• Providing all of these are normal, she could be advised to attempt to become pregnant, and commence folic acid
in a dosage of 0.5-1 mg per day from the time pregnancy is attempted until at least mid-gestation.
• In addition, the routine tests which would normally be performed at the first antenatal visit are better performed
prior to pregnancy. These tests should include blood group and indirect Coombs test, full blood examination
(FBE), hepatitis screening, Venereal Disease Research Laboratory Test (VDRL). rubella serology, and midstream
urine specimen to exclude urinary infection. If a Pap smear has not been performed in the last two years, this
should also be performed. Any abnormalities found in these tests should be addressed prior to the pregnancy.
• She should also be advised about the care which is likely to be required during pregnancy as follows:
~ Referral to a consultant obstetrician who will manage her in conjunction with a diabetic physician.
~ Her insulin requirement will markedly increase and she will need to keep her blood sugars between 5-7 mmol/L
to keep the fetal malformation rate to a minimum, and the macrosomia (large fetal size) rate to an acceptable
level.
~ The insulin requirement after delivery usually returns to pre-pregnancy requirements within 24 hours of delivery,
~ Ultrasound examination should be performed at 12 and 18 weeks looking for fetal abnormalities, and at 32
weeks looking for macrosomia.
~ Iron and folic acid therapy should be continued throughout the pregnancy.
~ In general, even where the diabetes is well controlled, delivery should be planned for 38-40 weeks in someone
who has had diabetes for 15 years and is on insulin therapy. Earlier delivery might be necessary if problems
occur during the pregnancy.
~ Despite adequate monitoring and care during pregnancy, the pregnancy is more likely to be complicated by
pre-eclampsia, polyhydramnios and macrosomia of the fetus. There is also an increased risk of unexplained
fetal death-in-utero late in pregnancy and of respiratory distress in the baby after delivery. All of these matters
need to be raised with the patient prior to pregnancy, so that she can make an informed decision as to whether
she wishes to proceed.
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KEY ISSUES
• Ability of the candidate to counsel a diabetic woman, prior to a pregnancy, about the care she will require and the
methods of keeping the complication rate to herself and her fetus to a minimum.
•
Failure to ensure the patient is aware that her diabetic control prior to pregnancy should be good to ensure the
risk of fetal abnormality is kept as low as possible.
•
Failure to do pre-pregnancy blood tests (haemoglobin estimation, blood group, rubella antibodies and tests as
above) and failure to recommend pre-pregnancy and early pregnancy folic acid therapy (routine pre-pregnancy
counselling).
The most important aspect of managing pregnancy in an established insulin-dependent (Type 1) diabetic is that the
pregnancy must be managed in consultation with a physician specialising in diabetes and a specialist obstetrician.
The most important advice that the patient should receive is that pre-pregnancy and pregnancy control of blood sugar
levels is essential for an optimum outcome of the pregnancy.
Common problems likely with candidate performance are:
•
inability to advise the patient adequately concerning the special problems seen in pregnancy that can affect
either the baby or the mother;
•
lack of knowledge that good blood-sugar controi reduces the risk of unexplained fetal death-in-utero and fetal
macrosomia;
•
lack of knowledge that the insulin dose required will usually increase dramatically during the pregnancy, but fall
back to pre-pregnancy requirements within 24 hours of delivery; and
•
failing to suggest that the pregnancy should be managed in consultation with a diabetic physician and a specialist
obstetrician.
015
Performance Guidelines
Condition 015
An anencephalic fetus diagnosed at 18 weeks gestation in a 25-year-old
primigravida
AIMS OF STATION
To assess the candidate's ability to appropriately counsel a patient found to have an
anencephalic fetus at the time of an ultrasound examination at 18 weeks of gestation.
The examiner will have instructed the patient as follows:
This is your first pregnancy at 18 weeks. You are seeing the doctor to discuss your recent ultrasound
test. Screening blood tests two weeks ago raised concerns about the fetal condition.
The list of appropriate answers below is likely to cover most of the doctor's questions:
• if asked about your periods, indicate they had been normal prior to the pregnancy;
• you did not take any folic acid in early pregnancy;
• no family history of neural tube defect (spina bifida,) in pregnancy;
• if after explaining the diagnosis, the candidate explains termination of the pregnancy as an
appropriate action, or asks you what you would prefer, answer: ‘I do not wish to continue with the
pregnancy if this can be arranged';
• your blood group is O positive, indirect Coombs test negative; and
• there is no history of asthma or other contraindication to prostaglandin therapy.
Opening statement
‘Is there anything wrong with my baby?'
Questions to ask if not already covered:
• 'Can I have the pregnancy terminated?' — Ask only if the candidate informs you of the diagnosis
but doesn't mention termination of the pregnancy being an option.
• ‘Is this problem likely to occur again in a subsequent pregnancy?'
• 'How can I prevent the problem from occurring again?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
Diagnosi
Fetal anencephaly is a developmental defect of the brain which occurs somewhere between
five and eight weeks of gestation. In this patient, the condition has been diagnosed
unequivocally at the 18 week ultrasound as illustrated. The condition is always fatal soon after
birth. The patient has the option to terminate the pregnancy forthwith, or continue until labour
occurs. If the latter is chosen, and if hydramnios occurs, the labour is likely to be premature,
otherwise labour post-term is common.
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Performance Guidelines
Advice expected to be given to the patient:
•
The information concerning anencephaly should be given as indicated above.
•
As the patient has indicated she should wish to have the pregnancy terminated, this needs to
be discussed. Termination of the pregnancy could be performed by using prostaglandins, or
by the surgical procedure of dilatation and evacuation. This latter procedure has the
advantage of being performed under general anaesthetic with the procedure being over
when the patient wakes up. This procedure is quite difficult except in expert hands, and
cervical damage resulting in subsequent cervical incompetence in any subsequent
pregnancy may result when the procedure is done after 16 weeks ol gestation.
•
Prostaglandin termination may take several hours — or even days — and results in uterine
contractions similar to those experienced in labour, followed by vaginal delivery of the fetus.
There is also a possible need for curettage to remove any retained placental fragments.
•
Post-mortem examination should be performed on the fetus to check that no other
abnormality is present that might influence the advice given concerning the successor
otherwise of any subsequent pregnancy.
•
The risk of recurrence of a neural tube defect (NTD) such as anencephaly, or spina bifida, is
somewhere between 2% and 5%. Folic acid administration (in a dosage of 5 mg per day)
should be commenced prior to conception and continued until about 12 weeks of gestation,
as this has been shown to reduce the risk of a neural tube defect Ultrasound examination in a
subsequent pregnancy is imperative.
•
Maternal serum alpha fetoprotein assessment is also useful as a screening test and should
be performed at about 16 weeks of gestation in any subsequent pregnancy.
Ability to advise the mother:
•
empathically of the fact that her baby has a lethal abnormality;
•
of the appropriate options regarding her further care in this pregnancy; and
•
of the methods available to reduce the recurrence risk of this abnormality
Failure to:
•
recognise and advise the patient that this is a lethal abnormality to the baby: or
•
determine the preferences of the mother in respect to termination of pregnancy; or
•
counsel the patient appropriately concerning management in a subsequent pregnancy.
The most important aspect of managing this case is to understand the anxiety and
disappointment of the mother. She will need considerable support and understanding when
discussing the abnormality with her and the management of the termination of the pregnancy
that she has requested. While helping her to deal with the extreme disappointment of the
outcome of this pregnancy, the candidate should be positive in terms of prevention (folic acid)
and screening tests in a subsequent pregnancy.
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Guidelines
Common problems with candidate performance are:
• Not focusing enough on the actual problem when taking the history, but asking for information
such as the date of the last menstrual period, irrelevant past history, social history etc. This
just takes time to do and reduces the time available for the remaining tasks.
• Advising the patient that a suction curette would be the preferred method of termination. This
is not the case at 18 weeks of gestation, although it would be appropriate for a pregnancy
termination being performed at less than 15 weeks of gestation.
• Advising that maternal serum screening at 11-12 weeks gestation in the next pregnancy
would be appropriate to exclude another NTD. This test would be appropriate to assess the
likelihood of a chromosome abnormality but an alpha-fetoprotein assessment at 15-16 weeks
gestation is also necessary for recognition of a likely NTD. Earlier ultrasound examination, at
11-12 weeks of gestation, may allow a diagnosis of anencephaly to be made, but would not
exclude spina bifida. An understanding of the recent methods and timing of genetic screening
in early pregnancy is required.
CONDITION 015. FIGURE 2.
Ultrasound showing anencephalic fetus
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Performance Guidelines
Condition 016
A duodenal ulcer found on endoscopy in a 65-year-old man
A I M S OF STATION
To assess the candidate's ability to counsel a patient on the aetiology and complications duodenal peptic
ulceration and the principles of management.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a retired bank clerk. You have had dyspepsia (epigastric pain after meals) for abo six weeks. Your
general health has been reasonably good apart from some rec generalised aches and pains in your joints.
You have been taking Nurofen"1 table (ibuprofen), which you obtained from the pharmacist, which have not
given much relief, i do not smoke or drink alcohol.
Questions to ask if not already covered by doctor:
•
'Why have I developed the ulcer?'
•
‘Is it contagious? Can my family members be affected?'
•
‘'What treatment do I need to get rid of this duodenal ulcer?'
•
‘'Would those NuroferP tablets have anything to do with this?'
•
‘Is it likely to come back once it has healed? If so, can this relapse be prevented?'
•
‘Is the ulcer cancerous?'
•
'’Would surgical treatment ever be required?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should explain that:
•
The majority of duodenal ulcers are a consequence of mucosal damage caused Helicobacter pylori and
gastric hydrochloric acid. The relationship of H. pylori a gastric acid to gastric ulcer is less definite.
Non-steroidal antiinflammatory dru (NSAIDs) commonly contribute to peptic ulcer formation.
Management of peptic ulc depends on the underlying cause. For Helicobacter pylori-related ulcers,
triple ther (usually a proton pump inhibitor and two antibiotics) will heal more than 90% of ulc within one
week of starting treatment and, provided the organism is eradicated (u breath test at six weeks), the
chance of ulcer recurrence is low. For NSAID-relat ulcers, the patient will only require acid suppression
to achieve ulcer healing.
•
Recommended therapy for an H. pylori-related ulcer includes a proton pump inhib' (for example,
omeprazole) plus antibiotics (clarithromycin or amoxycillin plus metr dazole given for 1-2weeks),
followed by continued antisecretory therapy foruptoat of 4-8 weeks.
•
Cessation of potential aggravating factors such as NSAID use and smoking is important. Whilst tobacco
and alcohol may hinder the healing of ulcers, they d o n ’ t contribute to the development of the ulcer. The
patient should replace ibuprofen alternative analgesia such as paracetamol. The bacterial infection is
not highly contagious to other family members.
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• Peptic ulcers are common, more so in men. About 70% are related to H. pylori. Left untreated, most ulcers
will spontaneously heal, but relapse, often after several months. Thus peptic ulcer disease can be a lifelong
problem, with about 10% of patients developing complications (bleeding, perforation or gastric outlet
obstruction).
• Most patients can be managed with medical therapy and without surgery. Complications of peptic
ulceration, which require surgical intervention, include perforation, gastric outflow obstruction and severe
persistent bleeding. Malignancy occurring in a chronic peptic ulcer is uncommon (1-2% in gastric ulcer) but
would need examination and monitoring to ensure permanent healing. Haemorrhage from peptic ulcers
produces haematemesis and/or melaena. Bleeding is usually self limiting, but more likely to persist in older
patients with arterial medial sclerosis. In these patients, endoscopic haemostasis using a heater probe or
injection of adrenaline, is often successful in preventing further bleeding. Surgery is indicated when
excessive or persistent bleeding occurs and should be considered when blood loss exceeds 3000 mL.
However, each patient should be evaluated individually.
• Knowledge of the usual medical therapy and risk factors for patients with peptic duodenal ulceration.
• Understanding that surgery is required for perforation, obstruction and for patients with severe, persistent
bleeding or intractable pain.
With the advent of the proton pump inhibitors and the identification of the pathogen Helicobacter pylori, the
• Informing the patient that the duodenal ulcer is likely to be malignant.
management of peptic ulcer disease has undergone a considerable change in the last two decades. From
being a chronic, indolent problem, frequently requiring surgical intervention, peptic ulcer disease is now a
relatively benign and easily treated condition.
The mucosal lining of the stomach and duodenum is normally protected from acid-attack and autodigestion by
a layer of mucus. This layer of mucus forms an 'unstirred layer' which is constantly replaced by secretion from
the underlying cells. Bicarbonate is also secreted from the surface cells to help with mucosal defence. Both
mucus and bicarbonate secretion are modulated through the actions of prostaglandins, cyclic AMP (cAMP)
and several other agents.
There are a number of ways in which the integrity of this mucous layer can be broken. Replenishment of the
layer can be interrupted through interference with prostaglandin synthesis and reduction in bicarbonate
secretion. This is an important side effect of NSAIDs. The layer itself may be disrupted and acid allowed to
infiltrate and damage the underlying mucosa. The most common mechanism of this kind of damage is brought
about by the presence of Helicobacter pylori. To survive in the hostile acid environment, this bacteria surrounds
itself in a neutral zone, brought on by the breakdown of urea (through the enzyme urease) and formation of
ammonium ions. This change weakens the integrity of the mucous layer.
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CONDITION 016. FIGURE 2.
Helicobacter pylori associated peptic
ulceration
CONDITION 016. FIGURE 3.
Urease test on biopsy with sample
The existence of H. pylori and its role in peptic ulcer disease was only appreciated in the early 1980s, mainly
through the seminal contributions of B Marshall and R Warren from Perth, Australia, leading to their receipt of
the Nobel Prize in Medicine for 2005.
On a worldwide basis, most peptic ulcers will be related to the presence of H. pylori. Whilst the prevalence of
H. pylori is high in many communities — especially amongst those in lower socioeconomic groups — the rate
of ulcer formation is still relatively low. When a peptic ulcer is not related to the presence of H. pylori, the most
likely aetiological factor will be an NSAID. A great deal of false expectation occurred with the development of
the Cyclo-oxygenase-2 (COX-2) inhibitors (such as celecoxib), from belief that this class of compound would
be associated with a lower incidence of gastrointestinal side effects. This has not proven to be the case.
Ideally, all patients with a suspected peptic ulcer should have an endoscopy performed. The aim of the
procedure is two-fold: first, to confirm the diagnosis; and secondly, to test for the presence of H. pylori. As part
of the diagnosis, any ulcer in the stomach must be biopsied to exclude malignancy. Duodenal ulcers are not
associated with malignancy.
If H. pylori is present, part of the treatment will be to eradicate the infection. Provided this is done and the ulcer
is healed, the chance of recurrence is low. If the ulcer does recur this is probably because the patient has
become reinfected. If H. pylori is absent, the likely cause of the ulcer is an NSAID. Treatment consists of
withdrawing the NSAID and giving the patient an acid-suppressing agent for long enough for the ulcer to heal.
Treatment for 4-8 weeks will lead to H. pylori eradication and ulcer healing in over 90% of cases.
If the initial ulcer was a duodenal ulcer, success of treatment can be judged by relief of symptoms and a breath
test to check for H. pylori eradication (if the infection was present in the first place). If the cause of the problem
had been a gastric ulcer, the patient should be endoscoped again, and the ulcer biopsied again if still present.
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Performance Guidelines
Condition 017
Advice on autologous blood transfusion to a 55-year-old man awaiting elective
surgery
AIMS OF STATION
To assess the candidate's ability to explain the principles of preoperative blood collection for autologous
intraoperative transfusion.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient to ask questions of the candidate as follows (unless
the matter has already been covered):
The answers expected by the candidate are in brackets.
Opening statement:
'Are there any advantages in using my own blood it I need a transfusion?' (Specifically minimising infective and
incompatibility risks)
Questions to ask if not already covered:
• 'How long is the blood good for?' ( U p to five weeks)
• 'How much do they take?' (Up to 2 litres over a period of 2-5 weeks)
• 'Don't I need all my own blood?' (Your blood rapidly regenerates, being a renewable tissue from the bone
marrow)
• ‘'Won't it make me very weak?' (Not significantly)
• ‘'What are the advantages of my blood over blood bank blood?''(It is your own. which is fully compatible).
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should display ability to counsel about the following issues:
• The candidate is expected to explain the normal functions of bone marrow and blood, and that blood is a
renewable tissue with the main functions of oxygen transport to tissues and maintenance of circulatory
volume.
• Blood donors can give readily 10-15% of the blood volume (450 mL) and the fluid volume is rapidly replaced
within hours from the body's reserves. Replacement of the red cells starts immediately after donation and
the slight anaemia resolves within weeks as the blood cells are replaced.
• Blood can be stored safely for reuse within a few weeks (up to five weeks), so that one. two or more
donations can be collected over the weeks prior to operation. The blood units can then be stored and saved
to be used during operation as whole blood or reconstituted red cells to replace operative blood loss
requirements in operations (such as this patient is having) on large joints or blood vessels, where blood loss
can be such as to require transfusion.
• The procedure removes the risk of disease transmission (particularly by viruses) or incompatibilities and
allergies inherent in standard homologous blood transfusion from another donor.
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Performance Guidelines
•
The procedure is recommended in patients with no medical contraindications to blood
donation, who are to have a planned major elective surgical operation on a defined date some
weeks ahead at which blood losses are expected to be moderate or high.
•
The procedure of donation does not cause any increase in liability of operative problems or
complications and the modestly lowered haemoglobin level causing temporary 'thinning' of
the blood may be protective against thrombotic clotting complications such as deep venous
thrombosis, pulmonary embolism, heart attack or stroke, because the thinned blood flows
more freely.
•
The procedure would not necessarily remove all likelihood of requiring an additional
non-autologous transfusion, which will depend on volume of operative loss, but will
significantly reduce such prospects. Non-autologous/homologous blood transfusion itself is
used to save many thousands of lives each year, and although not entirely free of risk, is
rigorously supervised and a safe procedure in Australia.
•
Preoperative autologous blood collection for subsequent operative use depends on a verified
and non-cancellable time for surgery, so there is always a possibility that the blood would be
unavailable for use if the operation was inadvertently long delayed or cancelled for any
reason.
KEY ISSUES
•
Appropriate explanation of blood being a renewable tissue, thus allowing for preoperative
collection and storage including:
~ advantages of autologous over homologous blood transfusion: and
~ circumstances in which autologous transfusion may be considered.
CRITICAL ERROR
- none d e f i n e d
COMMENTARY
There are two components to the task:
•
To provide education on the transfusion of blood and blood products.
•
To explain the benefits, risks and principles of autologous blood transfusion.
In industrialised communities, blood transfusion is now extremely safe. Blood is usually collected
from volunteer donors only. In Australia there is no remuneration or any form of inducement other
than a demonstration of community spirit. All blood samples are carefully screened for important
communicable diseases, including human immunodeficiency virus (HIV), hepatitis B and C virus
(HBV, HCV) and syphilis. There will always be a risk of infection and of concern is the rare
hepatitis G virus and the prion transmission agent responsible for Creutzfeldt-Jacob disease
(CJD). Some countries will not accept donors who have come from countries where 'mad cow'
disease has been identified. Screening for HIV does not give absolute freedom from risk, as a
window period occurs after primary infection until antigen is detectable and seroconversion
occurs after several weeks.
Blood is only given to patients when strictly necessary. Donors are screened for high risk
circumstances and the donated blood tested, and the blood is grouped, screened for antibodies
and cross-matched with the potential recipient. There are strict guidelines for the administration
and monitoring of blood and any adverse events are documented and reported. Blood
transfusion is used sparingly for elective surgery and otherwise healthy patients can tolerate
haemoglobin concentrations down to 80 g/L.
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Autologous transfusion is only considered when:
•
the date of the surgical procedure can be virtually guaranteed:
•
the patient's haemoglobin concentration exceeds 110 g/L (135 g/L in women); and
•
it is likely that a substantial amount of blood will be lost during the procedure.
Concerns about the safety of blood transfusion, particularly in the 1980s about risks of transmission of HIV
infection, stimulated interest in avoiding or reducing the use of donor blood, particularly single unit transfusions
(Give blood by the gallon, not by the gill).
Several techniques can be used to avoid the need for bank blood.
Autologous blood transfusion is one such technique, which reduces the risk of transfusion of viral infection
and also of alloimmunisation and incompatibility reactions.
Stored blood at 4"C has a 'shelf-life' of up to five weeks, at which time around 70% of the red cells still survive
normally.
With pre-deposit autologous transfusion, patients can donate 2-5 units (of450mL) at approximately weekly
intervals before elective surgery. Alternatively, deliberate preoperative haemodilution can be induced by
removing one or two units immediately before surgery to be used during surgery to replace operative losses.
Collection and administration of blood for autologous transfusion is an expensive exercise. Because the donor
(the patient) is not a standard blood donor, if the blood is not used for any reason, it cannot be put into the
general donor pool and will be wasted. Starting a maximum of five weeks before the planned procedure, the
patient donates a unit (450 mL) a week and is given ferrous sulphate supplements. Another variant on
autotransfusion, as noted above, is to take off 1 L of blood immediately prior to operation, haemodiiute the
patient with crystalloid and then use the freshly removed blood as required.
Other techniques that can be used include intraoperative autotransfusion (operative
blood salvage) and erythropoietin. Blood salvage techniques to collect and retransfuse blood lost during
surgery can be employed, providing the operative site is known to be free of bacteria, intestinal content, or
tumour. Intraoperative autotransfusion can be used in major trauma and vascular surgery. As the equipment
required to run such systems is expensive, intraoperative autotransfusion does not usually make significant
dollar savings over standard banked blood.
Recombinant human erythropoietin can be used to stimulate the body's own blood reserves prior to elective
surgery. The technique can be considered for chronic renal failure patients who are anaemic and as a
blood-saving strategy in major surgery.
In Australia and UK. where blood transfusion is generally perceived as being safe, and where emergency
surgery and pressures and operating list revisions make it difficult to set definite dates of elective surgery, the
techniques of autologous transfusion are applied only in a minority of cases. This contrasts to other
communities, such as USA. where the use of autologous transfusion is more common (up to 5% in some
regions).
The future: The use of allogenic blood will always involve the need for compatibility testing. The shelf life of
allogenic blood is limited and although current techniques of blood transfusion are very safe, disease
transmission from viruses is unlikely to be completely eliminated because of false negative results during the
window period.
A clinically effective red blood cell substitute would thus be beneficial in terms of universal compatibility,
immediate availability, freedom of disease transmission, and long-term storage.
Major potential candidates are haemoglobin solutions and perfluorochemical emulsions.
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The haemoglobin molecule, the tetramer, chemically binds and carries oxygen (1 g Hb binds 1,39
ml_ 02 and is fully saturated at ambient pressure). Oxygen is unloaded from Hb in capillaries at 40
Torr.
The unmodified tetramer is potentially nephrotoxic and vasoconstrictive. Efforts to modify the
tetramer to improve safety include polymerisation and other techniques.
Continuing research into synthetic blood substitutes thus continues in an attempt to produce a
non-toxic temporary fluid combining volume replacement, and intravascular oncotic stability
equivalent to that exerted by plasma proteins with oxygen-carrying capacity. In the meantime, the
major alternative volume replacement fluids available are albumin solutions, solutions utilising
other colloids (gelatin, dextrans), and simple balanced electrolyte solutions.
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Performance Guidelines
Condition 018
Advice on stopping smoking to a 30-year-old man
AIMS OF STATION
To assess the candidate's knowledge of nicotine-dependence and the ability to obtain relevant
information to counsel the patient appropriately and to answer his questions about the
withdrawal process and treatment options.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a 30-year-old information technology specialist, employed in a State Government
Department. You are engaged to be married and have attended your general practitioner as a
followup to a recent episode of an upper respiratory infection associated with a cough.
You have been a cigarette smoker since your mid-teens and currently smoke 20 cigarettes a day
(on average). With your impending marriage, you have been considering stopping smoking. On
the previous visit to your general practitioner, the doctor had briefly suggested that you should
stop smoking for the benefit of your health.
Opening statement:
Start the interview by saying: I've been thinking about your advice last time about my smoking. I
would like to stop. What can you do to help me?'
Appear interested, engaged and genuinely motivated at this time to stop smoking Listen carefully
to the advice and information provided by the doctor, and respond appropriately. Ask questions
and seek clarification, depending on the content provided.
Questions to ask if the topic has not already been covered by the candidate:
• ‘Is it too late for me to stop? Is the damage already done?'
• 'How easy is it to stop?'
• 'Do / have to stop abruptly or can I just cut down gradually?'
• 'Do hypnotherapy or acupuncture or alternative remedies like herbs or vitamins work?'
• 'What are the risks/benefits of nicotine patches/gum or mood tablets? Are they expensive?
What are the side effects?'
• 'What should I expect by way of withdrawal symptoms?
• ’Will the treatment affect my sex life?'
• ‘Do I need to do a course or join a quit smoking group?'
• ‘Is the desire to smoke inherited? Will I pass it on to my children?'
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EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should display appropriate empathy, rapport and enthusiasm for explaining the
benefits and pitfalls of smoking cessation.
Cigarette dependence is a chronic relapsing condition which, once established, involves a long
term, even lifetime struggle to achieve abstinence. Motivation to stop in this patient should be
assessed by the candidate asking direct questions about his intentions and desire to stop (for
example, on a scale from 'not at all' to Very much'). The patient is in the preparation' stage of
behaviour change (planning to stop in the near future) and is hoping to learn 'action' strategies
that will help him succeed in overcoming his dependence on nicotine.
In order to assess how dependent the patient is on nicotine, the candidate should not only ask
about the number of cigarettes a day the patient smokes, but focus more on the pattern of
smoking during the day (smoking more in the first hours of waking is more significant and
suggests a greater degree of dependence).
Questions which would be appropriate from the candidate to the patient are:
•
'How many cigarettes a day do you smoke?
1
•
‘How soon after you wake up do you have your first cigarette?'
•
'Do you find it difficult not to smoke in nonsmoking areas?'
•
‘Is the first cigarette of the day the hardest to give up?'
•
‘'What is your pattern of smoking during the day?'
•
'Do you smoke even if you are so ill that you cannot get out of bed?'
•
‘Have you tried to stop smoking for good in the past but found you could not?'
The patient's answers to these questions will shape the advice that the candidate then gives. A
'yes ' response to the last question suggests that the patient will need help to stop smoking. When
a patient smokes 20 or more cigarettes/day and has to have the first smoke within half an hour of
waking up then the patient is likely to benefit from nicotine replacement therapy (NRT) or
bupropion.
ADVICE ON NICOTINE WITHDRAWAL
Within 24 hours of reducing or stopping nicotine intake you may experience:
•
depression or otherwise feeling unwell;
•
insomnia;
•
restlessness and irritability;
•
anxiety and difficulty concentrating;
•
drop in heart rate over time;
•
increase in appetite so that you may gain up to 3 kg over the next 12 months:
•
cravings for sweet things; and
•
cravings for cigarettes.
About 5% of nicotine-dependent individuals can stop smoking unaided and less than 25% of
people succeed at their first attempt to quit. Overall the successful quit rate is about 45%
eventually.
Withdrawal symptoms:
•
peak in intensity over the first four days of abstinence;
•
most residual symptoms improve significantly within a month;
•
hunger and weight gain may persist for a year or so.
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KEY ISSUES
• Counselling abilities.
• Awareness of principles of a tobacco quitting programme.
CRITICAL ERROR
• Lack of awareness of the key elements of a nicotine quitting programme.
COMMENTARY
Principles of a tobacco cessation programme follow. Candidates should have a broad knowledge
of the content, and are expected to be aware of, and incorporate most of. the following key
elements into their counselling.
KEY ELEMENTS OF CIGARETTE/NICOTINE WITHDRAWAL PROGRAMME
The key elements of a cigarette/nicotine withdrawal programme include:
• Set a definite QUIT BY date (within two weeks of making the decision to quit).
• Aim for total abstinence — not just 'cutting down'.
• Review previous attempts at quitting and what went wrong!
• Inform family and friends, particularly other smokers, of the plan,
• Avoid alcohol, which is an important trigger for smoking, and similarly review coffee intake.
• Anticipate and discuss likely individual pitfalls and difficulties (for example, weight gain or
depression).
• Practise problem solving as a way of dealing with 'what do I do if/when'.
• Encourage the use of nicotine replacement therapy unless there are contraindications (e.g.
coronary artery disease or pregnancy).
• Recommend starting or increasing physical activity and the importance of a balanced diet.
• Schedule followup visits and supportive phone calls.
NICOTINE REPLACEMENT THERAPY (NRT)
The aim of nicotine replacement therapy (NRT) is mainly to ameliorate nicotine withdrawal.
Neither patches nor gum give the arterial 'high' concentration of cigarettes and the overall dose of
nicotine they provide is about 40% of that provided by cigarettes, but they are not accompanied
by tar. carcinogens or carbon monoxide. Smokers extract about 1 mg of nicotine per cigarette
independent of the brand used, although each cigarette may contain up to 14 mg of nicotine.
Costs of NRT may influence patient choice, but are generally cheaper than continuing to smoke.
Forms of NRT include:
• NICOTINE GUM contains nicotine 2 or 4 mg per piece in a sugar-free resin base. The gum
should be chewed slowly, then left between cheek and gum before being repositioned and
chewed intermittently for up to 30 minutes, 10 times a day. Because nicotine is poorly
absorbed from an acid environment, acid drinks such as fruit juice should be avoided. Mouth
soreness or dyspepsia may occur. Lozenges are an alternative.
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•
TRANSDERMAL PATCHES, preferred by many patients, come in a variety of dosage strengths from 7
mg to 21 mg and in preparations designed to be used for 16 or 24 hours. They are designed to release
nicotine slowly through the adhesive layer of the patch to the skin and hence into the circulation. Patches
are applied each morning on a rotational basis to non-hairy skin sites. Skin reactions or rashes may be
severe enough to warrant discontinuation. They are not available on the Pharmaceutical Benefits
Scheme, and are used for 8-12 weeks.
•
NICOTINE INHALERS are less popular. Gaseous nicotine is released after deep inhalation through the
mouthpiece of a plastic cartridge. About 4 mg of nicotine is released by the device which is single use
only and cannot be reused or recycled, which may mean 10 or more cartridges need to be used per day
for up to 6 months.
All forms of NRT are effective as aids to stopping smoking. There is no reliable evidence to recommend gum
over patches or inhaled, each roughly doubling the chances of successfully quitting. They may be used
together but monotherapy is preferred. The initial strength of nicotine dosage will depend on severity of
dependence as well as average daily intake of nicotine from cigarettes.
Whilst NRT is effective by itself in achieving abstinence, behavioural support from the doctor, family and
friends will increase the success rate.
OTHER SMOKING CESSATION STRATEGIES AND AIDS INCLUDE:
•
Bupropion (slow-release — Zyban®) is an atypical antidepressant with both noradrenergic and
dopaminergic activity.
~ Mechanism of action as an aid to smoking cessation is not related to its antidepressant action, but to
common addiction pathways.
~ Treatment starts at 150 mg/day for the first three days and then increases to 150 mg twice daily.
~ The standard treatment period is nine weeks which is subsidised under the Pharmaceutical Benefit
Scheme in Australia. Maintenance may last a further six months.
~ Nausea, insomnia and dry mouth are the commonest early side effects.
- Bupropion is absolutely contraindicated in patients with a history of epilepsy: and is relatively
contraindicated when there is a history of Type 1 or 2 diabetes.
~ It must not be prescribed during pregnancy.
~ Sustained-release bupropion has been shown to be efficacious in producing abstinence in cigarette
smokers either with or without adjunctive psychological interventions.
•
Clonidine is uncommonly used to moderate withdrawal symptoms.
•
Nortriptyline 10 mg/day has also been trialled as an alternative to bupropion.
•
Pamphlets, stickers, badges and audiovisual and multimedia tapes in different languages are available
through the various state health departments, which can supplement face-to-face counselling.
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Performance Guidelines
General Health 0109 - 2004
SMOKING
Quitting smoking is one of the most important actions you can take to protect yourself
from chronic disease and early death. One in two lifetime smokers will die from their
addiction. Half of these deaths will occur in middle age. Quitting at any age will give
major health benefits and reduce your risk of tobacco related illnesses. With planning
and determination you can quit and stay a non-smoker.
Health effects of smoking
Tobacco smoke contains more than 4,000
chemicals, Harmful ones include:
• Nicotine - is an addictive drug and can make it
hard, but not impossible, to quit. It also affects
vour heart rate and blood pressure.
• Carbon monoxide - replaces some of the oxygen
in your blood, leaving your muscles, heart and
brain with less oxygen.
• Tar - contains many cancer causing chemicals.
Lower tar or 'light' cigarettes are not any better
as you are likely to take deeper putts, more
often, to get the amount of nicotine you need.
Smoking increases the risk of cancer, heart disease,
stroke and lung disease. It affects fertility levels in
men and women and can lead to impotency in
men, and miscarriage and complications in
pregnancy and labour. Smoking affects your
immune system and is ■ cause of many other
conditions such as blindness and osteoporosis.
Harm to others
Environmental tobacco smoke comes from both the
burning end of a cigarette and from the smoke
breathed out by a smoker. This harms not just the
jjf smoker, but also family members and
coworkers. Passive smoking causes heart disease
and lung cancer in non-smokers living with
smokers.
Pharmacy Serf Care is a program
Children exposed to passive smoking are more
likely to suffer from health problems including
asthma, meningococcal disease, coughs and chest
infections. Smoking by the mother is a major risk
factor for sudden infant death syndrome (SIDS or
'cot death).
Do you know why you want to
stop smoking?
It's important to be clear about your reasons. These
are some of the best reasons to quit. You will:
• Breathe, and taste and smell food better within
weeks
• Improve vour circulation, immune system and
the health of your heart and lungs
• Have fewer days of illness and fewer health
complaints than continuing smokers
• Provide a positive example for children and
others
• Save money, a minimum of $2300 per year for a
pack a day habit.
Before you quit
Chemicals in cigarettes change the way
some medications work. We know that
stopping smoking can be Ï stressful. So if
vou have suffered from depression, anxiety
or other mental illness, and/or are taking
medication, speak to your doctor before
quitting.
of the Pharmaceutical
Society of Australia
CONDITION 018. FIGURE 1. Smoking
cessation pamphlet
119
018
Performance
CONDITION 018. FIGURE 2.
Examples of some nicotine replacement therapies (NRT) available
Guidelines
120
019
Performance Guidelines
Condition 019
Excessive alcohol consumption in a 45-year-old man
AIMS OF STATION
To assess the candidate's knowledge of hazardous drinking, including early presentation,
sequelae, types of dependency, and skill in counselling a person who has been drinking
hazardously over a long period of time.
The examiner will have instructed the patient as follows:
You are a 45-year-old businessman who has become concerned about the harmful effects of
alcohol. You have been a regular, now daily, drinker for many years, but you considered yourself
to be an 'average drinker' for your personal situation in life.
You consulted this doctor two days ago. The doctor enquired about your use of alcohol and
other concerns at length, and then examined you. The doctor said your use of alcohol was of
concern and asked you to have some blood tests. You have returned today to discuss the
results.
You should be rather passive, exhibiting acceptance of the doctor's advice, while showing a
contemplative demeanour that suggests that you may not have made up your mind about
modifying or stopping your alcohol intake.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate's approach to the patient should be nonjudgmental and supportive. The
candidate should:
• Explain test results and their interpretation
~ The elevated Gamma glutamyl transaminase (GGT) and Aspartate transaminase (AST),
elevated mean corpuscular volume (MCV) and macrocytosis should confirm the candidate's
clinical suspicion of liver disease due to excessive harmful drinking.
- The candidate should make this clinical suspicion clear to the patient and explain that
excessive drinking is also linked with his hypertension and excessive weight.
• Discuss the effects of excessive drinking in counselling and educating the patient
~ Other physical sequelae on gastrointestinal tract, cardiovascular system and central nervous
system.
~ Family problems, work problems, sexual problem, minor accidents, as revealed from the
history obtained at the previous consultation. Be complimentary about patient's initiative to
consult about his drinking (this is positive and helps probability of compliance).
121
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Performance Guidelines
•
The 'CAGE' or 'AUDIT' questionnaires could be applied during this discussion, or during
counselling:
~ Cutting down on your drinking?: Annoyed by criticism of drinking?; Guilty about your
drinking?; Eye opener needed in the morning?
~ Alcohol Use Disorders /dentification Test.
•
1
Counsel the patient about safe drinking using National Health and Medical Research Council
(NHMRC) Guidelines for men:
~ low risk: less than 4 standard drinks per day;
~ hazardous: 5-6 standard drinks per day; and
~ harmful (high risk): more than 6 standard drinks per day.
•
Counsel the patient that the test results show that his drinking level is above safe drinking
levels:
~ A 'standard drink' contains approximately 10 grams of alcohol. When conventional
glasses/containers are used, the volume of each drink reduces as the strength increases.
Adjustments must be made for the different strengths of beer because cans/bottles are the
same size.
~ The test results show that he is demonstrating clearly harmful and progressive effects of
excessive drinking.
•
Explain types of dependency:
~ Social (applies to this patient);
~ Psychological (may apply to this patient);
~ Physical (probably applies to this patient).
•
Discuss the significance of amount and duration of alcohol use in determining risk oi physical
dependency. Hallmarks of physical dependency include:
~ increasing alcohol tolerance (which decreases in later stages);
~ withdrawal symptoms (tremor, sweating, hyperarousal through to delirium tremens); and
~relief from withdrawal
(benzodiazepine).
symptoms
by
further
alcohol
consumption,
or
agonist
•
Discuss the social, behavioural, emotional and cognitive sequelae of excessive
alcohol use in family, work, social and individual settings.
•
Explain that excessive habitual consumption/dependence can be associated with target organ
damage without psychological or social disorders and vice versa.
•
As initial management, advise a period of abstinence to test presence and/or degree of
physical dependency. Indicate availability to assess and treat any symptoms which may arise
such as tremor, sweating, excitability and craving.
•
As followup management, the candidate should:
~ suggest further consultation shortly;
~ offer to see wife;
1Curtin: Research Centres: University Research Institutes: National Drug Research Institute. Screening for
I
I hazardous alcohol
use and dependence in psychiatric in-patients using the AUDIT questionnaire, Hulse. G.K., Saunders. J.B., Roydhouse, R.M.,
Stockwell, T.R. and Basso, M.R., 2000. http://espace.list.curtin.edu.au/archive/00000076/
122
019
Performance
Guidelines
Self Help 0506-2004
ALCOHOL
Alcohol can interact with some medications and certain medical conditions can be made worse bv
drinking alcohol. In Australia, alcohol problems affect the health and well being of many individuals,
families and communities. Many people drink in ways that put themselves at risk of alcohol‐related
harm. The Australian Alcohol Guidelines recommend levels for low‐risk drinking.
How much is too much?
• Drinking at risky or high‐risk levels means
drinking many drinks in one day. You do not
need to do this regularly to cause harm.
• Hxcessive alcohol consumption can cause health
problems in the longer term. You do not need to
get drunk tor this to cause harm.
Who are the Guidelines for?
The Guidelines indicate the low‐risk drinking levels
for the general population. They are for people who
are not on medications, do not have medical
conditions that are made worse by drinking, and are
not elderly, pregnant or breastfeeding. If you weigh
less than 60 kg for men or 50 kg for women, or are
about to drive or operate machinery, the levels
recommended in the guideline for the general
population should be reduced.
drinks in any one day
Number of alcohol‐free
days per week
1‐2
1‐2
What is a standard drink?
The pictures below show the number of standard
drinks found in typical serving
containers. Be careful ‐ glasses
of wine and spirits can vary
widely in size and alcohol
content.
375ml full strength beer
180ml average restaurant serve of wine
What do the Australian Alcohol
Guidelines recommend?
People who drink regularly (almost daily), more
than eight standard drinks a day, should see their
doctor before attempting to change their drinking
habits.
Average number of
drinks per day
Men
4 or less
Women 2 or
less
Maximum number of
drinks per week
Maximum number of
Australia
28
14
6
4
1.8
.Wml spirit nip I
300ml alcoholic soda 1.2
Check the label
All alcoholic beverages have the number
of standard drinks in the container on the
label. Use this to calculate the number of
standard drinks.
Pharmacy Serf Care is a program of the Pharmaceutical Society of
CONDITION 019. FIGURE 1.
Alcohol ingestion guidelines
1
019
Performance Guidelines
~ mention availability of Alcoholics Anonymous. Weight reduction and control of
hypertension will need to be undertaken but cannot be successful unless use of alcohol
is modified; and
~ make clear to the patient that he has to come to his own decision about what to do, but
that he can expect ongoing support in followup.
The above points serve as guidelines only. The content, order and emphasis offered by the
candidate will vary and examiners will need to give a global assessment of the candidates
interpretation of the test results and counselling skills with regard to hazardous drinking.
•
Interpretation of results of liver function tests (LFTs) and full blood examination (FBE).
•
Explanation of effects of hazardous and harmful drinking.
•
Advising a period of abstinence to establish type and degree of dependency.
• Taking a judgmental attitude and blaming patient for his condition
As well as knowledge of hazardous drinking, this case allows assessment of the candidate's
communication skills and knowledge of counselling as the principal form of management in a
behavioural problem, in which the type of dependency is uncertain at this stage. The patient is
likely to have true physical dependency; the next step in management is to test this assumption
by asking the patient to try abstinence and see what happens. Subsequent management will
depend on the result and the willingness of the patient to accept and control the type and degree
of dependency on alcohol.
124
020
Performance
Guidelines
Condition 020
Type 1 diabetes mellitus in a 9-year-old boy
AIMS OF STATION
To assess the candidate's knowledge of practical aspects of childhood diabetic care — which is
not very dissimilar to adult Type 1 diabetic care — and the candidate's ability to answer queries of
a concerned parent. The questions chosen are similar to those asked by parents who are
anticipating the problems that they may encounter in the months after initial diabetic education
and discharge from hospital
EXAMINER INSTRUCTIONS
The examiner will have instructed the mother as follows:
As many candidates have a tendency to refer any question they are uncertain of to a higher
authority (for example, their registrar or consultant), you should not accept that answer, but ask
what sort of things the consultant is likely to say about that question.
Each question asked by the parent requires an answer from the candidate so that examiners
should keep a close watch on the time, and indicate to the parent to move to the next question if
the candidate is either spending too much time on detailed information, or does not provide the
appropriate explanation. This will ensure that the candidate has the opportunity to cover all of the
questions in the allotted time.
Satisfactory candidates will answer each of the following questions asked and cover most of the
following points.
Questions to be asked by the mother (in this order)
Opening Statement
'Will he need insulin injections each day from now on?'
If the candidate indicates (correctly) that the child will require daily insulin, ask how often and
then ask
'Who is going to be giving Roger's insulin from now on?'
‘How do I assess the day to day control of his diabetes?'
'What do I need to do about his school?'
'Will he be able to go to school camps? What should I do about them?'
‘He went to his first sleepover party a few weeks ago — could he still go on these now?'
'Can he play sport?'
The above questions are designed not only to test the candidate's knowledge but ability to
reassure the parent that with appropriate tuition, she will be confident in handling her child's
diabetes and in teaching other people with whom he will be in contact to understand and manage
his diabetes.
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020
Performance Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
Opening statement/Need for insulin injections?
The candidate should indicate that the child will be on life-long injections of insulin and should
go on to describe that this is usually in a regimen of twice daily insulin injections consisting of a
combination of a short-acting insulin and an intermediate-acting insulin to allow for a 24-hour
cover. At this age it is usually inappropriate for children to be on basal/bolus insulin regimen.
This is best left until teenage and when the child is ready to accept four injections per day.
Q 2 Who injects?
The candidate should advise that both parents if available, and perhaps an older sibling, should
learn the injection technique in case of parental sickness or absence. Similarly they should
understand how and when to give glucagon. Candidates should indicate that the Paediatric Unit
staff and educators will ensure that parents are confident of drawing up and administering
insulin before discharge, and if necessary will arrange help at home from the District Nursing
Service after discharge.
Q 3 Monitoring?
The candidate should indicate that blood sugar levels are monitored several times daily by a
glucometer (illustrated), the details of which will be shown to the parent. These levels are
usually assessed before each meal and before bed at night. This allows the clinician and the
parent, when confident, to be able to review the blood sugar levels and to recognise if an
adjustment in the insulin dosage is required. This is usually adjusted based on a trend over
several days rather than on a day-to-day basis.
The doctor should also indicate that urine testing for ketones should also be done if the blood
sugar levels are persistently high, or if the child is unwell for any reason.
CONDITION 020. FIGURE 1.
Glucometer kit for blood glucose monitoring
126
020
Performance
Guidelines
0 4 School liaison?
The candidate should advise that the parent should notify Roger's school of his diagnosis and
indicate that the school will probably be visited soon after the child's discharge from hospital by
the Ward diabetic educator in association with the parent to instruct the relevant school staff as to
the important features related to possible complications at school (the most likely one being
hypoglycaemia and how to detect and manage it).
The parent will also be advised to take every opportunity to review these important aspects of
care with the school staff and to ensure that any new staff are made aware of the child's
condition. Similarly the school should be given phone numbers to ensure that the parents, the
child's general practitioner and if necessary the Hospital/Children's Ward can be contacted in an
emergency. In an emergency most schools will contact the Ambulance service who will be
capable of managing the situation on arrival.
Q 5 School Camps?
Management at school camps may vary often depending on the age of the child. With young
children, parents are often encouraged to attend as camp parents and this would be appropriate
for this family if one or other parent is able to do so.
Management is related to the confidence and experience of the teachers involved and how
comfortable the parents are with the teacher's knowledge. The Paediatric Unit, in conjunction
with the parent will support the teachers by education and telephone support. Many camps for
young children are held relatively close to the school district.
If the camp is in a distant town, supervising teachers with good clinical acumen are a
prerequisite, but a letter should be supplied to a local medical practitioner explaining the child's
diagnosis and providing details of the insulin regimen, blood sugar levels and telephone
contacts.
Some school camps have permanent staff who have children attend with a variety of medical
conditions (for example, epilepsy and diabetes), and these staff are given special detailed
instructions as to the complications and management of these conditions. The parent should be
encouraged to enquire as to the knowledge of the staff involved.
The parent should be advised that the aim of the treatment and education program is to allow the
child to live as normal a life as possible and Roger should be encouraged to participate in all the
school activities. This usually is possible; but the parent should be satisfied that the personnel
involved are cognisant with the treatment for the child.
Q 6 Sleepovers?
These should also be encouraged for reasons previously discussed. Sleepovers should usually
be at the home of a family who know the child and parents well; so that there can be a frank
informative discussion on the child's management, which is highly likely to be known to the host
family. Similarly, this should usually be at a home close to the child's home so that if necessary
the child's parent may be able to call over and do the blood test as well as give the insulin in the
evening and next morning, until the child is old enough and reliable enough to do these by
himself.
Q 7 Sport?
The parent should be assured that there is no reason why the child cannot play most sports. He
will be excluded from some activities (for example, piloting an aeroplane). A good candidate will
mention that insulin doses may need to be adjusted prior to active sport to allow for the increased
glucose metabolism associated with physical activity.
127
020
Performance Guidelines
The candidate should be able to counsel the parent in a reassuring manner that parents will not be left
entirely on their own in the management of their child, and that help is but a phone call away. Most candidates
should be able to handle this discussion with ease and confidence by applying general principles in their
discussion and this should comprise part of the overall assessment of the candidate.
Most of the detail for this case is provided in the examiner's instructions. Much of the advice to be given is
• Ability to answer the specific questions of the parent accurately and sensibly
CRITICAL ERROR
• Failure to discuss symptoms and treatment of insulin-induced hypoglycaemia
common sense in relation to the ongoing care of a person with diabetes and should not be a problem to the
competent candidate. The scenario is designed to assess both the knowledge of the topic and the candidate's
ability to provide accurate information in a reassuring manner to a parent who is trying to cope with a
diagnosis, which to most parents is initially devastating and upsetting.
The emphasis in many of the answers should be allowing the child to lead as normal a life as possible, so that
school and social activities should be maintained wherever possible. Under most circumstances this can be
achieved.
The key to success in these situations is whether parents are well educated in their child's condition and can
confidently instruct others accurately in the management of the child. Families who achieve this are generally
very successful in managing their child's diabetes confidently and appropriately; and the child is generally
able to progress satisfactorily through childhood with minimal restriction, if any, in lifestyle.
128
021
Performance Guidelines
Condition 021
Request for vasectomy from a 36-year-old man
AIMS OF STATION
To assess the candidate's ability to explain the surgical procedure of vasectomy, its
complications, effectiveness, reversibility and effects on sexual performance.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
Your wife aged 34 years, who works as a secretary, wishes to cease oral contraception
because of weight gain. She has taken 'the pill' since the birth of your son now aged seven
years. You also have a daughter aged nine years. Your wife would prefer not to have a tubal
ligation.
You are happily married with a mutually satisfactory sexual relationship and neither of you
wishes to have another child. You have no extramarital relationships. You want a-vasectomy
but have reservations about the operation because of possible complications, reliability,
absence from work, and any adverse effect on your sexual performance.
Questions to ask unless already covered
(the candidate's expected responses are in brackets):
• ‘Is it 100% effective?' (No, recanalisation of vas can occur rarely).
• ‘How do you know it has worked?' (Semen analysis showing no spermatozoa after 20 or so
ejaculations, test repeated on at least two occasions).
• ‘Can the operation be reversed?' (Reversal requires microsurgery, success uncertain.
Because sperm antibodies can occur, and these reduce fertility, even if the tubes can be
connected satisfactorily, success is not 100%).
• 'Are there any complications?' (Wound infection, temporary discomfort, bruising, and
haematoma).
• ‘Will there by any change in my sexual performance?' (No. not after recovery from
operation).
• 'How long afterwards can we resume normal sex?' (As soon as you are comfortable. A
condom must be used until the result of the postoperative sperm count is known; or wife
should continue to use the pill until the sperm count is clear).
• ‘Does my wife have to sign anything^' (Preferable if both provide written permission).
• ‘What is actually done?' (Description of identification and division of vas).
• ‘Will my wife notice any difference?' { N o ) .
• ‘What happens to the semen?' (Semen ejaculated but no sperm).
• 'Can it be done as a day procedure?' (Yes).
• 'Will I have a general anaesthetic?' (General or local used with sedation).
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021
Performance Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
Approach to patient
•
Give reassurance about result of checkup (good health).
•
Be supportive and give honest advice about the procedure.
•
Provide information in a clear and concise manner.
•
Deal with patient uncertainties.
Explanation of the procedure
•
Surgical procedure of vasectomy — how it is done.
•
Inconvenience and complications.
•
Postoperative sperm counts.
•
Effectiveness and reversibility — although reversal is sometimes possible, vasectomy should effectively be
regarded as a method of permanent sterilisation.
•
Timing and effect on sexual activity/performance.
•
Use of diagram, patient education material (e.g. Royal Australasian College of Surgeons patient information
brochure).
Counselling
•
Recommend involvement of patient's wife — offer to discuss procedure with her.
•
Advise that she should preferably also give written permission.
•
Discussion of alternatives, (i.e. condom or diaphragm with spermicidal).
•
Clarification that they need to use contraception until seminal analysis is negative.
• Adequate explanation to the patient of the procedure and its followup.
•
False reassurance that the procedure is 100% effective before at least two negative sperm counts.
•
False reassurance that a vasectomy is easily reversed.
•
Refusal to discuss sterilisation.
Appropriate consent for vasectomy is required. Permission of the patient's wife is not obligatory but is strongly advised
by medical defence organisations.
The candidate may have religious or cultural objections to contraception in general or vasectomy in particular. If so.
candidates have been advised to inform the patient of their position at the beginning of the consultation. However,
medical knowledge of the procedure is still expected together with the communication skills required in explanation.
This recognises the patient's right to seek the procedure and the doctor's right not to remain nvolved beyond this
consultation, but to suggest appropriate referral after initial discussion.
130
1-B: Case Presentations to Examiner
Vernon C Marshall
'Begin with an arresting sentence; close with a strong summary; in between speak simply,
clearly and always to the point; and above all be brief.'
William J Mayo (1861-1939)
American physician
Case Presentation and Discharge
Summary scenarios 022-029
02
2
02
3
02
4
02
5
02
6
02
7
02
8
02
9
Headache
Neck lump
Previous shoulder dislocation
Dysphagia
Low back pain
Knee pain
Abdominal discomfort
Gastric ulcer with haemorrhage
Verbal Case presentation
to an observing examiner or
senior colleague is a
fundamental part of clinical
medicine. It may consist of an
informal exchange of
information between colleagues
on a ward round or it may be a
more formal presentation to an
examiner or to a group in
examination circumstances.
Whatever the circumstances, it
is essential that the listener's
interest and attention are kept
and that information is clearly
accurately and sensitively
transmitted.
131
1-B
Case Presentations to Examiner
CONDITION 022
CASE PRESENTATIONS
A number of AMC MCAT communications with examiners will involve answering questions or
prompts asked by the examiner to clarify points of diagnosis or management. These usually
require brief and succinct candidate answers.
Example 022
Examiner: What do you believe is the most likely diagnosis from the information you have
found so far?'
Candidate: 'Tension headaches. '
Examiner: 'Are any alternative diagnoses likely?'
Candidate: ‘I think the clinical presentation fits tension headaches rather than migraine. I don't
think a serious cause like temporal arteritis or raised intracranial pressure is likely.’
Examiner: 'Please now advise your patient of the likely diagnosis and your management plans.’
In most of these multiple short assessments your oral presentation to the observing examiner
will be necessarily brief, with most of your communication interchange being with the
standardised patient.
However, practice in delivering summarised case presentations to an observing examiner (as
could occur in an extended or composite station) is well worthwhile as an aid to improving your
communication skills, and to organising and presenting clinical reasoning skills in data
acquisition, assimilation and interpretation, to best effect and in a logical manner.
You may find it easiest to do this along disease-centred diagnosis approaches by
succinctly summarising history, examination findings, diagnostic and investigational plans and
management — separately or sequentially.
Alternatively, a biopsychosocial approach, centred on the individual patient's presenting
condition and problem and the demographic and psychosocial environment, may be preferred.
Verbal Case presentation to an observing examiner or senior colleague is a fundamental part
of clinical medicine. It may consist of an informal exchange of information between colleagues
on a ward round, or it may be a more formal presentation to an examiner or to a group in
examination circumstances. If the patient is also present and listening, the presentation needs
to be given in such a way as not to upset the patient.
Whatever the circumstances, it is essential that the listener's interest and attention are kept and
that information is clearly, accurately and sensitively transmitted.
Relevant data should be given in a systematic and concise form highlighting the
presenting problem, and evolving into a coherent whole.
To summarise a patient's problem fully, begin with patient identification (age is essential) and
reason for presentation.
Proceed to a narrative, which may sequentially summarise examination findings, investigation
findings, systems review, risk factors, and diagnostic and treatment plans; or may be confined
to one of these domains, depending on circumstances.
If asked to describe what task you are doing as you proceed (such as performing a physical
examination), make sure you both describe and perform.
132
1-B
Case Presentations to Examiner
CONDITIONS 023-027
Example 023
Candidate: 'The patient has a lump in the right anterior triangle of the midneck which feels like
a lymph node enlargement. I shall proceed to examine the skin of face and scalp,
the oropharynx and nasopharynx, and the external ear for any primary pathology'.
Then go ahead and do what you said you will do. One of the most common errors is failing
to observe appropriately. 7 am now looking for muscle wasting. Next I shall test reflexes and
power... 'and missing the obvious muscle atrophy which is present, by not actually looking.
Example 024
Candidate: (To the examiner) 'The patient has had a past history of dislocated shoulder of his
dominant right arm and my task is to assess the current status.
I shall begin by inspection of contour looking in particular for wasting or deformity
None is apparent (make sure you have looked). / shall now test the range of active
movements, comparing these to the opposite normal side. '
(To the patient) 'Please face me and move your arms as I do'.
Example 025
Examiner: 'What is your provisional diagnosis?'
Candidate: 'The patient is aged 60 years and has a history of progressive painless dysphagia
for the past 6 months associated with weight loss. I think the most likely diagnosis
is an oesophageal lesion, probably a neoplasm. You have informed me that
physical findings are noncontributory in the chest, neck and abdomen. He needs
further investigation by diagnostic imaging or endoscopy. I shall explain this to him
and arrange appropriate referral and followup... '.
Examiner: 'Which of the two investigations would you choose?'
Candidate: 'Endoscopy usually is most definitive. Preliminary contrast imaging may help by
identifying the site of a stricture and can show extralumenal aspects like extrinsic
compression, so I shall order a contrast swallow now as well as arranging
consultation for an endoscopy'.
Examiner 'Please now advise the patient of your recommendations'.
:
Example 026
Examiner: Please summarise your history and findings and your provisional diagnosis '
Candidate: 'The patient is aged 25 years and has had low back pain with sciatic radiation after
a lifting strain at work two weeks ago. He has painful limitation of back movements
and symptoms and signs suggesting lower lumbar nerve root impingement. I
believe the most likely diagnosis is a lumbar disc prolapse with L5 radiculopathy'.
Example 027
Examiner: Please summarise your findings on physical examination so far'.
Candidate: 7 was asked to examine the right knee area in this young man with a past history of
twisting strain to his knee and persisting pain on its inner side. He walks with a
painful limp favouring the right leg. He finds it difficult to bear weight on that side,
and painful to kneel or squat'.
133
1-B
Case Presentations to Examiner
CONDITION 028
He cannot fully extend the right knee, the deficiency is 15°. and flexion range is
normal. I cannot detect any joint effusion, and there is no local swelling. Joint
stability is stable testing the collateral ligaments and cruciate ligaments.
Patellofemoral mobility and tracking appears normal; patellofemoral friction is not
painful. He has localised tenderness over the joint line anteriorly on its inner side.
There is no muscle wasting. The other knee appears normal'.
Examiner: What is your provisional diagnosis?'
Candidate: 'Injury to the medial intraarticular cartilage'.
Example 028
Examiner: 'Please summarise the history you have obtained so far and your provisional
diagnosis from the history'.
Candidate: 'Mrs S is a 65-year-old widowed pensioner with a number of problems.
'She has a recent history of increasing abdominal discomfort and bloating
related to meals over the past four weeks, with episodes of greater discomfort
which have woken her from sleep intermittently. The pain is epigastric and diffuse
without radiation. She has occasional reflux of bitter fluid, she has not vomited nor
passed blood. She gets some relief from a glass of milk. She neither smokes nor
drinks alcohol. 'She has a number of relevant associated problems.
'She has had rheumatoid arthritis, affecting predominantly the hands, for 15 years
and has been treated with anti-inflammatory agents and steroids and has required
periodic increased steroid dosage for exacerbations. She is currently on 5 mg
prednisolone and Celebrex®.
Type 2 Diabetes: Non-insulin dependent diabetes mellitus was diagnosed 5
years ago. She is on diet and oral hypoglycaemics and blood sugar control has
been good — BS 5-6 mmol/L. She has regular eye and foot and blood checks, and
has been told these are all satisfactory.
'She had a myocardial infarction 10 years ago with no sequelae. She remains on
low dose aspirin.
'She has hypertension which has been controlled by an ACE-inhibitor. 'She has
always been overweight despite dieting.
'There is a family history of diabetes and of coronary artery disease. There is no
other relevant medical past history.
'She was widowed 5 years ago She lives by herself and her three grown children
live interstate. Her rheumatoid arthritis has progressively worsened and has caused
increasing difficulties in activities of daily living
Examiner: How would you plan to proceed?'
Candidate: Her multiple medical comorbidities and problems have been mentioned and are likely
to be contributory to the presenting problem.
'She has a number of risk factors for peptic ulcer disease. I believe an upper
gastrointestinal endoscopy will be needed to check for peptic ulcer, gastritis or
reflux oesophagitis as a cause other abdominal discomfort. Gall stones should also
be excluded by ultrasound. '
The above is a good demonstration of a problem-based summary.
134
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Case Presentations to Examiner
CONDITION 029
Scenarios requiring presentation of diagnostic case summaries to the examiner are exemplified in Conditions
65 (chest pain) and 66 (palpitations and dizziness) as well as in scenarios in other sections.
In a patient whom you have been treating as an inpatient, the communication required may be a written
discharge summary
Example 029
Copy of Discharge Summary to local medical officer. Discharge
Summary
Name: Mr B, aged 66years, DOB. 16.8.1937. Hospital Record No . . .
Inpatient
dates:
Problem number
13.2.2004-20.2.2004
Title of problem
#
1 Gastric ulcer with haemorrhage ~ Haematemesis and
melaena ~ Endoscopic fulguration
Onset
13.2.2004
Rheumatoid arthritis
1988
# Myocardial infarction
1992
Status
Active
Active
Inactive
#1 Gastric ulcer with haemorrhage — haematemesis and melaena
Mr B, a 66-year-old pensioner, has been taking anti-inflammatory drugs for rheumatoid arthritis diagnosed in
1988. His medications have been Celebrex® with intermittent steroid courses for exacerbations. At time of
admission had been on prednisolone for past two weeks. He had a past history of myocardial infarction in
1992 with no sequelae.
He presented with a history of having vomited blood on two occasions, and passed a tarry melaena stool
earlier that day. He was haemodynamically stable on admission. Urgent endoscopy was arranged which
showed a shallow gastric ulcer in the prepyloric region with a bleeding point which was fulgurated. Biopsy of
the edge was performed which confirmed a benign gastric ulcer. He was begun on a proton pump inhibitor
(omeprazole) and his steroids and NSAID were discontinued.
He was discharged after being observed in hospital for a week without recurrence of bleeding.
Prognosis is guarded in view of associated risk factors of arthritis likely to require resumption of
anti-inflammatory and steroid treatment. He will require long term acid inhibition medication.
#2 Rheumatoid arthritis
Rheumatoid arthritis since 1988 affecting mainly the hands and wrist. Significantly disabled by pain, stiffness
and deformity causing loss of function. Referred to rheumatology clinic for advice on continuing management.
Medications on discharge:
•
Omeprazole 40 mg daily
• Paracetamol tablets two q.i.d.
Followup
•
Gastroenterology outpatients one week
•
Rheumatology clinic one week
•
Local medical officer, Dr S.B
135
136
2 Clinical Diagnosis
(D)
2-A: The Diagnostic Process — History-taking and Problemsolving
Reuben D Glass
'Listen to the patient, he is telling you the diagnosis.'
Sir William Osier (1849-1919)
History-taking usually provides the most important diagnostic evidence. Obtaining this
evidence requires the communication skills previously discussed in Section 1 Clinical
Communication'.
Good clinicians organise knowledge so they can quickly retrieve and use relevant data, by
1
grouping knowledge into 'chunks', often groups of three items of information. In addition to
recognising diseases by patterns, they recognise groups of symptoms and signs, which have
value in discriminating between one disease and another, or between one group of diseases
and another. The alert clinician also notes unexpected variations from a common pattern. For
example, a child with fever is usually flushed. The child with an infection who is pale is
unusual; the pallor may result from the circulatory insufficiency of septicaemia. Experienced
clinicians gather important evidence early in a consultation. A number of cues are noted within
seconds of meeting a patient. Where are we meeting? Is the
patient male or female, young or old, relaxed, anxious, or When solving clinical
unconscious? What else do I see? What is the opening problems, clinicians tend to
sentence or two of the presenting complaint? The combination review hypotheses either by
of verbal and nonverbal information, which impresses the some form of rule, by
clinician when first meeting the patient, has been called the informally weighing
'dominant cue'. It is the starting point for action or information- probability, by considering the
gathering, by triggering ideas from the clinician's memory. The soundness of the cause-andmost frequent error in the diagnostic process arises from faulty effect relationships of the
triggering. It is important to check what the patient means by evidence, or by a comb I
nation of methods.
what was said.
'Framing the problem' is an art requiring practice to avoid going on a false trail. For example:
a 45-year-old man, who had an appendicectomy for appendicitis two years ago now presents
with symptoms of an acute small bowel obstruction. The most likely and most common cause
is adhesions. In such instances spontaneous resolution often follows conservative
management. The careful clinician will ensure that less common but weightier causes —
external hernia or colonic malignancy, which would require corrective urgent surgery — are
considered and excluded.
The dominant cue may provoke urgent action by triggering a process of pattern-recognition,
which is close to an end-diagnosis. This is essential in life-threatening situations. For example,
if a patient presenting after a motor crash is gasping for breath and has a weak pulse with one
side of his chest moving less than the other, then does he have
1 Glass, Reuben D. Diagnosis: A Brief Introduction. Oxford University Press, Australia. 1996
137
2-A
The Diagnostic Process — History-taking and
Problem Solving
a life-threatening tension pneumothorax requiring urgent needling? Pattern-recognition is also helpful in dealing
efficiently with common diseases, provided the clinician remains alert for deviations from the regular pattern.
Excessive reliance on pattern-recognition may lead to failure to consider diagnostic alternatives methodically.
If the dominant cue does not demand immediate action, further evidence is gathered. The clinician changes from a
rapid, pattern-recognition mode of functioning, to a measured consideration of hypotheses. The first task is to
elaborate details of the patient's presenting complaint and confirm that the dominant cue has been interpreted
correctly. Then provisional hypotheses, which the cue suggests, are explored. Groups of observations may raise the
possibility of related diseases.
Problem-oriented questions probe a subject in depth when the dominant cue suggests that this is warranted,
keeping in mind the likelihood of a disease, and the value of treating it. Most questioning attempts to elicit symptoms
to support a diagnosis, but the absence of a feature in history or examination may be of great diagnostic value.
During the diagnostic encounter, the clinician is mindful of the events that have influenced the patient's life, leading to
the presentation for medical attention. Screening questions, to assess whether a problem may exist in another
system or subject area, form part of a complete assessment. These questions reflect a doctor's style. In a full
consultation, the background of the patient needs to be known. This involves a history of past illnesses, enquiry about
other family members, their health and occupations, and interpersonal relationships.
Rather than relying on question lists for system reviews, experienced clinicians choose questions that give the highest
yield for the specific situation, collecting the most critical information early in the interview. They structure data,
processing a limited amount of information at one time in meaningful packets. It is often helpful to summarise the
events that led to the patient's presentation for medical attention, and to repeat this concisely to the patient.
This helps to ensure that the clinician understands what the patient meant by what he said, For example, the patient
may have said 7 seem to have peed an awful lot lately'. The clinician may summarise this as 'you have been
concerned about passing large amounts of urine'; and the patient may respond lno, I don't do much, it's just I have to
go often'. By repeating the information in unambiguous but nontechnical language to the patient, this clinician has
avoided the traps of incorrectly mentally coding the dominant cue as 'polyuria instead of 'frequency'. On other
occasions, the clinician's summary may trigger a further comment from the patient, about some important item that
was not mentioned.
If the situation does not require immediate action, the clinician usually develops a number of hypotheses — often
three — about how the patient's symptoms might be explained. Thus abdominal pain may be due to an
intra-abdominal cause, or result from referred pain due to intrathoracic or spinal causes. The data is checked to see if
it explains the various hypotheses. If so, the hypothesis becomes active; otherwise it is rejected. Beginners tend to
jump to conclusions too rapidly, considering one hypothesis at a time, until the evidence against it is overwhelming,
only then allowing them to move to another hypothesis. Experts 3onsider a number of possibilities and rank them.
This process occurs early in diagnostic :hinking. The ultimate refinement is called a 'differential diagnosis'. Early
lists of hypotheses nay include some specific diagnoses (for example, 'acute appendicitis'), but are mainly ideas
about disease groupings (for example, 'intra-abdominal mischief). Compiling a set Df active hypotheses often
involves including some inclusive category (such as 'something
138
2-A
The Diagnostic Process — History-taking and
Problem Solving
odd'), which serves until attention is drawn to that situation and is evaluated more fully. Thus sudden vomiting
without preceding nausea is unusual and raises the possibility of intracranial disease. Diseases have a variety
of forms and their manifestations often do not follow the typical textbook example. Experience provides a
picture of the variations. A common strategy is to alternate between questions aimed at confirming a
hypothesis, and others aimed at distinguishing it from other hypotheses. Hypotheses remain active longer if
they include common situations, or if they involve 'high stakes' — that is, potentially serious diagnosis.
Logically, this means that hypotheses favour readily treatable or remediable situations even if they are unlikely
(though even more if they are probable).
As with history-taking, clinical examination can be divided into problem-oriented and
screening signs. Problem-oriented signs are best given in clusters, which relate to disease groups. Here,
normal, or negative findings can also be given in some detail. Less detail is generally appropriate in the
screening component of the examination. An outline of pathways of diagnostic and management planning is
shown in Figure 1.
When solving clinical problems, clinicians tend to review hypotheses either by some form of rule, by informally
weighing probability, by considering the soundness of the cause-and-effect relationships of the evidence, or
by a combination of methods. For descriptive purposes, consideration of each hypothesis may be divided into
stages. To determine the probability of disease, the clinician needs an awareness of the prevalence of the
disease in the population, and the usefulness of the observation. Thus stronger evidence is required for
diagnosing a rare disease than for a common one.
Diagnostic reasoning involves considering the value of items of information. Artificial methods can be used to
analyse the process. One method is 'revising the odds'. Before an observation is made, the 'prior odds' of
disease (chances of disease compared with nondisease) are expressed as a number or fraction. This is
multiplied by the 'likelihood ratio' (chances of observation in disease, compared with nondisease; or 'leverage
of the evidence'), to give 'revised odds'. A simpler method involves 'weighing the evidence', where the initial
idea and subsequent observations are given scores which are added.
Diagnostic errors arise when clinicians confuse populations with differing frequency of disease. Malaria may
be the probable diagnosis of a febrile patient in a tropical area where the disease is endemic, but in a similar
patient in a temperate zone, more evidence will be required to confirm that diagnosis. Hoof beats usually imply
horses, not zebras — but the odds require revision in Africa.
It is also important to realise that the absence of a feature does not necessarily have the same leverage or
weight as its presence: the relative value of each may be completely different. Thus severe crushing central
chest pain associated with pallor strongly suggests myocardial infarction, however, as this feature is absent in
half of the patients with acute infarcts, the absence of the 'classical pattern' is of limited diagnostic value.
Similarly, the presence of a bruit over the thyroid is diagnostic of hyperthyroidism. The absence of a bruit,
however, is only weak evidence against the diagnosis. Sometimes absence of a feature — a 'normal' finding —
may be of great value in differential diagnosis. For example, absence of anorexia or nausea is evidence
against the diagnosis of appendicitis, though the presence of these features is of little diagnostic value.
Knowledgeable candidates will highlight discriminatory 'normal' findings in problem definition, in contrast to
'normal findings' on screening.
The need for action depends on the likelihood of a disease, and the value of treating it. Thus evaluating fully
the possibility of a rare disease that is amenable to treatment is important, although perhaps less important if
treatment is unsatisfactory.
139
2-A
The Diagnostic Process — History-taking and
Problem Solving
Gathering clinical or laboratory information about a patient costs money — whether from doctor or patient time,
inconvenience, or equipment. While information must be complete for the purpose of deciding management,
it needs to be obtained efficiently. In deciding on patient management, two threshold levels of likelihood of
disease are important. Below the lower level, no amount of new evidence would suggest that treatment is
warranted. Above the upper threshold, no additional evidence is going to alter the treatment decision. While
some redundancy of information is appropriate when there is significant doubt or risk, unnecessary
investigations should be avoided. At times, they may even be misleading. For example, if acute appendicitis
is confidently diagnosed on clinical evidence, a normal leucocyte count should not be taken as a
contraindication for surgery.
Pathways in the diagnostic process are summarised in Figure 1. Examination candidates should recognise
that questions have been designed to test skills in different aspects of the diagnostic process, generally using
role playing patients. Candidates should read and follow instructions carefully. On occasions, they may be
asked to elaborate on a patient's history; on others, to examine a particular organ or system or region. Other
scenarios may give all relevant information, requiring a candidate to deduce the diagnosis, or differential
diagnostic possibilities, and explain the management to the patient. In all cases, the ability to achieve rapport
with the patient is expected.
Reuben D Glass
140
2-A
The Diagnostic Process —
History-taking and Problem Solving
SECTION 2-A. FIGURE 1.
Pathways in the diagnostic process. In practice, the clinician uses all these methods.
Examination scenarios are often designed to test one component of the process.
Arrange follow up if required
□
Pattern recognition. Rapid diagnostic pathway, essential for urgent solutions. Recognition of a typical
pattern may be used for common problems.
□
Problem-oriented diagnosis generating and evaluating hypothesis.
□
A full systematic enquiry is needed for complete patient care.
141
2-A
The Diagnostic Process — History-taking
and Problem-solving
2-A The Diagnostic Process — History-taking and Problem-solving
Candidate Information and Tasks
M CAT 030-043
30
Jaundice in a breastfed infant
31
A convulsion in a 14-month-old boy
32
Loud and disruptive behaviour of a 6-year-old boy
33
Tremor in a 40-year-old man
34
Headache in a 35-year-old woman
35
Lethargy in a 50-year-old woman
36
Syncope in a 52-year-old man
37
A painful penile rash in a 23-year-old man
38
Primary amenorrhoea in an 18-year-old woman
39
A skin lesion on the cheek of a 50-year-old man
40
A pigmented mole on the trunk of a 30-year-old woman
41
An itchy rash on the hands of a 19-year-old woman
42
Red painful dry hands in a 30-year-old bricklayer
43
Swelling of both ankles in a 53-year-old woman
142
030
Candidate Information and Tasks
Condition 030
Jaundice in a breastfed infant
CANDIDATE INFORMATION AND TASKS
Baby Helen is brought to see you in a general practice setting, as her mother is concerned about her continuing
jaundice. Helen is now two weeks old and was born at term by easy vaginal delivery weighing 3.7 kg. Apgar scores
were 9 and 10 (at 1 and 5 minutes respectively).
She became jaundiced in the neonatal period starting on day three. Investigations then revealed no blood group
incompatibility, both mother and baby being group O positive and no red blood cell (including enzymes) abnormality.
The infant was treated with phototherapy for two days. Since discharge from hospital at eight days of age the jaundice
has persisted and the mother is concerned. Baby is feeding well from the breast. Current weight is 3.9 kg.
Examination findings
The baby was active and clinically normal apart from the jaundice when you saw her yesterday. You arranged
investigations as set out below. The mother has now returned with the baby to discuss the results and your advice
about treatment.
Investigation results
• Serum bilirubin
~ Conjugated:
Total: 250 umol/L
less than 10 umol/L
• Neonatal thyroid screening
normal
• Urine culture
sterile
• Full Blood Examination (FBE)
normal
YOUR TASKS ARE TO:
• Obtain any further necessary history you require. You should not take more than 2-3 minutes to do this.
• Discuss the results of investigations with the mother.
• Explain the diagnosis to her and advise about future management.
The Performance Guidelines for Condition 030 can be found on page 156
143
031-032
Candidate Information and Tasks
Condition 031
A convulsion in a 14-month-old boy
CANDIDATE INFORMATION AND TASKS
Benjamin, a 14-month-old boy, has been brought in to the hospital Emergency Department by his
parent following an episode at home the previous evening. His parent explains that he had been
unwell all day with a high fever (40 °C), and while he was being cuddled, he was staring and did
not respond to his name. They noted that his body twitched all over for several seconds and the
whole episode lasted 60 seconds. He then went off to sleep and slept for the rest of the night.
Examination findings
Benjamin is alert and normal neurologically. He has a low grade fever and signs of an upper j
respiratory tract infection.
YOUR TASKS ARE TO:
•
Take any further history to ascertain the most likely cause for this episode.
•
Explain your diagnosis and subsequent management to the child's parent.
The Performance Guidelines for Condition 031 can be found on page 159
Condition 032
Loud and disruptive behaviour of a 6-year-old boy
CANDIDATE INFORMATION AND TASKS
You are seeing a 6-year-old boy, Jonathan, for the first time with his mother, who complains how
active he is. He is in his second year at school, and his teacher has commented that he is
disruptive and loud in class.
YOUR TASKS ARE TO:
•
Take a focused history from the mother to determine the possible causes for the child's
presentation.
•
Indicate to the mother your probable diagnosis and a brief plan of management. The
Performance Guidelines for Condition 032 can be found on page 161
144
033-034
Candidate Information and Tasks
Condition 033
Tremor in a 40-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 40-year-old man who is consulting
you because of a tremor ('the shakes').
YOUR TASKS ARE TO:
• Take a focused history about his condition.
• After completing the history, discuss possible diagnoses with the patient.
• The examiner will then question you about the physical findings you would check to clarify
the diagnosis, and any investigations you would arrange.
The Performance Guidelines for Condition 033 can be found on page 164
Condition 034
Headache in a 35-year-old woman
CANDIDATE INFORMATION AND TASKS
Your patient, a 35-year-old woman, is consulting you in the Emergency Department of the local
hospital about headaches. You have not seen the patient before.
YOUR TASKS ARE TO:
• Take a focused history from the patient.
• Request from the examiner the essential features of the physical examination you would look
for in this patient as the next stage in diagnosis. The examiner will inform you of the results.
• Tell the patient what you consider to be the most likely diagnosis and what investigations, if
any, should be undertaken.
The Performance Guidelines for Condition 034 can be found on page 167
145
035
Candidate Information and Tasks
Condition 035
Lethargy in a 50-year-old woman
CANDIDATE INFORMATION AND TASKS
You are consulting in a general practice setting. Your next patient is a middle-aged widow (see
Figures 1 and 2 below) who is presenting for a 'check-up'. She looks apathetic and lethargic on
first impression.
YOUR TASKS ARE TO:
•
Take a focused history.
•
Ask the examiner for the results you would wish to elicit on a focused physical
examination.
• Give your diagnosis and differential diagnosis to the examiner, and indicate what further
investigations you would require.
CONDITION 035. FIGURE 1.
CONDITION 035. FIGURE 2
The Performance Guidelines for Condition 035 can be found on page 170
146
Candidate
Information
036
and
Tasks
Condition 036
Syncope in a 52-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 52-year-old technician who is
consulting you about recent transient loss of consciousness.
YOUR TASKS ARE TO:
• Take a history from the patient.
• Ask the examiner for the findings of the focused physical examination you would perform.
• Tell the examiner your diagnosis and the reason(s) for this.
• Indicate to the patient how you would proceed in your further assessment of his condition.
The Performance Guidelines for Condition 036 can be found on page 173
147
Condition 037
A painful penile rash in a 23-year-old man
CANDIDATE INFORMATION AND TASKS
You are the Hospital Medical Officer (HMO) in a hospital primary care clinic. A 23-year-old man
presents with penile pain and a penile rash.
YOUR TASKS ARE TO:
•
Take a focused history to assess the presenting problem.
•
Explain to the patient your provisional diagnosis and recommended management.
•
The penis appears as in the illustration below.
CONDITION 037. FIGURE 1.
The Performance Guidelines for Condition 037 can be found on page 177
148
038
Candidate
Information
and
Tasks
Condition 038
Primary amenorrhoea in an 18-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is an 18-year-old woman who is
concerned because she has never had a menstrual period.
YOUR TASKS ARE TO:
• Take any further relevant history you require.
• Ask the examiner for relevant findings you wish to ascertain on general and gynaecologic
examination.
• Advise the examiner of investigations you wish to order and your provisional diagnosis.
• Counsel the patient appropriately.
The Performance Guidelines for Condition 038 can be found on page 180
149
039
Candidate Information and Tasks
Condition 039
A skin lesion on the cheek of a 50-year-old man
CANDIDATE INFORMATION AND TASKS
You are the Hospital Medical Officer (HMO) in a hospital primary care clinic. A retired
50-year-old builder presents with a skin lesion on his right cheek.
YOUR TASKS ARE TO:
•
Assess the lesion by a focused history and physical examination.
•
Present your case summary and diagnosis to the examiner.
•
Explain to the patient your recommended management.
•
The lesion appears as in the illustration below.
CONDITION 039. FIGURE 1.
The Performance Guidelines for Condition 039 can be found on page 182
150
Candidate
Information
040
and
Tasks
Condition 040
A pigmented mole on the trunk of a 30-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. A fair complexioned 30-year-old schoolteacher seeks
advice concerning a 'mole' on her trunk. The skin lesion appears as in the illustration of her
back shown below.
YOUR TASKS ARE TO:
• Assess the lesion by a focused history and physical examination.
• Explain to the patient your diagnosis and recommended management.
CONDITION 040. FIGURE
The Performance Guidelines for Condition 040 can be found on page 184
151
041
Candidate Information and Tasks
Condition 041
An itchy rash on the hands of a 19-year-old woman
CANDIDATE INFORMATION AND TASKS
You are a Hospital Medical Officer (HMO) in a general medical outpatient clinic. A 19-year-old female
computer student presents with an itchy rash on her hands. The rash has been present for about one week
and appears as shown in the photograph. There are no other abnormal examination findings apart from the
rash.
YOUR TASKS ARE TO:
•
Take a further focused history.
•
Explain the most likely diagnosis to the patient and how this can be confirmed.
•
Advise the patient about treatment.
CONDITION 041. FIGURE 1.
The Performance Guidelines for Condition 041 can be found on page 186
152
Candidate
Information
042
and
Tasks
Condition 042
Red painful dry hands in a 30-year-old bricklayer
CANDIDATE INFORMATION AND TASKS
You are the Hospital Medical Officer (HMO) in a hospital primary care clinic. A 30-year-old man presents with
red dry hands. The rash appears as in the illustration below, and is on the front and back of both hands
YOUR TASKS ARE TO:
• Take a history about the presenting problem.
• Explain to him your diagnosis and the possible causes of the condition.
• Outline your management of the problem.
CONDITION 042. FIGURE 1.
The Performance Guidelines for Condition 042 can be found on page 189
153
043
Candidate Information and Tasks
Condition 043
Swelling of both ankles in a 53-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. The patient you are about to see is a 53-year-old clerical
worker who is consulting you about bilateral swollen ankles, as illustrated below.
YOUR TASKS ARE TO:
\
•
Take a relevant history from the patient (you have five minutes to do this).
•
Tell the patient your working diagnosis as to why the ankles are swollen after concluding
the history.
•
Describe to the examiner the essential features you would look for in physical
examination to confirm your provisional diagnosis.
CONDITION 043. FIGURE 1.
The Performance Guidelines for Condition 043 can be found on page 191
154
2-A
The Diagnostic Process —
History-taking and Problem-solving
2-A The Diagnostic Process — History-taking and Problem-solving
Performance Guidelines
MCAT 030-043
30
Jaundice in a breastfed infant
31
A convulsion in a 14-month-old boy
32
Loud and disruptive behaviour of a 6-year-old boy
33
Tremor in a 40-year-old man
34
Headache in a 35-year-old woman
35
Lethargy in a 50-year-old woman
36
Syncope in a 52-year-old man
37
A painful penile rash in a 23-year-old man
38
Primary amenorrhoea in an 18-year-old woman
39
A skin lesion on the cheek of a 50-year-old man
40
A pigmented mole on the trunk of a 30-year-old woman
41
An itchy rash on the hands of a 19-year-old woman
42
Red painful dry hands in a 30-year-old bricklayer
43
Swelling of both ankles in a 53-year-old woman
155
030
Performance
Guidelines
The examiner will have instructed the parent as follows:
Condition 030
Jaundice in a breastfed infant
AIMS OF STATION
To assess the candidate's knowledge of the causes of persisting neonatal jaundice, ability to make an
appropriate diagnosis and to convey this to the patient
This is your first baby. You have always intended to breastfeed, and you established breastfeeding
successfully. Baby Helen has been normal in all respects since birth. She has gained weight and is having
normal bowel actions — motions and urine are both normally coloured. You are a healthy, breastfeeding
mother, nonsmoker, on no medication.
Questions to ask unless already covered:
•
'Does Helen need to go under those lights again?'
•
‘Is t h e r e s o m e t h i n g w r o n g w i t h m y m i l k , s h o u l d I s t o p b r e a s t f e e d i n g ? '
•
If the candidate indicates that breastfeeding should be ceased for 1-2 days to see if the jaundice
decreases, ask ' W i l l t h i s a f f e c t m y c a p a c i t y t o c o n t i n u e b r e a s t f e e d i n g ? '
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should recognise the significance of the baby's unconjugated hyperbilirubinaemia and come to
the most likely diagnosis (breastmilk jaundice) without need for further investigations. Establishing that a well
baby with persisting jaundice has normal-coloured urine and motions and no abnormality on examination
virtually clinches the diagnosis.
The candidate should explain that:
•
The most likely diagnosis is breast milk jaundice.
•
The condition is self-limiting and requires no treatment.
•
The diagnosis can be confirmed by suspending (not stopping) breastfeeding for 24-48 hours which will
result in a fall in the serum bilirubin after which breastfeeding can be continued. This is acceptable but not
necessary.
•
The mother should be advised to express her milk in order to maintain lactation if temporary suspension of
breastfeeding is advised.
•
Emphasise that there is nothing wrong with her milk. No treatment is indicated and further phototherapy is
not indicated.
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KEY ISSUES
• Establishing that urine and stools are of normal colour.
• Accurate interpretation of important pathology results.
• Reassurance to mother that her milk is not harmful to her baby.
• Accurate explanation of the possible causes for the jaundice and logically excluding other important
diagnoses.
• Not appreciating the significance of predominant unconjugated hyperbilirubinaemia and insisting that the
baby has biliary atresia or haemolytic disease.
• Insisting that the breast milk is unsatisfactory for the baby and recommending permanent cessation of
breastfeeding.
Jaundice in the newborn is very common, affecting at least 50% of full term infants and a significantly higher
proportion of premature infants. Generally termed physiological jaundice, this is an adaptation process to
extrauterine life that takes some days to mature. Most physiological jaundice resolves by the end of the first
week of life in full term infants and up to 10 days to a fortnight in preterm infants.
With such a common condition, guidelines are therefore required to determine what aspects of jaundice fall
outside this physiological range. There are a multitude of causes for jaundice besides physiological jaundice
and all must be considered before assuming that the jaundice has a benign origin.
However, jaundice generally can be considered pathological if it occurs outside the above age range or is more
pronounced than expected. Usually physiological jaundice does not become obvious in full term infants until
day three of life and by late day two in premature infants. Jaundice that is manifest in the first 24 hours of life
usually has a pathological cause and this must be sought.
The most common cause for this in our community is a haemolytic process, usually ABO incompatibility
although there are several other more rare causes of haemolysis that may also present at this time (such as
hereditary spherocytosis and glucose-6-phosphate dehydrogenase [G6PD] deficiency). Rh isoimmunisation is
usually known prior to birth from the screening tests done on the mother during her pregnancy.
The other extreme of the natural history of jaundice is prolonged jaundice, that is. jaundice that persists longer
than the time when it would have been expected. There are many possible causes for prolonged jaundice
which can usually be differentiated by whether the jaundice is predominantly u n c o n j u g a t e d or
c o n j u g a t e d , the latter often indicating a more significant aetiology, for example, biliary atresia.
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Guidelines
Breast milk jaundice fits into the unconjugated variety but should be considered as a diagnosis by
exclusion of the other important causes of unconjugated hyperbilirubinaemia. There are, however, important
clinical features that also would support this diagnosis Obviously the babies are breastfed, but are thriving
and gaining weight well. Their bowel motions and urine are normal colour, a feature that must be determined
when assessing these infants Physical examination, except for the jaundice, is entirely normal and important
investigations to exclude other causes, for example, hypothyroidism, are normal.
Breast milk jaundice is a benign condition, which requires no treatment except explanation and support.
Breastfeeding should not be interrupted although some authorities indicate that the diagnosis can be
confirmed by ceasing breastfeeding temporarily and demonstrating a significant fall in the bilirubin level. This
is rarely necessary and tends to give the message to young mothers that their milk is harmful to their infant,
which is not true.
The cause is unknown, with many theories expounded in an attempt to explain this phenomenon, although it
is thought to be due to a factor in breast milk that causes increased enteric absorption of bilirubin. The
jaundice may persist for up to three months but over that time the baby thrives and remains well. Despite its
persistence for many weeks in some infants it may disappear in just a few days in others.
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Guidelines
Condition 031
A convulsion in a 14-month-old boy
AIMS OF STATION
To assess the candidate's ability to relate appropriately with the parent of a boy who had a febrile convulsion
the previous evening, by taking a relevant history making and explaining the diagnosis, and advising
preventive measures.
The examiner will have instructed the parent as follows
You are the parent of 14-month-old Benjamin who had a convulsion with generalised twitching the previous
evening. You did not know what the episode was at the time but as he went off to sleep, you let him sleep
and brought him in the next day to be checked. He now seems well and is back to normal, but you are
concerned as to what the episode was as it frightened you when it occurred.
If asked about his development, reply that all has been normal.
• His birth history was normal — born at term weighing 3600 g (good Apgar birth scores).
• He has been well since birth and has not been sick until last night.
• There is no family history of epilepsy.
• Your own younger sister had a similar episode when aged two years, but has had no further problems
(this is potentially important information but should be provided only if the candidate asks).
Opening statement
Benjamin seems fine now that he is less feverish. '
Questions to ask if not already covered:
• 'Why would he have this episode?'
• If the candidate indicates that this was a febrile convulsion, then ask 'what is a febrile convulsion?'
• ‘Is this epilepsy? Should he have some medicine for this?'
• 'Does he need to have any tests done?'
• ‘Will it occur again?'
•
‘What should we do if it does occur again or when he gets a high temperature?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
Although this boy has had a simple febrile convulsion, the candidate should question specifically to exclude
any risk factors for epilepsy or recurrence, including birth history developmental history, and family history of
febrile convulsions or epilepsy.
The candidate should:
•
Indicate that this is most likely a simple febrile convulsion
• Explain that a febrile convulsion is a common reaction to fever in young children — about 3% of the
population have a seizure associated with fever.
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•
Emphasise that generally this is a benign condition.
•
Point out that the condition commonly runs in families.
•
Explain that the fever is almost always caused by a viral infection, which would usually manifest as an upper
respiratory tract infection in an adult, but immature brains are susceptible to the effects of high fever.
•
Explain that such convulsions do not cause brain damage or subsequent epilepsy.
•
Give advice as to a 30% risk of recurrence especially in the first 24 hours after this episode and advise the parent
what to do if it occurred again (tepid sponging and antipyretics when he is feverish).
•
Advise against any drug treatment (except an antipyretic), as this is unnecessary.
•
Reassure that this is most unlikely to be epilepsy. Only around 3% of children who have had febrile convulsions
subsequently develop epilepsy, being mainly in the high risk group (positive family history of epilepsy, prolonged
convulsion, a focal element, abnormal development before the seizure).
•
Candidate may mention the use of rectal diazepam for recurrent febrile seizures, but this should be reserved for
special circumstances and its use is not without risk.
KEY ISSUES
•
Appropriate questioning and history-taking.
•
Appropriate education and reassurance.
•
Advice on preventive measures.
CRITICAL ERROR
•
Suggesting on the strength of this episode of a brief febrile convulsion that he has epilepsy.
COMMENTARY
In this scenario, the dominant cue is the recognition of the change in sensorium in this child while he has a high fever.
Pattern recognition leads to the likely diagnosis and should allow the candidate to make a definitive diagnosis and
be confident in the advice given to the parent. The scenario tests not only knowledge of a common condition, but also
skill in being able to impart a logical explanation in language that the parent can understand without causing alarm. It
also requires reassurance and confidence in the diagnosis. While epilepsy may be raised as a possibility, the clinical
features at the time, the normal appearance of the child when examined and absence of risk factors, make this highly
unlikely at this stage. The candidate should therefore recognise this as a simple febrile convulsion with an excellent
prognosis.
A simple febrile convulsion is a common condition and candidates must be aware of risk factors that would suggest an
alternative diagnosis of epilepsy should be considered: prolonged convulsion lasting greater than 15 minutes; a focal
element to the seizure; a family history of epilepsy; or abnormal neurological behaviour in the child prior to the seizure.
Any of these features would throw doubt on the diagnosis of simple febrile convulsion. This is the process of
diagnostic reasoning.
None of these features is present in this child and hence the diagnosis is clearly most likely to be a simple febrile
convulsion.
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Condition 032
Loud and disruptive behaviour of a 6-year-old boy
AIMS OF STATION
To ensure that the candidate considers all other possibilities as to why Jonathan is behaving as
he is, before concluding that he most likely has attention deficit hyperactivity disorder (ADHD).
The candidate will therefore be assessed on ability to ask pertinent questions that confidently
exclude other important diagnoses.
The examiner will have instructed the parent as follows:
You are the mother of Jonathan aged six years and are concerned about how active he is. Both
teachers he has had in the first two years at school have commented on how disruptive he is in
class.
The candidate is required to take a concise history from you to try to determine the possible
causes for Jonathan's behaviour. Listed below are suggested answers that you should provide
in response to questions from the candidate.
At six minutes, the examiner will indicate to you to ask the candidate what is the problem and
how should Jonathan be managed.
For ease of response, questions are grouped based on how the candidate may question you.
Hyperactivity and other associated symptoms
• Jonathan has always been very active from the time he walked (13 months).
• Even as an infant he was a restless, irritable baby who was difficult to feed.
• His sleeping pattern since birth has been very bizarre with frequent waking.
• He is impulsive and often acts without thinking what the consequences might be.
• He is easily frustrated and rarely plays at any particular activity for any length of time.
• His teacher complains he never sits still and tends to wander around the classroom, which at
times is disruptive to the rest of the class.
School progress
• His reading and learning are behind the level of the other children in the class.
• He constantly talks loudly in class.
• He tends to interrupt frequently and has great difficulty taking turns.
• He has trouble keeping friends, as he is so boisterous.
• His preschool teacher commented on similar behaviour.
Home situation
• He is the first in the family; he has a four and a half-year-old sister who already is reading,
almost to the level that Jonathan has achieved.
• He lives in a caring family and you have tried just about anything that anyone has suggested
to help him.
• The description given by the teachers is exactly as he is at home as well.
• He cannot concentrate on tasks for any length of time.
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•
He tends to disrupt his younger sister's play.
•
He demands attention from you frequently, not being able to take 'no' for an answer which you
are finding exhausting.
•
You consider your home situation to be very stable with both parents active in supporting each
other and rearing the children. There are no parental interpersonal problems.
Family history
•
His father is a plumber who struggled at school, left school as early as he could to take up his
apprenticeship and who found it difficult to study at Technical College (TAFE).
•
Father is described by his own parents as being very similar to Jonathan at Jonathans age.
•
Father even now tends to leave tasks unfinished around the home. This is not a problem at
work where he is supervised.
•
There is no family history of intellectual disabilities or deafness.
•
Mother was previously a secretary for a builders' supply firm.
Pregnancy
•
You had a normal pregnancy. Jonathan's birth weight was 3600 g at term after normal labour;
good Apgar scores; only mild and transient jaundice in the neonatal period.
•
You noticed very active movements even in utero compared to when you were pregnant with
his sister.
•
Jonathan thrived and gained weight well, development was normal except slow in speech
development compared to his younger sister.
Past medical history
•
Physically well.
•
No serious illnesses (in particular no history of meningitis, encephalitis).
•
No history of head injury, although he appears uncoordinated and constantly seems to run
into things.
•
You have had his hearing and vision tested and were assured both were normal (give this
information ONLY if asked).
When indicated by the examiner, you should ask: ‘What do you think is causing this, and
what can we do about it?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
This scenario is designed firstly to assess the candidate's ability to explore the reasons a ! child
may present with hyperactivity. While it has been written to suggest ADHD, the assessment is
essentially based on whether the candidate approaches the problem in a logical manner,
exploring all other possibilities for the behaviour. It is not at all critical that the correct diagnosis is
made, but rather that the child's history is fully explored to exclude:
•
Physical or congenital lesions.
•
Behaviour secondary to neonatal problems.
•
Subsequent medical or physical illnesses including significant head injury.
•
Reaction to unfavourable home circumstances or child rearing and family environment.
•
Difficulties in the child's adaptation to school.
•
A visual or auditory problem.
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Importantly, the candidate should question as to similar behaviour in other family members (see note on
father's history)
In outlining briefly the probable diagnosis and plan of management, the candidate should:
• Give a logical explanation as to the possible causes for Jonathan's presentation having excluded organic
pathology and indicate that ADHD is a strong possibility (the diagnosis of ADHD is not essential to pass,
provided history has been satisfactory).
• Suggest a neurodevelopmental assessment be performed with an experienced psychologist if possible.
• If hearing and vision have not been enquired about, suggest having hearing and vision assessed (can then be
told this has been done and is normal).
• Briefly outline the management of ADHD by behavioural modification with or without stimulant medication.
• Indicate willingness to review and monitor progress in a supportive manner.
• Obtaining a logical and focused history to exclude various possible causes for Jonathan's behaviour.
• Showing empathy with the parent's frustration.
• Having a clear approach to the management plan.
CRITICAL ERROR
• Coming to a premature conclusion of ADHD and recommending stimulant medication, without having explored the
history for other causes.
This presentation of childhood hyperactivity is common in both paediatric and general practice and skill is required
to sort out the myriad of causes for the behaviour exhibited. This is done by a careful history exploring the child's
past history, current developmental status, and family and school situation. Monitoring progress over several
consultations may be required to give a positive diagnosis of ADHD.
The great majority of children presenting in this manner have major family dynamics problems and the scenario
could easily have been modified to indicate this. However the current scenario is designed to indicate that a
diagnosis of ADHD is by exclusion of all the other causes for this symptom; and that stimulant medication is not the
immediate treatment in this situation, a tendency for which has developed in the general community and is often the
expectation of family members who have spoken with neighbours or read the lay press. The doctor is often under
great pressure to prescribe these medications at first visit and this should be resisted.
There are no specific tests available that make a diagnosis of ADHD. Diagnosis is made from the pattern of
behaviour, which can be confirmed by psychometric testing. While behavioural modification is recommended,
parents have often already arranged this prior to the consultation, and also have often tried a variety of exclusion
diets that in some cases may be helpful, but overall are not. Parents should be supported to try exclusion diets if
they are keen to institute them; but the practitioner should monitor progress and make a critical appraisal as to the
success or otherwise of this treatment and support the parent accordingly.
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Condition 033
Tremor in a 40-year-old man
AIMS OF STATION
To assess the candidates skill in defining a presenting symptom of tremor, making a probability
diagnosis from the history and selecting with discrimination which aspects of physical
examination and investigations will clarify the diagnosis.
The examiner will have instructed the patient as follows:
You are a 40-year-old man who has consulted a general practitioner complaining of the shakes'.
The doctor will seek details of your symptoms and will ask questions about your health status,
medical and social history.
Opening statement
'I've got the shakes doctor. I spill my drink sometimes'.
Provide the following information without prompting:
‘I have had the shakes since my early 20s. It happens when I get nervous about
something, but it hasn't been a problem until recently (6-12 months). Sometimes
my head shakes and often I spill my drink when I put a glass to my mouth. I feel
much better after a couple of beers. Recently I heard something about Parkinson's
disease which can cause the shakes, so I thought I should see a doctor'.
In response to further questioning:
'It doesn't seem to bother me when I get up in the morning and doesn't stop me
going to sleep. It can go away for a few days then comes back. Seems to be when I
am doing something with my hands like using a knife and fork, or writing. The
newspaper shakes when I am trying to read it. Sometimes I have trouble lighting a
cigarette. My right hand is the worst. I don't have any stiffness and I don't have
trouble moving from one position to another, nor in walking. I can control the
shakes by gripping things firmly. '
•
You have noted that your hands and fingers shake if you hold your arms out in front of your
body. You may ask the doctor if your voice could be affected because you have noticed some
shakiness in your voice, but only occasionally and of minor degree.
•
Shakes were first noted in your dominant right hand. Left hand is less affected and not until
recently.
•
You have always been a tense and nervy person, stress makes the shakes worse. You like to
have a 'few beers' especially at the weekends but never get 'drunk'.
•
Deny any other symptoms affecting the central nervous system, cardiovascular system,
respiratory, gastrointestinal or urinary systems, but admit to a diminished libido and difficulty
in maintaining an erection if asked directly or if the doctor provides an opportunity for you to
do so. No loss of weight.
•
You work as a storeman. You are married with two teenage children. You smoke 10-15
cigarettes daily and drink up to five 375 mL cans of full strength beer on most days. You have
had no serious illnesses or operations.
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• Family history: Father died from lung cancer aged 58 years. He also used to get the 'shakes'. He was a
non-drinker. Mother died of stroke aged 62 years. Her father had Parkinson disease. Your brother, sister, wife and
two children all keep in good health.
• You are anxious about the cause of your symptoms. You are ignorant of long term harmful effects of alcohol. If the
doctor facilitates your story and maintains an open-ended approach whilst you are giving details of the shakes',
continue to amplify your symptoms. If, however, the doctor controls the interview too early, by only asking
questions and not listening to your story, just answer the questions asked. If asked, admit to concern about
Parkinson disease because of your grandfather. The same applies to your alcohol use: be reluctant to confirm or
reveal the true level of your alcohol intake. You have never been charged with exceeding .05, and have never had
an injury or motor accident associated with alcohol use.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should assess the patient's tremor as follows:
History (see patient instructions)
By the process of listening (using an open-ended approach followed by direct questioning), to develop the two most
likely diagnostic pathways: benign tremor and tremor associated with heavy drinking. Other differential diagnoses
such as an anxiety state. Parkinsonism and thyrotoxicosis are much less likely from the history. Past, family and
social histories should be sought.
Discussion with patient after the history
This may or may not be specific. It is included to assess the candidate's diagnostic approach to the patient.
Knowledgeable candidates will be reassuring because of their confidence in the likelihood of a benign tremor.
Questions from the examiner after six minutes with expected responses:
• What are your differential diagnoses?'
~ Benign or essential tremor (familial); effects of heavy drinking: Parkinson disease: cerebellar disease; thyrotoxicosis
• 'At this stage what do you consider to be the most likely diagnosis?'
~ Benign tremor or alcoholic tremor
• "What are the essential physical signs you would look for in this patient?'
~ Hepatomegaly and any stigmata of chronic liver disease, cerebellar signs, increased muscle tone, tachycardia,
cardiomegaly
• 'What investigations would you advise assuming the physical examination to be normal?'
~ Full Blood Examination (FBE), liver function tests, possibly thyroid function tests.
• Approach to patient — establishing trust and confidence by having a non-judgmental attitude, listening to
patient's concerns and being reassuring.
• History — comprehensive but focused, using appropriate communication skills Diagnosis must include benign
tremor and alcoholic tremor.
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Answer to examiner questions
~ Physical examination should include checking for hepatomegaly and stigmata of
chronic liver disease, tachycardia and cerebellar signs.
~ Investigations — must advise liver function tests, but thyroid function tests not
essential.
CRITICAL ERRORS
Failure to indicate the most likely diagnosis is essential tremor.
Failure to advise liver function tests.
COMMENTARY
Essential tremor is one of the most common neurological disorders, with prevalence increasing
with age. An autosomal dominant family history is present in 50-60% of patients and the genetic
basis is unknown. Functional imaging reveals abnormal cerebellar activity and no histological or
structural changes have been identified. Age of onset is bimodal. with the largest peak in the
second decade, and a smaller peak in the fifth decade. The characteristic finding is a postural
and kinetic tremor of the upper limbs which interferes with fine manual tasks. Head tremor is also
present in 40%. Less commonly legs are involved or there is voice tremulousness. With
advancing age, the tremor frequency often slows and amplitude increases, leading to a coarse
tremor which can be disabling, although this is uncommon.
Patients with benign essential tremor often drink as a means of controlling the tremor as alcohol
has an ameliorating effect in 50% of cases.
In this case, the patient may also be suffering from the effects of prolonged heavy drinking. This
would require further assessment with the investigations recommended above.
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Condition 034
Headache in a 35-year-old woman
AIMS OF STATION
To assess the candidate's communication skills in defining the nature of the patient's headache.
In addition, knowledge of types and causes of headache and the essential components of an
appropriately focused physical examination are tested.
Examiner Instructions
The examiner will have instructed the patient as follows:
You are consulting the doctor about headaches. You are aged 35 years and work as a
telecommunications manager. You have not seen this doctor before. Use the following
information to respond to the doctor's enquiries.
Opening Statement
’I want to find out what is causing my headaches.'
History without prompting:
You have been suffering from intermittent headaches for at least five years, attacks occurring
irregularly every few months, lasting for a few days. They are temporarily relieved by Panadol®,
up to six a day at a maximum. You have not previously sought advice. You are concerned
because in the past few months, the headaches have occurred more often, that is, every few
days, and now last longer, for most of the day.
In response to questioning:
• The headache has not increased in intensity — only in frequency and duration.
• It feels like a tight band or pressure around or on top of your head, or a dull ache, not
pulsating.
• It affects the forehead and both the temples and radiates to the back of the head.
• It usually starts in the morning and lasts all day, getting worse by evening, not interfering with
sleep.
• The pain reduces after taking Panadol®, after your evening meal, and with rest and local heat.
• On a scale from 1 to 10, the headache pain rates about 3 to 4.
• Headaches are not accompanied by nausea, vomiting, visual disturbance, photophobia, or
associated with menstrual cycle.
• They are not related to posture, exercise or position of head or neck.
• You can continue to work and to do household duties during attacks. You have lost no time
from work.
Review of General Health
• You consider your general health to be satisfactory.
• You do not often seek medical advice.
• You do not regard yourself as a 'nervous' type and have not noticed any change in your usual
mood.
• Your marriage and family life is satisfactory.
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•
Negative response to questions about all body systems except as already stated.
•
Menstrual cycle normal.
Other Significant Information
You are very busy, rush through work, domestic and family duties, and have less relaxation time now. You are
a perfectionist by nature and are finding it more difficult to cope with all of the activities of your growing family.
You have a dual income and no financial problems. You recently saw a TV documentary about a
person who had a cerebral tumour.
Current medication — Panadol® (paracetamol) 500 mg 1-2 tablets to relieve headache taken not more than
three times daily. No known drug sensitivities. Nonsmoker. Alcohol is used occasionally at weekends.
Appear worried and tense and display concern. You had previously been complacent about the headache.
You are now seriously worried about having a cerebral tumour. Indicate the site of the headache (forehead,
temples, and occiput). Be prepared to be reassured by the doctor if history and physical examination are
adequate. If not, press the doctor to have tests or be referred to a specialist. Note that you are also at a peak in
your family responsibilities.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should assess the patient's headache along the following lines:
History (see patient responses)
•
Characteristics of headaches, including assessment of severity.
•
Recent change in chronic condition.
•
Identify acute patient concern that a serious cause may be present (cerebral tumour).
•
Recognition of typical characteristics of tension headache.
•
Identification of relevant psychosocial and environment factors (lifestyle stress)
Essential features which candidates should look for on physical examination (supplied from examiner on
request)
•
Inspection of head and neck and testing for neck stiffness.
•
Neurological examination may be limited but must include ophthalmoscopy.
•
Cardiovascular examination must include blood pressure.
THE EXAMINER SHOULD INFORM THE CANDIDATE THAT NO ABNORMALITIES ARE FOUND ON
PHYSICAL EXAMINATION.
Communication skills
•
Use of facilitation, active listening and relevant enquiry, to fully define the nature of the headache and its
associations;
•
Communicate understanding and concern that there is a recent change in a chronic problem; and
•
facilitate disclosure of relevant psychosocial history and worry about brain tumour. Diagnosis/Differential
Diagnosis
•
Tension headache (muscle contraction headache) is the most likely diagnosis. Other diagnostic
possibilities include:
~ Migraine.
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~ Cluster headache.
~ Raised intracranial pressure (excluded by history typical of tension headache and
negative examination findings).
~ Cervical spondylosis.
Patient counselling
• Headache is of muscle contraction type due to tension and associated with personality and daily pressures of work
and family life. No special investigations are indicated at this stage. Referral to neurologist for opinion is
acceptable. Reassurance should be strongly given with offer to follow up results of this first contact with the doctor.
• Investigations are not indicated.
• Discussion and education about the role and function of investigations is indicated.
• Referral for computed tomography (CT) brain or magnetic resonance imaging (MRI) would detract from overall
performance but is not a key issue especially if a patient requires additional reassurance that the headache is not
due to a cerebral tumour. X-ray skull is not indicated.
KEY ISSUES
• Use of communication skills to elicit the most relevant and important points in the history.
• Focused physical examination in a patient complaining of longstanding headache.
• Confidence in diagnosis of tension headache based on typical history, normal physical examination, patient
concern about a serious cause and lifestyle factors.
• Recourse to investigations (CT or MRI) unnecessary at this stage but allowable to diminish patient concern.
• Arrange followup to assess therapeutic effect of this initial assessment.
CRITICAL ERRORS
• Failure to request blood pressure and ophthalmoscopy findings.
• Failure to indicate the most likely cause is tension headache and that a serious cause is most unlikely.
COMMENTARY
This case is deliberately set in a hospital Emergency Department where the time constraint matches the eight minutes
allowed for the candidate to complete the focused tasks set.
The candidate who takes immediate control over the interview by asking a series of direct questions about site,
duration, intensity etc. may successfully reach the diagnosis of tension headache, but is likely to overlook the patient's
recent concern about a serious cause and miss the real cause (lifestyle factors) with two consequences:
• referral for unnecessary investigations which also increases the patients anxiety about a serious cause; and
• missing the opportunity to convert the diagnostic approach into the appropriate therapy by improving self
understanding by the patient.
The initial response from the candidate should be to facilitate the history given by the patient with an open-ended
approach, listening, and encouraging the patient to tell the whole story including concerns and life situation.
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Condition 035
Lethargy in a 50-year-old woman
AIMS OF STATION
To assess the candidate's history-taking skills and diagnostic acumen in a patient with the symptoms and
signs of hypothyroidism. The case is deliberately presented as an undifferentiated problem but the patient's
initial unprompted statements should lead to the correct diagnostic pathway with confirmation of suspected
hypothyroidism by a focused selective physical examination.
Examiner Instructions
This case requires the patient to reveal the symptoms of hypothyroidism in a slow and hesitant, but
nevertheless positive manner, in response to appropriate history-taking.
The examiner will have instructed the patient as follows:
You are a 50-year-old widow.
Opening statement
'My daughter wants me to have a check-up because she says I am always tired. '
•
Respond to the doctor's enquiries as follows — w i t h o u t p r o m p t i n g .
•
You have not felt well lately (be vague about the duration).
•
You feel weak especially your arms and legs.
•
You also feel lethargic.
•
Your daughter says you are not interested in anything, go to sleep during the day and can't be bothered
talking to people.
•
Your voice has become 'croaky' — people say it has changed over the past year.
•
You are always constipated and this seems to be getting worse.
•
Your periods stopped last year and were scanty and irregular for a year before that.
•
You have put on weight.
•
Your responses are apathetic, lacking expression.
•
You are slow to react with a croaky, husky, thick voice and poor memory.
•
You respond slowly to doctor's questions, but appropriate questions evoke correct responses.
•
Do not be evasive. Show paucity of body movements.
In response to other questions:
•
No history of thyroid surgery.
•
You feel cold all the time.
•
Your hair has become thinner.
•
You find it hard to concentrate.
•
Your memory is not good.
•
You are able to manage your own personal care but everything is an effort and takes longer.
•
You get constipated if you don't take Coloxyl® regularly.
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• Your joints feel stiff and the muscles are sore.
• You wake up early in the morning and can't get back to sleep.
• Answer in the negative to any other questions about your health except to indicate that you feel you are gradually
going downhill.
• If asked, state that you have just come to stay with your daughter because you were unable to carry on living alone.
• Past medical history and family history — nothing of note. Parents died from old age.
Current medication
• 'Tonic' obtained from Pharmacist by daughter.
• Aspirin irregularly for the rheumatism.
• Dioctyl sodium 120mg (Coloxyl®) 'for my bowel' 1 or 2 tablets daily, taken for about a year.
• Physical examination — the examiner should give the findings for selective and specifically requested
components of the physical examination.
• Appearance — as illustrated
~ Looks tired and dull. Expressionless face, coarse features and skin.
~ Overweight — BMI 29 kg/m2
~ Pulse rate 56/min regular, blood pressure 130/70 mmHg
~ Thyroid not palpable
~ Skin dry sparse axillary hair
~ Cold hands and feet
~ Power and tone reduced in arms and legs
~ Reflexes sluggish with delayed ankle jerks
At six minutes the examiner will ask the candidate for the diagnosis/differential diagnosis and proposed investigation.
EXPECTATIONS OF CANDIDATE PERFORMANCE
• Diagnosis/differential diagnosis
Candidate's response to examiner's request for the diagnosis: candidate should strongly suspect
hypothyroidism as indicated by pattern recognition and from the patient's symptoms and signs. Other possibilities
such as depression, anaemia, early dementia may be mentioned but should be considered unlikely.
• Investigations
Must request thyroid function tests and full blood examination.
Key Issues
• History
• Choice and sequence of examination
• Diagnosis/differential diagnosis
• Appropriate investigations
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CRITICAL ERROR
• Failure to consider hypothyroidism in differential diagnosis.
COMMENTARY
Spontaneous atrophic hypothyroidism often gives gradually progressive symptoms as ir this
case. The pathology is destructive lymphoid infiltration of the thyroid gland leading tc atrophy
with no visible enlargement, or in some patients, associated with goitre.
Diagnosis is suspected by the constellation of symptoms and signs as exhibited in this patient
and would be confirmed by elevation of serum TSH with lowered T4 levels. The condition is an
organ-specific immune disorder and responds well to thyroxine treatment, beginning with a low
dose (50 ug daily) and increasing slowly to the dose required to restore TSH to normal.
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Condition 036
Syncope in a 52-year-old man
AIMS OF STATION
To assess the candidate's ability to take a focused history regarding transient loss of consciousness with
possible causes in mind. The candidate should also know the essential components of a selective physical
examination which should identify a probable cause and be able to specify the investigations which would
confirm the diagnosis
Examiner Instructions
The examiner will have instructed the patient as follows:
You are a 52-year-old technician who is consulting a doctor about recent transient loss of consciousness.
Opening statement
‘I was playing tennis yesterday when I suddenly blacked out. My friends thought I was dead!'
If given the opportunity by the doctor, follow with this information:
'/ was enjoying my usual Sunday morning game of tennis. It was a hot day. I had been serving
and the game was pretty fast — when I suddenly blacked out. There was no warning and I must
have 'come to' pretty quickly because my friends told me they were about to start pushing on my
chest. They couldn't tell whether I was breathing or not and they said they couldn't feel my pulse.
Anyway I woke up and felt that nothing had happened except for this graze on my elbow. I
decided not to play on although I felt ok'.
Provide the following information in response to specific, appropriate questioning:
• You feel well today.
• This was the first such attack. You have not had any previous fainting or dizzy spells
• No convulsions or fitting from your friend's description. Before or after the attack you had no palpitations or
awareness of heart beating abnormally, no vertigo, no headache, no disturbance of your vision, no
numbness or tingling.
• No one said anything about your colour.
• You had no loss of control of your bladder or bowel function during the attack.
• You get short of breath whilst playing and this has been more noticeable lately. You have attributed this to
your age. You don't get short of breath lying down or at night.
• You also have some 'muscle soreness' in your chest, which sometimes comes on when you are playing, this
has been noticed over recent months, but it is not severe and goes away when you stop playing tennis
between games. This occurs if a game is strenuous or prolonged and is a tight feeling.
• You don't feel it anywhere else, just across your chest.
• There has been no swelling of ankles.
• Negative responses to all questions reviewing body systems.
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Other significant information
•
Your last cholesterol check was three or four years ago when you last saw a doctor. You were
told that it was in the 'high normal' range and advised to reduce intake of fatty foods.
•
Blood pressure always normal.
•
No regular medication.
•
If asked about your past history, family history, habits, social history or other information,
respond as for yourself.
•
You are a mature middle-aged person without previous health concerns. Because you were
unaware of the details of yesterday's events (except for the graze on your elbow) and
because you feel so well, you are not unduly concerned.
•
Do not reveal the chest soreness or the excessive shortness of breath on exertion, without
proper enquiry from the doctor.
•
After obtaining the results of the physical examination the doctor should give you an opinion
as to the cause of your symptoms. Accept what the doctor says.
EXPECTATIONS OF CANDIDATE PERFORMANCE
History
•
Eliciting the triad of symptoms of syncope, exertional dyspnoea and angina which raise a
high index of suspicion of aortic stenosis.
•
Excluding symptoms suggestive of other causes, particularly epilepsy (see differential
diagnosis).
Physical examination (provide these on request)
Cardiovascular examination
•
pulse
•
blood pressure
•
jugular venous pressure
•
auscultation of neck
•
heart
~ prominent left ventricular impulse
~ apex beat not displaced
~ ejection systolic murmur (3/6) best heard over aortic area
~ radiates to neck and apex
70/min regular
118/88 mmHg lying and standing
normal
- systolic bruit (transmitted) over both carotid
arteries at base of neck
— loudest on right.
Neurological examination
normal
There are no other abnormal physical findings.
The examiner should limit the candidate's requests for physical examination findings to the
cardiovascular and central nervous systems (the latter is normal).
After six minutes ask the candidate the most likely diagnosis, then direct the candidate to
discuss these with patient.
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Diagnosis (opinion to patient)
That the loss of consciousness was most likely due to an abnormality in one of the heart valves
which requires investigation by ECG and echocardiogram (X-ray chest and full blood
examination are addtionally acceptable), and referral to a cardiologist (may use term aortic
stenosis with further explanation).
• History must elicit details of syncope, exertional dyspnoea and chest discomfort.
• Examination must request pulse, blood pressure, presence of carotid and cardiac murmurs.
• Choice of investigations must include ECG, and echocardiogram
• Diagnosis must recognise that this patient's syncope has a serious underlying cause.
Syncopal episodes are common, accounting for 3-5% of attendances at Emergency
• Failure to ask about cardiovascular symptoms.
• Failure to request examination findings for both carotid and cardiac bruits.
Departments and affecting 15-25% of the population over any 10 year period. The prevalence of
syncope increases with age and can cause significant morbidity in the elderly. An attack of
syncope is associated with major morbidity such as fractures and motor vehicle accidents in 6%
of cases, and minor injuries such as lacerations and bruising occur in about a third of cases. It is
essential to distinguish syncope from seizures and syncope caused by benign causes from
syncope caused by serious underlying illness. This middle-aged patient with syncope evinces
the triad of symptoms classical of aortic stenosis.
Causes of syncope include neurally-mediated syndromes (such as vasovagal/ vasodepressor
syncope and carotid sinus syncope), orthostatic syncope (including volume depletion, drugs,
autonomic failure syndromes), cardiac arrhythmias (bradycardias and tachycardias), structural
heart disease and cerebrovascular disease.
Taking a careful history, including an eyewitness account, is critically important in syncope and
can prevent inappropriate and costly investigations. The history in this middle-aged patient with
syncope has the important feature of coming on with exertion and against a background of
cardiovascular symptoms of chest pain and shortness of breath pointing towards a cardiac
cause. The absence of palpitations is against the diagnosis of cardiac arrhythmia but this could
still be a possibility on the history. The candidate is expected to use appropriate questioning to
try to exclude epilepsy and other neurological causes. Carotid sinus syncope and
vasovagal/vasodepressor syncope may be considered as differential diagnoses but other
features of these conditions are not apparent (for example, relationship with head turning or
warning symptoms).
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The next step is a careful cardiovascular examination. The candidate is expected to look for evidence of
structural heart disease, in particular for features of aortic stenosis. The examination requested should be
systematic, starting with the peripheral pulse and blood pressure, moving on to an examination of the carotid
pulses. The nature of the cardiac apex beat, and a request for details on the heart sounds and the cardiac
murmur, its characteristics, site and radiation are key findings that help to refine the diagnostic process. The
most important investigations to perform in this patient are an ECG and an echocardiogram. Referral to a
cardiologist would be an appropriate step to take.
A lack of understanding of the condition would be exhibited if a candidate requests a whole range of
investigations such as: 7 would like to perform full blood count, electrolytes, blood glucose, carotid
Doppler studies, electroencephalogram, Hotter or loop monitoring and coronary angiography. '
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Condition 037
A painful penile rash in a 23-year-old man
AIMS OF STATION
To assess ability to diagnose and manage genital herpes. This patient has penile herpes simplex. The
patient also needs to be assessed in terms of other possible sexually transmissible infections.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
Opening statement
‘I've got a problem with my penis, doctor. '
You are a carpenter. Volunteer the following history without prompting:
• You have had penile pain for two days.
• It started as intermittent tingling, but is now constant.
• You have noticed today a lumpy penile rash with blisters.
In response to questions from the doctor indicate that:
• You have had no serious past illnesses and are on no medications.
• You have no allergies.
• There is no history of mental illness.
• Sexual history — you have no steady partner. You are heterosexual and you last had sex with a woman
you met at a disco a week ago.
• Do not volunteer information about sexual behaviour unless asked specifically
Questions to be asked of the candidate unless already covered:
• ‘What is wrong with me?'
• 'What is the cause?'
• 'Can I pass it on?'
• 'How can it be treated?'
• 'Will I be cured?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate is expected to take an appropriate sexual history and to be able to identify the vesicular
penile rash as most likely due to genital herpes simplex and to confirm diagnosis by viral testing.
Testing for associated sexually transmissible infections as part of the differential diagnosis should include
Venereal Disease Research Laboratory (syphilis), chlamydial, gonococcal and HIV testing.
Patient counselling and education is important to reduce risk of transmission; and management advice
should be:
• Confirm diagnosis with virological testing.
• Explain the Cause to the patient.
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•
Assess the risk of possible exposure to other sexually transmissible infections, for which the patient should be
screened.
•
Counselling to reduce risk of transmission of any sexually transmissible infections is essential.
•
Antimicrobial therapy: reduces the length of illness and may decrease virus transmission. First clinical episodes of
genital herpes, when severe, are treated with a five day course of oral aciclovir, or similar agent.
•
Topical treatments can help symptomatic management: for example, topical povidone-iodine; lignocaine.
•
Supportive treatment: rest, salt baths, ice packs, analgesics, wear loose clothing.
•
Further investigations
~ The risk of other sexually transmissible infections, including HIV infection needs to be investigated.
~ This may involve swabbing oral, genital and anal areas for Chlamydia and other infections.
All testing needs to be done with informed consent.
KEY ISSUES
Ability to identify rash as herpes simplex.
Ability to take a sexual history and investigate possible concomitant sexually transmissible infections.
Counselling to reduce risk of further transmission of herpes simplex virus. Ability to treat herpes infection.
CRITICAL ERROR
Failure to assess for other sexually transmissible infections.
COMMENTARY
Herpes Simplex Virus (HSV) is one of a family of herpes viruses, which includes HSV 1 and HSV 2, varicella zoster
virus (VZV), Epstein-Barr virus (EBV), cytomegalovirus (CMV) and human herpes virus 6. HSV 1 and HSV 2 cause
patterns of disease which differ clinically and epidemiologically, but share some characteristics. HSV 1, HSV 2 and
herpes zoster all establish permanent latency in sensory nerve ganglia following the primary infection.
HSV 1 is more common and is usually acquired during childhood presenting most commonly as acute
gingivostomatitis, but can occur anywhere on the skin. In the eye. keratoconjunctivitis is a feared infection because it
can cause scarring of the cornea and loss of vision.
HSV 2 is largely associated with genital infection and is most common in young, sexually active adults. The risk of
infection increases with numbers of sexual partners. Transmission is by vaginal, oral or anal sex. Condoms reduce the
risk of transmission. The infection appears at the site of virus entry, on the glans penis or penile shaft in men, or on the
vulva or vaginal mucosa in women. Perianal and rectal lesions can develop as a result of anal intercourse. Primary
herpes simplex infections have an incubation period of 3-6 days but this may be longer.
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During the first attack, there may be a tingling and burning over the affected area.
• The rash is vesicular, often occurring in crops,
• After a day, the vesicles leave small red, painful ulcers. These heal within a few days.
• There may be associated fever, myalgia and local lymphadenopathy.
• The first (primary) attack lasts around two weeks.
•
•
•
•
Recurrence occurs in about 50% and may be associated with shooting pains in the buttocks and legs.
Recurrences often occur at times of stress and tiredness. Systemic manifestations are uncommon.
Recurrences are also more frequent in presence of immunosuppression including HIV infection.
HSV infection may be associated with other sexually transmissible infections.
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Performance Guidelines
Condition 038
Primary amenorrhoea in an 18-year-old woman
AIMS OF STATION
To assess the candidate's ability to define the cause of primary amenorrhoea in a young woman who has gone
through an apparently normal puberty
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You have come to see the doctor because you are worried that you have not yet had a period. You are 18 years
old.
List of appropriate answers in response to likely questions
•
Evidence of pubertal changes:
~ You had a growth spurt three years ago.
~ Breast changes started three years ago.
~ Pubic hair began to develop three years ago.
You are now of similar height to peers from school.
•
You have no history of abdominal or pelvic pain.
•
Your mother had her first period at the age of 17 years.
•
Your sister (aged 14) has not yet started to have breast development.
•
You have had no operations or significant illnesses.
•
You have never been sexually active.
Questions to ask unless already covered:
•
'Why hasn't my period started yet?'
•
'All my friends at school started years ago. Will I ever have periods?'
•
'Will I be able to have a baby?'
Examination findings from examiner
These should be given to the candidate on request for specific components of the examination.
•
Her weight is 48 kg and she has normal height for weight.
•
Breasts show Tanner stage 5 of puberty. Pubic and axillary hair also show stage 5.
•
Blood pressure 120/80 mmHg.
•
Vulval inspection — normal appearance. Hymen intact, but apparently perforate. Lower vagina above hymen
appears normal.
EXPECTATIONS OF CANDIDATE PERFORMANCE
Pelvic examination per vaginum should not be done and should not be specified by candidate.
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Investigations required
• Ultrasound examination (abdominal-pelvic ultrasound, not vaginal): to check the development of the uterus and
vagina and to confirm that these are normal
• Hormone tests: should order follicular stimulating hormone (FSH), luteinising hormone (LH), prolactin, and
oestradiol levels.
• Chromosome analysis is not necessary if uterus is shown to be normal and above hormonal levels are normal.
Advice to patient (the candidate should convey the substance of what follows to the patient):
• Reassurance that this is likely to be just a physiological delay in the first period as all else appears normal on
examination. The investigations which have been arranged should confirm this. The first period usually occurs
two years after the first breast development, but can be delayed for three years or longer as normal variation in
menarche.
• She will be reviewed after investigations have been established as normal and again in 12 months time. If a
period has still not occurred, estimation of oestradiol levels should be repeated.
• Ability to define the most likely cause of primary amenorrhoea (delayed menarche).
• Ability to arrange the appropriate investigations.
CRITICAL ERRORS
• Inadequate history to evaluate current pubertal status.
• Performance of pelvic vaginal examination as she is virginal. Requesting that pelvic examination should be done
would be a significant and potentially failing error.
• Failure to order abdominal ultrasound. Pelvic (vaginal) ultrasound is also inappropriate
• Failure to order hormonal analyses of FSH, prolactin and oestradiol.
This case illustrates the situation where a slightly delayed menarche can be a normal situation particularly where
there is a familial trait. It is therefore essential to obtain an appropriate history, both in regard to her own history and
that of other family members. Noninvasive investigations will enable this patient to be reassured in the presence of
other pubertal changes.
Common problems likely with candidate performance are:
• Failure to recognise that an apparently normal puberty is occurring. Therefore the cause of the primary
amenorrhoea is likely to be just a slight delay in the first period with everything else being normal. Other less
likely possible causes are obstruction to the outflow of blood from the uterus to the exterior by an intact hymen or
vaginal septum or an absence of development of the uterus. Ultrasound examination is essential to make these
latter diagnoses.
• Failure to reassure the patient and failure to advise review in 12 months time if a period has still not occurred.
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Condition 039
A skin lesion on the cheek of a 50-year-old man
AIMS OF STATION
To assess the candidate's ability to diagnose a facial skin lesion suspicious of basal cell carcinoma
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a builder aged 50 years. Most of your working life has been spent outdoors.
•
You have had a firm nodule on your cheek for a year or so, which has slowly increased in size. It has
recently developed an ulcer in the centre of it, and has bled a little. You think this may have followed you
picking at it. You are otherwise healthy and well with no serious past illnesses.
•
You have no allergies and are on no medications. Otherwise answer as for yourself.
Opening statement:
'I've had this thing on my cheek for about a year doctor. '
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should recognise from the history and physical findings that this is a 'suspicious' lesion which
requires excision, and should advise the patient accordingly.
KEY ISSUES
•
Ability to present a focused case summary.
•
Ability to identify and manage a 'suspicious' skin lesion, in this case basal cell carcinoma.
CRITICAL ERROR
•
Failure to diagnose that this is a 'suspicious' skin lesion needing excision.
COMMENTARY
This scenario has been arranged in the format of a summary case presentation to the examiner of a suspicious
skin lesion, followed by advice to the patient about treatment. It tests accuracy of observation and ability to
summarise the problem concisely. The diagnosis should be straightforward. The most likely diagnosis is an
ulcerating basal cell cancer and the most appropriate treatment is local excision with an adequate margin.
Differentiating a basal cell cancer from a squamous lesion or other skin malignancies is less important than
identifying the lesion as requiring appropriate histologic diagnosis after adequate excision.
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• Common clinical features of basal cell carcinoma (BCC) are:
~ BCC is the most common skin cancer comprising 80% of skin cancers, occurring usually in people older than
35 years, more frequently in males and in fair-skinned people,
~ BCC occurs most commonly on sun-exposed areas: face (mainly), neck, upper trunk, limbs (10%); but can
occur on covered areas as well. ~ Ulceration produces the characteristic 'rodent' ulcer as illustrated by this
example
~ BCCs grow slowly over years, and can occur in various forms: nodular, ulcerated, morphoeic, cystic or
pigmented, - They do not metastasise, but local spread can cause problems with surrounding
structures as they can spread deeply around nose, eye, or ear ('nothing burrows like
a basal cell').
• Patients need to be educated about avoiding direct sunlight when the sun is at its strongest: wear a broad
rimmed hat; wear a shirt; and use sun block cream when exposed.
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Condition 040
A pigmented mole on the trunk of a 30-year-old woman
AIMS OF STATION
To assess the candidate's ability to diagnose a pigmented focal skin lesion and to identify a 'suspicious' lesion.
EXAMINER INSTRUCTIONS
This patient has a 'suspicious' pigmented skin lesion: a melanocytic naevus suggestive of a dysplastic naevus.
Excluding melanoma by excision is critical to successful case management.
The examiner will have instructed the patient as follows:
•
You are a 30-year-old schoolteacher.
•
You have had a dark spot on your back for many years. You think you were born with it. The spot has
become darker over the last few months so you thought you would have it checked out. You have a few
other dark spots, but they have not changed.
•
You are otherwise healthy and well, and have had no serious past illnesses. You have no allergies, and are
on no medications.
Opening statement:
'It seems to have changed and become more itchy lately, doctor. '
EXPECTATIONS OF CANDIDATE PERFORMANCE
The presence of change in appearance and irritative symptoms in a previously stable pigmented naevus,
should raise concerns about malignant change, especially in a large lesion with appearances suggesting a
dysplastic naevus. The candidate should refer the patient for excisional biopsy.
KEY ISSUES
•
Ability to identify a 'suspicious' pigmented lesion, possibly at risk of malignant melanoma.
•
Ability to manage pigmented skin lesions appropriately.
CRITICAL ERROR
•
Failure to suspect malignant potential.
COMMENTARY
Most pigmented skin lesions are benign. About one third of melanomas arise in pre-existing naevi. Removal of
such naevi is important for melanoma prevention. The incidence of melanoma is rising in Australia and around
the world. Incidence is higher in fair-skinned people; appears to be related to brief intense sunlight exposure as
well as effect of chronic exposure.
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Most people have an average of 5-10 benign melanocytic naevi. Multiple dysplastic naevi carry a greater risk of
malignant change.
Clinical features of 'suspicious' dysplastic melanocytic naevi include:
• Large (> 5 mm) irregular moles, such as this patient exhibits, appearing usually on the trunks of young adults.
• Lesions with irregular, ill-defined borders, irregular pigmentation, background redness, variable colours — brown,
black, tan, pink.
• Most are stable and do not lead to melanoma, but excision is indicated if any diagnostic concerns.
Dysplastic naevus syndrome is diagnosed because of the presence of multiple, large, irregular pigmented naevi,
mainly on the trunk. It is important to exclude malignant melanoma
Signs indicative of possible malignant melanoma include:
• any change in size of a presenting lesion (lateral spread or thickening);
• change in shape;
• change in colour (brown, blue, black, red, white and combinations of these colours);
• change in surface;
• change in the border;
• bleeding or ulceration; and
• other symptoms (itching).
Development of satellite nodules and lymph node involvement are late signs.
Differential diagnosis of pigmented skin lesions includes:
• haemangioma (thrombosed);
• dermatofibroma (sclerosing haemangioma);
• pigmented seborrhoeic keratosis;
• pigmented basal cell carcinoma;
• junctional and compound benign melanocytic naevi;
• blue naevi;
• dysplastic naevi; and
• lentigines.
Management:
• In this case, the solitary dysplastic naevus may have no significant malignant potential at this stage. However,
because of the size of the lesion and the patient's concern, this lesion should be excised.
• Suspicious pigmented lesions should have complete excisional biopsy, and not be treated by cryotherapy.
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Performance Guidelines
Condition 041
An itchy rash on the hands of a 19-year-old woman
AIMS OF STATION
To assess the candidate's ability to diagnose, confirm and treat scabies, and to prevent
recurrence.
Examiner Instructions:
The examiner will have instructed the patient as follows: Opening
statement
'I want to get rid of this rash on my hands. '
•
Follow with 'It started about a week ago and I can t stop scratching my hands
because of the itch. '
•
In response to questions the doctor may ask:
~ You have not had anything like this before,
~ No rash or itchiness elsewhere on your body.
~ The itch is intense and made worse by warming your hands, as when washing up in
hot water or bathing or showering.
~ The itch is worst at night and interferes with sleep.
~ Your hands have not been in contact with any irritants, chemicals or plants.
~ Your general health is excellent.
~ No past history of any serious illness.
~ No known allergies.
~ No history of mental or behavioural disturbance.
~ No recent travel away from home.
~ No medication except oral contraception.
~ Your boyfriend with whom you are sexually active has had a similar rash though not as bad
and he has not sought medical advice about it.
Scratch and rub the backs of your knuckles and between the bases of your fingers. Answer the
doctor's questions in a straightforward manner including about the relationship with your
boyfriend. Do not reveal this spontaneously.
EXPECTATIONS OF CANDIDATE PERFORMANCE
•
•
•
Approach to patient. Display interest and intention to deal effectively with the condition. Be
nonjudgmental about possible sexual transmission of scabies from boyfriend. Provide
reassurance that condition is simply cured and not serious. Compliance with the whole of the
treatment regimen should be obtained.
History. Identify site and severity of itch and question about sexual activity after other possible
sources have been excluded.
Confirmation of diagnosis. The candidate may diagnose scabies from illustration and history
as given above, but should advise the patient that diagnosis must be confirmed by taking skin
scrapings from the lesions for microscopy.
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Examiner should intervene at this point by stating 'Please assume that the skin scrapings are
positive for scabies, and advise the patient accordingly. ' The examiner should only state this if the
candidate has mentioned the need for skin scrapings to diagnose scabies.
•
Patient education and counselling. In this case, the condition is transmitted by close contact during sexual
activity. Description of the scabies mite is expected with reassurance that the condition is not serious,
although very uncomfortable, and is readily treatable. Patient should advise boyfriend to seek medical
advice.
•
Management.
~ Application of permethrin cream or lotion 5% (Lyclear®) or benzyl benzoate emulsion 25% (Ascabiol®) to
entire body from jawline down including nails, flexures and genitals. Leave permethrin cream or lotion
overnight then wash off thoroughly, but benzyl benzoate lotion should be left on for 24 hours.
~ Avoid hot baths or scrubbing before application
~ Treat household contacts even if nonsymptomatic
~ Wash clothing and bed clothes in hot water and expose to sun to dry
~ Repeat treatment in one week if infestation is considered to be severe
~ Avoid intimate contact with boyfriend until he has also been properly treated
Key Issues
• Approach to patient — Ability to establish satisfactory relationship with patient to achieve compliance and
cooperation of patient to get boyfriend to seek treatment.
• History — Ability to take an appropriate history including site and severity of pruritus and sexual partner as
source of infection.
• Diagnosis — Should advise microscopy of skin scrapings to facilitate diagnosis.
• Management — Provide adequate advice for proper treatment and advise the patient to avoid intimate
contact with boyfriend until he has been treated
Critical Error
• Failure to suspect scabies or to take action to confirm diagnosis.
Commentary
Scabies is a highly contagious infestation which is spread through close contact including sexual contact.
Scabies can affect entire households, especially if overcrowded, although this is now uncommon. It is
characterised by widespread inflammatory papules and severe pruritus and it can be endemic among school
children and institutionalised older patients.
The female scabies mite (illustrated below) burrows just beneath the skin in order to lay her eggs and then dies.
The eggs hatch into mites which spread out across the skin and live for about 30 days. A mite antigen in the
excreta induces a hypersensitivity rash.
187
CONDITION 041. FIGURE 2.
Scabies mite (Sarcoptes scabiei)
CONDITION 041. FIGURE 3.
Penile scabies
Clinical features include intense itching, worse at night and when hands and body are warm (for
example, after a shower), with an erythematous papular rash usually on hands and wrists. The
rash also can occur in web spaces, on male genitalia as illustrated, on elbows, axillae, feet and
ankles, or nipples of females. Diagnosis is confirmed by microscopy of skin scrapings.
188
Condition 042
Red painful dry hands in a 30-year-old bricklayer
AIMS OF STATION
To assess the candidate's ability to diagnose occupational dermatitis and advise an initial management plan.
This patient has occupational contact dermatitis secondary to concrete exposure.
After 6 minutes, if the candidate has not identified the condition as contact dermatitis ask
the questions:
•
What is the likely cause of the condition?'
•
'How would you manage this condition?'
The examiner will have instructed the patient as follows:
You are aged 30 years, and have been working as a bricklayer/contractor for about a year.
Opening statement
'I've got problems with this rash on my hands. '
Following without prompting:
Your hands have been itchy and dry for some months now, and are getting worse. The rash is on no other part
of the body. You are otherwise healthy and well, with no serious past illnesses. You have no allergies. You are
on no medications.
State if questioned about the relationship of rash to work: the rash definitely improved significantly after a
holiday from work.
Your brother has skin problems but you are not sure what type.
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Performance Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
•
History — must elicit occupational history.
•
Diagnosis — should suspect allergic contact dermatitis and its cause in this patient from the
history and from the physical findings as illustrated, which involve palmar and dorsal surfaces
of both hands. Confirmation of diagnosis is by patch testing by dermatologist (not essential).
•
Management — explain to the patient that the rash will persist as long as there is exposure to
cement although its severity may be reduced by the following initial management:
~ Wash only with water and avoid soap.
~ Pat dry after washing
~ Apply topical corticosteroid cream to gain initial control. Oral prednisolone is reserved for
severe cases.
~ Oral antibiotics may be required for secondary infection in severe cases
~ Consider using emollient agents for future prevention.
~ For cement dermatitis, specific measures involve avoiding contact with wet cement: using
barrier creams before putting on gloves (do not use barrier creams on damaged skin);
using protective gloves when working and washing hands after being exposed to cement.
KEY ISSUES
•
Ability to identify the type and cause of the dermatitis.
•
Ability to manage occupational contact dermatitis.
•
Consideration of cement as most likely cause of dermatitis.
CRITICAL ERROR
•
Failure to suspect causal work association in diagnosis.
COMMENTARY
Allergic contact dermatitis is due to a delayed hypersensitivity reaction. While physical
appearance of the skin can be similar to other forms of dermatitis, rash site and exposure history
are critical for diagnosis, management and prevention.
Trigger factors only affect some people. Common trigger factors include cosmetic ingredients
including perfumes and preservatives, topical antibiotics, topical anaesthetics, topical
antihistamines, plants (rhus. grevillea, primula, poison ivy), metal salts (nickel sulphate,
chromâtes — as occur in cement and concrete), dyes, rubber/latex, epoxy resins, glues,
acrylates, coral.
In cement dermatitis, individuals can become sensitised to chromate salts at any time, even after
working with cement for many years.
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Performance Guidelines
Condition 043
Swelling of both ankles in a 53-year-old woman
AIMS OF STATION
To assess the candidate's ability to take a detailed history concerning swelling of the ankles,
knowledge of possible causes and the components of the physical examination necessary to
reach a firm provisional diagnosis.
The examiner will have instructed the patient as follows:
You are a 53-year-old clerical worker and are consulting the doctor about swelling of your
ankles. The doctor will take a history about this complaint but will not examine you
Opening statement
'I have come to see you about swelling of my ankles. '
Provide the following without prompting
'Over the past eight weeks my ankles have been swelling. I usually notice this is worse at the
end of each day. They have mostly gone down by the mornings. My ankles have never swelled
up before'.
Provide the following in answer to appropriate questioning
• The swelling is the same in both lower legs, there is no discolouration of the skin.
• There has been no pain in your legs.
• If asked about shortness of breath: you believe that you are not as fit as you used to be
because you become noticeably breathless when walking up stairs or hurrying. This passes
when you rest.
• Regarding exercise: you gave up playing tennis about a year ago because you became very
breathless for a short time after a rally and also you felt exhausted afterwards.
• Recurring palpitations: for some years you have noticed that your heart seems to 'bounce
around in your chest' particularly when you are going off to sleep (thumps and misses beats).
Your heart also seems to race after any strenuous exertion although this settles down after a
few minutes. You have not counted your pulse rate but you are sure that it is faster than
normal. You have the feeling that it may not be regular at times, but you find it hard to be sure.
• No associated dizziness or blackouts.
• No suggestion of a fever, no chills or shakes.
• No cough or blood in sputum.
• You have not had any recent chest pain with or without exercise, you may comment that this
is why you haven't worried about the other symptoms. If asked about chest pain in the past
say ' Four years ago I had a bad pain in the centre of my chest. I was on holidays at the time.
The pain lasted about two hours and I felt unwell for a few days afterwards. '
• You sleep well, lying flat in bed: you do not snore.
191
Review of general health
•
You consider yourself to be in good health. You have never suffered any serious ill health.
•
You have not had a medical check-up recently. 'After all. my father was 90 when he died'.
•
If asked other specific questions, reply in the negative. You have never had any kidney
problems (for example, blood in urine) or liver disease (jaundice).
Review of relevant systems
•
Positive responses are confined to the cardiovascular system.
•
In particular, no gastrointestinal symptoms including no rectal bleeding.
Other significant information
•
You are very busy at work.
•
You work for a large legal firm as a legal secretary.
•
The only exercise you have these days is when gardening and this does not cause any
problems, unless you are digging for more than a short time, then you get 'puffed'
•
You have noticed this over the past six months.
Patient profile
•
You are married.
•
Your spouse is well.
•
You have three married children.
•
You smoked 20 cigarettes a day from age of 18 years and stopped a year ago.
•
You drink three glasses of wine daily.
•
You are not taking any medication.
•
You eat a normal, well-balanced diet.
Family history
•
Mother died aged 77 years (stroke).
•
Father died aged 90 years.
•
No brothers or sisters.
Past medical history
•
No serious illnesses.
•
No operations.
•
No history suggestive of rheumatic fever.
•
Blood pressure has been checked several times in recent years and was always normal.
Other instructions
•
Appear calm and not unduly concerned about your swollen ankles.
•
You have attributed them to your age.
•
Be cooperative, but do not disclose all of the cardiovascular symptoms without facilitation,
prompting and appropriate questioning by the doctor, as indicated above.
•
You are not worried about heart trouble because you no longer smoke and, apart from the
short episode 4 years ago, do not have chest pain.
•
You have never suspected that your various symptoms could be connected and would not
have attended without the insistence of your spouse.
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Performance Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
History
• This should include a reasonable number of questions detailed in the patient's advice above.
Some questions out of each section should be included, but clearly time limitations will
influence the choice and number
• The history must at least cover key questions relating to possible cardiac, hepatic and renal
causes for the oedema.
• Venous thrombosis, causing inferior venacaval obstruction or bilateral lower limb deep
venous thrombosis is unlikely but needs to be considered.
• Possible diagnosis given to patient after history must include cardiac failure as the most likely
condition.
• Other potential causes could also include hepatic and renal disease (consider cirrhosis,
nephrotic syndrome or malignancy as most unlikely causes in this patient).
• If, after five minutes the candidate has not started to discuss with the examiner some of the
likely causes for the symptoms, encourage the candidate to do so
• After five minutes, if the candidate has not already done so, instruct the candidate to tel the
patient the working diagnosis, and then ask the examiner for physical findings to confirm this.
Examination
• The examiner is not required to provide specific examination findings but should
encourage the candidate to relate the examination findings sought to the previously stated
diagnostic possibilities.
• These should include:
~ temperature;
~ pulse rate and rhythm;
~ blood pressure;
~ jugular venous pulse and pressure;
~ mucous membranes;
~ cardiac examination (apex beat and auscultation);
~ respiratory examination (any reference to effusion, adventitious sounds or rub
acceptable);
~ liver, spleen
~ inguinal region and lower limbs (symmetry of oedema, discolouration, tenderness, heat);
and
~ urinalysis must be requested or come up some time in the assessment.
• Candidates are not expected to indicate the investigations required in this station, although
candidates may indicate the tests required to confirm the proposed diagnosis.
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043
Performance Guidelines
KEY ISSUES
•
Ability to take an appropriate history.
•
Ability to explain to the patient why she has swollen ankles and shortness of breath.
•
Ability to provide a sensible differential diagnosis.
•
Ability to state precisely what would be sought on physical examination and why.
This station assesses the candidate's ability to take a comprehensive, but ordered and concise
history in a patient with recent onset of bilateral leg oedema. It also examines clinical reasoning
abilities in understanding the potential causes of leg oedema and proceeding in a logical way to
accumulate the relevant positive and negative features of the history in order to form a
satisfactory probability diagnosis.
Congestive heart failure can present in a subtle way with symptoms of right heart failure, such as
bilateral leg oedema, which is worse after prolonged standing and reduces with supine rest. As
in this case, there is often a coexisting history of left heart failure symptoms, such as exertional
dyspnoea. It is very important in a patient with possible congestive heart failure not to be
satisfied with this as a complete diagnosis, but to ask the questions 'Why has this patient
developed heart failure? What is the underlying cause? This will require an understanding of the
pathophysiology of heart failure.
Heart failure is difficult to define. Various definitions include the following:
•
A pathophysiological state in which an abnormality of cardiac function is responsible for the
failure of the heart to pump blood at a rate commensurate with the requirements of the
metabolising tissues.'
•
A clinical syndrome caused by an abnormality of the heart and recognised by a characteristic
pattern of haemodynamic, renal, neural and hormonal responses.'
•
A biomechanical definition is that the failing heart exhibits a reduction of power such that it
cannot maintain a normal cardiac output without abnormal elevation of systemic and/or
pulmonary venous pressures.
The underlying causes of heart failure are many and it is useful to consider these under the
following group headings:
•
Primary myocardial disease (ischaemic heart disease, cardiomyopathy).
•
•
Pressure overload (hypertension, aortic stenosis).
Volume overload (aortic regurgitation, mitral regurgitation, ventricular septal defect, high
output states).
•
Obstruction to ventricular filling (mitral stenosis).
•
Restriction of ventricular filling (hypertrophic cardiomyopathy, constrictive pericarditis).
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Performance Guidelines
In this station the patient presents with important history features of probable ischaemic heart
disease and cardiac arrhythmia. The onset of atrial fibrillation is often a precipitant of heart
failure, and this is particularly true in patients who are older, have hypertension and/or
diabetes, or underlying mitral valve disease. In patients who have stiff (noncompliant) hearts due to age, left ventricular hypertrophy, hypertension, diabetes, ischaemic heart disease or a
combination of these — the first presentation may be due to cardiac diastolic dysfunction
where heart failure is caused by an increased resistance to filling of one or both ventricles.
Atrial fibrillation is often a cause of diastolic heart failure because of the effects on ventricular
filling with loss of the atrial systole and an increased ventricular rate. With diastolic dysfunction
of the left ventricle, the presentation is usually with breathlessness on exertion and episodes of
acute pulmonary oedema. In this patient, the presentation with leg oedema is an indication of
right heart failure, which in the great majority of patients is secondary to a longstanding
problem with the left heart, the so-called 'backward failure'.
CONDITION 043. FIGURE 2. Pitting
oedema in CCF
195
2-B: Physical Examination
Vernon C Marshall and Barry P McGrath
'One of the unexpected and disturbing results of the development of increasingly precise and useful diagnostic
measures in the laboratory and X-ray departments is a significant and often alarming decrease in emphasis on the
training of the medical student to perform with excellence the average comprehensive physical examination.'
Journal of the American Medical Association (1962)
LOOK! MOVE! FEEL! LISTEN! MEASURE! COMPARE! INTERPRET!
This aide-memoire comprises the seven champions of physical examination. Used in the correct sequence (and
remember the above sequence, eyes first and foremost and only then fingers, hands and ears), they form the basis of all
physical examination techniques. Whether one is examining the whole patient, a focal region (head and neck, back, chest,
abdomen, limbs) or a body system (integument, cardiovascular, respiratory, gastrointestinal, neuroendocrine), an ordered,
well practised and logical sequence is essential. Sound technique facilitates accurate findings and diagnostic acumen.
Physical examination still matters and, along with a careful history, will confirm the diagnosis in the majority of
consultations despite the plethora and utility of available investigations. In preparing themselves to be good noticers and
good examiners of physical signs, clinicians should gain practice in:
•
Pattern recognition: the ability to define and group a constellation of features in order to diagnose, for example,
shock, hyperthyroidism or cardiac failure.
•
Focused examination of an area or region such as a limb, the neck, the chest or the abdomen. Here one must
concentrate on checking features — normal and abnormal-of the multiple local structures which comprise focal
components of several body systems grouped at a common site. A sound knowledge of clinical anatomy is an
essential prerequisite.
•
Examination of multiple sites and areas logically, sequentially and expeditiously to provide global assessment of a
body system (cardiovascular, gastrointestinal, etc) A sound knowledge of clinical physiopathology is an essential
prerequisite.
This introductory segment and the MCATs following provide selected examples of these techniques.
Skill development in physical examination is sequential throughout undergraduate medical education and extends into
independent and specialist practice. Like the acquisition of any skill, medical practitioners in their attempts to become
skilled clinicians must:
•
have a good understanding of correct methodology;
•
assiduously develop the correct techniques;
•
have the right equipment and know how to use it;
•
know the range of normality and what constitutes abnormality;
•
be aware of the limitations of clinical signs, but use adjuvant investigations thoughtfully and selectively; and
•
practise, and practise frequently.
196
2-B
Physical Examination
Central to correct physical examination, and unique to the health domain, is the manner in which
the examiner interacts with the patient. Common problems that are observed in candidates
undertaking physical examination include the following:
• lack of empathy and skill in engaging the patient;
Physical examination still matters, and along with a
• failure to spend time in general inspection of the patient, thus missing careful history, will confirm the diagnosis in the
important aspects of pattern recognition;
majority of consultations, despite the plethora and
• causing undue discomfort to the patient;
utility of available investingations.
• incorrect techniques;
• failure to develop a careful, systematic approach;
• a slipshod approach, missing important signs along the way;
• inaccuracy of sign characterisation and of measurements;
• missing obvious pathology by overlooking physical signs;
• finding things that are not there;
• over-interpretation; and
• inability to provide a succinct, accurate clinical summary.
PHYSICAL EXAMINATION — REGIONAL EXAMINATION
• The integument
The skin is the largest body organ. Skin rashes should be assessed as macular, papular,
maculopapular, vesicular or pustular, itchy or nonitchy. Rashes are commonly allergic, irritative
or infective. Atopic eczema is a blotchy ill-defined red macular rash which can progress to papule
and pustule formation. Irritative contact dermatitis can be wet (intertrigo, nappy rash), or dry and
associated with hyperkeratosis, lichenification and pigmentation. Infective rashes are legion and
range through bacterial (impetigo, acne), fungal, or viral (molluscum contagiosum, herpes
simplex and zoster, HIV). Involvement of scalp or nails may occur (psoriasis). The distribution of
the rash (e.g. pretibial erythema nodosum) and associated features (e.g. focal skin ischaemia in
vasculitis; central clearing in fungal lesions), give important diagnostic clues.
SECTION 2-B. FIGURE
1. Flexural eczema
SECTION 2-B. FIGURE 2.
Acne vulgaris
197
2-B
Physical Examination
SECTION 2-B. FIGURE 3.
Molluscum contagiosum
SECTION 2-B. FIGURE 4.
Microsporum canis
('ring worm')
Focal skin lesions are also of immense variety. In Australia, malignant skin lesions are common,
particularly in higher latitudes and in fair-haired and pale-skinned individuals. Basal cell cancers
are the most common cancers, and although mostly seen on the face and other exposed parts,
can occur anywhere. By contrast squamous cancers are almost always confined to sun
exposed areas. Melanomas are the most serious lesions; their incidence is increasing in
Australia and in most parts of the world, so picking up dysplastic or premalignant lesions is
important.
Most focal skin lesions are, however, benign and include benign melanocytic and other naevi,
calluses and viral warts. Solar keratoses, seborrhoeic keratoses, dermatofibromas (sclerosing
hemangiomas), 'senile' melanocytic and purpuric freckling, and cherry angiomas (Campbell de
Morgan spots), are seen with increasing frequency with increasing age.
SECTION 2-B. FIGURES 5 AND 6.
Neurofibromatosis Type I — von Recklinghausen disease of nerves Note
numerous cutaneous neurofibromas (molluscum fibrosum)
198
2-B
Physical Examination
SECTION 2-B. FIGURES 7 AND 8.
SECTION 2-B. FIGURE 9.
Portwine stains — cavernous haemangiomas Nodular portwine stain
Cutaneous neurofibromas form part of the syndrome of von Recklinghausen disease of
nerves (neurofibromatosis). The syndrome is usually readily identified by pattern recognition.
Solitary cutaneous neurofibromas are also often found apart from the inherited syndrome.
Congenital 'portwine' stains (cavernous haemangiomas) have a classical appearance and
may become nodular with age.
It is usually possible following a focused and accurate history and examination to classify
lesions into clearly benign', 'clearly malignant', and 'suspicious' with the latter two needing
appropriately wide excisional biopsy.
• Subcutaneous lumps
These are mostly benign and often merely need accurate diagnosis and reassurance. The
diagnostic features of most importance are site, physical characteristics, and relationships of
the lump to its surroundings (which includes the regional nodes).
Critical features to note are the Ss, Cs, Ts, Fs, and Ps.
• Site, Size, Shape, Surroundings.
• Contour, Consistency, Colour, Compressibility, Cough impulse.
• Tenderness, Temperature, Transillumination.
• Fluctuation, Fixity, Fields.
• Pulsation, Percussion.
The lump should always be layered' — is it in subcutaneous fat, and if so is it attached to
overlying skin, or underlying fascia and musculature?
199
The mobility of subcutaneous lumps in relation to their superficial and deep surroundings is
important in picking up infiltrative rather than expansile enlargement. The former is very
suggestive of malignant or inflammatory fixation and fibrosis. The lump's 'mobility' or fixity helps in
checking whether it is below deep fascia, attached to nearby bone or vessel or nerve, in the
abdominal parietes or intra-abdominal. Most lipomas, 'sebaceous' and other cysts, ganglia,
bursae, lymph node swellings, hernias, vascular swellings and other subcutaneous lumps will be
readily diagnosable if the above simple rules of focused assessment are combined with basic
knowledge of local anatomy and likely pathologies.
•
Head and neck lumps
With neck lumps it is particularly important always first to observe the effects of movement:
swallowing, coughing, protruding the tongue, and tensing underlying muscles such as
sternomastoid or trapezius. Remember to examine the accessible nasopharynx and oropharynx.
The laryngopharynx and oesophagus are not accessible to your examining hands and fingers,
but remember the importance of endoscopic evaluation in the diagnosis of occult primary
neoplasms presenting as neck lumps. With neck lymph node swellings always keep in mind the
possibility of:
•
lymphatic spread from areas outside head and neck (chest and lungs, the abdomen or
genitals); and
•
focal presentation of systemic lymphoid pathology.
SECTION 2-B. FIGURE 10.
Hodgkin lymphoma
SECTION 2-B. FIGURE 11.
Nodal metastasis from papillary
carcinoma thyroid
Examination of a cytologic aspirate will often clarify the diagnosis and point the way for further
diagnostic tests. For example, squamous neoplastic cells in a neck lymph node point to a
potential primary neoplasm of skin, laryngopharynx, oesophagus, or lung, rather than from
thyroid or stomach. Cytology may be specific for melanoma. If suggestive of adenocarcinoma,
cytology commonly points to a lung, stomach, colon, breast, or testicular origin of the primary.
Cytology is particularly useful in diagnosis and classification of lymphomas.
Careful application of the above techniques facilitates identification of the common head and
neck lumps and their primary pathologies. The most common swellings will involve lymph nodes,
thyroid, salivary glands, or developmental lesions (branchial cysts, cystic hygromas,
sternomastoid 'tumour'). Rarer lesions include chemodectomas such as carotid body tumours
and neurilemmomas.
200
2-B
Physical Examination
• Examination of the hands and wrists
This assessment will include structural and functional changes across multiple systems. A logical approach is to think
successively of the various tissue layers, checking for structure and function of each. Inspect carefully for deformities,
and any abnormalities of skin and nails, then probe deeper. Test active and passive movements of each joint, always
checking active movements first. Palpate carefully and carry out clinical testing for vascular insufficiency,
musculotendinous disorders, bone and joint problems, and neurologic abnormalities.
Common conditions encountered include:
• Skin and nails: circulatory, neurotropic and occupational changes; a large variety of dermatoses and nail changes;
pitting; infective lesions (Osier nodes, etc.); and vasculitis (nailfold capillaries).
SECTION 2-B. FIGURES 12 AND 13. Osier nodes in
bacterial endocarditis
• Subcutaneous fasciae: Dupuytren nodularity and contracture, carpal tunnel syndrome.
• Muscles, tendons and sheaths: Volkmann contracture (long forearm muscles) and short hand muscle
contractures (intrinsic-plus deformity); trigger finger (stenosing tenosynovitis), De Quervain tenosynovitis;
spontaneous tendon rupture (dropped finger, thumb); and ganglia (dorsal, ventral, digital).
• Bones and joints: changes of osteoarthritis (Heberden and Boucher nodes, carpometacarpal joint of thumb);
rheumatoid arthritis (synovial thickening, rheumatoid nodules, metacarpophalangeal subluxations and ulnar
deviation fingers. Z-thumb, swan-neck. boutonnière, mallet finger deformities); and gout.
SECTION 2-B. FIGURES 14 AND 15.
Hands in rheumatoid arthritis
Rheumatoid nodules
201
2-B
Physical
Examination
Nerves: check median, ulnar and radial nerve motor, sensory and autonomic function;! differentiate
peripheral nerve lesions from more centrally located cervical nerve root, and| upper or lower brachial plexus
lesions.
SECTION 2-B. FIGURES 16 AND 17.
Testing interossei function
•
Thenar atrophy
Vessels: observe for vascular ischaemic digital lesions, palpate pulses, check dominant! arterial supply
(Allen test), check for proximal lesions (cervical rib, listen for axillary bruit)!
•
With hand and wrist trauma, check for bone and joint injuries, and local and distal tendonj nerve and
vascular effects.
•
Functional assessment: test grip strength in dominant and nondominant hand: testl power, precision, and
hook grips and opposition of fingers and thumb. Finally ask patient to perform everyday tasks of using a
key, undoing buttons, writing, and combing hair.
•
Remember that any regional examination (for example, of head and neck, abdomen,; chest, limbs)
necessarily involves assessment of several systems. A systems-based examination, by contrast,
involves examination of several regions. Note the differing focused techniques required in performing an
abdominal examination from examination of the gastrointestinal system
PHYSICAL EXAMINATION SKILLS: EXAMINATION OF THE MAIN BODY SYSTEMS
The structured approaches which follow provide succinct information on how to perform aq examination of
each of the main body systems. The aim is to provide guidance for a thorough examination of each system
such that important signs are not overlooked Readers are provided with learning objectives for each system
and a brief guide on how to prepare both themselves and the patient in order to conduct the system specific
examination. This material is based on the Clinical Skills curriculum for Monash University Faculty of
Medicine, Nursing and Health Sciences.
Generic learning objectives
•
Conduct physical examinations across the following:
~ Integument (see previous description)
~ Neurological system and mental status
~ Cardiovascular system
~ Respiratory system
~ Gastrointestinal system
202
2-B
Physical Examination
~ Haematological system
~ Endocrinological system
~ Rheumatoiogical system
~ Renal and urogenital system
• Interpret and integrate history and physical examination findings to arrive at an appropriate
diagnosis or differential diagnosis in commonly presenting complaints and conditions.
• Describe and use clinical reasoning skills.
Preparing the patient
• Establish patient's level of communication capacity.
• Introductions:
~ Set the scene.
~ Explain your status.
~ Exhibit a human interest in the patient.
~ Gain patient permission.
• Demonstrate professionalism.
• Show sensitivity to patient's modesty, health status and comfort.
• Involve patient in the process with clear initial explanation and stepwise instructions regarding
what you are doing and why and what you wish the patient to do.
• Establish what difficulties and discomfort (especially pain) the patient may have before and
during the conduct of the physical examination, and avoid causing pain wherever possible.
What equipment is needed?
Have your own basic set of items to aid in eliciting signs. Items marked with an asterisk are
standard requirements for personal use
• watch with stop watch or second hand.*
• stethoscope with capacity to detect low frequency (bell) and high frequency (diaphragm)
sounds.*
• pencil torch.*
• disposable tongue depressors.*
• measuring tape.*
• reflex hammer (Queen Square pattern, best with a large-size rubber head).*
• pins — these must be single use only and must not be hypodermic needles or diabetic lancets.
Neurotips are excellent.*
• cotton wool.*
• 128 or 256 Hz tuning fork for vibration testing.*
• Snellen chart for testing visual acuity.
• mini-mental state examination (MMSE) card.
• sphygmomanometers will be available in all wards and clinics and other items will also be
available for relevant stations, but items starred you should have for personal use.
203
2-B
Physical Examination
1. THE NEUROLOGICAL SYSTEM
1.1 Objectives
Objectives for a neurological examination
•
Perform a stage-appropriate, technically competent neurological examination, incling
~ mental status
~ speech - gait
~ cranial nerves
~ limbs
•
Localise neurological disorders based on the results of physical examination.
Other objectives
Demonstrate stage-appropriate knowledge of the selection and use of standard neurological investigations
(magnetic resonance imaging [MRI], computed tomography [CT], single proton emission computed
tomography [SPECT], positron emission tomography [PET], electroencephalography [EEG], nerve
conduction studies [NCS], electromyography j [EMG], lumbar puncture [LP]) based on the results of history
and physical examination,
1.2 Preparation
What specific equipment is needed?
Essential
•
A red-topped pin for visual field examination
•
A bright pocket torch (a focusing torch with a halogen bulb, [e.g. mini-Maglite® or : similar] is best)
•
Visual acuity chart (Snellen) — the half-size 3 metre chart is the most practical for ward work
Desirable
•
Ophthalmoscope
•
512 or 1,024 Hz tuning fork for hearing tests
•
Glasgow Coma Score card as an aide mémoire
Usually readily obtainable
•
Cotton wool (for corneal reflex testing)
•
Large size paper clip (straighten, bend in centre, then bend tips at right angles to ft a serviceable 2-point
discriminator)
1.3 Physical examination
1.3.1 The neurological examination
•
Assessment of mental status
~ level of consciousness
~ attention (e.g. digit span)
~ language (comprehension, repetition, spontaneous speech, naming)
~ memory
~ visuoconstructional ability
~ executional ability
~ MMSE (for scaling)
204
Physical
2-B
Examination
● Assessment of speech
~ dysphasia/dysarthria/dysphonia
● Observation of gait and posture
~ free gait and turning
~ tandem (heel to toe) gait
~ Romberg test
~ toe/heel stance and walk, rising from squat or chair.
Trendelenburg test
● Cranial nerve examination involves
~ olfaction (not routinely tested, anosmia usually due
to olfactory nerve or bulb injury)
~ vision: acuity, visual fields (red pin), colour vision,
fundoscopy
~ pupils: shape, size, symmetry, reactivity (light and
accommodation)
SECTION 2-B. FIGURE 18.
Trendelenburg test
~ eye movements: smooth pursuit (H-shape), diplopia,
nystagmus
~ trigeminal: corneal reflex, cutaneous sensation, motor function, jaw jerk
~ facial: facial movements, strength of eye/mouth closure, corneal reflex
~ hearing and balance: whispered voice, otoscopy, tuning fork tests; vertigo; nystagmus
~ palatal: sensation, gag reflex/palatal movement, cough
~ accessory: sternocleidomastoids, trapezius
~ hypoglossal: tongue protrusion/fasciculation
SECTION 2-B. FIGURE 19.
Papilloedema
SECTION 2-B. FIGURES 20 AND 21.
Right hypoglossal nerve palsy
● Examination of the limbs
~ observe for deformity/wasting/fasciculation/adventitious movements
~ tone (spasticity, extrapyramidal)
~ power
~ reflexes (tendon/cutaneous)
~ coordination and rhythm
~ sensation
joint position/vibration
pin prick/temperature
2-point discrimination
205
2-B
Physical Examination
2. THE CARDIOVASCULAR SYSTEM
2.1 Objectives for a cardiovascular examination
•
Inspect for general and peripheral signs of cardiovascular disorder
•
Accurately record vital signs — pulse and blood pressure
•
Assess the jugular venous pulse
•
Perform comprehensive central examination of the heart
•
Detect and differentiate normal and abnormal impulses, heart sounds and murmurs
•
Examine the lung bases, abdomen and lower limbs for signs of heart failure
•
Examine the central (carotid and aorta) and peripheral arterial pulses and listen for bruits
•
Provide an accurate summary of your findings
2.2 Preparation
•
Specific to the cardiovascular examination
~ have adequate exposure of the patient's chest wall
~ comfortably position the patient in the supine, 45 degree and sitting positions,
2.3 Physical Examination
2.3.1 The cardiovascular examination
•
Observe general appearance - colour
~ respiration
~ peripheral swelling
•
Observe and feel the hands
~ colour
~ warmth
•
~ fingernails
Feel and listen: the arterial pulse — radial: character, rate, rhythm, symmetry, brachial, the vessel wall
•
Measure and interpret blood pressure
•
Observe the face, tongue, sclera and conjunctivae
•
The neck
~ JVP: height, character, waveform
~ carotid arteries, feel and listen
~ trachea: position
•
The precordium
~ inspect for scars, pulsations
~ feel apex beat, and over 4 valve sites (impulses, thrills)
~ listen for heart sounds, murmurs — 4 sites
~ special manoeuvres for mitral, aortic murmurs
•
The chest
~ percuss and auscultate lung bases
206
2-B
Physical Examination
• The abdomen
~ look, feel, and percuss liver edge (check for pulsation and movement with breathing)
~ look, feel, and percuss spleen
~ look, feel, and listen to aorta
~ examine femoral pulses (radial-femoral delay)
• The limbs
~ inspect skin
~ check for pitting oedema
~ check pulses and peripheral circulation
~ check venous system
3 THE RESPIRATORY SYSTEM
3.1 Objectives for a respiratory examination
• Inspect for signs of respiratory disorders, respiratory distress
• Accurately record vital signs
• Recognise clubbing
SECTION 2-B. FIGURES 22 AND 23.
Finger clubbing
• Recognise different breathing patterns
~ paradoxical, asymmetrical, recruitment of accessory muscles, diaphragmatic
dysfunction
• Examine the thorax
~ the chest wall and spine
~ the lung fields
~ central cardiac examination
• Assess JVP, the abdomen and lower limbs for evidence of right heart failure
• Assess for metastatic disease — lymph nodes in neck and axillae, liver, bony tenderness
• Provide an accurate summary and interpretation of findings
207
1
1
3.2 Useful specific equipment
• Peak flow meter
SECTION 2-B. FIGURES 24 AND 25.
Peak flow meter
3.3 Physical examination
3.3.1 The respiratory examination
•
Look for use of sputum cup, inhalers, oxygen
•
General inspection of patient
~ obesity/cachexia
~ inspired oxygen requirements
~ cyanosis
~ respiratory distress and ventilatory pattern
•
Inspect hands
~ nicotine staining
~ clubbing
~ peripheral cyanosis
~ metabolic flap
~ pulmonary osteoarthropathy
•
Blood pressure — measure, determine if there is paradox
•
Head and neck
~ JVP height, character and waveform ( c o r p u l m o n a l e )
~ mouth/tongue (central cyanosis)
~ trachea (tug, deviation)
~ lymph node groups
•
Cardiac examination
~ apex beat position
~ parasternal heave ( c o r p u l m o n a l e )
~ heart sounds
208
2-B
Physical Examination
• Thorax
~ chest inspection — scars, deformity, kyphosis, barrel chest, rib crowding (anterior
upper chest)
~ the lung fields (start posteriorly)
~ chest expansion — demonstrate symmetry/asymmetry, check for flail segment.
~ percussion — Compare sides for normality, dullness, hyper-resonance
~ auscultation — vocal resonance, normal and abnormal breath sounds (bronchial
breathing) and added breath sounds (wheezes or crackles)
~ anterior chest — repeat lung fields examination
~ test for upper lobe expansion, symmetry
~ percuss over clavicles
~ percuss and auscultate upper chest, axillae and laterally (remember right middle lobe
region)
~ percuss spine and spring ribs for bony tenderness
~ assess sacral oedema
• Abdomen
~ liver span — look for ptosis, feel for pulsatile liver
• Lower limbs
~ oedema, rashes
• Bedside lung function testing
~ forced expiratory time (obstructive disorders)
~ counting time (restrictive and/or obstructive disorders)
~ peak flow measurement (special test)
4 THE GASTROINTESTINAL SYSTEM
4.1 Objectives for a gastrointestinal examination
• Inspect for general and peripheral signs of gastrointestinal disease
• Accurately record vital signs (including lying and standing blood pressure)
• Recognise
~ anaemia and hypovolemia
~ jaundice, ascites and signs of chronic liver disease
~ abdominal veins (Caput Medusae)
~ hepatomegaly and splenomegaly
SECTION 2-B. FIGURES 26 AND 27.
Scleral jaundice
Ascites — chronic liver disease
209
2-B
Physical Examination
•
Detailed assessment of the
~ abdomen
~ periphery
•
Assessment of JVP and heart for evidence of right heart failure
•
Assessment for metastatic disease
•
Summary and interpretation of findings
4.2 Physical examination
4.2.1 The gastrointestinal examination
•
Position the patient correctly (bed flat, single pillow, abdomen and chest exposed)
•
General inspection of patients
~ jaundice
~ weight and wasting
~ abdominal distension and peripheral oedema
~ skin (pigmentation and bruising)
~ mental state (encephalopathy)
•
Inspect the hands
~ nails (leuconychia, clubbing)
~ palms (erythema, anaemia, Dupuytren nodularity)
~ flap (asterixis)
SECTION 2-B. FIGURE 28.
Leuconychia
•
Inspect the arms
~ bruising, petechiae, scratch marks
~ spider naevi
~ pulse and blood pressure
•
Inspect the face
~ eyes: jaundice, anaemia, xanthelasma
~ parotid glands
~ mouth: dentition and breath (fetor)
~ tongue
210
Physical
2-B
Examination
•
Inspect the neck and chest
~ cervical and supraclavicular nodes
~ spider naevi
~ gynaecomastia and body hair
~ JVP
4.2.2 The abdomen
•
Inspection
~ scars, herniae (inspect with coughing and straining before palpation).
~ distension or local swellings (inspect on deep breathing)
~ prominent veins
~ skin lesions and striae
~ periumbilical or flank discolouration (Cullen sign, Grey Turner sign)
SECTION 2-B. FIGURE 29.
SECTION 2-B. FIGURE 30.
Dilated abdominal veins in portal hypertension
Combined Cullen and Grey
Turner signs in acute
pancreatitis
• Palpation
~ superficial palpation (tenderness, rigidity, outline of any masses)
~ deeper palpation (define masses; liver, spleen, kidneys, other abnormal masses)
~ measurement of organ(s) if enlarged
~ roll onto right side to palpate spleen
• Percussion
~ visceral outline
~ ascites and shifting dullness (away from examiner; midline to left flank)
~ listen — bowel sounds, bruits, hums
• Inspect the groin (seek patient's specific permission)
~ genitalia
~ lymph nodes
~ hernias
211
2-B
Physical Examination
•
Inspect the lower limbs
~ oedema
~ bruising
~ neurological signs (alcohol)
•
Other
~ ask to perform a rectal (PR) examination
~ temperature chart
~ urine analysis — check this routinely for all systems
5 THE HAEMATOLOGICAL SYSTEM
5.1 Objectives for a haematological examination
•
inspect general appearance
•
inspect the hands and face and eyes
•
examine the lymph node groups: epitrochlear, axillary, facio-cervical, supraclavicular, abdominal, inguinal
•
assess for bone tenderness
•
perform an abdominal examination
•
examine the legs
•
perform a urinalysis with dipsticks
•
provide an accurate summary of your findings — oral and written
5.2 Physical examination
•
General appearance (position patient lying on the bed with one pillow)
~ geographical and ethnic origin — thalassaemia
~ pallor — anaemia
~ bruising — distribution and extent
~ jaundice — haemolysis
~ scratch marks/pruritus — lymphoma or myeloproliferative disorders
SECTION 2-B. FIGURES 31 AND 32.
Spontaneous bruising and abdominal wall
haematoma from warfarin
212
Rectus sheath haematoma confirmed
on CT
2-B
Physical Examination
• Hands
~ nails — koilonychia, dry, brittle, ridged, spoon-shaped nails due to iron deficiency
~ pallor nail beds — anaemia
~ rheumatoid arthritis or other connective tissues disorders, anaemia of chronic disease
~ gout — myeloproliferative disorders
~ pulse — tachycardia
~ anaemic patients have increased cardiac output and compensated tachycardia
because of reduced oxygen-carrying capacity of blood
~ purpura — macular bruising within the skin, which can vary in size
~ petechiae — pinhead bruising on the dependent parts of the body
~ ecchymoses — large bruises
• Epitrochlear lymph nodes
~ must always be palpated
~ place the palm of the right hand under the patient's right elbow. Examiner's thumb can then be placed over the
area that is proximal and anterior to the medial epicondyle
~ enlarged epitrochlear lymph node is suggestive of Non-Hodgkin lymphoma
• Axillary lymph nodes
~ five main groups of axillary lymph nodes — anterior and posterior, central, lateral and medial
• Face
~ eyes
- scleral jaundice — haemolysis
- haemorrhage — platelet or bleeding disorder
- injection — polycythaemia
-
conjunctival pallor — anaemia
~ mouth
- gum hypertrophy — leukaemia especially acute monocytic leukaemia
- gum bleeding
- atrophic glossitis — megaloblastic anaemia, iron deficiency anaemia
- Waldeyer ring — lymphatic tissue involving the tonsils and adenoids — enlarged in Non-Hodgkin lymphoma
• Cervical and Supraclavicular Lymphadenopathy
~ sit patient up and examine from behind and in front
~ eight groups — submental, submandibular, jugular chain, posterior triangle, occipital, postauricular, preauricular and
supraclavicular
• Bone tenderness
~ tap spine
~ press ribs
~ gently press sternum and clavicle
~ enlarging marrow due to infiltration by myeloma, lymphoma or carcinoma
213
2-B
Physical Examination
•
Abdominal examination
~ splenomegaly — palpate, percuss and measure
~ hepatomegaly — palpate, percuss and measure
~ para-aortic lymph nodes
~ inguinal lymph nodes — transverse and vertical groups
~ testicular masses
•
Legs
~ bruising
~ pigmentation
~ scratch marks
~ leg ulcers — haemolytic anaemia
~ neurological abnormalities — vitamin B12 deficiency
6 THE ENDOCRINE SYSTEM
6.1 Objectives for an endocrine examination
•
Inspect for general physical features associated with endocrine disorders
•
Develop skills in symptom pattern recognition in endocrine diagnosis
•
Identify typical appearances of patients with hypothyroidism, hyperthyroidism, acromegaly,
Cushing syndrome, Addison disease, Klinefelter syndrome and hypogonadism
SECTION 2-B. FIGURES 33 AND 34.
Coarse facial features and skeletal enlargement characteristic of acromegaly.
•
Tailor the examination to the specific organ system
•
Evaluate signs of hormone over-secretion or under-secretion
•
Provide an accurate summary of your findings — oral and written
6.2 Physical examination
6.2.1 The endocrine examination
•
•
General inspection: observe for features of specific endocrine disorders: e.g. Cushing
syndrome, acromegaly, diabetes mellitus, hypoglycaemia, thyrotoxicosis, hypothyroidism
Vital signs — blood pressure (postural hypotension) and pulse (bradycardia/ tachycardia)
214
2-B
Physical Examination
• Inspect and feel hands
~ overall size
~ length of metacarpals
~ abnormalities of nails
~ tremor
~ palmar erythema
~ sweating of palms
• Examine axilla
~ loss of axillary hair, a c a n t h o s i s n i g r i c a n s , skin tags
• Inspect eyes
~ visual fields
~ fundi
• Face
~ hirsutism/hairless
~ skin greasiness, acne, plethora
• Mouth
~ protrusion of chin
~ enlargement of tongue
~ buccal/lip pigmentation
SECTION 2-B. FIGURE 35.
Peutz-Jeghers syndrome
• Neck
~ always look first and check effect of movements
~ examine for thyroid enlargement — smoothly diffuse, multinodular, or uninodular
~ palpate lymph nodes from behind and from in front
~ feel for thrill, listen for bruit over thyroid
215
2-B
Physical Examination
• Chest wall
~ hirsutism/loss of body hair
~ reduction in breast size/gynaecomastia
~ nipple pigmentation
SECTION 2-B. FIGURE 36.
Gynaecomastia
•
Abdomen
~ scars, purpura, striae, masses, hepatomegaly, cirrhosis, lipohypertrophy
~ hirsutism
~ external genitalia
~ central fat deposition
•
Legs
~ reflexes, tone
~ diabetic changes
•
Body mass index (BMI — kg/m2)
7 RHEUMATOLOGICAL/MUSCULOSKELETAL SYSTEM
7.1 Objectives for a rheumatological examination
•
•
Perform accurate focused physical examination of joints, bones, tendons, muscles and bursae
Follow sequence of look, move, feel, listen, measure, compare and Interprettor identifying
normal and abnormal findings
•
Assess joints of limbs, spine and face — identify evidence of arthritis and whether acute or chronic,
monarthritic or polyarthritic
•
Identify normal locomotor system anatomy and joint movement ranges, and anomalies including
disorders of stance, gait and deformities
•
Identify extra-articular manifestations of systemic rheumatologic/connective tissue disorders
•
Compare sides in unilateral abnormalities and effects of dominant/nondominant hand in upper limb
disorders
216
2-B
Physical Examination
SECTION 2-B. FIGURE 37.
SECTION 2-B. FIGURE 38.
Knee joint examination
Positive Thomas test — left hip
8 RENAL AND UROGENITAL SYSTEM
8.1 Objectives for a urogenital examination
•
Perform accurate focused physical examination of male and female genitalia and identify abnormalities
•
Perform abdominal, vaginal and rectal examination with accurate interpretation of signs
•
Identify signs of acute and chronic renal insufficiency and their causes
•
Perform focused inguinoscrotal examination with accurate interpretation
•
Identify urinoscopy as a global screening test of wide utility
•
Identify signs and sites of urinary infections
•
Identify and diagnose sites and causes of haematuria, pyuria, bacilluria
•
Identify and diagnose sexually transmitted infections
Vernon C Marshall and Barry P McGrath
217
2-B
Physical Examination
2-B Physical Examination
Candidate Information and Tasks
MCAT 044-057
44
Assessment of a comatose patient
45
Recent onset of poor distance vision in a 17-year-old male
46
A painful rash on the trunk of a 45-year-old child-care worker
47
Acute low back pain and sciatica in a 30-year-old man
48
Fever and a recent rash in a 30-year-old man
49
A heart murmur in a 4-year-old boy
50
A knife wound to the wrist of a 25-year-old man
51
Multiple skin lesions in a Queensland family
52
Subcutaneous swelling for assessment
53
Examination of the knee of a patient with recurrent painful swelling after injury
54
Assessment of hearing loss, first noted during pregnancy, in a 35-year-old woman
55
Examination of a 20-year-old woman who dislocated her shoulder 6 months ago
56
Assessment of a groin lump in a 40-year-old man
57
Eye problems in an Aboriginal community
218
044
Candidate Information and Tasks
Condition 044
Assessment of a comatose patient
CANDIDATE INFORMATION AND TASKS
This young patient has been found unconscious this morning at home by a flatmate. The flatmate
is unable to provide any history, only becoming a flatmate a week ago. When found, the patient
was in bed and there was no explanation as to why the patient might have become unconscious.
The patient is now in the Emergency Department where you are about to do an examination. The
airway is patent, and the patient is breathing without difficulty, the blood pressure is stable
(140/70 mmHg) and temperature is 37.5 °C.
YOUR TASKS ARE TO:
• Perform an examination to determine the level of unconsciousness and to try to identify the
cause.
• Tell the observing examiner what you are doing and why. This can be as you proceed or at
the end of each component of your examination.
• Towards the end of the examination (after approximately six minutes), you will be required
to provide the examiner with an assessment of level of unconsciousness, a list of possible
and likely explanations for the patient's unconscious state and the investigations you would
arrange.
The Performance Guidelines for Condition 044 can be found on page 235
219
045
Candidate Information and Tasks
Condition 045
Recent onset of poor distance vision in a 17-year-old male
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 17-year-old apprentice who is
complaining of poor distance vision of recent onset. He can no longer read notices, street signs,
scoreboards etc. at a distance. He says this is most inconvenient and is gradually getting worse.
Both eyes are affected. He has asked you if he may be short-sighted like his father and his older
brother. He wants to be tested to check for short-sightedness or any other problems, to ask
whether he will need glasses or contact lenses, whether surgery can help and whether he
should see an optician or an eye specialist doctor.
YOUR TASKS ARE TO:
•
Examine the patient's eyes to exclude serious eye disease.
•
Test the patient's visual acuity using the Snellen test chart provided and state your
findings to the patient.
•
Explain the problem to the patient.
You do not need to take any further history.
The Performance Guidelines for Condition 045 can be found on page 241
220
046
Candidate Information and Tasks
Condition 046
A painful rash on the trunk of a 45-year-old child-care worker
CANDIDATE INFORMATION AND TASKS
You are a medical officer in a hospital primary care clinic. A 45-year-old child-care worker
presents with a painful rash on the trunk, as illustrated below.
YOUR TASKS ARE TO:
• Take a history about the presenting problem.
• Explain your diagnosis and the nature of the condition to the patient.
•
Advise the patient about management.
(Near the end of the time allotted, the examiner will ask you one or two questions).
CONDITION 046. FIGURE 1.
The Performance Guidelines for Condition 046 can be found on page 246
221
047
Candidate Information and Tasks
Condition 047
Acute low back pain and sciatica in a 30-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 30-year-old self-employed landscape gardener
who is complaining of disabling left sided low back pain. The pain came on suddenly yesterday whilst lifting a
heavy rock. The pain is also felt down the side of the left thigh and leg and the outer side of the foot. It is made
worse by coughing and movement. The patient could not sleep last night despite taking two Panadeine®
tablets (paracetamol 500 mg codeine phosphate 8 mg per tab). The patient has previously been in excellent
health and has no other relevant past or family history.
Abnormal examination findings are:
He has difficulty standing or walking on his toes on the left side. He has severe limitation to left straight leg
raising, with a positive stretch test, diminished left ankle jerk and diminished sensation to light touch on the
outer aspect of the left foot, and painful limitation of lumbar spine movements, particularly flexion/extension
and left lateral bending.
YOUR TASKS ARE TO:
•
Advise the patient of the most likely diagnosis and management required.
•
Counsel the patient about when he can return to work and any necessary
modifications that may be required.
There is no need for you to take any additional history, nor request any further examination findings. All the
information you need is detailed above.
The Performance Guidelines for Condition 047 can be found on page 248
222
048
Candidate Information and Tasks
Condition 048
Fever and a recent rash in a 30-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a hospital primary care clinic. A 30-year-old man who works as a fashion
consultant in a clothing store is presenting to you with fever and rash, onset two days ago. The
rash appears as in the illustration below. It is a generalised erythematous maculo-papular rash.
You have just finished examining him. Your other findings on physical examination were a fever
of 38.5 °C, an inflamed palate, a palpable spleen and generalised tender lympha-denopathy in
the neck, axillae and groins.
YOUR TASKS ARE TO:
• Take a further focused history from the patient.
• Explain to the patient the possible nature of his condition and how you intend to proceed.
• Briefly discuss differential diagnosis and investigations with the examiner.
CONDITION 048. FIGURE 1.
The Performance Guidelines for Condition 048 can be found on page 252
223
049
Candidate Information and Tasks
Condition 049
A heart murmur in a 4-year-old boy
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. A 4-year-old boy has been seen with his mother. He was taken to
another doctor with a cold whilst the family were on holidays and a soft cardiac murmur was heard. His
parents were asked to bring him to see the family doctor, to decide if anything further needs to be done.
His general health and exercise tolerance are excellent and he is on the 50th centile for height and weight.
He has never been cyanosed. There is no history of heart disease in the immediate family but a cousin had
a hole-in-the-heart operation. His parents feel he has no concerning symptoms.
On examination you have confirmed a soft vibratory midsystolic murmur (grade 2/6) located between the
lower left sternal edge and the apex, which varies with respiration. Full physical examination is otherwise
completely normal. You have finished your history-taking and examination and are about to discuss things
with the child's mother.
YOUR TASK IS TO:
• Explain your diagnosis and further management to the child's mother.
The Performance Guidelines for Condition 049 can be found on page 255
224
050
Candidate Information and Tasks
Condition 050
A knife wound to the wrist of a 25-year-old man
CANDIDATE INFORMATION AND TASKS
You are working as a Hospital Medical Officer (HMO) in a hospital Emergency Department. The
patient you are seeing has presented with a history of a knife wound to the left wrist from an
assailant after an argument in a pub. He has been brought to hospital by an ambulance. The
wound bled profusely at first and was controlled by a pressure dressing which is still on the
wound. The ambulance personnel described the wound as a nasty deep knife wound and its
extent is illustrated in the photograph.
You are about to examine the patient for evidence of damage to important structures. Do not
remove the dressing. Assume that the illustration represents accurately the extent of the skin
wound.
YOUR TASKS ARE TO:
• Perform a focused and relevant examination to determine the likely extent of injury. Explain
to the examiner what you are doing, and why, as you proceed, or at the conclusion of that
segment of the examination.
• Describe your findings and your diagnosis of the injuries to the examiner.
• The examiner will ask you one or two questions at the conclusion of your commentary
CONDITION 050. FIGURE 1.
The Performance Guidelines for Condition 050 can be found on page 257
225
051
Candidate Information and Tasks
Condition 051
Multiple skin lesions in a Queensland family
CANDIDATE INFORMATION AND TASKS
You are working in a general practice in a small country town. A 58-year-old farmer, who lives
with his family, 160 km outside of town, comes to see you as he is concerned about his family
members, having seen a television programme about skin cancer. He has taken photographs of
his family's various skin lesions and asks for your advice about the need for them to seek
medical attention, and whether attendance is urgent. They are all very busy harvesting crops
and will be so for several weeks.
The farmer presents the following photographs showing:
1. The lip of his 35-year-old son
2. The neck of his 50-year-old brother
CONDITION 051. FIGURE 1.
CONDITION 051. FIGURE 2.
3. The face of his 82-year-old father
CONDITION 051. FIGURE 3.
226
4. The leg of his 56-year-old wife
CONDITION 051. FIGURE 4.
051
Candidate Information and Tasks
5. The chest of his 52-year-old brother
(who drinks a large amount of alcohol)
6. The face of his 22-year-old daughter
CONDITION 051. FIGURE 6.
CONDITION 051. FIGURE 5.
YOUR TASKS ARE TO ADVISE HIM AS FOLLOWS AFTER REVIEWING THE
PHOTOGRAPHS:
• Indicate which lesions are likely to be benign, and which are likely to be malignant or
suspicious of malignancy.
• Indicate which member(s) of the family require(s) the most urgent treatment.
• Indicate the mode of spread of any malignant lesions you diagnose.
The Performance Guidelines for Condition 051 can be found on page 264
227
052
Candidate Information and Tasks
Condition 052
Subcutaneous swelling for assessment
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your patient is seeking advice about a subcutaneous
swelling which has been present for about 10 years. The patient thinks it may have grown
slowly over this period but not much change in size has occurred. It has never been painful or
otherwise symptomatic. The patient is not particularly concerned about it but is curious as to its
cause.
YOUR TASKS ARE TO:
•
Perform an appropriately focused and relevant physical examination in order to
determine the nature of the lump.
•
Describe your findings to the examiner as you proceed.
•
Tell the examiner the likely diagnosis.
•
Explain your findings and diagnosis to the patient and indicate what further evaluation
and/or treatment is required.
You may ask relevant questions of the patient during your examination, but your princip task is
to perform a physical examination and come to a diagnosis.
The Performance Guidelines for Condition 052 can be found on page 274
228
Condition 053
Examination of the knee of a patient with recurrent painful swelling
after injury
CANDIDATE INFORMATION AND TASKS
The patient you are about to see in a general practice setting has a history of twisting the right knee six months ago when he
caught his foot on a piece of broken pavement. He fell on the knee and it became swollen and painful on the inner side. The
swelling caused a painful limp for a few days and then subsided with easing of symptoms.
Since then he has had intermittent attacks of pain on the inner side of the knee with swelling, which settles within 24 hours,
and has had difficulty in straightening the leg fully. He is, on occasion, apprehensive when twisting to the right.
Between attacks of pain he can walk normally with only a minor feeling of pain on the inner side of the knee. He is otherwise
well.
This is the first time he has consulted a doctor about this problem.
YOUR TASKS ARE TO:
• Perform a focused and relevant physical examination of the knees, giving a commentary to the
observing examiner as you proceed, describing what you are doing and why, and your findings.
• After seven minutes, you will be expected to present a diagnostic/differential diagnostic plan to the
examiner.
The Performance Guidelines for Condition 053 can be found on page 280
229
^1
054
Candidate Information and Tasks
Condition 054
Assessment of hearing loss, first noted during pregnancy, in a
35-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in a general practice and your next patient is a young woman who gave birth to her
first child one month ago. She is complaining of loss of hearing, which she first noted about
midway through her pregnancy. It has become progressively worse since and affects both ears.
She is otherwise well and her infant (breastfed) is thriving.
YOUR TASKS ARE TO:
• Take a further focused history concerning her hearing loss (limit this to one minute).
• Examine the patient and test her hearing, telling the examiner what you are doing, including
your findings.
• Tell the examiner the type of hearing loss present.
• Inform the patient of the most likely cause of her hearing loss.
• Suggest to the patient what further action is indicated for her hearing loss, including a
prognosis.
The Performance Guidelines for Condition 054 can be found on page 282
230
Candidate Information and Tasks
Condition 055
Examination of a 20-year-old woman who dislocated her
shoulder 6 months ago
CANDIDATE INFORMATION AND TASKS
You are a Hospital Medical Officer (HMO). Your next patient dislocated her shoulder playing
competitive basketball six months ago. It was a typical anterior dislocation which was
complicated by a nerve injury and was treated by closed reduction, several weeks
immobilisation in a sling, subsequent physiotherapy and a gymnasium programme.
The patient has returned for a check up at the hospital outpatient department, has told you the
shoulder now seems to be working fine, and that she would like to recommence playing
basketball next season.
YOUR TASKS ARE TO:
• Perform an appropriately focused and relevant physical examination of the area.
• Describe your findings to the observing examiner as you proceed.
• Discuss future activities with the patient.
• In the final two minutes you will be asked questions by the examiner.
CONDITION 055. FIGURE 1.
Film of previous dislocation 6 months ago
The Performance Guidelines for Condition 055 can be found on page 286
231
056
Candidate Information and Tasks
Condition 056
Assessment of a groin lump in a 40-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a primary care clinic attached to a teaching hospital. Your next patient is a
50-year-old man who works as a builder's labourer. Two weeks ago he felt a pain in his right
groin after heavy lifting at work and a week later noticed a lump in the groin which had not
been there before. The lump is not acutely painful, but is uncomfortable on exertion or
walking. Discomfort is eased on lying down.
He is in good general health, without relevant past history and has no problems with lungs or
heart, bladder or bowels.
YOUR TASKS ARE TO:
•
Perform a focused physical examination to assess the lump, which is illustrated below.
•
Give your diagnosis and management plan to the patient.
You do not need to take any further history.
CONDITION 056. FIGURE 1.
The Performance Guidelines for Condition 056 can be found on page 289
232
Condition 057
Eye problems in an Aboriginal community
CANDIDATE INFORMATION AND TASKS
You are a doctor working in a general practice in a remote setting in the Northern Territory. You
are about to see a nurse who has recently joined the staff of the general practice clinic. The
nurse made a time to see you to discuss eye problems she has noticed in the local Aboriginal
community.
The nurse has taken digital photographs of eye problems that were noticed in a number of
affected individuals (see figures below of four separate individuals). In the upper two
photographs the upper eyelid is everted. The nurse wants you to explain what can cause these
appearances, and what can be done about the problem in the local community.
YOUR TASKS ARE TO:
• Study the photographs and describe the abnormalities to the clinic nurse.
• Explain to the nurse what disease is illustrated in the photographs, and its epidemiology.
• Discuss with the nurse how the problem should be managed.
• Answer any questions that the nurse may have.
CONDITION 057. FIGURE
CONDITION 057. FIGURE 2.
CONDITION 057. FIGURE 3.
CONDITION 057. FIGURE 4.
Figures 1 and 2 were photographs taken after everting the upper eyelid.
The Performance Guidelines for Condition 057 can be found on page 293
233
2-B
Physical Examination
2-B Physical Examination
Performance Guidelines
M CAT 044-057
044 Assessment of a comatose patient
045 Recent onset of poor distance vision in a 17-year-old male
046 A painful rash on the trunk of a 45-year-old child-care worker
047 Acute low back pain and sciatica in a 30-year-old man
048 Fever and a recent rash in a 30-year-oid man
049 A heart murmur in a 4-year-old boy
050 A knife wound to the wrist of a 25-year-old man
051 Multiple skin lesions in a Queensland family
052 Subcutaneous swelling for assessment
053 Examination of the knee of a patient with recurrent painful swelling after injury
054 Assessment of hearing loss, first noted during pregnancy, in a 35-year-old woman
055 Examination of a 20-year-old woman who dislocated her shoulder 6 months ago
056 Assessment of a groin lump in a 40-year-old man
057 Eye problems in an Aboriginal community
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Performance Guidelines
Condition 044
Assessment of a comatose patient
AIMS OF STATION
To assess the candidate's ability to examine and diagnose a patient presenting with coma.
The examiner will have instructed the patient as follows:
You are to play the part of a young person found in a coma in your flat this morning breathing without difficulty
with a Glasgow Coma Score of 10 out of 15 (see following pages about Glasgow Coma Scale).
You are wearing shorts and T-shirt and are feigning unconsciousness and stupor on a hospital bed.
Your responses should be:
• Maintain your level of consciousness and responses as follows during the candidate's examination. Keep
your neck stiff when candidate attempts to flex it.
~ Eye opening: eyes should be closed. Do not open them spontaneously or to verbal
command but open them in response to painful stimulation.
~ Best motor responses: no response to verbal command. Localise pain when
stimulated — move arms towards source of pain or withdraw limb if stimulated.
~ Best verbal responses: use of inappropriate words. When painful stimuli applied
say 'piss off', or 'damn'or 'shit'.
The candidate will probably:
• Do a general examination looking for evidence of injury.
• Examine your eyes and pupils, and will open your eyelids to do this and shine a torch.
• Examine your response to commands and painful stimuli.
• Examine you for neck stiffness (which you have).
• Check your pulse and breathing. Blood pressure and temperature have been given as normal.
• Check your arms for evidence of intravenous drug abuse.
In summary, you are being examined to check the level of coma and possible causes for this.
• You are feigning a partially responsive coma, with a Glasgow Coma Score of 10-11 out of the normal score
of 15, breathing spontaneously, reacting by localising to pain, and with inappropriate verbal response
when stimulated.
• Remain in this role throughout the examination.
• Remember, your neck is stiff if flexion is attempted.
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044
Performance Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate is examining, in the Emergency Department, a comatose young person found in bed this morning,
who is haemodynamically stable.
The candidate is expected to:
•
Examine for evidence of injury to the head or elsewhere.
•
Look for evidence of neck stiffness.
•
Examine eye movement by gently opening the lids.
•
Examine pupillary size and response to light (direct and consensual).
•
If candidates say they are going to test the corneal response, indicate that there is normal eye closure to cotton
wool testing. Similarly, if the candidate wishes to look at the fundi or ear drums, advise that they are normal.
•
Examine breathing pattern — no hyperventilation (as in a hyperglycaemic coma) or hypoventilation (as in a
drug overdose) is present.
•
Examine for evidence of intravenous drug use or insulin injection sites in patients with diabetes.
•
Check for pulse rate, rhythm and character, which are normal.
•
Arrange immediate blood sugar estimation — this may be asked by the candidate as part of the examination.
Alternatively, it should be done as part of the investigations recommended.
After six minutes, the examiner will ask the candidate three questions:
1. 'What is the Glasgow Coma Scale level?' Answer: around 10-11 out of possible 15 (Table 1)
2. 'Name at least four possible causes of the coma?' Acceptable causes would be:
~ drug overdose
~ meningitis
~ cerebral vascular accident (subarachnoid haemorrhage)
~ diabetic hypoglycaemia or hyperglycaemia
~ head injury
~ psychiatric problem
3. 'What investigations would you do?'— all these are required urgently:
~ brain computed tomograph (CT) / magnetic resonance imaging (MRI) (if available-lumbar puncture generally
should NOT be done until the results of head imaging are available. If results from CT/MRI are not
available, lumbar puncture using a 25 gauge needle would be appropriate in view of neck stiffness).
~ blood and/or urine for drug screen
~ serum electrolytes and blood glucose
~ oxygen saturation
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044
Performance Guidelines
KEY ISSUES
• Ability to perform a focused, relevant and accurate examination to aid determination of the level and cause of the
coma.
~Neck stiffness should be tested and identified.
~ No response to verbal command but response to pain.
~ The candidate should indicate appropriate knowledge of the Glasgow Coma Scale.
• Ability to provide an adequate differential diagnosis.
• Ability to describe an initial investigation plan.
~ Mandatory investigations should include Brain CT or MRI. drug screen and blood sugar level. If CT/MRI is not
readily available, a lumbar puncture should be performed if there is no evidence of papilloedema.
• Failure to determine reasonably the level of coma by the Glasgow Coma Scale score.
• Failure to check for neck stiffness.
Coma is a state of deep unconsciousness where the patient shows no meaningful response to external stimuli. The
comatose patient has no verbal response, does not obey commands and does not open the eyes spontaneously or in
response to command.
Stupor is also a state of inaccessible consciousness without awareness, but the stuporous patient shows some
response to painful stimuli. Coma and stupor, and other levels of deep unconsciousness, are best graded on the
Glasgow Coma Scale. This has three elements: eye opening, and best verbal and motor responses to standard
stimuli (Table 1).
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Performance Guidelines
CONDITION 044. TABLE 1. Glasgow
Coma Scale score
CRITERIA
Eyes open
Spontaneously
To speech or verbal command
To pain
No response
Best motor response
SCALE
4
3
2
1
- To verbal command
Obeys
- To painful stimuli
6
Localises pain
Withdrawal
Abnormal flexion (decorticate rigidity)
Extension (decerebrate rigidity)
No response
Best verbal response
5
4
3
2
1
Oriented
Confused conversation
Inappropriate words
Incomprehensible sounds
No response
TOTAL SCORE
5
4
3
2
1
Range of 3-15
NOTE: A score of 15 represents a fully responsive and conscious patient. A score of 3, the
lowest level, a deeply comatose patient unresponsive to external stimuli. A score of
3 of course does not indicate 'brain death' or a 'vegetative state or any other
prognostic features as a single reading
Guidelines for neurological examination and conscious state chart are shown in Figures 1 and 2 1 .
1Reproduced from Hunt P and Marshall V, Clinical Problems in General Surgery, Butterworths 1991
238
CONDITION 044. FIGURE 1.
Conscious state and head injury chart1
1Reproduced from Hunt P and Marshall V, Clinical Problems in General Surgery, Butterworths, 1991.
239
044
Performance Guidelines
CONDITION 044. FIGURE 2.
Guide to recording neurological observation chart1
1Reproduced from Hunt P and Marshall V, Clinical Problems in General Surgery, Butterworths, 1991
240
Condition 045
Recent onset of poor distance vision in a 17-year-old male
AIMS OF STATION
To assess the candidate's knowledge of myopia, and ability to test visual acuity and distance vision using a
Snellen test chart.
The examiner must check the myopic patient's visual acuity in each eye before the examination commences.
The patient should have mild myopia and does not require any special instructions other than the knowledge
of having his eyes tested and providing appropriate responses. The doctor/candidate will explain and perform
the procedures.
EXPECTATIONS OF CANDIDATE PERFORMANCE
Exclude serious eye disease
The candidate should indicate that the following would be examined:
• eyelids (ptosis, retraction of upper or lower lids)
• conjunctiva (chemosis, injection, pallor)
• cornea (ulceration)
• anterior chamber (blood or pus)
• sclera (jaundice)
• orbit (tenderness, paraesthesia)
• eyeball (intraocular pressure, glaucoma)
The candidate should indicate use of the ophthalmoscope to:
• test the red reflex (to exclude cataract);
• examine the retina (detachment, exudates, haemorrhage, new vessel formation);
• examine the optic disc (bulging, blurring of margins): and
• examine the macula (exudates).
The pupil will not be dilated. The candidate is expected to describe the proposed use of the opthalmoscope to
the examiner who will then say 'fundoscopic examination is normal'.
A thorough examination of the eye will also include instillation of fluorescein (cornea), dilatation of the pupils
(appropriate view of the posterior chamber), tonometry (intraocular pressure) and the pinhole test.
The pinhole test
A pinhole test card should be placed in an obvious position and used by the candidate for both eyes If visual
acuity is not improved by looking through a card with a 1 mm pinhole, the defective vision is not
solely due to a refractive error. Macular degeneration, cataract and glaucoma will need to be
excluded. If the unaided visual acuity is less than 6/12, the patient should be referred to an
ophthalmologist.
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045
Performance Guidelines
Test visual acuity
The term 'visual acuity' refers to the clarity of vision (from the Latin acuitas or sharpness). Visual acuity is expressed as
a proportionate relationship between the subject's vision and a person with normal vision. The subject is asked to
read from a Snellen chart. The chart, with letters of different sizes on each of its ten or eleven lines, is placed 6 metres
(20 feet) from the subject.
An individual with visual acuity of 6/6 (or 20/20 if feet are used) is just able to identify a letter whose height subtends 5
minutes of arc at the eye. Such letters are found on one of the lower lines of the Snellen chart. Acuity of this degree is
referred to as normal vision. Being able to discern letters below this line shows increased visual acuity and if the
individual can only decipher letters above this line, the visual acuity is diminished.
A near-sighted (myopic) individual will have better visual acuity at close distance, whereas a far-sighted (hyperopic)
person will have better visual acuity at far distance.
With the onset of presbyopia, near visual acuity diminishes and reading glasses are required.
Testing visual acuity
Visual acuity is measured using the Snellen chart, displaying letters of progressively smaller size. Visual acuity is
recorded in the form of a fraction but it is NOT a fraction in the mathematical sense of the word. The numerator
indicates the distance of the patient from the chart (e.g. 6 metres), and the denominator indicates the distance at which
the normal eye can read the line. Normal vision is 6/6 (20/20).
Visual acuity of 6/6 means that the test subject sees the same line of letters at 6 metres (20 feet) as that seen by a
person with normal sight at 6 metres (20 feet), whereas 6/12 (20/40) vision means that the test subject sees at 6
metres (20 feet) what a normal person sees at 12 metres (40 feet). Because the visual nomenclature used does not
représenta mathematical fraction, it is incorrect to say that 6/12 represents 50% of normal sight. In fact, for legal
assessment of visual impairment, 6/30 is regarded as a 50% impairment.
Visual acuity of 6/5 (20/15) vision is better than normal 6/6 (20/20). A person with 6/5 (20/15) vision can see objects at
6 metres (20 feet) that a person with normal vision sees at 5 metres (15 feet).
Note that the Snellen notation applies only to distance vision. Near vision is recorded using font size, usually in this
country the American point-type. Thus normal reading vision is N5 (5 point type). Newsprint is N8 (8 point type).
Levels of vision
6/6 — Normal vision. This is the visual requirement for a fighter pilot
6/12 — The visual requirement for a Driver's Licence in Australia
6/60 — Legal blindness.
Testing should be done as follows:
• The patient faces a Snellen chart at 6 metres distance. Formal testing requires a distance of 6 metres (20 feet),
necessitating use of a large room or a small room with a mirror to adjust for the distance. A 6-metre chart should
always be employed for formal visual acuity testing. Preliminary office testing can employ a 3-metre chart.
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Performance Guidelines
• Explain procedure to patient: Start reading at top (largest) line of letters. If only the top line can be read, acuity is
6/60. If the patient is unable to read the top line, the chart should be moved closer to the patient, 1 metre at a time,
until the top line can be read. If the top line can be read at 3 metres, this is recorded as 3/60. If the patient cannot
see 1/60, he is asked to identify a moving hand, and this is recorded as 'Hand Movements' (HM). If unable to see a
moving object, a light is shone in the eye and the patient is asked if he can appreciate the light, and this is recorded
as 'Perception of Light' (PL). If the patient can point to the light accurately, this is recorded as 'PL with accurate
projection'. If the light is not seen, the acuity is NLP (No Light Perception).
• Visual acuity corresponds to the lowest line which can be read. The small numbers corresponding to the lowest line
which can be read give the denominator — the distance in metres at which a person with normal vision can read
the line. In a line with 5 or more letters, the patient should correctly identify 3 letters to be regarded as having read
the line.
• Examine each eye separately by using an occlusive card in a systematic way which includes asking the patient to
read the lines backwards when testing the second eye.
• If the visual acuity is worse than 6/6, the candidate should perform a pinhole test. Ask the patient to hold a piece of
paper with a 2 mm hole in it over the uncovered eye. This manoeuvre utilises the 'pinhole camera effect' and results
in an improvement in visual acuity if a refractive error is the cause of the diminished acuity. The patient should be
referred for refraction and prescription of glasses.
• The candidate should give findings to examiner in the conventional way, normal vision being 6/6. The smaller the
ratio, the poorer the vision (6/12, 6/24, etc).
Explain problem
• Nature of myopia.
• Management options.
KEY ISSUES
• Exclusion of serious eye disease with ophthalmoscope and pinhole test.
• Correct use of the Snellen test chart.
• Accuracy of examination (compare with examiner's findings).
• Diagnosis — must state myopia, or short-sightedness or near-sightedness.
• Patient counselling/education — cause, treatment, need for periodic check of intraocular tension when over 40
years of age.
CRITICAL ERRORS
• Failure to exclude serious eye disease.
• Failure to mention myopia as a possible diagnosis.
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Performance Guidelines
COMMENTARY
A comprehensive history and careful physical examination will provide a diagnosis in most common ophthalmic
disorders.
Although unlikely in this case, the possibility of the patient's complaint of recent impaired vision being due to a
serious cause (namely retinal detachment, glaucoma, cataract or macular degeneration) should be considered by
the candidate Ophthalmoscopic examination and the use of the pinhole test cover these concerns at this stage of
assessment of vision.
Myopia (near-sightedness or short-sightedness) is a common inherited condition which in most cases is due to the
axis of the eyeball being too long so that the visual image is focused in front of the retina. Less often the refractive
power of the lens is too strong.
The condition is readily corrected by the use of a concave (minus) lens. Onset can be in childhood, but more
commonly in late teens. The condition tends to worsen in early adult life and then stabilises.
The prescription:
The refractive error of the eye can be expressed in numeric terms. The power of the lenses necessary to correct
vision is measured in units called dioptres (see below). The first number in a spectacle prescription designates the
amount of myopia (minus numbers) or hyperopia (plus numbers). The second number (if present), indicates the
amount of astigmatism. The third number indicates the axis of the steepest meridian of the cornea (e.g. +3.00/-2.50
X 170'). The fourth number is the additional correction needed to bring the focal point of the eye to the reading
distance.
The dioptre is the unit of measurement of the strength of a lens. A lens deviates light and the amount of deviation is
proportional to the amount of curvature and the density of the lens. A lens of power of 1 dioptre has a focal length of
1 metre (i.e. parallel rays of light are brought to a focus 1 metre from the lens). As the refractive power of a lens
decreases, the focal length increases. The strength of a lens = 1/focal length. Thus a 4-D lens has a focal length of 'A
metre. The power is a negative number of a concave lens (myopia, near-sightedness) or a positive number for a
convex lens (hyperopia, far-sightedness).
The corrective lens can be prescribed by an optician, although an initial assessment by an ophthalmologist is
preferable to exclude any other cause of visual impairment, especially retinal detachment and macular degeneration,
both more common if myopia is severe.
Contact lenses can be worn to correct myopia, without the risks of surgical correction.
Corrective operations (excimer laser surgery) can produce excellent results by altering corneal curvature and thus
the refractive power of the eye. This procedure is not without significant risk. Otherwise glasses will need to be worn.
Reading is not affected much until middle age. Myopia can affect the accurate measurement of intraocular pressure,
and therefore intraocular pressure should be checked periodically to detect chronic open angle glaucoma which is
asymptomatic in the early stages. This applies to all patients, and particularly to myopes.
The 'acute red eye', although not relevant to this case, is an important and urgent clinical problem. Most of the
causes of red eye (conjunctivitis, foreign body, inflammation ulceration, glaucoma and subconjunctival
haemorrhage) are associated with pain and/or trauma and can be excluded on the history alone in this patient.
244
Sudden loss of vision is usually associated with a vascular or neurological problem and again,
these types of problem are not relevant in the present case. Diabetes mellitus must be
considered, as presentation of this disorder with an ophthalmological complication may occur.
Some diabetics present with cataract; others with mature onset diabetes may present with poor
central vision due to oedema of the macula. The assessment of the ophthalmoscope and pinhole
test should exclude the serious disorders that can be associated with gradual visual loss (and
others such as retinal detachment, glaucoma, cataract and macular degeneration).
CONDITION 045. FIGURES 1 AND
2. Visual acuity charts (not to scale)
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Performance Guidelines
Condition 046
A painful rash on the trunk of a 45-year-old child-care worker
AIMS OF STATION
To assess the candidate's approach to a patient with a dermatomal rash from herpes zoster plus weight loss
and tiredness, which could be incidental but may be associated with underlying malignancy. These symptoms
need to be further assessed.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a child-care worker in a kindergarten. You are single and live by yourself.
Opening statement:
'I've had a pain in my lower chest and now there is this rash. '
Answer questions about your condition as follows:
•
You have been feeling a bit unwell for a few days.
•
You have had a burning pain over your lower chest and flank for a few days.
•
You noticed today that you have developed a blistery rash that runs in a line around your chest and
abdomen in the area where the pain started.
•
In addition, you have lost 6 kg in weight over the past few months and have been feeling more tired than
usual (you have nothing to add to this general statement. You have noted no disturbance to any body
system function).
•
You have had no serious past illnesses, there is no relevant family history. You have no allergies and are
on no medications.
Describe the pain and the skin rash without prompting. Do not volunteer the weight loss and associated recent
tiredness unless questioned first about How has your health been in general?'or something along those
lines. You have been considering having a checkup but have no other symptoms, and you had not considered
that there might be something seriously wrong until the pain and this rash appeared.
EXPECTATIONS OF CANDIDATE PERFORMANCE
•
History
•
Diagnosis
~ Typical history and rash (see Figure 1) of herpes zoster with prodromal preherpetic neuralgia.
~ Must make diagnosis of herpes zoster. Must show concern over recent weight loss and tiredness.
•
Initial management
~ Treat the rash with symptomatic measures such as calamine or cold compresses and a drying lotion.
~ Use analgesics with or without codeine.
~ Treat with antiviral medications if patient presents (as in this instance) within firs! 72 hours of the rash —
aciclovir, famciclovir or valaciclovir.
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Performance Guidelines
~ Monitor for the development of postherpetic neuralgia which may require further management.
~ Examine patient and perform investigations for any possible precipitating cause. In this case, the weight loss and
tiredness demand further investigation (no details are required at this stage).
• Patient education and counselling
~ Explain the cause to the patient (i.e. relationship of herpes zoster to varicella [chicken pox]).
~ Explain that the condition is only mildly contagious, but that chickenpox can be acquired by those persons in close
contact with the patient who have not previously had chicken pox. Therefore appropriate infection control
measures need to be taken including management of occupational and community contacts (for example, she is a
child-care worker in a kindergarten and young children and babies should not be exposed to vancella zoster virus).
After 5-6 minutes, if the candidate has not discussed these issues, the examiner will ask
~ 'Are there any unusual features of the condition in this patient?
~ 'How would you manage this particular patient?'
KEY ISSUES
• History-taking must elicit weight loss and tiredness.
• Diagnose herpes zoster/shingles
• Management must consider use of aciclovir or other related antiviral drugs.
• Must advise further assessment regarding weight loss and tiredness and discuss implications of infectivity.
CRITICAL ERRORS
• Failure to diagnose herpes zoster.
• Failure to consider the possibility of an additional underlying cause in this patient.
• Failure to assess implications for contacts in community and work settings.
COMMENTARY
Herpes zoster (shingles) is caused by reactivation of varicella zoster virus (VZV) acquired originally through primary
infection with chicken pox.
• The condition is more common in people over 50 years of age.
• The virus is found in the dorsal root ganglion. In most cases the reason for reactivation is unknown, although
occasionally this can be related to an underlying malignancy such as a lymphoma, leukaemia or
immunosuppression including HIV infection.
• Occasionally patients may get rare complications including meningoencephalitis.
• Post-herpetic neuralgia is an important sequel. The incidence of post-herpetic neuralgia increases with age,
affecting around 30-50% of adults aged 70-79 years.
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Performance Guidelines
Condition 047
Acute low back pain and sciatica in a 30-year-old man
AIMS OF STATION
To assess the candidate's ability to diagnose and treat the problem of acute exertion-related low back pain
and sciatica.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a self-employed landscape gardener aged 30 years. You have consulted this doctor because of the
sudden onset of severe disabling pain in your lower back yesterday which moved down your left thigh and leg
into your foot. It came on when you lifted a heavy rock and you have not been able to work. You could not
sleep last night despite taking Panadeine® tablets. It hurts to move and to cough.
You usually keep in excellent health with no serious medical problems in the past.
The doctor has taken your history and examined you. He will explain the problem and what you have to do.
•
Show concern about how you are going to be able to work now and in the future.
•
Appear to be in severe pain - sit uncomfortably be restless.
•
State dissatisfaction with level of pain relief — you could not sleep last night.
•
Expect the doctor to 'do something' to get rid of the pain.
•
Resist advice (irrationally) not to go to work even in a supervisory capacity because of important jobs
needing to be finished.
•
Become compliant if the doctor explains the situation and gives appropriate advice.
Questions to ask unless already covered (candidate's likely
response is detailed in brackets):
•
W h a t h a s h a p p e n e d t o m y b a c k ? ' (Explain 'slipped disc' — intervertebral disc prolapse with
•
H o w d o e s t h i s h a p p e n ? ' ( V e r y common, related to stress on back whilst lifting).
•
H o w l o n g w i l l I b e a w a y f r o m w o r k ? ' (Depends on progress. Usually settles rapidly with I
herniation of nucleus pulposus — use of a diagram can be helpful).
adequate rest. If so, off work for 1-2 weeks. If pain does not settle, must be investigated by CT orMRI).
•
' S h o u l d I s e e a c h i r o p r a c t o r ? ' (Definitely not at this stage; manipulation may worsen the
condition).
•
W i l l I b e a b l e t o l i f t h e a v y o b j e c t s i n t h e f u t u r e ? ' (Give advice on how to lift with gooi
self-maintenance strategies).
•
' W i l l I a l w a y s h a v e a b a d b a c k ? ' { N o , likelihood of recovery is good).
•
'Do / n e e d t o s e e a S p e c i a l i s t ? ' (Not at this stage, will be arranged if symptoms persist!
•
' C a n ' t I h a v e a n o p e r a t i o n t o f i x i t a n d r e l i e v e t h e p a i n ? ' (Usually not necessary, but wil
•
' W h a t e l s e c a n I t a k e f o r t h e p a i n ? ' (Panadeine forte03).
depend on progress).
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EXPECTATIONS OF CANDIDATE PERFORMANCE
Diagnosis and explanation of condition
• Anatomy of lumbar spine (this is an L5/S1 level problem, involving the S1 nerve root)
• Causes of pain particularly disc prolapse with nerve impingement/irritation (radiculopathy).
• Expected course both short and long term — most resolve completely
• A diagram would assist.
Immediate management
• Adequate rest is essential (3-4 days rest at home, but up and about as tolerated)
• Pain-relieving medication — Panadeine®, Panadeine forte® or similar (including NSAID).
• Subsequent physiotherapy and back-strengthening exercises.
• Indications for further investigation — lack of, slow, or incomplete resolution. Then needs CT
orMRI.
• Avoidance of manipulation.
• Gentle traction may have a place in treatment if progress slow — would be advised after
specialist referral.
• Emphasis on positive approach. Prognosis for recovery within a few weeks is good despite
ankle jerk being affected.
• Need for investigation — this is particularly important if there is no improvement, or there is
continuing evidence of neurologic or muscle weakness (CT acceptable, MR I preferred, plain
X-ray gives limited information only).
• Physiotherapy — stretching and arching active mobilising exercises appropriate once initial
symptoms ease.
• Orthopaedic, neurological or rheumatologic consultation — will be required for lack of
resolution.
Preventive measures
'Back education' including advice regarding bending and lifting, and the value of walking,
swimming.
Future management
Reassessment in short term (2-3 days). This is essential.
• Ability to determine the likely cause of the sciatica and to explain the cause to the patient.
• Adequate knowledge of the management of a patient with acute sciatica including what further
investigations or referral are required and when these should be done.
• Ability to advise the patient about work practice modifications required to prevent a recurrence
of the problem.
• Ability to advise early rest and short term review.
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CRITICAL ERRORS
• Failure to make correct diagnosis of a likely disc lesion.
COMMENTARY
Low back pain is a very common problem in Australian society. The incidence increases with age and is more
common in manual workers than sedentary workers.
A major problem in spinal assessment is the fact that there is often a poor correlation between clinical presentation
(the patient's history and examination finding) and the imaging findings. Imaging abnormalities will be found with
increasing frequency in individuals with or without accompanying symptoms from their third decade onwards.
Back pain, acute and chronic, is thus one of the most common of all conditions encountered but precise pathology is
very frequently lacking. The portmanteau and nonspecific term 'Mechanical low back pain' is useful in that it codifies a
very common condition from which almost all individuals will suffer at some time of their lives. In such instances the
precise pathology is indeterminable and no specifically diagnostic imaging or other test is available.
Back pain may (or may not) follow an identifiable injury or strain as occurred in this patient Pain is usually
self-resolving over a period of days or weeks, but may become recurrent, relapsing or chronic, and is influenced by
cultural, psychological, socioeconomic and other personal factors in its incidence and persistence. Against such a
background, it is hardly surprising that the condition and its preferred treatment remain controversial.
The outcome of physical treatments such as massage, manipulation, heat, light, sound/ultrasound, electricity and
magnetism (and surgery) are each difficult to separate from placebo and are prone to fashion and fetish. Clinical
studies are possible and literature search and meta-analysis can be helpful and reveal (for example) that laser
treatment of low back pain is free of concerning side-effects, but gives short term outcomes no different from placebo,
and is expensive and not cost-effective.
Distinguishing true radicular sciatic pain ('sciatica') due to nerve root compression requires symptoms of pain of
lancinating or cramping type, extending usually from low back and buttock down the leg to foot and toes
corresponding to sensory disturbance within the dermatomal distribution of appropriate nerve roots (most commonly
L5 or S1 ), exacerbated by straining or coughing, with positive nerve tension signs, and sometimes with objective
motor weakness and sensory loss corresponding to the appropriate motor nerve root. Such a constellation of
objective signs (as in this patient) is virtually pathognomonic and diagnostic of nerve root foramen compression (from
intervertebral | disc prolapse, facet joint arthropathy or other encroachments on the relevant nerve root or spinal
canal). Confirmation of the diagnosis can usually be made by noninvasive imaging, of which MRI is the most accurate.
Persistence of unrelieved pain after one month is an | indication of the need for a full history and examination
(including diagnostic imaging), concentrating on the search for pointers of more serious pathology (malignancy,
referred back pain from intra-abdominal lesions, bone infections, or cauda equina symptoms such as interference with
bowel or bladder control).
This case scenario has been chosen to exemplify the classical syndrome of nerve impingement radiculopathy, the
most likely diagnosis being compression from an intervertebral disc prolapse between L5 and S1.
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By contrast, most cases of simple mechanical back pain due to musculoligamentous soft tissue strain injuries
will resolve within one to two weeks with explanation and encouragement, early mobilisation without bed rest (
' d o n ' t t a k e b a c k p a i n l y i n g d o w n ) and simple analgesics, aided where indicated by a short course of
physical therapy concentrating on early mobilisation and an active exercise program, and patient education
regarding good back strategies.
Plain radiographs for patients with persisting chronic pain rarely are of clear cut diagnostic value, but may
show loss of disc height, gas formation in the nucleus pulposus, adjacent vertebral marginal sclerosis and
osteophytes, or other radiological signs of lumbar vertebral spondylosis affecting the facet joints. However,
similar radiological signs or evidence of minor spondylolysis or spondylolisthesis are also present commonly in
nonsymptomatic middle-aged or elderly people.
MRI is the investigation of choice for defining spinal pathology when surgery is being considered. Surgery is,
however, indicated in only a very small percentage of patients with low back pain and it is quite rare to
demonstrate treatable new pathology in patients with chronic low back pain, which has lasted for more than a
year.
Associated job dissatisfaction, depression, obesity and socioeconomic deprivation are commonly found in
such instances. Long-term treatments with laser, shortwave diathermy, ultrasound, acupuncture,
transcutaneous electrical nerve stimulation, formal physiotherapy or chiropractic have not convincingly been
demonstrated to have other than placebo effects.
The effects of repeated image-guided facet joint, epidural or nerve root foraminal injections of local anaesthetic
or corticosteroids are also disappointing in the long-term. Percutaneous semisurgical procedures
(radiofrequency rhizolysis) also seem of little convincing long-term value.
Surgical techniques have improved in the small group of patients requiring surgery, and release surgery for
focal major nerve root compressions confirmed by imaging can be dramatically effective. By contrast, spinal
fusion techniques for chronic low back pain are various, results can seldom be guaranteed and persisting pain
after surgery is common.
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Condition 048
Fever and a recent rash in a 30-year-old man
AIMS OF STATION
To assess the candidate's diagnostic approach to a young man presenting with fever and rash of 48 hours
duration with signs of splenomegaly and lymphadenopathy.
The examiner will have instructed the patient as follows: Opening statement:
'I think I may have developed an infection. '
•
Follow with:
~ You have been feeling unwell for two days.
~ You have a fever and a sore throat.
~ You have also developed a rash over the past one to two days.
~ The rash is all over your body, and is especially apparent on the face and trunk.
•
In response to questions the doctor may ask:
~ The rash is not itchy.
~ You have 'aches and pains' throughout your body in the legs, arms and back.
~ You have a headache and bright lights hurt your eyes.
~ You have previously considered your health to be good.
~ You have had no serious past illnesses or family history of relevance.
~ You have no allergies and take no medications.
~ No history of mental illness, no history of blood transfusion.
~ You do not use injectable drugs.
~ You have been in a sexual relationship with another man for two years and have been having anal sex
without condoms for a few months now. You have also had a number of casual sexual relationships in
the past six months.
~ You have never had an HIV test in the past.
Answer the doctor's questions honestly. Be open about your homosexuality but do not reveal this without
specific questioning by the doctor. Be very concerned about the possibility of HIV infection when this is
mentioned, and anxious to proceed with investigations at once.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The key to diagnosis is the history of unprotected anal sex.
•
Approach to patient: the history should be taken and diagnostic possibilities discussed in a matter of fact
and nonjudgmental way. Support for the patient should be shown when the possible seriousness of his
condition is discussed.
•
History: must obtain detailed sexual history.
•
Explanation to patient: his condition is possibly due to one of a number of viral infections, such as
infectious mononucleosis. However, the most likely infection is with human immune deficiency virus (HIV)
and this must be confirmed or excluded by laboratory investigations. These must include HIV serology.
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Informed consent is required for HIV testing: ensure patient has pretest counselling.
~ Laboratory tests may not be clear during time of acute seroconversion illness and may require
consultation with HIV laboratory and/or specialist unit to manage his condition.
~ If HIV infection is confirmed, referral to a specialist infectious diseases unit is required
for management during seroconversion illness.
~ Other tests are indicated (see differential diagnosis) and the candidate may mention
other viral causes of this patient's fever, rash, sore throat, lymphadenopathy and
splenomegaly.
~ The examiner should intervene at this stage and say: 'We should now discuss the differential
diagnosis and appropriate investigations. '
•
Differential diagnosis apart from HIV:
~ Epstein-Barr virus infection;
~ secondary syphilis;
~ toxoplasmosis;
~ rubella;
~ cytomegalovirus (CMV);
~ herpes simplex infection;
~ disseminated gonococcal infection;
~ hepatitis A. B, C, D or E; and
~ other viral infections.
•
Investigations — these are related to the differential diagnosis and should include:
~ full blood examination and Epstein-Barr serology:
~ tests for rubella, CMV infection and toxoplasmosis;
~ Venereal Disease Research Laboratories/syphilis serology;
~ liver function tests; and
~ tests for hepatitis A,B,C,D or E.
KEY ISSUES
• History must include sexual history
• Investigations must include HIV serology.
• Differential diagnosis must include HIV infection.
• Approach to patient must discuss informed consent for HIV testing.
CRITICAL ERRORS
• Failure to consider HIV infection as a likely cause of this patient's presentation.
• Failure to discuss informed consent for HIV testing.
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COMMENTARY
Diagnosis of HIV infection requires a careful history to identify potential high-risk behaviour and recognition of the
constellation of clinical symptoms and signs. The rash of acute HIV infection is usually an erythematous,
maculopapular rash.
From 40-90% of patients who have acquired HIV infection will develop an acute febrile illness within the first six weeks
of infection, often sooner. Common symptoms include: fever, night sweats, malaise, myalgia, arthralgia, headache,
photophobia and sore throat. Neurological manifestations including headache and photophobia are common as well
as transient neurological signs including peripheral neuritis and other central nervous system manifestations. These
symptoms usually last for less than two weeks.
Other nonspecific viral sequelae such as mucosal ulceration, desquamation and herpes simplex may also occur.
Acute symptoms are self-limiting. The condition resembles infectious mononucleosis but is seronegative for infectious
mononucleosis. Chronic lethargy, depression and irritability may persist after initial illness. Key to diagnosis in this
patient is checking for recent risk exposure history of unprotected oral or anal sex. reuse of contaminated needles or
other exposure, such as occupational exposure.
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Condition 049
A heart murmur in a 4-year-old boy
AIMS OF STATION
To assess the candidate's ability to diagnose an innocent heart murmur in a young child and to advise a concerned
parent.
EXAMINER INSTRUCTIONS
Opening statement:
'What is the matter with my child?'
The examiner will have instructed the parent as follows:
You are the parent of an only child, puzzled and concerned at being told that the child may have something the matter
with his heart. Be prepared to accept reassurance if the explanation is adequate. If not, insist on referral and ask what
tests might be performed.
EXPECTATIONS OF CANDIDATE PERFORMANCE
This is almost certainly an innocent murmur. No concerning symptoms or signs are present which might suggest an
alternative diagnosis. Parents need reassurance that the child is normal and that normal physical activity is allowed.
Referral to a paediatrician/paediatric cardiologist is only indicated if parents wish it, or seem unconvinced. The
consultant would consider echocardiography.
It would be reasonable do to a chest X-ray and ECG, depending on degree of parental concern. This is unlikely to
show any abnormality and may be reassuring, and may then render unnecessary further referral to a cardiologist.
KEY ISSUES
• Ability to assess confidently the features of an innocent heart murmur.
• Avoidance of unnecessary extensive investigation.
CRITICAL ERROR - none defined
COMMENTARY
Cardiac murmurs in young children are very common. It is estimated that careful auscultation under ideal
circumstances will detect an innocent soft murmur in over 50% of normal four-year-olds. Hence medical facilities
would be overwhelmed if all of these murmurs were referred for specialist assessment.
Primary care physicians should be confident in distinguishing innocent functional murmurs from those that are
associated with an organic heart lesion. Rheumatic fever in our community is unusual these days unless practising in
areas where large numbers of Aboriginal or Torres Straight Islander peoples are treated. So the usual task is to
differentiate an innocent murmur from one due to an organic heart lesion, most likely of congenital origin.
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As in many situations in paediatrics, the diagnosis can usually be determined by a careful history and examination. The
child with an innocent murmur, is well and thriving, has a normal exercise tolerance, is not cyanosed, and does not
suffer from recurrent chest infections.
Physical examination reveals:
•
a soft midsystolic murmur, which is an almost musical high-pitched murmur at the base of the heart with no
radiation;
•
the murmur varies with posture and respiration, and has no associated thrill; and
•
the murmur has no diastolic component.
In comparison, an organic murmur may be:
•
loud;
•
associated with a palpable thrill;
•
radiating either to the axilla or neck;
•
associated with cyanosis; and
•
associated with significant symptoms.
In determining the possible aetiology, the clinician should seek information along these ines to determine if any of
these features exist in the history, and must perform a thorough examination.
If all features indicate an innocent heart murmur, no investigations are warranted. The parent should be reassured of
the innocent nature of the murmur and that the practitioner will continue to observe the child until the murmur
spontaneously disappears, usually between the ages of five and seven years.
If the parents are still concerned despite adequate explanation and reassurance, referring the child to a paediatrician
who is skilled in assessing murmurs is acceptable. If necessary, the paediatrician will refer the child to a paediatric
cardiologist for full cardiological investigations, including echocardiography.
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Condition 050
A knife wound to the wrist of a 25-year-old man
AIMS OF STATION
To assess the candidate's ability to diagnose tendon and nerve injuries in a deep wound
EXAMINER INSTRUCTIONS
The knife wound is across the wrist just above the crease line as in the illustration and the
candidate can observe this.
The examiner will indicate to the candidate
'The bleeding has been stopped by the dressing. Proceed to your examination to ascertain the
extent of injury describing your findings to me, the examiner. '
The examiner will have instructed the patient as follows:
You have presented to the Emergency Department with a knife wound to the left wrist produced
by an assailant after an argument in a pub. You lifted your arm to protect your face and he
slashed your wrist with a knife. It bled a lot at first, but your friends reduced this by local pressure
and the ambulance staff put on a dressing which controlled the bleeding, but which you think
made your hand feel numb. You are unable to move your fingers freely.
Specifically, you have lost sensation and muscle power as follows:
• Sensation to touch and pin over the whole palmar aspect of your hand, fingers and thumb. The
numbness and loss of feeling extends onto the back of the fingers and thumb, over the nails
and the end of the joint.
• You should hold your hand as depicted in the illustration so all the fingers and thumb are
stretched out straight. When asked to flex your fingers and thumb, you are unable to do so at
the end two joints of the thumb, and unable to bend any of the three joints of your four fingers.
You are able to stretch them out straight again if the candidate bends them forwards.
• You also cannot flex your wrist (bend it forward), but are able to extend it (bend your wrist
back).
• If asked to put your thumb across to touch the other fingers, you cannot move the other fingers
towards the thumb (cannot bend fingers and thumbs inwards towards the palm); and you
cannot move the thumb across the palm towards the base of the ring and little fingers.
• If asked to do the movement of abduction of the thumb by lifting the thumb away from the
palm, you cannot.
• You can only move the thumb outwards and away from the other fingers in the plane of the
palm.
• If asked to hold a card between your fingers, or to move your little finger away from the others,
you cannot.
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EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate is expected to diagnose accurately the deep and extensive injury to:
•
the median nerve
•
the ulnar nerve.
•
all of the following flexor tendons, which have been severed above the wrist:
~ wrist flexors: f l e x o r c a r p i r a d i a l i s , u l n a r i s , ( p a l m a r i s l o n g u s )
~ finger flexors
-
f l e x o r d i g l t o r u m s u p e r f i c i a l l s to all four fingers (normally flexes proximal inter-phalangeal
[PIP] joint)
-
f l e x o r d i g l t o r u m p r o f u n d u s to all four fingers (normally flexes distal interphalangeal [DIP]
joint)
~ thumb flexor: f l e x o r p o l l i c i s l o n g u s (normally flexes thumb interphalangeal [IP] joint).
•
Arteries — probably one or both, but these injuries have not disturbed the viability of the hand.
•
Neurologic effects — Paralysis of all thenar and hypothenar small muscles of the hand preventing
~ palmar abduction of the thumb ( a b d u c t o r p o l l i c i s b r e v i s — median nerve)
~ abduction of little finger ( a b d u c t o r d i g i t i m i n i m i — ulnar nerve)
~ flexion of metacarpophalangeal [MP] joints of fingers (lumbricals, interossei — ulnar
and median nerves); and of MP joint of thumb (flexor pollicis brevis)
~ abduction/adduction of fingers (interossei — ulnar nerve)
~ opposition — median and ulnar nerves
~ ulnar adduction of the thumb (adductor pollicis — ulnar nerve)
•
Sensory loss is of combined median/ulnar nerve injury.
Knowledgeable candidates may recognise that the dorsal cutaneous branch of the ulnar nerve has been
spared.
Candidates are expected to conduct a logical and systematic examination to detect nerve, tendon and
vascular injury. Candidates should achieve the diagnosis of combined median and ulnar nerve and flexor
tendon injury. Knowledge of all of the individual muscle groups is not expected but candidates should be
aware of the effects of median and ulnar nerve division and the appropriate tests (sensory and motor) to
detect these. Candidates should also be expected to recognise that the failure to flex the distal joints of the
fingers and thumb are due to concomitant tendon injury, and not to the effects of nerve damage to median and
ulnar nerves at the level of the cut just above the wrist.
At the end of the candidate's commentary, or at seven minutes, the examiner will ask:
•
'Why is he unable to hold a card between his fingers?'
•
'Why is he unable to flex the end joints of fingers or
~ Answer: Because the ulnar nerve injury has paralysed the interossei.
thumb?'
~ Answer: Because the long tendons have been damaged.
KEY ISSUES
•
Ability to correctly identify the structures damaged, by an appropriately focused examination.
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CRITICAL ERROR
• Failure to identify the combination of nerve and tendon injury.
COMMENTARY
Cuts to the wrist and hands from knives, glass breakages and other sharp items need careful evaluation to
identify damage to important underlying structures, particularly major blood vessels, nerves and tendons.
Of the three main nerves of the arm (median, ulnar and radial), the median and ulnar nerves run to the hand on
the volar aspect of forearm and wrist, carrying motor fibres to the intrinsic short muscles of the hand, sensory
fibres to the vital grasping surfaces of thumb and fingers, and autonomic sympathetic fibres subserving
sweating and vasomotor responses. The median nerve, as its name implies, runs a midline course throughout
the forearm and lies in close proximity to the tendon of flexor digitorum superficialis running to the middle
finger. The important sensory and motor branches are given off after the nerves have entered the hand by
passing under (median nerve) or around (ulnar nerve) the carpal tunnel.
The ulnar nerve lies more deeply on the ulnar side of forearm and wrist flanking the ulnar artery on the surface
of the deep long flexor muscle (flexor digitorum profundus). Clearly both nerves were at risk from the cut
illustrated. The superficial terminal branch of the radial nerve, by contrast, is at this stage a much less
important nerve, with no motor fibres. It runs to the back of the hand and fingers along the radial side of the
forearm, supplying sensation to the dorsum of hand and only the backs of the radial three digits for a short way
along their length. The ulnar nerve gives a dorsal sensory branch to supply the other one and a half or two
ulnar digits. If you extend your thumb and tense the tendon of extensor pollicis longus you may be able to
feel the terminal branch of the radial nerve crossing the snuff box superficial to the taut tendon by running your
finger along the tendon. The radial nerve is thus unlikely to have been at risk.
Testing for damage to the other two nerves is usually easy and rapid with a cooperative patient.
Median nerve
The pulp of the index finger is virtually always supplied by the median nerve. Can the patient feel you touch
here (with a blunt pin, or wool, or your own finger)?
The pulp of the little finger similarly is supplied by the ulnar nerve, so repeat the process there to check for ulnar
nerve damage.
To confirm your suspicions, now check the motor functions — the median nerve first. In checking for motor
paralysis due to nerve injury, think of the muscles innervated by the nerve distal to the injury, find an action
which is performed by one muscle only, check that action, and if possible, see and feel the responsible muscle
contracting.
For median nerve, abductor pollicis brevis (APB), the short abductor of the thumb, is virtually always
supplied by the median nerve just after entering the palm. You test its action by asking the patient to move the
thumb directly upwards, with the palm flat, away from the palm and the other fingers, keeping the thumb inside
the margin of the index finger so the thumb pushes straight up against resistance.
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That movement is palmar abduction. Only APB can perform it, you can test the power and you can see and
feel the muscle contract. The branch to the muscle is given off immediately after the median nerve enters the
palm after passing under the flexor retinaculum. In patients with longstanding carpal tunnel syndrome with
median nerve compression affecting the motor fibres as they go through the tunnel the muscle may waste and
atrophy as illustrated elsewhere in the book. But don't of course expect wasting, or the deformities arising from
such wasting, in an acute injury.
The ulnar nerve has a much greater effect on the motor function of the hand than does the median — it
supplies at least a dozen important small muscles, compared to the handful from median (conversely the
sensory loss from median nerve injury is much more significant than from ulnar nerve damage).
Use two tests here — they will help remind you of the muscles involved.
•
Can the patient abduct the little finger away from the other fingers against resistance? This is done by
•
Can the patient hold a piece of paper between outstretched fingers? This is done by the interossei, all
abductor digiti minimi, supplied by ulnar nerve by its deep palmar branch.
supplied by the ulnar nerve.
There are many other tests for other muscles supplied by the ulnar nerve — pinch test for adductorpollicis
(Froment sign), the deficiencies seen in opposition (Sunderland sign), and so on — but further tests are not
needed, having already made the diagnosis of an injured ulnar nerve at wrist level or above, corresponding to
the site of the cut.
In cooperative patients, this is easy and conclusive — but supposing the patient was drunk and uncooperative,
or stuporous, or a young child, and cannot or will not cooperate with you.
In this case you can still diagnose a nerve injury from effects on the sympathetic efferent fibres. If the nerve
carrying them is cut, they too will be paralysed, and the affected skin in the distribution of the nerve will be dry
and unable to sweat. This can be demonstrated elegantly by sprinkling a starch powder over the skin and
observing the colour change. Also check if any differences can be seen or felt distal to the cut compared to the
other hand — a small point but sometimes quite helpful.
Next check for damage to the next important group of structures — the long tendons to
the thumb and fingers and the tendons to the wrist. These lie in three layers from superficial to deep.
•
The wrist flexors:
~ Flexor carpi radialis — the largest and most visible tendon
~ Flexor carpi ulnaris — the most ulnar sided
~ The inconstant palmaris longus between them.
You can check these by asking the patient to flex his wrist. If he can do so. he may of course be using deeper
finger flexors, which because they cross multiple joints, can act as accessory flexors of the wrist. In this
instance no wrist flexion is possible.
•
The superficial and deep long flexor tendons to thumb and fingers. Flexor digitorum superficialis (FDS) and
profundus (FDP), each with four tendons, and the solitary tendon of flexor pollicis longus (FPL).
~ FDS — This group of four tendons to index, middle, ring and little fingers flexes the proximal
interphalangeal joints. It is difficult to test their independent action becauseof the last and deepest layer
— flexor digitorum profundus; these can act as accessory flexors of the more proximal joints, which
they also cross to reach the end of the digit The deepest tendons are prime movers of the most distal
joints of thumb and fingers.
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~ FDP and FPL — Test the abilities to flex the end joints of the digits first — thumb index through to little finger. In this
patient, no spontaneous movement against resistance is possible — all of these deep tendons have been severed.
Clearly given this finding, it is very likely that the more superficially placed flexor digitorum superficialis tendons
have been also severed, and you will find this confirmed when you test the ability of the patient to flex the proximal
interphalangeal joint (which in the absence of action of FDP is left as the only muscle which can flex the joint).
Identifying damage to the flexor digitorum superficialis in the finger is easy in this patient with a cut wrist, because the
flexor digitorum profundus is also cut and cannot confuse things by itself acting as a flexor of the proximal IP joint.
But what if the FDP is not damaged? How can the action of flexor digitorum superficialis on the PIP joint be checked in
such circumstances if the sole injury is to FDS?
Answer: To test the action of the superficial finger flexors in the presence of intact deep flexors is a difficult task and
needs a knowledge of the anatomical arrangements of the muscles, and in particular, the deep layer of flexor digitorum
profundus. Note that with fingers extended, it is possible to flex the index finger at its end joint independent of other
fingers, just as with the end joint of the thumb. But to flex the end joint of the middle, ring or little finger alone is rather
difficult — the end joints of adjacent fingers tend also to flex, unless concentrating or holding them down. This is
because, of the four separate tendons of FDP in relation to the muscle, the one to the index finger is virtually a
separate muscle (flexor indicis), whereas the other tendons are communally joined until just above the wrist
This fact can be used to advantage to eliminate the influence of the deeper tendons of FDP to these three fingers on
the proximal joint as follows — try this trick.
Hold down flat all fingers but one of a colleague, then ask them to flex the remaining finger at the proximal IP joint to a
right angle as illustrated. By restraining the long tendons of FDP to the other fingers, and preventing their movement,
you have very effectively inactivated the remaining FDP tendon to the middle finger. You can easily check that FDP is
not having any effect by flicking the terminal phalanx with your finger — note that the distal IP joint is freely floppy and
the only muscle now causing flexion of the PIP joint is FDS.
CONDITION 050. FIGURE 2. Testing for
function of FDS alone
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An injury to the long flexor tendons should have already been suspected in this patient on inspection alone. In the
normal hand at rest, the fingers and thumb are progressively flexed into the palm from index to little finger with the
thumb at right angles as illustrated. This is the position of rest of the hand with a balanced postural tone of flexors and
extensors. In your patient (a trained role player) the fingers are extended instead of curled and the thumb is also
extended, and the whole hand looks very unnatural; because the imbalance caused by the unopposed natural resting
tension of the finger extensors, with all the long flexors cut, has distorted the normal position of rest.
CONDITION 050. FIGURE 3.
CONDITION 050. FIGURE 4.
Figures 3 and 4 show position of rest from palmar and radial aspects
CONDITION 050. FIGURE 5.
Note position of fingers and thumb after
long tendon injury
The inabilities to move the terminal two joints of the fingers and the terminal jointot the thumb are not, and could not be, due
to the injury to the median or ulnar nerves
The branches to the extrinsic long flexors come off from much higher in the forearm and are unaffected by nerve injury
at the wrist, which can only affect the function of intrinsic muscles in the hand. These effects on the terminal joints are
due to tendon injuries.
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Moving proximally, also note that he cannot flex the metacarpophalangeal joints of the fingers (or of the
thumb). This action in the fingers is done by the lumbricals, supplied by branches from median and ulnar
nerves in the palm, and this inability is due to the nerve damage, as are all the other tests for intrinsic muscle
function testing thenar and hypothenar muscles and interossei apart from those we have already done. These
additional tests also give characteristic signs: on attempted ulnar adduction, pinch test of the thumb (Froment
sign) and failure of opposition of little finger (Sunderland sign). These latter signs are accentuated and even
more obvious in patients with longstanding effects of muscle wasting, which need not concern us further in
this patient.
The most superficial muscles are the wrist flexors FCR and FCU and PL. The patient cannot flex the wrist
actively either because all of these are divided as well (plus the long finger and thumb flexors which can of
course act as accessory flexors of the wrist as well as prime movers of their respective finger or thumb joints).
Finally the blood vessels — the very superficial radial artery and more deeply placed ulnar artery. These are
very likely both to have been cut but vascular spasm and compression may have caused bleeding to stop.
Examine the colour of the fingers and test capillary refilling after pressure, but the anastomoses and collateral
circulation across the wrist are very efficient and it is very unlikely that the hand will be grossly ischaemic even
if both arteries have been divided.
The final diagnosis, after checking that sensation to the back of the hand and proximal back of fingers is intact,
confirming that radial nerve and dorsal branch of ulnar nerve have escaped injury, is:
Severe deep knife wound of wrist severing all volar long flexor tendons to wrist and hand and severing median
and ulnar nerves — a very severe injury requiring early reconstructive surgery. Fortunately this is a 'tidy' wound
without major contamination and there is no contraindication to primary repair.
Treatment will necessarily require a subsequent intensive rehabilitation programme of initial rest, with early
mobilisation and supportive physiotherapy over many months. The final functional outcome will be very much
influenced by his occupation — if he is a concert pianist, thoughts about vocational retraining should start early.
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Condition 051
Multiple skin lesions in a Queensland family
AIMS OF STATION
To assess the candidate's ability to diagnose a variety of common benign and 'suspicious' skin
lesions and to advise on management.
EXAMINER INSTRUCTIONS
A careful history of how long the lesions had been present would normally be required; this
scenario focuses on pattern recognition from physical appearance.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The farmer is very concerned about six members of the family and has photographs of each of
the lesions. He has come in from his farm, which is a long way from the town.
The photographs demonstrate:
•
Figure 1. His son has a lesion suspicious of squamous cell carcinoma (SCC) of the lip.
•
Figure 2. His 50-year-old brother has a lesion suspicious of basal cell carcinoma (BCC)
•
Figure 3. His father has a seborrhoeic keratosis on his face, which is benign.
•
Figure 4. His wife has a lesion suspicious of malignant melanoma of the leg.
of the neck.
•
Figure 5. His 52-year-old brother has a benign spider naevus of the chest.
•
Figure 6. His daughter has a lesion suggestive of a benign melanocytic dermal naevus
of the face.
The SCC, BCC and melanoma, assuming diagnosis is confirmed by excision, are malignant
The seborrhoeic keratosis, the spider naevus and the melanocytic dermal naevus are benign
and probably require just reassurance.
His wife, who has the malignant melanoma, requires the most urgent treatment. The excision of
her lesion should not be delayed, even though she would prefer to delay treatment for several
months because they are busy on the farm.
The SCC and the BCC should also be removed without excessive delay.
The BCC only spreads directly, but local infiltration may be extensive, although this occurs
slowly. The SCC spreads directly and mainly by lymphatics, and occasionally by blood spread.
Malignant melanoma is the most serious of the lesions and spreads locally, by lymphatics and
by blood spread. Widespread metastases can occur even from a small lesion. The risk of
spread is proportional to the depth of the melanoma seen on microscopic examination. The
prognosis is favourable if the depth is less than 0.75 mm.
KEY ISSUES
•
The candidate should indicate which lesions are likely to be benign (seborrhoeic keratosis,
melanocytic dermal naevus and spider naevus) and do not have to be excised; and which
are suspicious of malignancy (SCC, BCC and melanoma) and should be excised.
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CRITICAL ERROR
• Failure to suspect that the wife's lesion is a malignant melanoma, and that surgical excision should occur
without delay.
COMMENTARY
This scenario illustrates six of the most common focal cutaneous lesions seen in the Australian population
(benign melanocytic naevus, seborrhoeic keratosis, spider naevus, basal cell cancer, squamous ceil cancer,
malignant melanoma). Clearly benign, longstanding lesions are the most commonly seen pigmented skin
'moles'; and most can be confidently diagnosed.
Benign skin lesions:
Benign melanocytic naevi (intradermal, junctional and compound)
These are classified according to the site of the benign pigment-containing melanocytes. Junctional naevi have
melanocytes at the junction of epidermis and dermis, they are flatter than the other more mature naevi and may
be wholly macular.
Intradermal and compound naevi have melanocytes intradermally, or at both epidermal and dermal levels.
Macroscopically they vary from a light or dark brown nodule (often containing hair, a helpful diagnostic point —
hairy moles are almost invariably benign).
CONDITION 051. FIGURE 7.
CONDITION 051. FIGURE 8.
Benign melanocytic naevus
Benign melanocytic naevus of neck
Seborrhoeic keratoses ('seborrhoeic warts')
These lesions arise from the epidermis as the result of proliferation of keratinocytes. They are often multiple.
There is no dermal involvement and the keratoses are so superficial that they are often said to have a 'painted
on' appearance. Seborrhoeic keratoses occur in older people and are most often found on the trunk, although
they may be found on the face and scalp. The lesions are raised or flat and plaque-like, with a waxy texture.
Haemosiderin deposition in the plaques may produce a brownish-black colour. Occasionally the lesion may be
situated on a part of the body that makes it prone to trauma, but the only real reason for excision of a
seborrhoeic keratosis is for cosmetic purposes. They are quite benign and their fissured, variegated, rough
textured appearance usually allows confident diagnosis.
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CONDITION 051. FIGURE 9.
CONDITION 051. FIGURE 10.
Multiple seborrhoeic keratoses of trunk
Seborrhoeic keratoses of back
Spider naevi
These small lesions have a red central spot surrounded by flaring telangiectases. Pressure on the central
arteriole causes blanching. Multiple ones on the upper trunk, upper limbs, or face can be stigmata of
alcoholic liver disease.
Papillomas
Otherwise known as skin tags, papillomas may be found at any site and are either sessile or pedunculated
overgrowths of skin seen frequently around flexural areas of axilla or groin. They may be excised for cosmetic
reasons.
Pyogenic granulomas
These lesions may arise in response to minor trauma. At the site of puncture of the skin there is a mass of
rapidly growing granulation tissue which characteristically forms an exophytic growth. This may appear over
a few weeks and bleeds easily on contact. Treatment is by excision and curettage of the area underlying the
granuloma.
CONDITION 051. FIGURE 11.
CONDITION 051. FIGURE 12.
Pyogenic granuloma of palm
Pyogenic granuloma of finger
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Verrucae
Verrucae are most commonly seen in children and are caused by viruses. Common sites are
hands and soles of feet. The lesions may spread to adjacent sites or other individuals. They
consist of raised and rounded keratinised projections above the skin surface. Those on the sole
are commonly 'endophytic' due to weight-bearing. Histologically there is hyperplasia of the
epidermis and increased keratinisation. Treatment can be difficult, as the verruca is likely to return
if the virus is not completely eradicated. As many verrucae will completely regress, if the lesions
are asymptomatic, they are better left alone. Those warts that occur around the genital and
perineal regions are known as condyloma acuminata. They are caused by the human papilloma
virus and spread by sexual contact.
Keratoacanthomas
These lesions are characterised by rapid growth, a macroscopic appearance resembling a
squamous cell carcinoma and spontaneous regression. A keratoacanthoma usually occurs on the
face (often on the nose or ear) or hand and appears over the course of a few weeks. The centre of
the lesion ulcerates and may contain a plug of keratin. Histologically these lesions can resemble
squamous cell carcinoma, but are identified by a central core of proliferating cells extending down
into the dermis. The site of the tumour and its rapid development should make the diagnosis.
Keratoacanthomas should be excised and sent for histologic examination to exclude squamous
cell carcinoma. Accurate histologic diagnosis is usually possible if the whole lesion is provided;
only a small margin of excision is required.
CONDITION 051. FIGURE 13.
Keratoacanthoma of face
Fibrohistiocytic tumours: dermatofibroma, xanthoma
There is a considerable histological range of soft tissue tumours and the two benign lesions that
may be considered of true skin origin are the cutaneous fibrous histiocytoma (dermatofibroma)
and the xanthoma. A dermatofibroma is a relatively common skin nodule and typically occurs on
the legs of young or middle-aged women.
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CONDITION 051. FIGURE 14.
Dermatofibroma of leg
The lesions are usually raised from the skin surface and about 1 cm in diameter. Most are
asymptomatic but they can be itchy and tender which is the usual reason for excision.
Xanthomas occur when an area of skin becomes infiltrated by lipid-filled macrophages or
histiocytes. They may occur at any site on the body and the most common form is the
xanthelasma. These soft, yellow plaques are characteristically found at the inner canthus of the
palpebral fissure.
Appendage tumours
Cylindromas (arising from sweat gland cells) and other skin appendage tumours are rare.
Treatment is excision, to confirm the diagnosis.
Premalignant neoplasms of skin:
Actinic keratoses
Actinic (solar) keratoses are the result of solar damage and are characteristically found on
areas of the body most at risk of prolonged sun exposure. The back of the hand is a common
site. The lesions occur most frequently in older people and those who work outdoors. Fair
skinned people living in the tropics and subtropics are most at risk. The actinic keratosis
represents a gradual dysplastic change in the epidermis and underlying dermis. There is a
build-up of excessive keratin in the epidermis and elastosis in the dermis. Actinic keratoses
appear as scaly lesions with hyperaemic bases that bleed easily with trauma. They can be
treated by cryotherapy, application of a cytotoxic cream or excision. Left untreated, 15-20% of
actinic keratoses will progress to squamous cell carcinoma.
CONDITION 051. FIGURE 15. Multiple
actinic keratoses of hands
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Bowen disease
This is an unusual condition and presents as a scaly red plaque with clearly defined margins. The surface is
keratotic and often crusted and fissured. The lesion is not related to solar damage and in some instances
arsenicals have been implicated in the aetiology Bowen disease may occur on any part of the body and is a
premalignant condition and represents squamous cell carcinoma in-situ. There is hyperplasia of the
epidermis, atypical epithelial cells are present and infiltration of this layer with pleomorphic malpighian and
giant cells. Treatment is with cryotherapy or cytotoxic creams. Larger lesions and those that are suspicious
or frankly malignant are best treated by excision. Skin grafting may be required.
Malignant skin neoplasms
7 49333535
CONDITION 051. FIGURE
16. Bowen disease of skin
The skin is the largest organ of the human body and not surprisingly it is the most common site of tumours.
Skin cancer is the most common malignancy in fair-skinned people. Tumours can arise from any of the skin
structures — epidermis, dermis, connective tissue, glands, and muscle or nerve elements. Although not all
skin tumours are neoplastic, from a management perspective, the suspicion of malignancy must always be
uppermost in the clinician's mind when dealing with a skin tumour, be it pigmented or not.
Malignant skin lesions are very common in Australia with a susceptible population and
excessive solar exposure. By contrast, melanoma and other skin malignancies are
uncommon in indigenous Aboriginal peoples.
Basal cell carcinomas (BCC)
This is the most common type of skin cancer and is almost totally confined to fair skinned people. Basal cell
carcinomas are rare in Asiatic peoples and almost never occur in dark skinned people. They tend to occur in
people over the age of 40 and are usually found on areas of the body subject to chronic exposure to the
sun, particularly the face. Characteristically these tumours are found on the face above an imaginary line
running from the corner of the mouth to the ear.
The tumours are slow-growing and may take years to get to sufficient size to bother the patient. Left
untreated, a basal cell carcinoma will spread relentlessly and destroy all the surrounding tissues without
ever metastasising. The tumour characteristically has a raised, rolled edge which often takes on a pearly
appearance. Most basal cell carcinomas are the same colour as the adjacent skin, but some are heavily
pigmented and mistaken for
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melanomas. There may be central regression of the tumour with ulceration, producing the so-called 'rodent
ulcer.' Other morphological patterns of basal cell carcinomas include those resembling Bowen disease with a
thin pink plaque (erythematous basal cell carcinoma) and those known as sclerosing tumours with white
plaque and a fine pearly edge (morphoea carcinoma). The erythematous variety of basal cell carcinoma tends
to occur on the trunk.
Apart from nodular BCC (the most common presentation), ulcerative, sclerosing/cicatrising ('brush-fire'),
cystic, psoriatiform, comedoform and pigmented variations are commonly seen.
CONDITION 051. FIGURES 17 AND 18.
Morphoeic BCC
Ulcerative BCC
CONDITION 051. FIGURES 19 AND 20. Sclerosing BCC
behind ear Pigmented BCC
Small basal cell carcinoma can be treated by cryotherapy, topical chemotherapy or radiotherapy.
Radiotherapy is used for cancers in areas where surgical resection would be difficult and risk damage to
surrounding structures, such as tear ducts and eyelids. Radiotherapy should not be used for lesions adjacent
to cartilage, which might undergo radionecrosis. The major disadvantage of these types of treatment is that no
tissue is obtained for histological analysis.
The optimum treatment for basal cell carcinomas — and particularly for lesions greater than 1 cm diameter — is
surgical excision. A margin of at least 1 mm of normal tissue is required. To minimise tissue loss, particularly
for lesions on the face, a technique of serial slicing can be employed. Whilst this is time-consuming, the serial
excision and immediate microscopic examination of the resected tissue will allow an intraoperative
assessment of clearance of tumour in depth and width. Larger basal cell carcinomas will require skin grafting a
reconstructive surgery.
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Squamous cell carcinomas (SCC)
These are the second most common cancer of the skin. Whilst basal cell carcinomas arise from
the basal layers, squamous cell carcinomas arise from the keratinocytes of the epidermis.
Sunlight is an important aetiological factor and solar keratoses and Bowen disease are
precursors. Squamous cell cancers can also occur in scars or chronic ulcers (Marjolin ulcer).
Most squamous cell carcinomas occur in the fair skinned people, but these tumours are also
found in darker-skinned people, particularly in depigmented skin following scarring. These
cancers are usually seen in the older population, but with excessive sun exposure in childhood,
squamous cell carcinoma is also a disease of young adults. As most of the tumours are sun
exposure-related, they tend to occur on exposed parts of the body, particularly the head and the
hands and on the lips, invariably involve the lower lip.
On the ears, squamous cell cancers occur particularly on the outer helix, in contrast to BCC
which occur in the retroareolar sulcus.
CONDITION 051. FIGURE 21.
CONDITION 051. FIGURE 22.
Squamous cell carcinoma of lip
SCC of ear
Squamous cell carcinoma has a variable natural history. Those tumours that arise from actinic
keratoses can be quite slow growing, while those that complicate Bowen disease tend to be more
aggressive. Whilst a squamous cell carcinoma can morphologically resemble a basal cell
carcinoma, the crucial difference is the ability of the former to metastasise.
Optimal treatment of squamous cell carcinoma of the skin is surgical excision. Although the
tumours do metastasise to lymph nodes there is no evidence that prophylactic lymph node
dissection confers any benefit. For those patients who undergo a curative resection, the
prognosis is good, with a 95% 5-year survival rate.
Malignant melanomas
The most malignant of all skin tumours, more common in exposed skin, occurring throughout
adult life, particularly prevalent in fair-skinned populations of tropical climates, but incidence is
increasing in most countries.
Any brown or black mole showing an increase in size, irritation, bleeding, nodularity or ulceration
should be regarded as suspect and should be excised with an adequate margin
Spread to regional nodes is common and markedly worsens prognosis. Bloodborne metastases
to lungs, liver, brain and small bowel are common.
Prognosis worsens with increasing depth of invasion. Several macroscopic types are recognised
with progressively worsening prognosis.
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CONDITION 051. FIGURES 23-25
•
Hutchinson melanotic freckle (lentigo maligna melanoma)
•
Superficial spreading melanoma (most common type)
•
Nodular melanoma
• Nonpigmented amelanotic melanoma.
Kaposi sarcoma
Classical Kaposi sarcoma is found in elderly males of Mediterranean or East European origin
and tends to run an indolent course. The disease associated with AIDS and other acquired
immunodeficiency states runs a more aggressive course. Kaposi sarcoma is a spindle cell
tumour and is characteristically a multicentric angiomatous lesion of the skin. The lesions vary in
appearance from nodule or macule to plaque and may be several centimetres in diameter. In its
aggressive form the body may be covered in confluent, violaceous skin nodules.
CONDITION 051. FIGURE 26.
Kaposi sarcoma
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Visceral involvement is uncommon with the classical form of Kaposi sarcoma, but gastrointestinal
and pulmonary disease often occurs in AIDS-related Kaposi tumour. Localised cutaneous lesions
can be treated with radiotherapy, cryotherapy, intralesional chemotherapy or topical retinoids.
Other primary cutaneous tumours
Malignant histiocytoma (dermatofibrosarcoma protuberans) is a lesion with a tendency to
biphasic growth spurts and local recurrence after excision.
CONDITION 051. FIGURE 27.
Malignant histiocytoma
There are numerous other uncommon primary cutaneous tumours, but only three need to be
considered because of their similarity to basal cell carcinoma. The three are Merkel cell
carcinoma, microcystic adnexal carcinoma and sebaceous gland carcinoma Merkel cell
carcinoma is of neuroendocrine origin and is an aggressive tumour with a high rate of local
recurrence. It may resemble a basal cell carcinoma, both in its appearance and preferential
distribution on the head and neck.
The other two tumours are rare, slow growing and prone to local recurrence if not adequately
excised.
Secondary tumours
The skin is a common site of metastatic deposits, particular for aerodigestive tract neoplasms. In
most instances the skin deposits will only become manifest after the primary disease has been
diagnosed or treated. Occasionally, a cutaneous metastasis may be the presenting feature of an
otherwise asymptomatic tumour of the lung or oesophagus.
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Condition 052
Subcutaneous swelling for assessment
AIMS OF STATION
To assess the candidate's ability to perform an appropriately focused diagnostic examination of a
subcutaneous lump.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
The case scenario is a real patient with a longstanding subcutaneous swelling — the findings and
diagnosis are to be checked by the examiner personally prior to commencement of the
examination.
The lump will usually be a lipoma, sebaceous cyst, ganglion or bursa, or occasionally a less
common diagnosis.
Real patients should just answer questions as asked and will expect to be reassured about
conservative treatment being offered, or note advice about possible surgery.
Opening statement:
'What is this lump?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
Major points of technique and accuracy in examination are
• Establishing the lump's physical characteristics — particularly contour and consistency.
• 'Layering' the lump — is it in subcutaneous fat, attached to or beneath deep fascia, and if the
latter is it arising from muscle, tendon, ligament, bone, nerve or blood vessels?
• Does the lump pulsate and is this intrinsic or transmitted pulsation?
• What are its attachments? Superficially is it attached to the skin and deeply what are the
effects of tensing or contracting underlying muscles or tendons.
• Is it a fluid-filled cystic lump? The most helpful test here will be whether it is transilluminable, a
test often inadequately performed. This test must be performed properly by correct torch
placement behind the lump and must be done by suitably darkening the surrounds — turning
off lights and covering with sheet or blanket as required. When brilliantly positive, it gives
irrefutable evidence of contents being liquid or gas. Gas cysts do occur in lung, neck and
bowel; but in a subcutaneous site, the fluid will almost always be a liquid, and usually a clear
serous liquid (such as in scrotal cystic swellings, bursae and tendon sheath swellings, or
branchial cysts) rather than pultaceous material or blood. A negative transillumination sign
does not of course exclude a fluid collection as the cyst may contain a complex and viscous
fluid, or may have a thick lining.
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Candidates should familiarise themselves with the normal extent of transilluminability of other
tissues, which vary rather like the scale of sonicity characteristics of an ultrasound. Try
illuminating the finger and areas of normal skin to see the extent of normal transillumination of fat
and other tissues. Lipomas are not transilluminably separate from surrounding fatty tissues, nor
are most sebaceous' cysts transilluminable, because the content is viscous or pultaceous
keratin.
• Testing for fluctuation is often poorly performed also. The lump must be capable of being fixed
by two fingers at the perimeter while a third finger compresses it centrally. If the other fingers
are displaced and expanded symmetrically, and if this occurs when tested in several
directions and in planes at right angles to each other, then this again is irrefutable evidence of
contained liquid (by virtue of the incompressibility of liquids which causes transmission of
outside pressure in all directions). Lipomas and other soft compressible solids may give an
impression of fluctuance, but they do not exhibit true fluctuation, merely effects of deformation.
• Ultrasound confirmation and positive yield of liquid on needle aspiration are definitively
diagnostic of a cystic collection. In deeper lumps, such as those in breast or thyroid, where
neither transillumination nor fluctuation is relevant or possible, these techniques become the
best diagnostic aids.
• Is the lump vascular? Candidates should not omit feeling for vascular pulsation, or a
transmitted venous impulse, or listening for a vascular bruit or hum. Remembering normal
vascular surface anatomy makes egregious errors less likely — such as missing an aneurysm.
• Does the lump show emptying and refilling after compression or with joint movements? This
important sign should alert the clinician to a possible bursal communication with an underlying
joint and candidates should know which bursae are likely to communicate with which joints.
Test your knowledge of the prepatellar bursa, the suprapatellar bursa, the pretibial bursa, the
anserine bursa, the semimembranous bursa and a Baker cyst: all are near the knee joint, but
only some communicate with (or are part of) the joint synovium.
• Is the lump attached to the skin? If this sign is unequivocally positive, the lump is very likely to
be a 'sebaceous' cyst or one of its variants, like a pilomatrixoma ('calcifying epithelioma of
Malherbe'). This sign is sometimes easy to elicit and is accompanied by obvious skin dimpling
or a punctum. But often, in areas where the skin is thick and relatively fixed to deeper layers
such as on the back of neck or scalp, the test is equivocal and the clinician must rely on other
findings such as contour and consistency to help diagnose subcutaneous lumps, and to
differentiate between lipomas and keratinous 'sebaceous' cysts.
At the end of the candidate's examination, or after five minutes, the examiner will:
ASK — 'What is your diagnosis?'
ASK — 'I s there any significant risk of malignant change?'JUe answer is NO for lipomas,
sebaceous cysts, ganglia and bursae.
ASK — 'I s there any significant risk of infection?' The answer is YES for infection
complicating bursae and sebaceous cysts, but not lipomas or ganglia. ADVISE the candidate
'please counsel your patient about the lump. '
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KEY ISSUES
The candidate should be able to:
•
Perform an appropriately focused and accurate physical examination of the subcutaneous
lump. An appropriate and optimal examination will determine in which tissue layer the lump
lies, its physical shape, size, contour and consistency, and its relationship to adjacent
anatomical structures such as skin, muscle and tendons, joints, vessels and nerves. Testing
for skin and deeper attachments and for fluctuation and transillumination, where appropriate,
will be observed for technique and accuracy.
•
Display appropriate reasoning skills in making the correct diagnosis:
~ Most lipomas, sebaceous cysts, ganglia and bursae will not be difficult to diagnose.
Distinction between sebaceous cysts and lipomas may be easy and aided by diagnostic
clues, such as an obvious punctum. and knowledgeable candidates will recognise the
differences and the potential risks of infective complications of sebaceous cysts and
bursae.
~ Knowledgeable candidates will be able to make a confident diagnosis and to counsel the
patient briefly but appropriately. The station is however predominantly to serve as a test of
technique and accuracy of physical examination, and of appropriate clinical reasoning
skills.
CRITICAL ERRORS
•
Very unsatisfactory examination technique.
•
Major errors in accuracy of findings.
COMMENTARY
The most common subcutaneous swelling is a lipoma. Sebaceous (epidermoid) cysts, bursae
and ganglia are also common.
Subcutaneous lipomas (Figures 1 and 2) are slow growing, soft, painless, tabulated and mobile
swellings beneath the skin.
CONDITION 052. FIGURE 1.
CONDITION 052. FIGURE 2.
Subcutaneous lipoma of back
Subcutaneous lipoma under arm
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Epidermoid Cyst (keratinous cyst, implantation dermoid cyst, pilosebaceous
follicle cyst, 'sebaceous cyst')
Epidermal (epidermoid) cysts are common. They can occur at any age and at any site although
they tend to be seen in older people and most often on the face, scalp or trunk. They have several
different causes. Some are inclusion or implantation cysts, traumatic in origin, and others result
from the occlusion of the pilosebaceous unit. Traumatic implantation cysts tend to occur on the
hands and fingers. Others will be found at the site of surgical scars. Some epidermoid cysts are
associated with hereditary syndromes (e.g. Gardner syndrome). The cyst is lined with squamous
epithelium and full of desquamated debris, which has a characteristic soft cheesy texture and
offensive odour when infected (Cock peculiar tumour). These cysts are often and mistakenly
called 'sebaceous' cysts. A true sebaceous cyst is rare and arises from a sebaceous gland. A
keratinous cyst is a preferable term.
CONDITION 052. FIGURE 3.
'Sebaceous' cyst with punctum
CONDITION 052. FIGURE 4.
An epidermoid cyst tends to be elevated and many, but not all, will have a central punctum.
These cysts may discharge or become infected. Uncomplicated cysts may be enucleated,
whereas an infected cyst should be incised and drained, with later excision.
CONDITION 052. FIGURE 5.
Multiple 'sebaceous' cysts of scrotum
CONDITION 052. FIGURE 6. Large
'sebaceous' cyst of scalp
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'Sebaceous' cysts (Figures 3, 4, 5 and 6) move with and not separate from the skin. They occur
within any area of hair-bearing skin. They are usually round, fluctuant and non-transilluminable
with a smooth nonlobulated contour which differentiates them from lipomas. The other
differentiations (skin attachment versus the subcuticular mobility of lipomas) are not always easy
signs to detect in areas of thick skin like the back of the neck - but 'sebaceous' cysts always have
a focal point of skin fixation with or without a punctum, and have a round non-lobulated contour.
Dermoid cyst (congenital inclusion cyst, hamartomatous cyst)
Dermoid cysts can be found as cystic tumours of the ovary or within the cranium and spine and for
the purposes of this section, in subcutaneous tissues. Apart from the confusing use of this term,
the dermoid cyst is a congenital lesion and those found in the skin and subcutaneous layer
usually occur on the face, neck or scalp. They are thin-walled cysts and contain fatty material and
occasionally, hair. Although these cysts can appear at any age, those on the face and neck are
usually evident at birth. Those on the face occur mainly around the eyes and are often attached to
the underlying periosteum. They may also be found in the mouth and upper neck. Dermoid cysts
are true hamartomas and develop when skin and skin structures become trapped during
embryonic development, such as at lines of fusion anteriorly in the midline and around the eyes in
the head and neck. Treatment is by excision. Imaging may be necessary, to assess the degree of
involvement of underlying structures.
Ganglia (Figures 7, 8 and 9) present as deeply placed subcutaneous lumps around joints or
tendon sheaths. They may be made more prominent by tendon contraction or tensing and on joint
movement. These are helpful diagnostic tests in the optimal examination sequence of: Look,
Move, Feel, Listen. The common ganglia — those around wrist or ankle — do not communicate
with the adjacent joints. They are, however, often formed by cystic degenerative change in the
fibrous joint capsule or fibrous tendon sheath, so their removal necessitates opening the joint or
sheath.
CONDITION 052. FIGURE 7.
Ganglion of lateral aspect of foot
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CONDITION 052. FIGURES 8 AND 9. Ganglion
of wrist — the most common site
Bursae are cystic sacs between the skin and underlying bony prominences or they separate and
aid gliding of adjacent tendons and ligaments. Some bursae communicate with joints or tendon
sheaths.
CONDITION 052. FIGURE 10.
CONDITION 052. FIGURE 11.
Olecranon Bursitis
Double pathology — 'sebaceous' cyst of
neck with submandibular salivary gland
swelling behind it
Candidates should show appropriate perspective in counselling. Many or most of these lumps
require no active treatment other than reassurance.
Subcutaneous lumps are very common and typical examples as indicated in the figures. Knowing
that the lump has been present for a long time without significant symptoms or change in
character is reassuring and makes a benign condition most likely.
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Condition 053
Examination of the knee of a patient with recurrent painful
swelling after injury
AIMS OF STATION
To assess the candidate's technique of physical examination of the knee joint and the accuracy of examination.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
Opening statement:
'What is wrong with my knee?'
You have a history of twisting your right knee six months ago when you caught your foot on a piece of broken
pavement. You fell on the right knee which became swollen and painful on the inner side of the knee. The
swelling caused a painful limp for a few days then subsided.
Since then you have had intermittent attacks of pain felt on the inner side of the right knee with swelling which
settles within 24 hours. You have difficulty in straightening your right leg fully and occasionally have
apprehension twisting to the right.
You are otherwise well and between attacks can walk normally with only a minor feeling of pain on the inner side
of your knee.
•
You should complain of tenderness at the inner joint line anteriorly when the right knee is examined.
•
You cannot fully straighten the affected knee because of pain (a deficit of around 15 of extension).
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should examine both knees:
Expected technique of knee examination:
•
Checks stance and gait.
•
Checks active range of movement initially — flexion/extension (range/power) notes positive signs of inability
to fully extend affected knee and medial joint tenderness
•
Checks passive range of movement with care, ensuring that the range of active movement is not exceeded.
•
Checks for tenderness at joint line and around margins over sites of attachments of collateral ligaments and
patellar ligament Should identify tenderness anteriorly, at the joint line, on the inner aspect of the right knee.
•
Checks for joint effusion (patellar tap' and 'bulge test' for cross fluctuation).
•
Checks patellofemoral mobility and tracking
•
Checks integrity of ligaments appropriately: valgus and varus strain to slightly flexed joint for collaterals;
anterior and posterior glide (drawer) test for cruciates — all of these
are normal
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•
Checks quadriceps for strength and wasting
•
Compares symptomatic side with normal side.
•
Examines back of joint (popliteal fossa) as well as front and sides.
Diagnosis/Differential Diagnosis
•
Probable injury to medial intra-articular meniscus (medial cartilage)
•
Alternative: traumatic osteochondritis/synovitis right knee.
•
Unacceptable: cruciate/collateral ligament rupture.
KEY ISSUES
•
Perform a focused and accurate physical examination of the knee joints (physical examination skills).
•
Formulate a diagnostic/differential diagnosis plan appropriate to the clinical problem (clinical reasoning
skills).
CRITICAL ERRORS
•
Failure to test movements of the left knee to compare with the other (affected) side.
•
Failure to test ligament integrity.
COMMENTARY
The knee joint is the most complex synovial joint in the body. Traumatic soft tissue internal derangements of
the knee (IDK) are common after domestic, recreational and sporting injuries giving:
• injuries to the intra-articular cartilages (more commonly to the medial meniscus);
• tears of the collateral ligaments from valgus or varus strains;
• cruciate ligament tears;
• traumatic synovitis; and
• chondromalacia or osteochondritis dissecans.
Candidates should not omit examining the back of the affected knee. Occasionally candidates may mistakenly
examine the normal knee instead of the affected one after asking the patient to turn over — a moderately
serious mistake induced by nervousness and lack of concentration.
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Condition 054
Assessment of hearing loss, first noted during pregnancy, in a 35-year-old
woman
AIMS OF STATION
To assess the candidate's knowledge of types of hearing loss and their differentiation on examination.
EXAMINER INSTRUCTIONS
Opening statement:
'What is wrong with my hearing?'
The examiner will have instructed the patient as follows:
•
you gave birth to your first child a month ago;
•
about midway during the pregnancy you became aware of reduced hearing;
•
this has become progressively worse and is the reason for you consulting the doctor today;
•
your infant is breastfed and thriving; and
•
you have no other complaints.
The doctor is expected to ask you about a family history of deafness but provide this information only when
asked. Your mother had operations for deafness on both ears many years ago. Your father, brother and sister
are not deaf.
The doctor may ask you further questions about your hearing loss:
•
both ears are affected;
•
it has no other special characteristics — 'just getting deaf:
•
you have not had exposure to very loud music (e.g. heavy metal music via earphones), or industrial noise;
and
•
you have no past history of ear infections.
Regarding severity:
•
you have difficulty hearing the baby cry if he is not in the same room as you are;
•
you have to have the television volume turned up (partner complains it is too loud): and
•
you have noticed that you seem to hear a bit better when there is a lot of outside noise.
Other points:
•
The examiner will NOT ALLOW the doctor to use the otoscope provided to examine your ear canals but
will ask about its use and what conditions are being looked for. Candidates should indicate they will look
for complete occlusion of the ear canal by wax (cerumen).
•
Hearing capacity — the doctor will whisper numbers or words in your ear, masking your other ear —
respond by saying that you CANNOT HEAR these sounds when they become soft.
•
Tuning fork tests:
~ When placed on top of your head say — 'same on both sides', in response to the doctor's question.
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~ When placed beside your ear and then pressed on the bone behind your ear, say that 'the latter is the
louder.' The doctor may then repeat the test with the fork beside your ear, to test air conduction, asking
you to say when the sound can no longer be heard. Respond accordingly after about 10 seconds 'can't
hear it now'. The doctor should then press the tuning fork on the bone behind your ear to test bone
conduction. Respond by saying 7 can hear that'.
~ If the candidate does the test in the reverse order (i.e. tests bone conduction prior to air conduction) react
as follows: 7 can hear that' (on bone). When it can no longer be heard say 7 can't hear that
anymore and when air conduction is tested, say 7 can't hear that either'.
•
The candidate should advise that referral for an audiogram or otolaryngological (ENT) opinion is necessary.
EXPECTATIONS OF CANDIDATE PERFORMANCE
Ability to distinguish types of hearing loss (in this patient conduction loss due to otosclerosis).
KEY ISSUES
•
Skill in use of tuning fork tests to define types of hearing loss — conductive versus sensorineural.
•
Ability to explain to the patient the problem and its management.
CRITICAL ERRORS
•
Failure to correctly use tuning fork in assessing hearing loss.
•
Failure to advise a referral for audiometry and/or ENT opinion.
COMMENTARY
'There are two kinds of deafness. One is due to wax and is curable; the other is not due to wax
and is not curable.'
Sir William Wilde (1815-1876). father of Oscar Wilde
We have made some progress in diagnosis and treatment since the above statement!
This station is predominantly a test of skill in clinical assessment of hearing loss requiring that the candidate
has a basic knowledge of types of hearing loss: conductive versus sensorineural, and that conductive deafness
due to wax occlusion or other causes must be excluded. The patient evinces conductive deafness due to
otosclerosis.
Deafness is a common problem in older people in our community. The onset of bilateral deafness in a young
woman during pregnancy is uncommon. The positive family history of a mother requiring surgery for her
hearing loss points towards an inherited cause, namely otosclerosis. The onset of this condition is generally in
early adulthood and may progress rapidly in pregnancy. The stapes footplate becomes ankylosed in the oval
window causing conductive type deafness. Patients may notice they hear more clearly in noisy surroundings.
The condition can be treated by prosthetic stapedectomy and vein grafting.
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The eighth cranial nerve has two functional parts, the vestibular and the cochlear components. The cochlear branch
subserves hearing. Afferent cochlear fibres from the inner ear pass through the internal auditory meatus and enter the
upper medulla at the level of the inferior cerebellar peduncle to reach the dorsal and ventral cochlear nuclei. Fibres
from these nuclei cross to the other side and end in the inferior colliculus. Fibres from that body go to the medial
geniculate body and the auditory radiation to the temporal cortex. It is important to note that there are bilateral
connections in the cochlear nucleus and above.
Sensorineural deafness occurs when there is damage to the cochlear nerve fibres anywhere from the inner ear to the
cochlear nuclei. The most common cause is degenerative changes in the elderly. Other causes include a fracture of
the petrous temporal bone and an acoustic neuroma.
Conduction deafness is caused by blockage of the ear canal and by damage or disease of the tympanic membrane or
ossicular chain or fluid in the inner ear.
• Establishing type of deafness — conductive versus sensorineural.
Hearing should first be tested clinically for each ear with the examiner's finger occluding the other ear. Few people now
have a ticking watch, so the examiner stands to the patients side and whispers numbers, which are repeated by the
patient.
The meatus, canal and drum are inspected with an otoscope, retracting the ear upwards and backwards to straighten
the canal. This excludes other nonacute causes of conductive deafness (such as wax, osteomas, otitis externa,
chronic otitis media). In this instance candidates will be informed that otoscopy is normal.
Deafness may be due to impaired conduction of sound through a muffled middle ear (conductive or middle ear
deafness); or to a lesion of auditory nerve, cochlear or brain (perceptive or sensorineural deafness).
A tuning fork of high pitch (256 Hertz or greater) is used to compare hearing by bone conduction and air conduction.
Normally air conduction is better than bone conduction. In nerve deafness air conduction remains better than
bone conduction in the affected ear or ears. In middle ear/conduction deafness, bone conduction becomes better than
air.
RinneTest
The vibrating tuning fork is placed on the mastoid, then at the auditory meatus: and the patient is asked which is louder.
Air conduction (AC) is normally louder and is also iouder in nerve deafness. Hearing the fork louder on bone
conduction (BC) indicates conductive deafness (BC > AC).
Alternatively, put the fork on the mastoid until no longer audible, and then put it outside the meatus. The sound will in
normal individuals be heard again and will also be heard again in nerve deafness, but not in conductive deafness.
Weber test
This can be very useful in unilateral deafness. The fork is placed on the centre of forehead in the midline; ask whether
this is louder in one ear or equal. Normally the sound is heard equally in both ears. Occlude one ear with a finger or ear
plug, and the sound will become louder in the affected ear (conductive deafness). In nerve deafness the sound is heard
better on the normal side. So in unilateral conduction deafness Weber test localises to the affected side, in nerve
deafness to the normal side.
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In bilateral conductive or bilateral nerve deafness the sound will be the same. Unilateral nerve deafness must be due
to a lesion of the nerve itself, as cortical radiations are bilaterally and diffusely represented in the temporal cerebral
cortices.
Common causes of conductive deafness are wax, otitis media, otosclerosis and Paget disease. Nerve deafness can
be due to cochlear degeneration, acoustic nerve tumour, drug ototoxicity, or trauma (fracture of petrous temporal
bone).
Knowledge of features of otosclerosis is required to identify the likely cause.
Otosclerosis is a common cause of bilateral symmetrical hearing loss in adults. The stapes footplate is ankylosed in
the oval window. The condition is familial (autosomal dominant), more common in women and worsens with
pregnancy so that patients may present during pregnancy. Patients may notice they hear more clearly in noisy
surroundings, whereas in perceptive hearing loss background noise worsens hearing. Investigation by audiometry will
be diagnostic. The condition can be treated by prosthetic stapedectomy and vein grafting. A hearing aid is less
effective for this condition and effectiveness gradually diminishes.
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Condition 055
Examination of a 20-year-old woman who dislocated her
shoulder 6 months ago
AIMS OF STATION
To assess the candidate's ability to perform a focused examination of the shoulder joint and of
axillary nerve function.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You dislocated your right shoulder six months ago whilst playing competitive basketball. The
dislocation was reduced successfully without anaesthesia at courtside.
You initially noticed you had an area of numbness (with loss of sensation) the size of your fist
over the lateral side of the upper arm below the shoulder tip, and you couldn't raise or keep your
arm above your head. You were told this was due to a nerve injury. Over the next month the
feeling gradually returned and the power in the arm came back.
By four weeks you were having active shoulder exercises out of the sling, and by four months
you were able to move the shoulder quite normally. You then began a graduated gymnasium
programme under the supervision of your physiotherapist. Your current programme includes
weight work and you have a full range of movements without loss of power as compared with the
other side.
You have resumed fully your normal activities of daily living and are keen to return to playing
basketball when the season starts again in three months. Your physiotherapist and gym
supervisor feel you are ready to return to this sporting activity but have suggested you get a final
clearance from your doctor.
Your shoulder will be examined by the candidate and it is now normal and without discomfort.
The candidate will give the findings to the examiner and then will discuss things with you.
Near the end of the assessment, the examiner will ask questions concerning shoulder function
and what nerve was originally damaged.
Appropriate prompts could be used as follows if the candidate does not provide you with the
information you require regarding returning to basketball.
Questions to ask unless already covered:
•
'Am I able to restart sport in three months, doctor?'
•
'Do I need any other tests done?'
•
'Would it help if I saw a specialist in Sports ' Medicine?'
•
'Is it likely to happen again?'
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EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate would be expected to check:
• Range of movement — flexion, extension, abduction, adduction, internal and external rotation
and circumduction — all will be normal
• Power of movement — normal
• Scale of muscle power used:
~ 0 = nil
~ 1 = flicker
~ 2 = active movement possible but not against gravity
~ 3 = active movement possible against gravity
~ 4 = active movement possible against gravity and resistance
~ 5 = full power — absence of wasting, particularly of deltoid muscle, which is supplied
by axillary nerve
• Sensation — now normal.
After six minutes, the examiner will ask (preferred answers in parentheses):
• 'Is shoulder function and movement now normal?' (Yes).
• 'Which nerve is at most risk from the usual type of shoulder dislocation?' (Axillary
nerve). If the candidate is unable to indicate which nerve is involved, a very unsatisfactory
mark should be given in the diagnosis category of assessment. As knowing the name of the
involved nerve is not a "KEY ISSUE" it would not mean a fail mark overall must be awarded,
but failing to test for axillary nerve function would be a critical error and generate a fail
assessment.
• 'Could you please now finish your discussion with the patient about her desire to
return to sport?' (All seems satisfactory for you to return to playing basketball. There is a
small likelihood that the shoulder dislocation will happen again. It would be advisable for
you to have the shoulder strapped before each game to reduce the likelihood of a
recurrence of the problem. Your physiotherapist will be able to teach you the best method
of strapping, and you then should be able to do it yourself, or get your coach to do it for
you).
KEY ISSUES
• Examination of the shoulder area indicating the appropriate technique to be used to evaluate
the shoulder and axillary nerve function.
• Display appropriate counselling skills when advising the patient concerning her desires to
return to sporting activities.
CRITICAL ERRORS
• Inability to assess adequately the normal range of movement of the shoulder joint.
• Failure to test the sensory and motor functions covered by the axillary nerve.
• Giving inappropriate advice concerning the likelihood of recurrent dislocation.
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COMMENTARY
A dislocated shoulder is a common injury in body contact sports. The shoulder joint is the most mobile synovial joint in
the human body. Protection is supplied by the overlying acromion and clavicle, and by the rotator cuff musculature that
closely envelops the joint. The major weak spot is below, where protection by surrounding muscles is less, and the
capsule is more lax to allow freedom of full flexion and abduction.
The common mechanism of dislocation is therefore displacement of humeral head from the glenoid downwards and
forwards. The axillary nerve runs between the muscles immediately below the capsule from front to back and is
therefore at hazard from stretching injury in shoulder dislocations. The axillary nerve gives motor branches to deltoid
and to teres minor, and supplies sensation as the upper lateral cutaneous nerve of the arm. It is important to test for the
integrity of the vulnerable nerve before reduction is undertaken and afterwards; just as it is to test sciatic nerve function
before and after reducing a posterior dislocation of the hip (the most common hip dislocation).
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Condition 056
Assessment of a groin lump in a 40-year-old man
AIMS OF STATION
To assess the candidate's ability to perform a focused inguinoscrotal assessment, and to
diagnose and advise on management of a reducible groin hernia.
EXAMINER INSTRUCTIONS
The real patients, with a variety of groin lumps will play themselves. The examiner will check the
physical findings prior to the assessment. The patient illustrated has a reducible right inguinal
hernia.
KEY ISSUES
• Performance of an appropriately focused inguinoscrotal assessment with appropriate technique
and accuracy
CRITICAL ERRORS
• Failure to display appropriate clinical skills in diagnosis of a reducible groin hernia
• Causing significant patient discomfort by rough technique.
COMMENTARY
Inguinoscrotal lumps are very common and present throughout life from birth to old age.
The history of onset of pain following a lifting strain and followed by a lump is very suggestive of a
groin hernia, and the appearance of the lump also supports this diagnosis.
The examination should be thorough but gentle. The groin area needs to be exposed and the
patient examined unclothed below the waist. It may be convenient to start with the patient
standing, as small hernias are often made more prominent when standing.
However, full examination and definition of all inguinoscrotal lumps is best performed with the
patient comfortably lying; and with an anxious, apprehensive or modest patient it is best to start
the examination with the patient lying supine. Examination with the patient standing should not be
omitted, however, as various swellings (such as varicocele, saphena varix) may only be apparent
on standing.
Inspection and palpation of the area enable one to answer:
• 'Is a groin hernia present?'A groin lump with an expansile impulse on coughing confirms the
diagnosis in this case. The lump is seen and felt to expand uniformly and expansively when the
patient coughs. The impulse ceases and the lump lessens or disappears when he relaxes.
• 'Is the hernia reducible?' Check this visually and by feel. Always ask the patient himself to
reduce the swelling before you try — in lumps of long standing he will be much more adept
than you!
• 'Is it an inguinal or femoral hernia?' This question is mainly of concern to the treating surgeon,
but usually the differentiation is clear. This lump's relations to the groin land-
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marks with an inguinal hernia are that the swelling is above the inguinal ligament and
medially placed in regard to the pubic tubercle. When you feel the impulse it is clear that it is
arising from the external (superficial) inguinal ring, the key to diagnosis.
• This patient's hernia is clearly an inguinal hernia. It arises from the external ring, has an
expansile cough impulse and reduces on lying down.
If the lump had come out from the region of the saphenous opening below the inguinal
ligament and more laterally (4 cm below and lateral to pubic tubercle) it would have been a
femoral hernia. Sometimes in obese people it is impossible to be quite sure clinically which
type of hernia is present.
CONDITION 056. FIGURE 2.
Right inguinal hernia
CONDITION 056. FIGURE 3.
Left inguinal hernia
CONDITION 056. FIGURE 4.
Right femoral hernia
CONDITION 056. FIGURE 5.
Larger right femoral hernia
CONDITION 056. FIGURE 6.
Bilateral femoral hernias
CONDITION 056. FIGURE 7.
Large left scrotal hydrocele
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• 'Is the inguinal hernia direct or indirect?' The brief answer is — often you cannot tell clinically,
and the diagnosis is made at operation for hernias confined to the groin alone. But if the hernia
is a larger one, which clearly extends well down into the scrotum, the answer becomes
obvious. Only indirect inguinal hernias descend into the scrotum by virtue of the anatomy of
the sac, which is within the spermatic cord. Whereas the sac of a direct hernia, which never
descends, is behind the spermatic cord. The candidate must check that an inguinoscrotal lump
reduces completely on lying down — there may in fact be two lumps — a reducible hernia
coming down from above and an unreducible scrotal hydrocele below!
CONDITION 056. FIGURE 8.
Bilateral large inguinal hernias,
probably indirect
CONDITION 056. FIGURE 9.
Large right indirect inguinoscrotal hernia
Patients with chronic obstructive airways disease and a chronic cough often develop acquired
bilateral direct inguinal hernias. These present as small swellings confined to the groin which
bulge directly forward through the enlarged external inguinal rings as illustrated.
CONDITION 056. FIGURE 10.
Bilateral direct inguinal hernias
CONDITION 056. FIGURE 11.
Varicocele
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After having arrived at the correct diagnosis (a reducible right inguinal hernia), the examination is not yet finished.
Multiple pathologies are very common. Both right and left sides must be checked — both inguinal and femoral orifices
— to check that the hernia is unilateral.
Additionally carefully check the spermatic cords/testes and their coverings to exclude an additional testicular swelling,
hydrocele, or epididymal cyst.
Feel femoral pulses and check that no abnormal lymph node enlargements are present. Do not forget to stand the
patient up to check for venous swellings or small hernias
Once a full diagnosis is made, consider treatment. Although surgery is not obligatory for all hernias, it is likely to be
appropriate in this manual worker. So, refer him appropriately, explaining that the benefits of surgery usually outweigh
risks (of which a number exists).
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Condition 057
Eye problems in an Aboriginal community
AIMS OF STATION
To assess the candidate's ability to interpret photographs of trachoma, to assess their
knowledge of the disease, and their ability to advise on appropriate management of
the condition,
EXAMINER INSTRUCTIONS
The examiner will have instructed the nurse as follows:
You are a trained nurse and have come to work in a small community in outback
Australia. You have no previous experience of this type of work and in particular, you
have little knowledge of the diseases often endemic in remote Australian Aboriginal
communities.
You have been in the community for a couple of weeks and have noticed that a
significant proportion of the community appears to have eye problems. You have taken
photographs of some of these individuals and have brought the images to the
community doctor so that you can get a medical opinion on the problems and how
they might be managed.
Questions to ask unless already covered:
• 'Do you think these might all be due to the same problem?'
• 'How does the infection get from one person to another?' (if infection is mentioned as
a cause)
• 'What will happen if the condition is not treated?'
• 'Is this condition found anywhere else and how common is it?'
• 'Is it preventable9 If so, how can it be prevented?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should be able to:
• recognise that eversion of the upper eyelid facilitates diagnosis;
• describe the changes in the photographs:
• recognise that the condition is trachoma, because of the setting of an indigenous
Australian Aboriginal community, with classical appearances of trachoma:
• describe the agent responsible for the disease (Chlamydia trachomatis), and the
vector of transmission (flies, hand contact, fomites);
• understand the pathological changes produced by the organism; and
• describe some simple and appropriate measures that might be employed to reduce
the risk of infection.
KEY ISSUES
• Interpretation of clinical photographs of eye changes produced by trachoma.
• Knowledge and understanding of trachoma, its mode of transmission and measures
used to reduce the risk of infection.
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CRITICAL E R R O R
•
Failure to recognise trachoma
COMMENTARY
Globally, trachoma is the most common infectious cause of blindness and is a preventable disease. It is endemic in
Africa, the Middle East, Asia and Aboriginal communities of Australia. More than six million people are blind as a
result of trachoma. It is a disease of poverty and the marginalised members of society.
The condition was known from ancient times as a contagious disease, and given the name trachoma (Greek),
meaning a 'rough' swelling.
Trachoma is caused by an obligate intracellular Gram-negative bacterium. Chlamydia trachomatis. The disease is
usually transmitted by direct contact or fomites between children and their mothers, or others involved in the care of
children, and by flies. Poor facial hygiene facilitates spread by attracting flies and there are often recurrent bouts of
infection within a family. Recurrent infection will cause chronic conjunctival inflammation, which is followed by
scarring of the tarsal conjunctiva. As scars mature, the tarsal plate becomes distorted and entropion (turning in of the
eyelid) develops and this results in trichiasis (misdirection of the eyelashes towards the globe). Chronic irritation of
the globe will lead to corneal abrasions, infection, opacification and finally, blindness.
Candidates should be able to identify the stages of trachoma, easily remembered by the acronym FISTO —
•
Follicles;
•
Inflammation;
•
Scarring;
•
Trichiasis; and
•
Opacity of the cornea.
Follicles are the sign of active trachoma infection, and represent the sites of replication of the causative organism.
The diagnosis of trachoma is confirmed by the presence of more than 5 follicles. They lead to scarring after multiple
attacks (dozens).
The scarring of the deep surface of the lid distorts the lid and results in lashes rubbing on the cornea, which ulcerates
and becomes infected and scarred. The resulting blindness is permanent.
Candidates should know that azithromycin is specific for the causative organism Chlamydia trachomatis.
The active disease is usually seen in young children, with inflammatory changes most apparent in young adults. The
scarring effects of infection develop in middle-age, when the patients present with trichiasis and corneal opacity.
A simplified grading scheme for trachoma which can be taught to and used by community health workers, was
introduced by the World Health Organisation (WHO) in 1987.
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Grade Definition
TF Five or more follicles seen on the tarsal conjunctiva of the everted upper lid. (Figures 1, 5)
Tl
Intense inflammation of the upper tarsal conjunctiva, obscuring the view of more thanhalf of the deep tarsal blood
vessels on the everted upper eyelid. (Figure 6)
TS White lines of subconjunctival scarring visible on the surface of the everted upper eyelid. (Figure 2)
TT Trichiasis, at least one eyelash rubbing on the globe, or evidence of recent
removal. (Figures 3, 4, 7)
CO Corneal opacity, obscuring at least part of the pupil margin. (Figures 3, 4, 7)
The candidate should be able to discuss public health measures. Some practical advice for a community nurse would
be along the lines of the SAFE strategy, developed by the WHO.
• Surgery: identification of individuals in the community who might benefit from correctional eyelid surgery for
trichiasis and entropion.
• Antibiotics: children should be examined (with eversion of the upper eyelid) for trachoma and all members of a
family where there is active trachoma should be treated with oral azithromycin
• Facial cleanliness communities, and particularly affected families, need to be educated about the disease, its
mode of spread, and that simple measures such as ensuring facial cleanliness will reduce the risk and severity of
trachoma.
• Environmental upgrade: any improvement in water supplies, household sanitation, personal and community
hygiene will reduce the risks of infection. Improved cleanliness in sleeping areas with fly and dust control should be
emphasised.
Additional trachoma examples are shown below. Upper eyelid eversion to inspect for follicles facilitates early
diagnosis.
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CONDITION 057. FIGURE 5.
Inflammatory follicles on the under
surface of the upper tarsus (TF)
in closeup
CONDITION 057. FIGURE 7.
Entropion with trichiasis (TT) and corneal
opacification (CO)
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CONDITION 057. FIGURE 6.
Inflammatory changes on the everted
upper eyelid (Tl)
2-C: Choice and Interpretation of
Investigations
Reuben D Glass and Vernon C Marshall
'It is not of decisive significance whether the clinician confronts an overwhelming or a
modest amount of material, if only he understands how to exploit it: in other words, he
must be in a position to put the right questions and to find the right methods for
answering them.'
Rudolf Virchow (1821-1902)
Disease, Life and Man
Modern medicine relies considerably on the results of special investigations. Previously, the
traditional stock-in-trade of the astute clinician has been the manner in which his unaided clinical
senses of observation, hearing and touch are used in making diagnoses and in formulating
strategies of management. But times and clinical practice have changed. Investigations play an
increasingly important (though still not all-important) part in the practice of medicine. Major
growth of special investigations has occurred in the fields of laboratory medicine and in organ
imaging. The clinician in such instances often assumes the role of consumer, and must be alert
to the possibility that an opinion given by another (or the data issued by a machine) is not always
absolutely reliable and may occasionally be wrong. This short introduction aims to give a general
idea of the circumstances in which special investigations are essential, useful, profitable,
redundant, or potentially dangerous, and to help in their choice and interpretation.
Patients often assume that when a test is ordered, it will answer whether disease is present or
not. Clinicians sometimes make the same mistake. A test may be useful for helping to confirm, or
helping to exclude the possibility of a disorder, but will seldom give a perfect answer. A frequent
error is to suppose that a given test is equally useful for confirming or excluding disease, but this
is usually not true. The clinician who orders a test should always be mindful of the reason for its
use. If the test result will not alter the patient's management, there is little point in ordering it.
Diagnostic accuracy of any test will depend upon how well it performs in comparison with its
performance against another so-called 'gold standard'. The histological diagnosis of cancer is
the usual yardstick against which the performance of another less invasive test is measured.
More often, however, one must compare the accuracy of several available tests to determine
which is best.
TEST RESULTS AND THEIR IMPLICATIONS
A frequent error is to
suppose that a given
test is equally useful for
The performance of a test may be studied in a survey of a particular
confirming or excluding
population.
disease, but this is
The test sensitivity is the percentage of patients k n o w n t o h a v e a usually not true. The
particular disease, whose test proves positive ( t r u e p o s i t i v i t y ) The clinician who orders a
down side of high sensitivity is a potentially high false positivity rate: test should always be
the proportion without the disease who also test positive.
mindful of the reason for
The test specificity is the percentage of patients in that population its use. If the test result
k n o w n t o b e f r e e of the disease, in whom the test proves negative will not alter the patient's
{ t r u e n e g a t i v i t y ) The down side of high specificity would be a high management, there is
false negativity rate: the proportion with the disease who also test little point in ordering it.
Sensitivity and Specificity
negative.
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Investigations
of
The following examples explore these concepts: Example 1
A group of 1,000 patients is tested for the presence of a certain disease (Table 1 ).
Results
SECTION 2-C. TABLE 1.
Test results in 1,000 patients affected with a disease.
Disease Present
Test Positive
Test Negative
Total:
18
2
20
(a)
(c)
(a+c)
Disease Absent
20
960
980
(b)
(d)
(b+d)
Total
38 (a+b)
962 (c+d)
1.000 (a+b+c+d)
The sensitivity is a/(a+c) which in example 1 is 18/20= 90%
The specificity is d/(b+d) which in example 1 is 960/980=98%
Results of research studies are often presented in this way. Sensitivity and specificity are epidemiological measures,
which need to be adapted for clinical use.
Predictive values
In considering individual patients with unknown disease status on presentation, the clinician wishes particularly to
know the predictive value of the test: that is, the likelihood of a positive or negative test confirming or excluding the
disease.
•
Positive Predictive Value is the proportion of persons testing positive who actually have the disease. (The false
positives comprise the 'false alarm rate').
•
Negative Predictive Value is the proportion testing negative who in fact do not have the disease. (The false
negatives comprise the 'false reassurance rate').
The clinical interpretation of the test may be given as:
The positive predictive value is
a/(a+b)
The negative predictive value is
d/(c+d)
The false alarm rate is
b/(a+b)
The false reassurance rate is
c/(c+d)
which in example 1
which in example 1
which in example 1
which in example 1
is 18/ 38
is 960/ 962
is 20/ 38
IS
2/962
= 47%
= 99.8%
= 53%
= 0.2%
Implications:
This test has a high specificity (98%). and thus is very helpful in excluding disease. If it gives a negative result, there is
a very high likelihood that disease is absent (99.8% negative predictive value). Conversely, there is a very low chance
that this negative result will give false reassurance (0.2% false reassurance rate). It has a lower sensitivity (90%),
and is much less useful in confirming disease. It misses 10% of cases with the disease and is more likely to be
positive — and thus gives a false alarm — in patients without the disease (53%) than in those with the disease (47%).
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The ideal test should have absolute sensitivity — all people within the test group with the condition will give a positive
test result.
The ideal test should also be absolutely specific (the converse of sensitivity) — all people within the test group who do
not have the condition will give a negative result. If a test had a sensitivity of 1 and a specificity of 1 its probability of
error would be zero, and positive and negative predictive values would be 100%. With such an ideal test there would
be no false positives and no false negatives. The ideal test should also be attended by a very low level of random or
systematic errors of measurement. It should be highly reproducible: the error within and between observers should
be very low. No test absolutely measures up to all these ideals.
Biochemical tests are based on results from a healthy population sample. These results will usually have a Gaussian
normal distribution bell-shaped curve pattern when plotted. Laboratory reports often imply that results falling outside
two standard deviations from the mean are 'abnormal'. Such reports should be treated with caution, as by statistical
definition, one in 20 healthy individuals would fit this category. A similar spread of results is obtained when examining
patients with a particular disease. As there is overlap between the values in healthy and diseased patients, the choice
of a cut-off point between a positive and negative test result is artificial. In such tests, specificity and sensitivity are
likely to be inversely related. For example, in screening tests for prostate cancer, a serum prostate specific antigen
(PSA) level of 4 ng/mL is frequently used as the cut-off level. The test has a range of levels, and at high levels the risk
of prostatic cancer being present is increased. At lower levels more patients will be identified who have a condition
other than prostate cancer (prostatitis, benign prostatomegaly etc.). Reducing the cut-off level of the test to 2 ng/mL
would increase the test sensitivity but reduce the specificity. This will increase the number of false positives and create
anxiety for a greater number of patients who would subsequently be worked up to decide whether the test was truly
positive for prostate cancer.
Implications:
A highly sensitive test is an appropriate one for screening a population for an
abnormality. A negative result in a highly sensitive test will effectively rule out the diagnosis. The fact that the test is not
absolutely specific for the abnormality but also identifies a number of individuals, who are normal or have some other
condition, can subsequently be taken care of by applying to the identified group a further test which is highly specific
(but not so sensitive). In the highly specific test on individuals picked up by the sensitive screening test, a positive
result will effectively give a definite diagnosis. In the prostatic example above the subsequent test would be a tissue
biopsy confirming cancer.
Faecal occult blood testing for bowel malignancies is another example of a test with a relatively high sensitivity but
poor specificity, which will require further assessment (endoscopy) of those identified with a positive result. The
sensitivity is determined also by the biology of the condition. In colorectal cancer, a faecal occult blood test will not
detect neoplasms which do not bleed.
Other relevant aspects of testing are the frequency and importance of a disease and its duration and natural history.
Unfortunately, measures of predictive value have limitations in clinical practice, as they depend on the
prevalence of the disease in the population (Disease prevalence:
the number of people with the disease in the test population at the time of testing. This should not be confused with
disease incidence: the number of new cases of the disease occurring in the population over a set time interval).
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The utility of a test is influenced by population differences. Suppose the same number of affected patients (20) with
the disease illustrated in Example 1 in a population of 1,000, were spread about a population 10 times the size
(10,000 — Example 2, Table 2):
The prevalence of the disease is
20
1000
20
10000
(a+c)/ (a+b+c+d) which in Example 1 is
and in Example 2 is
Example 2
= 2% (Table 1)
=0.2% (Table 2)
SECTION 2-C. TABLE 2.
Test results in 10,000 patients in a region of lower disease prevalence.
Disease Present
Test Positive
Test Negative
Total:
18
2
20
(a)
(c)
(a+c)
Disease Absent
200
9,780
9,980
(b)
(d)
(b+d)
Total
218 (a+b)
(c+d)
9,782 10,000 (a+b+c+d)
The test sensitivity (90%) and specificity (98%) are unchanged in Example 2 from Example 1 However, in this larger
population, with a disease prevalence of 0.2% (compared to a prevalence of 2% in Example 1 ), the negative
predictive value has increased to almost 100%, while the positive predictive value is now only 8%.
The predictive value of a positive test depends on the frequency of disease in the population
Example 3: breast cancer evaluation
The following table gives results of a highly specific test (T: needle core biopsy) performed in 600 women showing
focal mammographie abnormalities, to diagnose or exclude the worst case disease (D: breast cancer).
SECTION 2-C. TABLE 3.
Test results for 600 women with focal mammographie abnormalities.
Test(T)
Patients with cancer
Patients found free of
Needle core biopsy
subsequently confirmed
(D positive)
cancer subsequently
(D negative)
Total
Needle core biopsy
Positive for cancer
143
a
2
b
145
Needle core biopsy
Negative for cancer
15
c
440
d
455
Breast cancer 158
Benign Conditions 442
600
Total
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Choice and Interpretation of
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Sensitivity of test (true positivity)
Specificity of test (true negativity)
False Positivity Rate
False Negativity Rate
Positive Predictive Value
Negative Predictive Value
False Alarm Rate
False Reassurance Rate
Prevalence of breast cancer in test population
a/( a+c)
d /(b+d)
b/ (a+b)
c/( c+d)
a/( a+b)
d/(c+d)
b/(a+b)
c/(c+d)
(a+c)/( a+b+c+d)
143 /158
440/ 442
2/ 145
15 /455
143/145
440/455
2/145
15/455
158/600
91%
99%
1%
3%
99%
97%
1%
3%
26%
Implications:
Positive and negative predictive values are seen to be strongly affected by the characteristics of the test
(sensitivity and specificity) and by characteristics of the population (disease prevalence). Here 26% of those
showing focal abnormalities on mammography (the original screening test) ultimately proved to have cancer.
Core biopsy had very good (99%) positive predictive value, but not quite so good (97%) negative predictive
values. A small but not insignificant group (3%) had cancer found at operation done to remove the
mammographie abnormality, after preoperative false reassurance.
Likelihood ratios and scoring systems
Use of likelihood ratios, which may be considered as measuring the 'leverage' of a test, is a method of
separating the characteristics of a population from the inherent value of a test. In assessing the result of a test,
the clinician may follow the following thought process:
Depends on population Depends on test characteristics
Before performing a test, the clinician should have an idea of the possibility of disease in
the population. This can be expressed mathematically as prevalence probability (a+c)/(a+b+c+d), or more
usefully here as 'prior odds', which is the ratio comparing the number of patients with disease to the number of
patients without disease, or (a+c)/(b+d)
The usefulness of a test is measurable by the likelihood ratio. The likelihood ratio of a positive test is the
frequency of a positive test in disease compared with its frequency without disease, or [(a)/(a+c)]/[(b)/(b+d)].
The value in example 1 is thus [(18/20)]/[(20/980)]. or approximately 50.
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Multiplying the prior odds by the likelihood ratio gives revised odds, or chances that disease will be present,
compared with absent:
In example
1, the prior odds are 20/980, or approximately 0,02 in favour of disease (or 50:1 against); revised
odds are 0.02 x 50 = 1, i.e. 1:1 or a 50:50' toss-up.
In example 2, the prior odds are 20:9980 or 0.002 in favour of disease (or 500:1 against); revised odds are 0.002
x 50 = 0.01 in favour of disease (or 10:1 against).
Implications:
It should be noted that the likelihood ratio often has a different value for a positive or a negative test. If the test is
negative, the likelihood ratio (negative) is the frequency of a negative test without disease, compared with a
negative test in disease, or [ d / ( b + d ) ] / [ c / ( a + c ) ] . This is not the reciprocal of the likelihood ratio (positive); a
test will not be equally useful for confirming or excluding disease.
In example
1, the likelihood ratio (negative) is [(960/980)/(2/20)] or approximately 10. In that example, where
the prior odds of no disease were 50:1, the revised odds against disease, given a negative test, are now 500:1.
In example 2, the prior odds of no disease were approximately 500:1, the revised odds are now 5000:1.
Various scoring systems have been proposed, which follow a similar logic, using addition of mathematically
derived scores, rather than the multiplication of odds and ratios. While some believe that addition of 'weights' in
this way may parallel the clinician's thought processes more closely, these systems have not been widely
adopted.
Test Error
The possibility of error in any test must thus always be considered. Most disturbing of all is the prospect of a
mistake in the distinction between life and death. Now that the transplantation of cadaveric tissues has become
a clinical reality, and because procurement of such tissues within a short time of death is essential to success,
the unequivocal early diagnosis of brain death has demanded diagnostic tests of scrupulous and unparalleled
stringency. As will be seen in the book example relating to brain death, note that virtually all the tests for brain
death involve direct observation of the patient by at least two experienced clinicians rather than the application
of potentially imperfect technologies.
USEFULNESS OF TESTS1
The more tests that are performed on a patient the more likely it is that one or another will give a falsely
abnormal result by pure chance. Another important factor is that multiple deviations from normality are common
in any individual, especially in an ageing population. So, if multiple diagnostic tests are applied to a given patient
in a mindless scattergun fashion, it is almost inevitable that one or more will be reported as positive. These
positive results may be true or false, important or unimportant, relevant or irrelevant to the patients problem.
Relatively simple clinical problems can all too easily become lost sight of in the maze created by multiple
investigations.
1 Glass, R.D., Di ag n os i s : a bri e f i n tr od ucti o n , Oxford University Press, Australia, 1996
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Diagnostic utility of a particular test is thus determined by:
• the prevalence and importance of the condition tested for;
• the diagnostic accuracy of the test and how it compares to that of other well established
tests;
• the invasiveness of the test and the risk to the patient from its performance;
• the test's cost and availability; and
• whether the outcome of the test will influence the management of the patient's complaint.
Case Example
The following case study demonstrates the optimal integration of morphologic and functional
imaging and biochemical investigations with diagnostic and management plans and pathways in
a patient with an unexpected incidental finding on initial investigation.
A 66-year-old man presented to his general practitioner after an episode of right upper quadrant
abdominal pain, which had resolved after four hours. Clinical examination was noncontributory.
An abdominal ultrasound was ordered with a provisional diagnosis of gallstones and associated
biliary pain. The ultrasound showed a normal gall bladder and biliary system free of stones, but
revealed a focal round solid mass 5 cm in diameter, above the right kidney, inferior to the liver,
and in the position of the right adrenal gland. (Figure 1 )
SECTION 2-C. FIGURE 1.
Ultrasound findings
An abdominal CT was next done to delineate more accurately the pathology. Intravenous and oral
contrast material were used to enhance imaging. (Figure 2)
The mass was confirmed to be a focal 5 cm round, solid mass within the right adrenal gland,
extrinsic to the posteroinferior right lobe of the liver, and to the right of, and lateral to, the inferior
vena cava, and superomedial to the right kidney. The mass had smooth borders and appeared
well encapsulated without any evidence of infiltration of surrounding structures. The left adrenal
was normal and no other intra-abdominal mass or pathology was noted.
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SECTION 2-C. FIGURE 2.
Computed tomography (CT) of abdomen
Was this adrenal mass relevant to his symptoms, or was It an 'Incidentaloma '? Small benign
adrenal adenomas of no clinical relevance are very common in patients of this age, but are
mostly less than 2 cm in diameter. This one is larger (5 cm) and masses of 5 cm or above are
more suspicious of malignancy. Removal is often advised for larger tumours even it
nonsymptomatic.
He was referred for specialist opinion.
Further detailed history with focused questioning was helpful. For the last 8 years he had
noticed 'funny turns ' episodically. These caused him to feel dizzy and nauseated, and were
associated with thumping and pounding in his chest, and a throbbing in his head thai lasted for
several minutes.
The experienced clinician recognised that such a pattern would be consistent with
catecholamine surges produced by an adrenal medullary tumour — a phaeochromocytoma.
Family history can be important in phaeochromocytomas associated with multiple endocrine
neoplasia Type 2, with associated parathyroid hyperplasia (C cells) and medullary thyroid
cancer. No such family history was obtained here; and clinical examination of neck was normal
as was the serum calcium level.
There was no family history of hypertension. His father died of a stroke and his mother of
gastric cancer, both in their 80s. He had a past episode of a bleeding peptic ulcer 30 years ago
(duodenal ulcer is associated with phaeochromocytomas) and minor symptoms currently of
urinary hesitancy.
His prostate felt normal on rectal examination. He had no cough, chest pain, dyspnoea or
sputum and did not smoke (adrenal metastases from lung or other primary sites need to be
remembered).
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The range of endocrine overactivities from an adrenal tumour can involve singly or in
combination:
• Glucocorticoids from adrenal cortex: Cortisol excess (Cushlng syndrome). There were no
stigmata of hypercortisolaemia clinically — no moon face, no hypertension, no body fat
redistribution, no cataracts.
• Mineralocorticoids from adrenal cortex: aldosterone excess (Conn syndrome). Hypertension is
the common association here, together with hypokalemia. His electrolytes were normal.
• Adrenal sex hormones from adrenal cortex: these may give virilisation in women.
• Catecholamines from adrenal medulla (adrenaline and noradrenaline): phaeochromo-cytoma.
This seems most likely from the history. Again hypertension is a common association. Thus
the three most common adrenal tumours each can cause secondary hypertension, although
his blood pressure was normal on review. However hypertension may be episodic, particularly
with phaeochromocytoma.
Functional endocrine investigative studies were arranged. Modern endocrinological tests have
high specificity and sensitivity. Initial screening urinary or serum analyses are most reliable
following an episode of symptoms but do not of course localise the site of origin. A battery of
screening tests was ordered, as well as standard preoperative screening tests.
• Full blood examination
normal, Hb 151 g/L
• Cardiovascular status
ECG sinus rhythm, no evidence cardiac ischaemia
• Echocardiogram
• Electrolytes
• Coagulation studies
• Blood glucose
no ventricular hypertrophy
normal
no abnormalities
mild elevation
• Specific urinary catecholamine excretion analysis can be for end products (VMA —
vannylmandelic acid), or for adrenaline and noradrenaline themselves (normally 80%
adrenaline and 20% noradrenaline).
Urine 24 hour analyses for excretion of adrenaline and noradrenaline were done in this
case and were markedly elevated, with high levels of both noradrenaline and adrenaline
— noradrenaline 1160 mmol/day (45-600), adrenaline 720 mmol/day (5-80).
As adrenal tumours may produce more than one hormone, a check for aldosterone effects was
also done measuring plasma aldosterone, renin activity levels, and aldosterone/renin ratio. All
were within normal range. Hydrocortisone (Cortisol) levels were also normal.
The diagnosis of right adrenal phaeochromocytoma was thus definitively established, and
Conn and Cushing syndrome excluded. But was the tumour only at one site?
Phaeochromocytoma often causes attacks of episodic hypertension only and can be at multiple
sites. It is designated the 10% tumour — 70% are bilateral, 10% are at extra-adrenal sites, 10%
are malignant. Previously, extended open laparotomy was required to check fully for other
abdominal sites — the opposite adrenal, the retroperitoneum down to the pelvis, the urinary
bladder, and in the presacral area around the great vessels. Open surgery required large
incisions, major surgical dissection of hazardous tissue planes, and inpatient stays of up to 2
weeks.
The advent of nuclear medicine has enabled accurate preoperative functional imaging to confirm
one or multiple sites precisely. Extra-adrenal tumours secrete noradrenaline only and are almost
always associated with hypertension, but the opposite adrenal always needs to be excluded as a
source.
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Final investigation: Radionuclide localising scan
Metaiodobenzylguanidine scan (MIBG): A radioiodine labelled agent (MIBG). which is taken up
by catecholamine precursors, is injected. Abdominal scintigraphy will localise the functioning
tumour as illustrated (Figure 3). The test is specific and sensitive.
SECTION 2-C FIGURE 3.
Functional nuclear scan for
catecholamines, showing hot spot
below liver on right
The scan confirmed a single hot area at the site of the right adrenal with no activity in the left
adrenal or elsewhere. Preparation of the patient for surgery now began. Preoperative elective
catecholamine blockade over a period of 1-2 weeks has now virtually eliminated the hazard of
operative adrenal crisis due to a catecholamine surge with life-threatening hypertension.
Adrenaline and noradrenaline stimulate a and /3 (vascular and cardiac) receptors. Initial
a-receptor blockade was begun with phenoxybenzamine, followed by (1-receptor blockade
(propranolol) after a-blockage had occurred.
During surgery nitroprusside and phentolamine should be available to control bleed pressure
swings precisely. Laparoscopic surgery is particularly applicable to well localised functioning
adrenal tumours. Excellent views are obtained, separation of the tumour from major adjacent
vasculature is facilitated, required hospital stay is reduced, and rapid convalescence ensured.
Only very large tumours, malignant tumours, or evidence of tumours at multiple sites are
contraindications to a laparoscopic approach. The operation was uneventful with removal of the
right adrenal and its contained tumour. His convalescence was straightforward with discharge
from hospital within 2 days of surgery.
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SECTION 2-C. FIGURE 4.
Adrenalectomy specimen
Diagnostic utility was appropriate in this instance for each of the carefully planned sequential
investigations across a spectrum of imaging, biochemical, and radionuclide tests, leading to
precise diagnosis and focused surgery with every expectation of complete cure.
OFFICE TESTS USED IN PATIENT ASSESSMENT
Body Temperature Measurement
This test illustrates many of the points discussed. Temperature recording is easily performed and
inexpensive, can be done accurately, is non-invasive and effectively free from risk. In terms of
detecting abnormality, it is extremely sensitive, but very low in specificity. It is a cost effective test
that can and should be applied to almost all clinical problems. A significantly elevated body
temperature indicates (in the absence of factitious malingering) an organic inflammatory or
infective ailment. The test is thus an excellent all round screening measure.
Urinalysis
This shares many of the performance characteristics of temperature measurement and can be
applied at minimum cost to virtually all clinical patients. Observer error has been reduced to a
minimum by the development of user-friendly dipsticks. These can provide highly specific and
highly sensitive identification of glycosuria, proteinuria, biliuria, haematuria and other
abnormalities. Medieval manuscripts used depictions of inspection of a urine flask (urinoscopy)
as a convenient symbol of the medical practitioner — a convention based on clinical reality at the
time. Modern technology has enhanced rather than diminished the utility of urinoscopy/urinalysis
in diagnosis.
Urinary positivity for glucose will depend upon renal threshold. Blood glucose fingerprick analysis,
now also readily available by user-friendly office instruments (glucometer), allows rapid
identification of hyperglycaemia and can often establish the presence of diabetes. An elevated
random blood glucose level over 11 mmol/L will effectively confirm the diagnosis of diabetes.
Glycosuria and glycaemia here serve as complementary screening and diagnostic tests — high
sensitivity screening augmented by specific diagnostic testing.
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Urine tests for pregnancy diagnosis
Another very widely used urinary test for office or home use, which gives results within a few minutes, is urinary
detection of human chorionic gonadotrophin (hCG) using monoclonal and polyclonal antibody test strips. Positive
testing for pregnancy can occur from the first day of the missed period with a sensitivity of 25 mu/ml. Sensitivity and
specificity progressively increase thereafter as the pregnancy progresses.
In many clinical consultations with women of childbearing age with abdominal pain, particularly if accompanied by
menstrual irregularities, a spot urinary pregnancy test is prudent and often diagnostically helpful.
Urine tests for diagnosis of ovulation time
Home monitoring of urinary luteinising hormone (LH) antibody from 17 days before the expected period can detect the
LH surge indicating that ovulation will occur within 24-36 hours.
Electrocardiograph/electrocardiogram (ECG) Previously a quite sophisticated test, ECG is now increasingly
available for on-the-spot office consultation and provides sensitive and specific information regarding cardiac rate and
rhythm and cardiac function, complementing cardiologie history and examination.
Ultrasound/Doppler probes
Hand held battery-operated ultrasound probes can be used to more accurately identify arterial or venous blood flow,
aiding diagnosis of peripheral arterial insufficiency, arteriovenous shunting, or venous obstruction and incompetence.
In the wards they can aid physical examination to detect a full or empty urinary bladder in postoperative patients.
Mass screening of populations, used in our community to identify common life-threatening diseases (cancer of
breast, colon) and cardiovascular disease (coronary artery disease and stroke), involves mammography, faecal occult
blood examination, measurement of blood pressure and serum lipids, and other programmes. The effectiveness of
these programmes is determined by sensitivity and specificity of the tests employed and their cost, plus the
prevalence and importance of the disease in the community. The ultimate goal of such screening programmes is to
diminish mortality by early detection of diseases, or by detecting persons who are at high risk of developing disease
and introducing preventive strategies. The additional requirement of cost-effectiveness in achieving such goals often
requires years of prospective study.
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USE OF INVESTIGATIONS IN CLINICAL PROBLEM-SOLVING: CHOICE OF
INVESTIGATIONS
Tests used to aid clinical diagnosis of the patients presenting problem should utilise discriminative strategies rather
than the cumulative strategy of performing more and more tests in the hope that something will turn up. Tests used
discriminatively and with appropriate perception and perspective will enable the diagnostic process to move along
appropriately focused lines to best advantage.
Data collection from focused history and physical examination leads to the discriminative clinician asking the
questions:
• What is the patient's presenting condition?
• What is the diagnosis?
• What else could it be?
• Have I enough certainty to stop testing and go on to treatment?
• If more tests are required which are the best and in what sequence, and over what time interval?
For example, in diagnosing headache, acute headache is often part of an upper respiratory tract infection presentation
associated with other symptoms of general loss of well being. Chronic and recurring headaches are most usually due
either to tension headache, migraine or cervical dysfunction/spondylosis. Of the many other causes, warning flags
should be looked for in the clinical assessment to exclude temporal arteritis, subarachnoid haemorrhage and cerebral
tumour. A persisting headache is also an associated symptom secondary to a wide range of other conditions. CT head
scan is only required in the minority of instances, when an intracranial lesion causing cerebral compression with
increased intracranial pressure is suspected.
Low back pain and neck pain are most often due to temporary soft tissue musculo-ligamentous strains ('nonspecific
mechanical back pain'). Precise anatomical or pathologic diagnosis is often not possible. The place of investigations is
confounded by the facts that degenerative change in discs and facet joints which could be associated with
symptomatic pain are found in a significant proportion of nonsymptomatic individuals, especially those aged over 40
years, where the prevalence is likely to be at least 30%. Contrariwise in patients with chronic low back pain, no
significant organic pathology is demonstrable in around 30% of patients.
Plain X-rays will exclude serious bony lesions and may give evidence of soft tissue pathology, but CT (or nowadays
and increasingly, MRI scanning) gives the most accurate assessment of soft tissues; and despite its expense the latter
investigation of MRI is usually the preferred investigation in chronic spinal pain. Ultrasound is of limited use in spinal
pain, but ultrasound is usually the investigation of first choice in acute or chronic shoulder pain following injury.
However, ultrasound is very observer-dependent, and again MRI is likely to be more sensitive and specific.
With acute abdominal pain, a small group of patients with a catastrophic syndrome of 'acute abdominal surgical
emergency' requires urgent surgery with minimal preoperative investigations. In this case surgery is the major and
most urgent investigation, and leads directly to diagnosis and management of such causes as acute abdominal aortic
aneurysm rupture, and acute ischaemic strangulation of bowel. Upper abdominal pain which is less urgent, or chronic,
can be investigated by plain or contrast X-ray. ultrasound, isotope studies, endoscopy, CT or MRI together with a host
of biochemical and other laboratory tests. If gallstones are thought to be the most likely pathology causing abdominal
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pain ultrasound is the most appropriate first investigation. Ultrasound is noninvasive, can be used both in emergency and
elective situations, displays the gallbladder wall and contents as well as the bile duct system and picks up many
associated or alternative diagnoses (particularly in liver, kidneys, pancreas and spleen). If peptic ulcer is thought most
likely, endoscopy is usually the best initial investigation and aided by biopsy can distinguish benign from malignant
lesions. Pain thought to arise from the pancreas is likely to require early CT. The use of combined noninvasive modalities
such as helical CT or magnetic resonance cholangiopancreatography (MRCP) can now provide high sensitivity and
specificity with high resolution imaging.
Newer techniques such as multi-slice CT (MSCT) are becoming the examinations of choice for assessment of various
body systems and organs.
MSCT allows greater information to be gained due to the thinner multiplanar slices acquired, which can be reviewed in
multiple planes or in three dimensions to give superbly detailed images as illustrated (Figures 5-9).2
SECTION 2-C. FIGURE 5.
SECTION 2-C. FIGURE 6.
SECTION 2-C. FIGURE 7.
Spine
Extremity
Abdomen
SECTION 2-C. FIGURE 8.
SECTION 2-C. FIGURE 9.
Angiography
CT Angiography
2 Figures reproduced by permission of MIA Victoria, a member of l-MED/MIA Network; A Guide to Multi-Slice CT Scanning.
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In patients with jaundice, liver function tests are usually of limited value in diagnosing the cause
of the jaundice, but they provide information which must be taken into account in formulating
further diagnostic and management plans. Ultrasound and helical CT or MRCP comprise
investigative mainstays. Important investigations prior to surgical management include blood
coagulation tests and tests of renal function. Patients with suspected bowel pathology can be
investigated either by radiology or endoscopy. Colonoscopy is preferred to diagnose mucosal
lesions.
For focal subcutaneous lumps and focal skin lesions, in many instances no investigations are
required and an accurate diagnosis can be obtained from the clinical history and examination. If
the lump or skin lesion is clinically suspicious then the definitive investigation is often histological
examination of an operative specimen. Preliminary diagnostic investigations are often done to
determine more accurately the physical nature of deep lumps. Ultrasound can differentiate
between cystic and solid lesions, while CT or MRI will give more precise diagnosis. Once the
decision is made that microscopic examination is necessary, fine needle aspiration cytology
(FNAC) is often a highly specific test, particularly for patients presenting with breast lumps
(palpable or picked up by imaging), or subcutaneous lymph node swellings. Aspiration cytology
gives cytological rather than histological diagnosis; but using flow cytometry and assessing
surface receptors to differentiate subsets of T and B lymphocytes can diagnose and differentiate
polyclonal and monoclonal lymphomas, as discussed in Section 4-A.
Cytological studies may also demonstrate the likely origin of metastatic lesions by finding
squamous neoplastic cells in a lymph node neck swelling, or by finding a papillary thyroid lesion
in neck lymph nodes. Primary growths of pharyngolarynx and thyroid can be small and occult in
association with larger nodal metastases. Accurate cytology can point the way to a further
appropriate sequence of diagnostic investigations. Finally core biopsy by percutaneous needling
is widely used and is the preferred diagnostic method for solid breast lumps and other deeper
lumps where tissue diagnosis is required.
In the examples which follow, candidates should exercise care in the choice and interpretation of
investigation in order to direct and focus diagnostic and management pathways.
Reuben D Glass and Vernon C Marshall
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2-C Choice and Interpretation of Investigations
Candidate Information and Tasks
M CAT 058-064
58
Positive test for hepatitis C in a 26-year-old woman
59
Diagnosis of 'brain death' prior to organ donation
60
Breast biopsy concerns in a 20-year-old woman with a family history of breast cancer
61
An elbow injury in an 11-year-old schoolgirl
62
Sudden onset of chest pain and breathlessness in a 20-year-old woman
63
Atypical ureteric colic in a 25-year-old man
64
Investigation for male factor infertility in a 25-year-old man
312
058
Candidate Information and Tasks
Condition 058
Positive test for hepatitis C in a 26-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 26-year-old woman who has been sent to see you
because she was tested for hepatitis B and C and for HIV when she attended the Red Cross blood bank as a blood
donor one week previously and was found to be hepatitis C positive.
She has just been notified that she was found to be hepatitis C positive and advised to see her local doctor for further
assessment. Other blood tests were negative for both hepatitis Band HIV.
She had never given blood before, and had not been tested for any of these infections previously.
YOUR TASKS ARE TO:
• Take a relevant history from the woman.
• Advise her about subsequent management and likely prognosis.
The Performance Guidelines for Condition 058 can be found on page 321
313
059
Candidate Information and Tasks
Condition 059
Diagnosis of 'brain death' prior to organ donation
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a secondary school science teacher.
Next week a doctor from the Australian Kidney Foundation is going to speak at a class seminar to all the Year 11
students about organ transplantation and the donation of organs and tissues from donors who have died. The teacher
is to chair the seminar which has been titled The Gift of Life'.
The teacher has heard about 'brain death' and found the protocol below on the internet and printed it out. He wants you
to explain it to him in understandable language to help him comprehend the implications and facilitate his
chairmanship.
CONDITION 059. TABLE 1.
Brain death protocol.
PREDETERMINED CRITERIA BEFORE TEST
• Core body temperature > 35 °C
• No central nervous system (CNS) depressant drugs for > 48 hours (longer if CNS depressants given in large
amount or for a long time)
• No neuromuscular blocking drugs for > 12 hours
• No endocrine problems, eg hypothyroidism, hypopituitarism
• PaC02 > 50 mmHg
▪ No hypoglycaemia
TESTS
1. Pupils fixed and unresponsive to light
2. Absent corneal reflexes
3. Absent pain response in cranial nerve distribution
4. Absent gag reflex on endotracheal tube movement
5. Oculocephalic reflexes absent (no 'dolls' eyes' response)
6. Vestibulo-ocular reflexes absent (no nystagmus)
7. No spontaneous respirations after 10 minutes (patient ventilated on 100% oxygen at a rate of 4 breaths/min with a
tidal volume of 7 mL/kg). Arterial blood gases taken at 5 and 10 minutes.
BRAIN DEATH
Diagnosis to be made by two doctors independently including the intensive care consultant. Neither will be a member
of the transplant team where organ donation is considered.
Two groups of tests, preferably separated by 24 hours.
The results of examination must be recorded in the case notes or a suitable devised form.
YOUR TASK IS TO:
• Discuss the subject with him and respond to his queries.
The Performance Guidelines for Condition 059 can be found on page 325
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Candidate Information and Tasks
Condition 060
Breast biopsy concerns in a 20-year-old woman with a family
history of breast cancer
CANDIDATE INFORMATION AND TASKS
Your next patient for office consultation in a primary care community practice clinic is for review of a 20-year-old single
woman whom you saw four weeks ago with a complaint of cyclical mastalgia for the last six months. Physical
examination of the breasts was normal. She had no previous history of breast problems.
Her 50-year-old mother, also a patient of the clinic, had a Stage 1 breast cancer treated by mastectomy and axillary
dissection five years ago and is well on follow up.
You ordered an ultrasound of the breasts in this young woman, which showed an impalpable, focal well-circumscribed
solid parenchymal lesion in the right breast 1 cm in diameter consistent with a fibroadenoma.
You referred her to the female surgeon who treated her mother, who suggested an ultrasound-guided percutaneous
core biopsy to confirm the imaging diagnosis of benign fibroadenoma. The patient was also reassured that if this
showed, as expected, a benign lesion, surgery would not be required, and she could be observed clinically with
periodic ultrasound assessments.
The patient is unhappy with this advice and feels she would like the lump removed and has come back to you to
discuss this further. She is worried that the lump may be malignant or will become so, and feels that just taking a piece
of it will leave her still worried.
YOUR TASK IS TO:
• Discuss her concerns with her and advise her on the future management you would propose.
The Performance Guidelines for Condition 060 can be found on page 329
315
061
Candidate information and Tasks
Condition 061
An elbow injury in an 11-year-old schoolgirl
CANDIDATE INFORMATION AND TASKS
You are working in a hospital Emergency Department. Emily an 11-year-old schoolgirl, fell at school injuring
her right elbow which is swollen and painful. You arranged for X-rays which have been taken and are shown
below. You are interviewing Emily's mother after examining Emily and her X-rays. The elbow region was
swollen, painful and tender, with marked pain on attempted movement. There were no signs causing concern
on examination of the hands.
YOUR TASKS ARE TO:
•
Advise the parent regarding diagnosis and treatment.
•
Answer questions from the observing examiner near the end of the interview.
CONDITION 061. FIGURE 1.
CONDITION 061. FIGURE 2.
The Performance Guidelines for Condition 061 can be found on page 331
316
062
Candidate Information and Tasks
Condition 062
Sudden onset of chest pain and breathlessness in a 20-year-old woman
CANDIDATE INFORMATION AND TASKS
This young woman has presented to the Emergency Department of the local hospital with the
sudden onset of right sided chest pain and breathlessness while walking to work. She is
otherwise in good health and is a nonsmoker. Physical examination of the chest showed no
definite abnormality. Her breathlessness is less now. A chest X-ray has been taken, and is
illustrated below.
YOUR TASKS ARE TO:
•
Examine and interpret the patient's chest X-ray.
•
Explain to the patient the diagnosis and how she should be treated.
There is NO need to take any further history from the patient NOR repeat the physical
examination.
CONDITION 062. FIGURE 1.
The Performance Guidelines for Condition 062 can be found on page 334
317
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Candidate Information and Tasks
Condition 063
Atypical ureteric colic in a 25-year-old man
CANDIDATE INFORMATION AND TASKS
You are a medical officer in the hospital followup clinic. A few days ago your next patient, a
25-year-old driver, previously in good health, attended the Emergency Department with very
severe acute colicky mid-line lower abdominal pain. Abdominal examination was normal.
Because the patient's urine tested positive for blood, a diagnosis of atypical ureteric colic was
made. The pain was controlled by an injection of pethidine. A plain X-ray of the abdomen was
normal so an intravenous pyelogram (IVP) was arranged. The films are available for you to
review (see below), but a formal report from the radiologist has not yet been received.
The patient is seeing you today to find out the result of the IVP. He is now well and has been
straining his urine but no calculus has been found.
YOUR TASKS ARE TO:
•
Examine the IVP film, and give a commentary to the examiner.
•
Explain the X-ray findings to the patient.
•
Advise the patient about further management.
CONDITION 063. FIGURE 1.
Intravenous pyelogram
The Performance Guidelines for Condition 063 can be found on page 337
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Candidate Information and Tasks
Condition 064
Investigation for male factor infertility in a 25-year-old man
CANDIDATE INFORMATION AND TASKS
A married couple (husband 25, wife 23 years) have been trying to conceive for the last 12 months.
Examination of both the husband and the wife is normal. Investigations arranged by you, from a
general practice setting, have shown she is ovulating each month, and has patent Fallopian
tubes.
The husband's recent semen analysis is not normal. His result is as follows:
SEMEN ANALYSIS
Collected after three days of abstinence.
Examined 30 minutes after collection by masturbation, normal values in brackets
Volume 6 mL
Count 2 million/mL
Motility 20%
Velocity 20 microns/second
Abnormal morphology 95%
Antisperm antibodies nil
(2-6 mL)
(Greater than 20 million/mL)
(Greater than 40%)
(Greater than 30 microns/second)
(Less than 80%)
(Nil)
The husband has come to see you today for the result of the semen specimen. His wife is aware
of her results. She was unable to come today.
When you examined him previously, you found no abnormality on general or genital
examination. Both testes were normal in size (20 mL estimated volume), felt normal in
consistency, there was no indication of a varicocele or hydrocele.
YOUR TASKS ARE TO:
• Take a further relevant and focused history from the husband in regard to the results
obtained.
• Advise the husband regarding the couple's fertility problem. The
Performance Guidelines for Condition 064 can be found on page 340
319
2-C
Choice and Interpretation of
Investigations
2-C Choice and Interpretation of Investigations
Performance Guidelines
MCAT 058-064
58
Positive test tor hepatitis C in a 26-year-old woman
59
Diagnosis of 'brain death' prior to organ donation
60
Breast biopsy concerns in a 20-year-old woman with a family history of breast cancer
61
An elbow injury in an 11-year-old schoolgirl
62
Sudden onset of chest pain and breathlessness in a 20-year-old woman
63
Atypical ureteric colic in a 25-year-old man
64
Investigation for male factor infertility in a 25-year-old man
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Guidelines
Condition 058
Positive test for hepatitis C in a 26-year-old woman
AIMS OF STATION
To assess the ability of the candidate to take a focused history assessing the possible
mechanism for her becoming hepatitis C positive, and then to appropriately advise the patient in
regard to the mode of contracting the disease, the tests required to assess the current activity of
the disease, the likely long-term outcome, whether any treatment is likely to be helpful, the likely
possibility of transmitting the disease to other people, and the need for notification of the disease,
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
The candidate will be expected to take an appropriate history from you to determine how the
hepatitis C infection occurred, and whether you are likely to spread it to another individual. The
candidate will also be expected to provide you with information concerning the investigations
now required to assess any potential adverse effect of the hepatitis C virus on your body and
whether you have cleared the infection spontaneously. Advice concerning your subsequent
management will also be given and the need for notification of the disease to the local state
health department within five days.
The following history is likely to be sought from you
(give answers to specific questions as outlined below):
• Information in regard to likely cause of the hepatitis C infection
~ You were an intermittent intravenous drug-user over a two-year period, but last had
a 'shot' about six years ago.
~ On occasions you had shared needles with a friend.
~ You have never had a blood transfusion or given blood products
~ You have had two sexual partners in your life. The first relationship lasted three years
and the second, the current one, has lasted four years. You married your current
partner two years ago.
~ No family history of hepatitis of any sort.
~ No previous operations or illnesses.
~ No tattoos or body piercing
~ You work in a hospital as a cleaner.
~ You never had a needlestick injury
• You feel well, have a normal level of energy and no difficulties at work
• In response to any questions about symptoms (such as change in appetite, change in weight,
skin changes, abdominal discomfort, bowel function) reply that there have been no such
problems.
• Your alcohol intake is 1 or 2 glasses of wine a day.
• You are taking the oral contraceptive pill (Microgynon 30®) and wish to have a child in about
two years time.
• You have no past history of clinical hepatitis. You have never been jaundiced.
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•
After taking your history, the candidate should explain to you that the infection is likely to have occurred as
a result of your intravenous drug use.
•
You are likely to be advised that you need blood tests to define whether the infection has cleared
spontaneously from your body (polymerase chain reaction [PCR] test) and whether it has had any effect on
your liver function (liver function tests). Knowledge of these results will then determine what the
subsequent risks to you are.
Questions to ask if not already covered:
•
'Do I need to have any more tests?'
•
'Will I be able to have a baby?'
•
'Can anyone catch this infection from me?'
•
'Must you notify this to the health department?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
History taking should include:
•
Information in regard to the likely cause of the hepatitis C infection as outlined in instructions
to patient.
Current status
•
She has no current symptoms of liver disease: no tiredness, bruising, itch, appetite change,
abdominal discomfort, gastrointestinal bleeding, leg swelling.
•
Alcohol intake is moderate.
Investigations
Investigations required are those to assess any effect of hepatitis C on her liver, and whether the
actual viral infection has spontaneously cleared, (i.e. liver function tests and a polymerase chain
reaction test for hepatitis C virus [HCV PCR]).
In addition to the above tests, the possibility of blood group immunisation due to the use of
shared needles needs to be assessed by the indirect Coombs Test. If positive this will influence
the care required in a pregnancy.
Counselling
In counselling about hepatitis C and risk to the patient, the candidate is expected to know that
hepatitis C is a viral infection transmitted mainly via infected human blood. In most patients the
diagnosis is made only when the disease is established and chronic. In this patient, the exposure
was almost certainly at the time of intravenous drug use 6-8 years ago. In order to best identify
the risk of liver disease, LFTs and HCV PCR should be performed
•
An HCV PCR should be performed to help determine if the patient has spontaneously cleared
the infection.
•
In any patient, if serum alanine aminotransferase (ALT) is persistently normal (three
estimations over a six month period) the prognosis is good and it is likely no long-term
adverse liver effects will ever be found. In this patient if ALT is normal on the first test, given
the likely exposure was many years ago, the patient can be reassured, but further ALT
monitoring should still be advised.
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• If ALT is elevated, referral to a gastroenterologist would be appropriate for full liver assessment,
including biopsy, as antiviral therapy, including interferon and ribavirin, may be of use if there
is significant fibrosis in the biopsy specimen. Ultimately liver failure and liver transplantation
may be required in a small percentage of cases, and the patient is also at increased risk of
hepatocellular carcinoma.
When the above aspects have been sorted out, a decision can be made regarding the
advisability of a pregnancy. Pregnancy should not be allowed until at least 6 months has elapsed
after cessation of antiviral therapy, if this has been given, due to the teratogenicity of the ribavirin.
If pregnancy is to be allowed, the oral contraceptive pill should be ceased and the pregnancy
awaited. The chance of the baby being infected by vertical transmission during the pregnancy is
about 5% in patients who have a positive PCR for HCV.
Counselling about hepatitis C and risk to others
Prevention of infection of others can only be achieved by ensuring all people who come in
contact with her blood take appropriate precautions, and that the sharing of needles is never
done. There is no risk of hepatitis C transmission by hugging, kissing, casual contact, sharing
food or eating utensils. However it is important to avoid sharing objects with potential for blood
contamination, such as razors and toothbrushes. The risk of vertical transmission is very low.
There are no recommendations against breastfeeding. The risk of spreading this infection during
sexual activity is extremely low, and there is little or no evidence that condom usage will be of
value in protecting her husband from his very low risk of getting infected in this way. Hepatitis C is
a notifiable disease — notification is confidential.
Patient education
The good candidate will seek to provide the patient with appropriate supplementary patient
education material.
KEY ISSUES
• Taking a focused history in regard to determining the source of the infection.
• Advising the patient appropriately regarding subsequent care, the risk of liver pathology, and
the need to ensure blood transmission does not occur, as this would be likely to result in
hepatitis C infection in the recipient.
CRITICAL ERRORS
• Failure to recognise the need for LFT (ALT) assessments.
• Advising the patient of a benign course of disease in all instances.
COMMENTARY
Hepatitis C is a single stranded RNA virus. Risk factors for hepatitis C infection include intravenous drug use (70%), sexual exposure (-10%), blood transfusion (6%), occupational exposure
(3%), unknown (-10%). The risks of tattoos, body piercing and intranasal cocaine are not well
defined. The viral infection is established and chronic at the time of diagnosis in most patients. If
identified early, treatment with interferon within 3 to 6 months of infection can prevent chronicity
in 98% of patients.
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The natural history of hepatitis C infection is that 15-50% resolve completely with no adverse end result and normal
liver function (i.e. PCR is negative and liver function and ALT are normal). The remaining 50-75% will have chronic
infection (PCR positive). Twenty percent of those with an elevated ALT will develop cirrhosis, of which 1-5% will
develop hepatocellular carcinoma, and 20% will develop liver failure requiring transplantation. LFTs and HCV PCR
therefore need to be done to assign the patient to the appropriate group.
This station requires that the candidate has knowledge of the natural history of hepatitis C and how this infection is
detected, monitored and treated. Good communication skills are required to address sensitive issues in a situation
where the patient is likely to be very anxious, having just been informed about a potentially serious infection. The
station examines the ability of the candidate to take a focused medical history, relating to potential source of the
infection, and any effects on her health. The patient needs to be advised about the necessary investigations (blood
tests for HCV PCR and LFTs) and why these are required. Counselling skills are evaluated as the candidate talks with
the patient about the possible effects of the hepatitis C virus on her health and the potential of passing on the infection
to others. There is a good opportunity at this first consultation to establish a good rapport, to give some basic education
about hepatitis C. to provide some reassurance about transmission risk, and to set the scene for the next visit when the
ordered test results will be discussed. Candidates should be aware that hepatitis C is a notifiable disease with
confidentiality maintained.
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Performance Guidelines
Condition 059
Diagnosis of 'brain death' prior to organ donation
AIMS OF STATION
• To assess the candidate's knowledge of the principles of diagnosis of brain death and its
certification.
• To assess the candidate's communication skills in public education by discussing and explaining
aspects of cadaver organ donation in the context of brain death with a layperson.
EXAMINER INSTRUCTIONS
The standardised 'patient' in this instance is a secondary school science teacher with enquiries as
described. Responses and questions will depend upon the clarity of explanation and information
from the doctor.
Questions to be asked unless already covered:
• 'What does'brain death'mean?'
• What are these predetermined criteria about?'
• 'Can you explain these tests to me?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
You would expect the imminent medical graduate to understand clearly the principles, although not
necessarily the detail, of the diagnosis of brain death and its implications in gaining of consent for
cadaver organ donation as outlined in the commentary.
KEY ISSUES
• Ability to discuss principles of 'brain death' to a lay person.
• Ability to discuss principles of cadaveric organ donation for transplantation
CRITICAL ERROR - none defined
COMMENTARY
The candidate should be familiar with legislation in Australia (which is broadly similar to that
pertaining in most developed countries) providing for legal certification of death by either of two
methods:
• permanent and irreversible cessation of heart beat and loss of cardiac function; and
• permanent and irreversible loss of brain function
The concept of 'brain death', as an alternative to 'cardiac death' has important implications in
transplantation of organs and tissues from a cadaver donor. Removing organs once brain death
has been diagnosed and certified improves significantly the prospect of immediate function of the
organ graft in the recipient after revascularisation in its new host. Immediate graft function is
essential for successful heart and liver transplantation, and highly desirable in grafts of kidneys,
lung, pancreas, bowel and other tissues.
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Performance Guidelines
Removal of organs from the brain-dead, heart-beating cadaver with permanent and irreversible
apnoea (cessation of spontaneous breathing) due to brain stem death, whose respiration is
maintained by artificial mechanical ventilation of the lungs, minimises the critical time of 'warm'
ischaemia before cold perfusion of the removed organs. Thus, immediate function of the graft in
its new host can be anticipated provided total ischaemic times after organ removal do not exceed
the tolerated time periods for the individual organs — around 6 hours for hearts and up to 24-48
hours for liver, kidneys and other organs.
Clearly the diagnosis of irreversible and permanent loss of brain and brain stem function must be
an unequivocal and certain one, with absolutely no prospect of error. We need tests of absolute
specificity and sensitivity.
The several criteria and tests listed outline the ways of ensuring that irreversible loss of function
has occurred both in the higher cortical brain functions, and also in the functions of the brain
stem, where the respiratory centre and cranial nerve origins are clustered.
The criteria listed for diagnosis of brain death first require the appropriate clinical setting (usually
massive head injury or a catastrophic stroke), and the presence of deep and totally unresponsive
coma with permanent loss of function of the respiratory centre, so no spontaneous breathing can
occur because the brain stem centre for breathing has been irreversibly destroyed (and in the
absence of respiratory activity, cardiac arrest inevitably follows within 30 minutes or less unless
ventilation is restored by artificial ventilation).
The other criteria are the exclusion of other possible contributors to prolonged coma
(hypothermia, continuing central nervous system paralysis from drugs or curare-like respiratory
depressants, or gross metabolic and endocrine disturbances).
The tests then employed as listed in the criteria of brain death are diagnostic of destroyed and
absent brain stem reflexes, involving successively the midbrain, pons and medulla, so that loss of
brain stem function is progressively confirmed from above downwards, testing reflexes
subserved by cranial nerves 2 through 12 via their sensory and motor pathways, and the brain
stem reflex arcs from highest to lowest level.
Permanent irreversible apnoea (failure of spontaneous breathing) due to death of the respiratory
centre is confirmed over a 10-minute interval in the presence of a high level of build up of carbon
dioxide in the blood, which in the presence of a responsive respiratory centre will stimulate
spontaneous breathing.
Criteria for confirmation of findings is by two groups of tests separated by an appropriate period of
observation, and confirmed by two independent doctors, including a senior and experienced
clinician.
Meticulous application of these defined and universally accepted worldwide criteria has
ensured that brain death can be diagnosed clinically with absolute confidence and without
any risk of misdiagnosis.
Diagnosis of brain death is made by meticulous clinical observations and tests and does not
require elaborate technology for certainty of diagnosis.
The doctor here has been put on the spot by the bluntness and directness of the science
teacher's request. How should the request best be handled? It may be best initially to broaden the
discussion into a general outline of the usual setting of cadaver organ donation and the tragic
circumstances of sudden and unexpected death of a loved one highlighting the many sensitive
human, ethical and cultural issues which make empathie and
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compassionate communication between the treating and transplant medical teams and grieving
relatives and next of kin so essential. Certainly all doctors should be conversant with the laws
governing consent for donation given by the next of kin, but the request would come normally
from an experienced senior member of the intensive care team, and not from a junior Hospital
Medical Officer (HMO). Initial discussion with the candidate could then be followed by a
subsequent briefing in which the doctor could read up about the more specific details of diagnosis
of brain death and the science and ethics of cadaver organ transplantation before meeting the
teacher again.
This station is a rather extreme example of the increasingly common practice of patients
presenting to doctors with printed internet reports related to their presenting problem, often quite
detailed but not always appropriate in their perspective or application to the particular problem
posed by the patient.
In this instance, the isolated table the teacher brought was presumably taken from a larger
general account, which would be more relevant than the specifics of agonochemical events and
the specifics of tests used to diagnose permanent and irreversible death of the brain and brain
stem. The essential principle is that the criteria and tests provide the legal basis for medical
certification of the death of a person (because the brain is dead) even though other functions of
the body (heartbeat and machine-driven ventilation) are still going on with the support of
machines and transfusions so the person (who is now actually a cadaver) 'looks alive'.
Knowledgeable candidates should be able to give a general description, similar to the above, of
brain death. In particular, that:
• all the vital brain stem centres have been destroyed, including the respiratory centre and
consciousness centre, so the condition presents as a totally unresponsive individual with
permanent loss of consciousness, with permanent loss of the capacity to breathe:
• the various tests described are tests of these brain stem and higher functions to be certain that
all are permanently and irreversibly destroyed over a repeated period of observation: and
• all other potential influences on consciousness (like effects of drugs) have been eliminated
with certainty.
Doctors should also know that the condition of brain death, its certification and its legal and
ethical implications have been ratified by all major religions, and that the time of brain death is
seen by theologians to equate with the time at which the soul leaves the body. It is also important
to understand that brain death means death of the individual as surely as does recognition of
death by cessation of heartbeat.
Objections from next of kin to obtaining consent for organ donation after certification of brain
death are usually cultural and emotional and associated with fear of mutilation of the body.
The vegetative state comprises the condition of deep coma with present but ineffective
spontaneous breathing and with retention of other brain stem activities and reflexes, requiring
artificial feeding (and often respiratory assistance), and responding to a variety of stimuli. It is
NOT brain death. Knowledgeable candidates will stress this fact.
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Much confusion in the public mind was initially stimulated by misinformed or unsubstantiated, (but sensational)
reporting of doctors removing organs from struggling and responsive patients in whom brain death was said to be
wrongly diagnosed.
Doctors always need to employ great empathy and compassion in obtaining consent in indicating to the relatives of
the brain dead individual what organs are to be removed for transplantation, and in answering direct questions from
them in regard to these and other matters.
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Condition 060
Breast biopsy concerns in a 20-year-old woman with a family history of breast
cancer
AIMS OF STATION
To assess the candidate's counselling and educational skills in a patient with concerns
about familial breast cancer risk.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are very worried that this lump could be a cancer You feel it should be removed so
you don't have to worry about it anymore. If the doctor's reassurances are clear and
convincing, you are prepared to change your mind. If not, ask if you can have a second
surgical opinion
Opening statement:
'I think this lump should be removed'.
Questions to ask if not already covered:
• 'How can you be sure it's not a cancer?'
• 'Isn't it likely to turn into a cancer'?
• 'Can’t I just have it out and then forget about it?
EXPECTATIONS OF CANDIDATE PERFORMANCE
• Reassurance about likely benign diagnosis,
• Reassurance that impalpable fibroadenomas are very common in nonsymptomatic
women on imaging and do not reguire excision and that they are not cancers and
do not become cancerous.
• Reassurance that the biopsy takes several representative pieces and can save
unnecessary surgery and avoid potentially unsightly scarring.
• Reassurance that with a homogeneous lesion such as this, the biopsy could be relied
upon to give a definitive diagnosis.
• Sympathy for concerns of patient about cancer, and about continuing clinical and
ultrasound monitoring; reassurance of noninvasive nature of ultrasound monitoring:
reassurance of noninvasive nature of ultrasound
• Assurance that if patient is still concerned, the surgeon would be likely to accede to
her wishes, and if not, she could be referred for a second opinion.
• Whatever the patient decides, periodic followup with clinical and imaging reviews will
be advisable because of her family history and her concerns.
KEY ISSUES
• Counselling and communication skills in dealing with an anxious patient.
• Knowledge of pathology and natural history of breast fibroadenomas.
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CRITICAL ERROR - none d e f i n e d
COMMENTARY
The scenario illustrates a common problem. Breast cancer is very common in Australian women
and around 1 in 14 women will develop breast cancer in their lifetime. The risk is increased in the
presence of family history of breast cancer in first degree relatives, as is the case here.
This young patient requires regular clinical screening and appropriate imaging. The ultrasound
ordered by the family doctor was appropriate as initial investigation. Note that her original
problem (cyclical mastalgia) has now been replaced by the more serious problem of 'I have a
breast lump which could be cancerous' Her natural reaction (which might be the correct solution
to the problem) is 'I want it out.'
Benign impalpable (or palpable) fibroadenomas and other benign parenchymal lesions are very
common in this age group. We know from mass screening that benign lesions occur throughout
all stages of life, and that the natural history of fibroadenomas may be to remain unchanged, to
increase in size or to regress. No convincing evidence exists that benign fibroadenomas are
premalignant, and much collateral evidence on screening programme followup suggests that
they are not. Whether total excisional biopsy or partial core biopsy should be performed will
depend on circumstances, but an appropriate core biopsy would take five or more representative
samples and would be expected to give a definitively accurate diagnosis with minimal likelihood
of either a falsely negative or falsely positive result, and with minimal morbidity in experienced
hands. This lesion is impalpable and both clinical findings (normal breasts) and imaging findings
(typical ultrasound appearance of a benign lesion) already favour a benign fibroadenoma. But
these findings alone are no! enough, and pathological confirmation by biopsy is required
additionally to make our reassurance quite positive ('triple test check' — clinical, imaging, and
pathology all confirmed and negative for cancer). Pathology can be determined by fine needle
aspiration cytology (FNAC) or by percutaneous image-guided needle core biopsy. Choice will
depend on circumstances and availability of expert cytology and pathology services; but core
biopsy will give a tissue diagnosis and has higher sensitivity and specificity, so is generally
preferred.
If the 'triple test' is negative, the lesion is virtually certain to be benign. The patient will require
continuing periodic clinical and imaging review from her family doctor and surgeon. The
surgeon's advice was therefore appropriate and concise, but she has not convinced the patient
that it is the right plan. The utility of any advice regarding management is only relevant and
helpful if patient acceptance is present. If this patient remains unconvinced and unhappy, despite
repeated reinforcement by the family doctor, clearly the best decision may be to agree to her own
wishes that the lesion is removed. This will require an image-guided needle localisation
operation. It is unlikely that the surgeon would not agree to this, even though she (the surgeon)
correctly regards core biopsy and observation as the best option.
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Condition 061
An elbow injury in an 11-year-old schoolgirl
AIMS OF STATION
To assess the candidate's ability to identify a supracondylar humeral fracture on X-ray and advise
regarding treatment.
EXAMINER INSTRUCTIONS
The examiner will have instructed the parent as follows:
Your 11-year-old daughter, Emily, fell at school and now has a sore, painful swollen right elbow.
The candidate has finished examining your child and has examined the X-rays.
Opening statement and questions from the parent:
• 'Is the arm broken, doctor?'
• 'What treatment will she need?'
• 'What about school and writing?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate would be expected to advise the parent and describe the diagnosis, initial
treatment plan and followup in response to the questions along the following lines: (Expected
responses in parentheses)
• 'Is the arm broken?' (Yes. Emily has fractured the arm bone [humerus] just above the elbow.
There is minimal displacement and no complications. She should get excellent results with full
functional recovery).
• 'What treatment will she need?'(\Ne will apply a back slab/plaster/splint to the elbow with a
bandage and sling. No anaesthetic will be needed. Pain relief will be ensured by paracetamol
as required, dose for age. She will need to keep the elbow in plaster for several weeks [4-6
weeks] as illustrated. She will need a first followup tomorrow to check plaster and fingers, and
that she is comfortable with the plaster and sling. The parent should report earlier if hand or
fingers swell further. She should sleep
with arm supported on a pillow.
Subsequent unrestricted use of hand
and fingers should be encouraged with
self-maintenance finger stretches).
• 'What about school and writing?' (Can
write as soon as finger movements
allow this. Can return to school when
pain eases in a day or two).
CONDITION 061. FIGURE 3. X-ray
after application of backslab
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The examiner should ask the following question at seven minutes:
'What complication is most to be feared in these fractures if they are displaced?' (Vascular njury to the brachial artery).
KEY ISSUES
•
•
Recognition of fracture on X-ray.
Understanding principles and practice of management of an undisplaced uncomplicated closed supracondylar
fracture.
•
Understanding of potential complications in this type of fracture.
CRITICAL ERRORS
•
Missing the diagnosis of fracture
•
Failing to arrange appropriate review and followup.
•
Failure to know of risk of vascular complications in displaced supracondylar fractures.
COMMENTARY
Supracondylar humeral fractures are common in children following falls on the arm or hand. Undisplaced fractures or
those with minor displacements can be treated without need for reduction by immobilising the elbow using a padded
backslab or plaster (leaving shoulder and wrist and hand free to move) in the position of function of partial
elbow-flexion of around 100° flexion.
Severely displaced fractures will require reduction under anaesthesia and similar splintage after alignment is checked.
A serious complication to be watched for is injury to the brachial artery from the anteriorly displaced upper fragment,
giving ischaemia of the hand and fingers shown by pallor, insensitivity and absent radial pulse.
Unless circulation is clearly restored after reduction, such ischaemia must be treated by open exploration of the
fracture site and the injured artery with restoration of adequate blood flow by vascular surgery, otherwise Volkmann
ischaemic contracture of forearm muscles can occur.
Fortunately in the majority of cases, displacement is minor or alignment is readily corrected and no vascular
complications are present; but circulation must always be checked by review after 24 hours, and parents and patients
advised to report earlier if symptoms of numbness, finger swelling or severe hand pain occur.
Immobilisation is usually only needed in children for 4-6 weeks and active mobilising exercises then begin.
Emily would be expected to make a full functional recovery after this injury and did so as llustrated (Figure 4).
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Performance Guidelines
CONDITION 061. FIGURE 4.
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Performance Guidelines
Condition 062
Sudden onset of chest pain and breathlessness in a 20-year-old woman
AIMS OF STATION
To assess the candidate's ability to recognise the right-sided pneumothorax on the chest X-ray
and explain the diagnosis to the patient. The candidate needs to reassure the patient and then
explain how the problem will be managed.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You developed chest pain while walking to work. A chest X-ray has just been done at the local
hospital and you are about to be informed of the result of this.
Opening statement
•
'I've got a bit of a pain in my chest and I feel a bit breathless' — indicate site of pain which is
on the right below the clavicle and at the back in the same area.
You were walking to work when the pain came on suddenly. You were also breathless. The pain
is:
•
sharp and stabbing (if asked it is not tight, heavy or gripping);
•
not made worse with every breath
•
worse if you take a deep breath;
•
also radiating to your shoulder tip; and
•
moderately severe at onset, but easing now
You also have:
•
A feeling of breathlessness (not severe) at rest as well as on exertion.
•
An irritating dry cough - not severe or distressing
You are a nonsmoker and drink alcohol on social occasions only (2-4 standard drinks). You have
no known drug sensitivities. You live 2 km from the hospital and there are several others at home
most of the time.
Indicate area where pain is felt, upper chest, both back and front. Also indicate that you are
concerned about the cause of the pain and what the doctor will do to relieve it. Be cooperative
and answer the doctor's guestions without evasiveness
You have a moderate-sized pneumothorax, a partial collapse of the lung. The candidate must
make the correct diagnosis, explain it to you and how the problem will be managed Inserting a
catheter to take the free air out of the chest is a possible response, and admission to hospital
may be recommended. If so, ask if you could be treated at home.
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EXPECTATIONS OF CANDIDATE PERFORMANCE
Candidate should respond along the following lines:
Response to patient
• Pneumothorax is the diagnosis, confirmed by chest X-ray. A pneumothorax of this size may
not need active treatment. It would be prudent and reasonable to admit the patient overnight
for observation and serial X-ray. Sending the patient home if she lives nearby is a less
acceptable option with a pneumothorax of this size. Recurrence is possible after spontaneous
pneumothorax, and the recurrence rate is approximately 35% on the same side and 10-15%
on opposite side. Most recurrences occur within 12 months.
• The general consensus regarding the need for intercostal drainage is as follows:
~ If 25-30% or less lung collapse and no symptoms — observe. This is a reasonable option in
this patient.
~ If 25-30% or less lung collapse and persisting symptoms — drain. The patient may fall into
this category with observation. The pneumothorax is around 30% and her symptoms are
currently mild.
~ If greater than 30% collapse, whether symptomatic or not — drain.
Displaying clinical knowledge and skills
• Aetiology of pneumothorax — rupture of bleb on surface of lung.
• Nature of pain associated with pneumothorax — possibly due to tear of adhesion as lung
collapses.
• Associated breathlessness — depends on size of pneumothorax.
• Confirmatory investigation — chest X-ray diagnostic. This is a moderate (25-30%)
pneumothorax. It may need a formal chest drain. Inserting a catheter with a Heimlich valve is
an option to be discussed should the pneumothorax increase in size.
Demonstrating Communication skills
• Reassuring approach to patient anxious about the cause of the pain.
• The pain should be recognised as being of respiratory origin, rather than cardiac.
KEY ISSUES
• Correct interpretation of chest X-ray.
• Explaining the diagnosis and appropriate management to the patient.
CRITICAL ERROR
• Failure to identify the pneumothorax on the chest X-ray.
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COMMENTARY
Spontaneous pneumothorax is usually due to the rupture of a previously nonsymptomatic bleb
on the pleural surface of the lung. Symptoms of breathlessness and local discomfort are
proportional to the size of the pneumothorax which is often small, in which case no active
interventional treatment is required. Elective intercostal catheter drainage is indicated for a
large (> 30% chest volume) initial pneumothorax or progressive increase in size on serial
X-rays.
The common smaller size pneumothoraces are often difficult to identify on plain X-ray, even
with erect films and magnified views. Larger pneumothoraces, as illustrated, are usually easy to
identify.
CONDITION 062. FIGURE 2.
CONDITION 062. FIGURE 3.
CONDITION 062. FIGURE 4.
Examples of pneumothoraces and haemopneumothorax on plain X-ray (Figures 2,3) and
chest CT (Figure 4)
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Performance Guidelines
Condition 063
Atypical ureteric colic in a 25-year-old man
AIMS OF STATION
To assess the candidate's ability to interpret an X-ray of an intravenous pyelogram (IVP).
explain the findings to the patient, and give further advice about future management
to the patient.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a 25-year-old driver who has always kept in good health. A few days ago you
suddenly developed very severe lower abdominal pain for which you attended the
Emergency Department at this hospital. You were diagnosed as most probably having
a stone in one ureter (the tubes which connect the kidneys to the bladder). The pain
was relieved by an injection and has not returned. An X-ray of your kidneys was
arranged (IVP). You were told to strain your urine but so far nothing has been found.
Today you are attending the follow up clinic for the result of the X-ray.
Be yourself. Be more concerned about the kidney abnormality (which the candidate
should explain to you) than about the possibility of a stone in the ureter.
Questions to ask if not already covered:
• 'What does this mean for the future?'
• 'Why is my kidney in the wrong place?'— ask this if the candidate advises you that
your right kidney is not in its normal position.
• 'Is the stone still in there somewhere?'
• 'Will I get another stone?'
• 'Is this kidney likely to develop a cancer?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should in commentary to the examiner interpret the IVP appropriately
and indicate that the abnormality shown is a left-sided crossed fused ectopic kidney
with separate calyceal systems and ureters. This anomaly is obvious on the film. The
abnormal position of the right kidney must be described. There is no evidence of a
calculus in either ureter on the single film available
The candidate, in discussion with the patient, should:
• check and confirm that no stone has been found on straining the urine. Reassure
patient that on the X-ray there is no sign of any urinary calculus. Avoid alarming the
patient about the congenital renal abnormality.
• explain that the stone is likely to have been passed spontaneously. No need to strain
urine anymore. Ensure adequate fluid intake in future especially in hot weather.
Report further symptoms. Inform future medical attendants of the renal abnormality,
especially if suffering from an abdominal complaint. Estimation of serum calcium to
exclude hyperparathyroidism would be appropriate.
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•
Patient Counselling/Education — the abnormal position of the right kidney would explain the atypical nature of
the pain. Otherwise the renal abnormality is of no significance and needs no treatment except awareness of its
presence in the case of trauma to the left side of the abdomen or left sided abdominal pain.
The condition is congenital (present from birth) and variations in kidney position are quite common. The patient should
be reassured concerning the future, although warned that recurrence of renal/ureteric colic may occur if further stone
formation occurs.
KEY ISSUES
•
•
Interpretation of investigations — must identify abnormal position of right kidney on the X-ray.
Initial management plan — no further action required as stone has most likely passed,
•
Patient counselling/education — reassurance, explanation of renal abnormalities. Ensure patient awareness if
any future abdominal pain occurs.
CRITICAL ERROR
•
Failure to describe abnormal position of right kidney.
COMMENTARY
Although intravenous urography/pyelography (IVP) is now largely replaced by computed tomography (CT) when
scanning for suspected urinary calculi, in this case a urogram is used to assess the candidate's ability to interpret an
X-ray finding which is quite obvious if anatomical knowledge is sound.
Congenital anomalies of the kidney and its vascular and urinary drainage systems are relatively common: up to 10%
of infants may be born with some anomaly of the genitourinary system.
Unilateral renal agenesis (congenital absence of one kidney) occurs in about 1 in every 1000 births, and may be
accompanied in a male by the absence of the vas deferens on the affected side. In the female, uterine and vaginal
abnormalities commonly co-exist.
The kidney begins intrauterine development in the pelvis, ascending to its adult position on the posterior abdominal
wall by birth, and acquiring fresh blood supply from progressively higher blood vessels with exclusion of others as
differential growth of body segmental somites occurs.
Ectopic kidneys
One or both kidneys may be in an abnormal position. Most ectopic kidneys are pelvic in position, and may present as
a pelvic mass, or be felt on rectal or vaginal examination. An ectopic kidney may be on its own side, or on the side of
the normal kidney (crossed ectopia), and may be fused with the normal kidney or pelvic in site — as is this instance of
crossed fused renal ectopia. In 'pancake' kidney a single pelvic renal mass is served by two collecting systems and
ureters. Ectopic pelvic kidneys usually receive their blood supply from local vessels; the ureter of the displaced kidney
often crosses to its own side and opens into the bladder in the normal position.
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As kidneys ascend from the pelvis they normally remain separate. If they come into contact and adhere, a horseshoe
kidney may result, the kidneys being joined by an isthmus, which the ureters need to cross to descend.
Anomalies of the urinary collecting and drainage systems can predispose to urinary obstruction from hydronephrosis
or calculus.
Obstructive renal and ureteric pain (renal 'colic') is often an acute, constant and unremitting severe pain felt from the
site of the kidney towards bladder, penis and testis. An abnormal site of the kidney with anomalous referral of pain can
cause difficulties in diagnosis until functional imaging reveals the anomalous anatomy.
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Performance Guidelines
Condition 064
Investigation for male factor infertility in a 25-year-old man
AIMS OF STATION
To assess the candidate's ability to advise a husband with an abnormal semen specimen of the
subsequent evaluation and management required for the couple to best achieve a pregnancy.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
The doctor will generally be expected to advise you (the husband) of the significance of the
semen findings, what further evaluation is required, and what treatment is likely to be given in an
attempt to achieve a pregnancy. If there is no reversible factor present, and the semen analysis
does not improve with time it will be necessary for you and your wife to consider the place of
IVF, or the use of donor sperm not involving the use of IVF.
List of appropriate answers:
•
You are happy to have other tests done, or undertake treatment if this will lead to an
improvement in your semen specimen or achieve a pregnancy.
•
You work in an office writing computer programs for the banking industry.
•
You have had no contact with any chemicals.
•
You have had no surgery to your testes or inguinal region.
•
You have never had any testicular trauma.
•
You do not smoke and have 3-4 glasses of alcohol, usually wine, per week.
•
You are not on any drugs and have never taken any tablets except Panadol® when you have
a headache.
•
You have never used any drugs of addiction or hashish.
•
You have never used anabolic steroids.
•
You had mumps when aged 10 years There was no testicular involvement (give this latter
information only when specifically asked).
•
You have not had any viral illness, or high fever, nor were you given antibiotics over the last
three months (these could have resulted in the current semen specimen being abnormal).
•
You do not use saunas.
•
If asked whether you would accept the use of donor sperm to achieve a pregnancy in your
wife, indicate 'no'.
•
If asked whether you and your wife would accept the use of IVF to achieve a pregnancy,
indicate 'yes'.
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Performance Guidelines
Questions to ask unless already covered:
•
'Why is my test so bad?'
•
'Can't you do something to improve it?'
•
'If there are two million sperm present, why doesn t a pregnancy occur?”
• 'Will a change in my diet help?'
• 'Will IVF be required for all pregnancies my wife and I want?' Only ask this question if the candidate has already
discussed the use of IVF.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The history should cover the likely causes of the abnormal semen specimen, as detailed in the patient answers.
The candidate should advise along the following lines.
• One semen specimen is insufficient to make a meaningful prediction of fertility potential. Preferably three
specimens obtained about three months apart are required. If these show the same findings as the first
one, then clearly there is a problem which is almost certainly a major factor in the infertility.
• It is unlikely a cause of the abnormal semen specimen will be found.
• A number of blood tests should be performed to provide information as to the likely reversibility of the problem. This
would include at least the measurement of serum FSH and testosterone levels. If the FSH is high, spontaneous
improvement in the analysis is less likely.
• If the semen analysis improves spontaneously with time, the possibility of achieving a pregnancy is increased.
• There is no documented evidence for the use of hormone or other treatment, in improving the semen specimen,
• There is a definite place for the use of IVF, with intracytoplasmic sperm injection in the oocyte (ICSI). This has a
pregnancy rate of about 20-40%/cycle. IVF without the use of ICSI has poor results (about 2-5% pregnancy rate
per cycle of transfer).
• There is a place for the use of donor sperm and performing artificial insemination, if this had been acceptable.
Pregnancy rate is about 20% per cycle of insemination. Use of donor semen is cheaper and more straightforward
than other methods of treatment such as IVF, but the baby would not contain any of the husband's genetic material.
• Intrauterine insemination using his poor semen sample has a very poor success rate (about 1-2%
pregnancies/cycle of insemination).
KEY ISSUES
• Need for appropriate history from husband.
• Knowledge of appropriate tests to assess him, and of the possibility of improvement with time.
• Need for empathie counselling.
• Ability to understand that a definitive cause is unlikely to be found.
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CRITICAL ERRORS
•
Failure to advise that at least a second semen specimen (3 months after the first) must be examined.
•
Failure to recognise that persisting severe abnormality of the semen specimen as currently obtained will result in
a very low pregnancy rate.
•
Failure to understand that ICSI (within IVF) is the best method of achieving pregnancy using his genetic material.
COMMENTARY
In the advice to this young man, it must be recognised that a single sperm test is unreliable as a basis on which to
make a meaningful fertility prediction. This test must be repeated 2-3 months later and preferably again after a further
3 months. The comprehensive aspect of the counselling is based upon the assumption that a repeat specimen would
show a similar abnormality.
Common problems likely with candidate performance are:
•
Failure to repeat the semen specimen analysis a few months later (i.e. lack of understanding that one semen
analysis's result is of little predictive value).
•
Failure to ask questions to define the possible causes of the abnormal semen specimen.
•
Failure to ask whether the use of donor semen would be acceptable, as this is very effective and cheap, although
the child produced would not obtain DNA from the
husband
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2-D: The General Consultation
Barry P McGrath
'In the field of observation, chance favours the prepared mind.'
Louis Pasteur (1822-1895)
Objectives of the medical consultation — How I Do It'
The medical consultation is the cornerstone of medical practice. A properly conducted
consultation establishes an effective doctor-patient relationship. The consultation is the basis of
the diagnostic and treatment formulations, the vehicle for a patient's education about health
promotion, clinical problems, disease processes and test interpretations. It can also motivate a
patient to follow treatment recommendations. It is usually not a 'one-off encounter; the first
consultation is generally followed by further consultation visits at variable intervals which can
extend over many years. The following are the broad objectives of a medical consultation:
• Establish or build on an effective, professional doctor-patient relationship.
• Determine and evaluate the patient's physical and psychological symptoms.
• Identify abnormal physical and mental state signs.
• Define the clinical problem(s) — the patient's principal condition(s).
• Choose and interpret appropriate investigations.
• Reach the correct diagnosis (the doctor is progressively developing and testing hypotheses).
• Explain to the patient the nature of the condition, its physical, psychological and social
consequences.
• Reach agreement with the patient on a plan of management.
• Institute treatment.
• Arrange referral to other clinicians or
health workers appropriately.
• Devise methods of relieving pain and
suffering.
• Provide advice on health promotion.
• Reassure the worried well.
Some commonly encountered problems
during a clinical consultation are:
• failure to observe common courtesies;
• failure to establish levels of comprehension
and communication capabilities;
• ignoring emotional réponses and concerns;
• overuse of directed, closed questions;
• excessive use of leading or loaded
questions;
• vague or complex questions;
• using jargon;
• disjointed questioning;
• abrupt topic changes;
• lack of expressiveness in interviewer's
body language or voice;
• not discerning patient's ideas and beliefs
about the problem;
• narrowing the focus of enquiry too soon.
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2-D
The General Consultation
Setting the scene for a medical consultation
This may take place at any number of settings: general practice, Emergency Department,
hospital ward, outpatient/ambulatory care, and specialist consulting rooms. The goals of the
consultation will vary with the setting and the urgency of the clinical problem(s). Whatever the
setting, the doctor must respect the patient's safety, privacy, dignity, modesty, physical and
psychological well-being. Attention should be paid to the interview setting (for example, the
seating arrangement). Medical interviewers must be appropriately dressed, with a professional,
friendly demeanour and introduce themselves in a way that identifies their roles. The interviewer,
if a medical student or if not the patient's usual medical practitioner (for example, a trainee), will
need to seek the patient's permission to conduct the consultation.
Communication skills
First impressions, as in most human encounters, are very important. An expert medical
interviewer may adopt a variety of techniques, with an underlying self-questioning approach:
'How can I connect with this patient?' Frequently a patient will attend with a partner, family
member or friend. Establishing whether or not the patient wishes, or indeed, if it is appropriate, to
proceed to interview in the presence of 'a significant other' needs to be established early.
Depending on the circumstances, the interviewer may seek to conduct the medical consultation
with the patient alone initially and then subsequently involve the 'significant other' or family
members, but again only with the patient's permission.
Patient-related factors and doctor-related factors can influence doctor-patient communication.
It is critically important to establish, as soon as possible, if there are any impediments to
communication such as dementia, physical disability (such as deafness, blindness, stroke),
language or cultural attitude.
A skilled medical interviewer will exhibit:
•
an encouraging, warm and empathie manner;
•
nonjudgmental attitude;
•
good eye contact;
•
respect for patient's dignity, awareness of any discomfort;
•
alertness and responsiveness to nonverbal as well as verbal cues;
•
good listening skills;
•
use of mainly open questions; and
•
note-taking that does not interfere with patient rapport. Some
commonly encountered problems include:
•
failure to observe common courtesies:
•
failure to establish levels of comprehension and communication capabilities:
•
ignoring emotional responses and concerns;
•
overuse of directed, closed questions, excessive use of leading or loaded questions;
•
vague or complex questions;
•
using jargon;
•
disjointed questioning;
•
abrupt topic changes;
•
lack of expressiveness in interviewer's body language or voice;
•
not discerning patient's ideas and beliefs about the problem; and
•
narrowing the focus of enquiry too soon.
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2-0
The General Consultation
These issues relating to communication skills are vitally important and are re-emphasised here.
They are also addressed in a number of excellent text books and in many of the case
1,2,3,4
scenarios.
Clinical reasoning in medical history-taking
Clinical reasoning mostly involves an efficient, hypothetic-deductive process. The diagnosis is
often made early in the medical consultation. Usually a list of alternative hypotheses, or
differential diagnoses, are considered, ranked and further addressed Additional information is
obtained from the physical examination and specific investigations which serve to confirm the
diagnoses, determine their severity and effects and to exclude alternative (differential)
diagnoses. The following points are germane to the process of clinical reasoning:
• Iterative nature of process: the diagnostic hypothesis is continually being strengthened
refined, modified or totally reformulated on the basis of responses to questions.
• 80% of clinical diagnoses are reached on the basis of history alone.
• Clinical examination often provides confirmatory information; in some cases a new diagnosis
is defined.
• Investigations provide the diagnosis in only about 10% of instances.
The process of problem identification is summarised in the accompanying figure
SECTION 2-D. FIGURE 1.
Process of problem identification
1 MR Sanders, C Mitchell, GJA Byrne (eds). Me di cal C o ns ul ti n g Ski l l s-Beh avi o ur al an d I n te rp ers on al Di m e nsi o ns o f H eal t h C ar e
Addison Wesley Longman Australia Pty. Ltd. Melbourne Australia 1997.
2 SA Cole and J Bird (eds). Th e M edi c al I n ter vi ew — T he T hr e e-F u ncti on Ap p ro ac h . Mosby Inc. St Louis Missouri USA. 2000.
3 M Mloyd, R Boor (eds). Com m u ni ca ti o n Skil l s f or M e di ci ne . Churchill Livingstone. New York USA. 1996.
4 T h e Cl i ni cal Enco u nt er: A G ui d e t o th e Me di cal I n te rvi ew an d C as e Pr es en t ati on . Mosby Inc. St Louis Missouri 1999.
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2-D
The General Consultation
The structure of the medical history
This is usually arranged along the following lines:
•
basic information about the patient
•
the presenting complaint:
~ history of the presenting complaint
~ description of the presenting complaint:
- site
- severity/intensity
- quality/character
- time course
- setting/context
- aggravating and relieving factors
- associated features
-
•
risk factors
other medical problems:
~ related to presenting complaint
~ additional problems
•
medication, habits and allergies
•
systems review
•
past medical history
•
family history
•
social and personal history
•
psychiatric history
Barry P McGrath
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2-D
The General Consultation
2-D The General Consultation
Candidate Information and Tasks
MCAT 065-073
65
Acute chest pain in a 60-year-old man
66
Palpitations and dizziness in a 50-year-old man
67
Muscle weakness and urinary symptoms in a 60-year-old man
68
Aches and pains in a 62-year-old man
69
Lack of energy in a 56-year-old suntanned man
70
Recent haematemesis in a 50-year-old man
71
Anaemia in a 28-year-old pregnant woman
72
Acute vertigo in a 50-year-old man
73
Urinary frequency in a 60-year-old man
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065
Candidate Information and Tasks
Condition 065
Acute chest pain in a 60-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a hospital Emergency Department. You are asked to see a 60-year-old man
complaining of acute chest pain.
YOUR TASKS ARE TO:
•
Take a concise, relevant and focused history.
•
Present a summary of the patient's history for the examiner, who will then give you the
findings on physical examination which you request.
•
Tell the examiner your provisional diagnosis and the reasons for this.
•
Interpret the ECG to the examiner (the ECG will be given to you at about 7 minutes into
this consultation).
•
Institute emergency treatment.
CONDITION 065. FIGURE 1.
The Performance Guidelines for Condition 065 can be found on page 356
348
066
Candidate Information and Tasks
Condition 066
Palpitations and dizziness in a 50-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a hospital Emergency Department. You are asked to see a 50-year-old man
complaining of palpitations and dizziness over the past three days.
He has not seen a doctor for the past 10 years and at that last assessment he was told his blood
pressure was elevated. His current blood pressure is 150/96 mmHg.
The symptoms are still present when you see him to take his history. He is lying down on a trolley.
YOUR TASKS ARE TO:
• Take a concise, relevant and focused history.
• Present a summary of the patient's history to the examiner, who will then give you the
findings on physical examination.
• Tell the examiner your differential diagnosis.
• Interpret the ECG to the examiner (the ECG will be given to you by the examiner about 7
minutes into the consultation).
CONDITION 066. FIGURE 1.
The Performance Guidelines for Condition 066 can be found on page 363
349
067
Candidate Information and Tasks
Condition 067
Muscle weakness and urinary symptoms in a 60-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 60-year-old man who is complaining
of tiredness, weakness and urinary symptoms.
YOUR TASKS ARE TO:
•
Take a history from the patient.
•
Ask the examiner for the findings of a selective and focused physical examination you
would perform.
•
State to the examiner any relevant investigations you would order.
•
Briefly explain to the patient what you believe to be the cause of his symptoms and the
first step in management (you are not expected to discuss treatment in detail).
The Performance Guidelines for Condition 067 can be found on page 368
350
068
Candidate Information and Tasks
Condition 068
Aches and pains in a 62-year-old man
CANDIDATE INFORMATION AND TASKS
r
;
You are working in a general practice You next patient is retiree and aged 62 years. He s
consulting you about aches and pains, and you have just finished taking a history, which was as
follows:
Over the last six weeks, he has had a gradual onset of pain across the upper part of the back,
neck and shoulders which feel stiff. In the past week or so his hips are also feeling stiff and sore.
Since retirement two years ago he has been playing golf at least three times per week and
thought that he may have been overdoing it. At first the pain was just an aching feeling, but is
now more definite pain but hard to describe. It is continuous, worsened by movement and is
keeping him awake at night. The aching and stiffness is worse early in the morning and he finds
it difficult to get out of bed because of muscle weakness and pain which improves during the day.
Pain is not relieved by aspirin or Brufen®, nor worsened by coughing. There is no radiation to the
arms. Pain is felt in the muscles but not in the joints, although these feel stiff especially after
inactivity. He has not played golf for a week. He has noted a little difficulty in lifting himself up
from a chair. Muscles feel 'as if they are losing their strength'.
He has felt much more tired than usual over the last few weeks, especially after golf. His appetite
is not as good as usual. He thinks he may have lost a little weight and sometimes feels hot and
slightly sweaty at night in bed.
YOUR TASKS ARE TO:
• Specify to the examiner the essential features you would like to know from a focused physical
examination of this patient. The examiner will give you the results and ask you questions
about your provisional diagnosis and further investigations.
• Answer the questions put to you by the examiner.
• Advise the patient of your diagnostic and management plans.
You do not need to take any further history.
The Performance Guidelines for Condition 068 can be found on page 371
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069-070
Candidate Information and Tasks
Condition 069
Lack of energy in a 56-year-old suntanned man
CANDIDATE INFORMATION AND TASKS
You are consulting in a general practice setting in Melbourne, Victoria. Your next patient is a 56-year-old industrial
chemist. He is complaining of tiredness, although he has just returned from holidays in Queensland and appears quite
suntanned.
YOUR TASKS ARE TO:
•
Take a concise, relevant and focused history.
•
After four minutes, tell the examiner what would be the most significant clinical signs you would search for on
physical examination, including office laboratory tests. The examiner will respond with these findings for this
patient.
•
Advise the patient of your opinion about possible causes for his tiredness, and how you intend to proceed to
make a firm diagnosis.
The Performance Guidelines for Condition 069 can be found on page 374
Condition 070
Recent haematemesis in a 50-year-old man
CANDIDATE INFORMATION AND TASKS
You are an intern at the hospital Emergency Department. This 50-year-old patient has presented having had a
haematemesis of about 500 ml_ of fresh blood two hours ago, accompanied by a transient feeling of light headedness
and sweating.
The patient has given you a past history of a previous admission six months ago with a similar episode of
haematemesis which settled spontaneously. An endoscopy was done and the patient was told there were dilated
veins at the lower end of the gullet and was advised not to drink alcohol. The patient tells you that he has been trying
to give up alcohol with limited success.
On the basis of the history you have just finished taking, and his prior episode, you believe that the patient may have
had a haematemesis from oesophageal varices with portal hypertension and chronic liver disease as the explanation
for the current problem
YOUR TASKS ARE TO:
•
Perform a relevant and focused physical examination of the patient.
•
Explain your actions and what you are looking for to the examiner.
•
Describe your findings as you proceed.
You are not required to take any further history.
The Performance Guidelines for Condition 070 can be found on page 377
352
071-072
Candidate Information and Tasks
Condition 071
Anaemia in a 28-year-old pregnant woman CANDIDATE
INFORMATION AND TASKS
This 28-year-old pregnant woman, who is attending a general practice in which you work, has
just been found to have a haemoglobin level of 80 g/L when tested at 26 weeks of gestation.
YOUR TASKS ARE TO:
• Take any further relevant history you require.
• Ask the examiner about relevant findings likely to be evident on general and obstetric
examination.
• Advise the patient of the tests required to define the most likely diagnosis and the
subsequent management you would advise.
The Performance Guidelines for Condition 071 can be found on page 380
Condition 072
Acute vertigo in a 50-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a primary care facility attached to a teaching hospital. This 50-year-old man is
consulting you about intense dizziness. He is a previous patient who is overweight, and is on
medications for control of hypertension and hyperlipidaemia. He appears unwell and distressed,
with a slight drooping of the left eyelid. His wife drove him to the hospital.
YOUR TASKS ARE TO:
• Take a focused and relevant history.
• The observing examiner will then give you the significant findings on physical examination.
• Discuss your diagnosis and management plan with the examiner.
The Performance Guidelines for Condition 072 can be found on page 383
353
073
Candidate Information and Tasks
Condition 073
Urinary frequency in a 60-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. Your next patient is a 60-year-old man. He has attended
the practice infrequently in the past. Today he is consulting you about urinary symptoms.
YOUR TASKS ARE TO:
•
Take a focused history with regard to the presenting symptoms.
•
Give the examiner a summary of the patient's presenting history with the most likely
diagnosis.
•
Ask the examiner what aspects of physical examination are most likely to confirm this
diagnosis and any initial office tests you would perform. The examiner will respond
accordingly.
•
Tell the patient your diagnostic conclusions, what investigations are indicated and the
reasons for these.
The Performance Guidelines for Condition 073 can be found on page 394
354
2-D
The General Consultation
2-D The General Consultation
Performance Guidelines
MCAT 065-073
65
Acute chest pain in a 60-year-old man
66
Palpitations and dizziness in a 50-year-old man
67
Muscle weakness and urinary symptoms in a 60-year-old man
68
Aches and pains in a 62-year-old man
69
Lack of energy in a 56-year-old suntanned man
70
Recent haematemesis in a 50-year-old man
71
Anaemia in a 28-year-old pregnant woman
72
Acute vertigo in a 50-year-old man
73
Urinary frequency in a 60-year-old man
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Performance Guidelines
Condition 065
Acute chest pain in a 60-year-old man
AIMS OF STATION
To assess the candidate's ability to take a medical history in an older male patient presenting to
the Emergency Department with chest pain of two hours duration. The candidate needs to be
aware of the potential seriousness of the situation, the importance of taking a focused history to
distinguish between cardiac and non-cardiac sources of chest pain, whilst being aware of the
patient's discomfort and the need to take steps to relieve this. As in clinical practice, the early
performance of an ECG and its correct interpretation is a key step in the assessment of this
patient.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You have acute and worsening chest pain. You are 60 years of age.
Opening statement
'I have a very bad tightness in my chest.'
Characterisation of symptom:
Site:
central, retrosternal, radiating to lower jaw.
Severity: Time course:
severe 8/10
Context:
came on two hours ago, steadily getting worse
recent angina for two months; this pain started when playing
third set of tennis
Aggravating factors:
none, no association with respiration
Relieving factors:
anginine, oxygen when given in Emergency Department
Associated symptoms:
sweating, nausea, breathlessness
Other health problems:
Systems review:
Past history: Drugs:
overweight, diabetes (5 years); hypertension (3 years): high
cholesterol (3 years); pain in left leg on walking 500 metres (1 year).
central chest pain when walking on cold mornings for the past two
months: short of breath on exertion and breathless at night (three
days); tiredness (two days). No epigastric pain, oesophageal reflux
or dysphagia. Recent black bowel motions (five days). If no
questions about your bowels, volunteer this information.
Myocardial infarct three years ago
For blood pressure (enalapril/hydrochlorothiazide); diabetes
(metformin); aspirin; lipid-lowering agents
Habits:
Family History:
356
Smoker until three years ago; alcohol intake 1 glass wine per day.
Nil relevant.
065
Performance Guidelines
The examiner will provide physical examination findings to the candidate as follows:
He is an overweight man of stated age who is in acute distress with pain and who is anxious and sweating.
Blood pressure is 150/96 mmHg, pulse rate 96/min and regular. Heart sounds dual rhythm, no murmur.
There are no signs of heart failure. Examination otherwise noncontributory
EXPECTATIONS OF CANDIDATE PERFORMANCE
Approach to patient
The candidate is expected to demonstrate professionalism, empathy and to seek relief of the patient's
discomfort with use of oxygen whilst taking the history. Awareness of the potential seriousness of the situation
as the history evolves still requires the candidate to be calm, confident and reassuring.
History-taking skills
The candidate is expected to fully characterise the chest discomfort, its time course, the context and
associated symptoms. This needs to be done in a sensitive and focused way. using a mixture of open-ended
and direct questioning. The cardiovascular risk factors must be determined, including the past history of
myocardial infarction. The occurrence of this pain in the context of recent chest pain on exertion and
breathlessness needs to be defined.
If the history of recent 'black bowel motions' is not obtained by the candidate, the patient has been asked to
bring this to the candidate's attention.
What should the doctor be thinking?
Meeting the patient:
an overweight, anxious-looking, sweaty older man
with chest pain: urgent assessment needed: focus on key questions
relating to possibility of ischaemic heart disease.
The presenting problem:
fits pattern of acute myocardial infarction.
Check out his medication list:
indicates he is diabetic, hypertensive, high
Other cardiovascular risk factors:
previous acute myocardial infarction; claudication:
Other medical problems:
Type 2 diabetes; hypertension; central obesity;
Physical examination:
fits pattern of acute myocardial infarction
cholesterol.
smoker.
hypercholesterolaemia; probable melaena.
Treatment starts immediately:
This is a medical emergency requiring management
by an expert team (what is the candidate's role in the team?);
commence oxygen therapy, aspirin, glyceryl trinitrate and morphine;
monitor pulse, blood pressure. ECG; assess for thrombolytic
therapy.
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Performance Guidelines
Ability to provide a concise clinical summary
This should be along the following lines and reflect the manner in which a junior doctor would
describe the key features of the history to a registrar or consultant.
The patient is an overweight, anxious looking, sweaty 60-year-old man with chest pain
described as 'a very bad tightness', 8/10 severity, in the central, retrosternal region, radiating to
the lower jaw but not to the arms. The pain came on when playing tennis and has been
increasing steadily over the past 2 hours, associated with shortness of breath, sweating and
partly relieved by anginine and oxygen. In addition he has had exertional chest pain over the
past 2 months and shortness of breath, orthopnoea and tiredness over the past few days. A
concerning symptom is his 5 day history of passing black bowel motions, which is suggestive of
gastrointestinal blood loss.
He is at very high risk of acute coronary ischaemia, having had a prior myocardial infarct, and
with risk factors of diabetes, hypertension, high cholesterol. EC G findings need to be checked
and anaemia considered as a precipitating factor.
Diagnosis
The most likely diagnosis is acute myocardial infarction. The key features that suggest this
diagnosis are the characteristics of the chest discomfort in a patient with significant risk factors
and prior myocardial infarction.
Interpretation of ECG
The ECG shows the following features:
•
Sinus rhythm, rate 96/min.
•
There are features of acute inferior myocardial infarction shown by the Q waves in leads II,
III, AVF and ST segment elevation in these leads as well.
CONDITION 065. FIGURE 2.
ECG of patient
Tests: confirm acute myocardial infarction; assess anaemia
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Performance Guidelines
KEY ISSUES
• Approach to patient — sensitivity to the patient's discomfort and a calm and professional
manner.
• The ability to take an appropriate and focused medical history showing an awareness of the
likely causes of chest pain and the main characteristics that distinguish cardiac and
noncardiac sources of chest pain. The candidate needs to show an appreciation of
cardiovascular risk factors, and an efficient ability to characterise associated symptoms and to
define the context in which the symptom of chest pain has arisen.
• Commentary to examiner — a succinct summary which brings together the key features of the
presenting complaint, the context in which it has arisen, the associated symptoms and the
cardiovascular risk factors. The candidate should identify the potential significance of the
history of melaena.
• Diagnosis/Differential diagnosis — the candidate must consider the diagnosis of acute
myocardial infarction and why noncardiac causes of the chest pain are less likely.
• Interpretation of investigation — the most important findings on the 12-lead ECG must be
defined: sinus rhythm, acute inferior myocardial infarction.
CRITICAL ERRORS
• Failure to consider the diagnosis of acute myocardial infarction on the history.
• Failure to define the main cardiovascular risk factors — prior myocardial infarction. Type 2
diabetes mellitus, hypertension and hypercholesterolaemia, smoking.
• Failure to correctly interpret the ECG features of myocardial infarction.
COMMENTARY
1 2
The patient's presentation is highly suggestive of an acute myocardial infarction. Cardiovascular risk assessment
A prior history of a cardiovascular event is the most important pointer towards a recurrent event.
Type 2 diabetes mellitus is associated with a 10-fold increased risk of acute myocardial
ischaemia. For hypertension and hypercholesterolaemia and a history of smoking, the risk is
also significantly increased. 3 .4,5,6,7
1 Management ot unstable angina guidelines, http://www.heartfoundation.com.au/
2 Therapeutic Guidelines Cardiovascular Version 4 2003
3 Grundy SM, Pasternak R, Greenland P, Smith S, Fuster V. Assessment of cardiovascular risk by use of multiple-risk-factor assessment equations.
Ci rcul ati o n 1999, 100:1481-92.
4 MRC/BHF Heart Protection Study of cholesterol lowering with simvastatin in 20,536 high-risk individuals: a randomized placebo-controlled trial. Lancet
2002,360:7-22
5 Genuth S, Eastman R. Kahn R. Klein R, Lachin J, Lebovitz H, et al. Implications of the United Kingdom prospective diabetes study. Di a be tes C ar e
2003, 26 Suppl 1 : S28-32.
6 Neal B, MacMahon S. Chapman N. Effects of ACE inhibitors, calcium antagonists, and other blood-pressure-lowering drugs: results of prospectively
designed overviews of randomised trials. Blood Pressure Lowering Treatment Trialists' Collaboration. L anc et 2000. 356: 1955-64.
7 National
Health
Committee
revised
guidelines
for
smoking
cessation
2002.
Wellington:
National
Health
Committee;
2001.
http://www.heartfoundation.com.au
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Performance Guidelines
Acute coronary ischaemia syndromes
All the acute coronary syndromes share the underlying pathology of an atherosclerotic plaque
which becomes active acutely with rupture of the plaque with resultant platelet adhesion,
thrombosis, vasoconstriction and inflammation. The exact syndrome depends on the extent of
thrombosis, the degree of distal embolisation of platelet thrombi and the resultant myocardial
necrosis. When the thrombus that occurs on a ruptured plaque completely occludes the
coronary artery, the result is severe transmural myocardial ischaemia with ST elevation on the
ECG. This may cause sudden death from ventricular fibrillation. If the coronary occlusion is not
relieved, myocardial infarction develops progressively over the next 6-12 hours. This is often
associated with evolution of evidence of transmural myocardial infarction on the ECG as shown
by the development of Q waves.
The acute coronary syndromes are differentiated on the basis of extent and duration of chest
pain, ECG changes and biochemical markers. They are divided into two syndromes: (1)
associated with ST elevation on the ECG (ST elevation myocardial infarction, STEMI) and (2)
those without ST elevation (non-ST elevation myocardial infarction, NSTEMI) associated with
either ST depression, T-wave inversion or no changes on the ECG. NSTEMI is differentiated
from unstable angina on the basis of biochemical evidence of myocardial necrosis (elevated
troponin level).
The following figures give examples of different patterns of myocardial infarction:
CONDITION 065. FIGURE 3.
Acute anterolateral myocardial infarction
Features indicating acute anterolateral infarction are:
•
ST elevation in leads I, aVL, V2-V6; and
•
Q waves in aVL, V2, V3 and loss of R waves across chest leads.
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CONDITION 065. FIGURE 4.
Acute inferior myocardial infarction
Features of acute inferior myocardial ischaemia/infarction are:
• ST segment elevation in II, III, and aVL; and
• The slow rate is also common in this condition.
CONDITION 066. FIGURE 5.
Acute posterior-inferior myocardial infarction
Features of posterior-inferior myocardial infarction are:
• Q wave and ST elevation in inferior leads (II, III, aVF); and
• the prominent R waves in V1 (labelled C1) and Q waves with ST elevation in
V5, V6 indicate postero-lateral infarction.
361
Central chest discomfort is a common presentation of cardiac disease, but it may also be due to
disease of the gastrointestinal tract, lungs or a musculoskeletal disorder. The features of the
chest discomfort/pain, the context in which the symptom occurs, the associated symptoms and
the patient's predisposition to cardiac versus noncardiac disease based on an assessment of
cardiovascular risk factors, must all be considered.
In taking a history relating to chest discomfort, a number of key descriptors needs to be defined
to determine if its origin is cardiac ischaemia. A common sequence of enquiry would be as
follows:
•
'What is the discomfort like? Describe it in your own words. '
•
'How severe is it — e.g. a score out of 10?'
•
'Show me where you feel it? Does it go anywhere else — the abdomen, the back, the neck,
the jaw, the arms?'
•
'When did it start? How has it progressed? How long has it been present or how long did it
•
'Does anything make the discomfort worse? Does anything make it better?'
last?'
•
'Do you have any other symptoms? Shortness of breath? Dizziness? Palpitations?
Sweating? Nausea or vomiting?'
In addition there are a number of questions that will be used in trying to determine if there is a
non-cardiac cause:
•
•
•
•
'Do you get acid indigestion or reflux?'
'Was the onset of the discomfort related to a meal?'
'Does it hurt to take a deep breath?'
'Is the chest sore to touch?'
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Performance Guidelines
Condition 066
Palpitations and dizziness in a 50-year-old man
AIMS OF STATION
To assess the candidate's ability to take a medical history in a patient presenting to the
Emergency Department with episodes of palpitations and dizziness. Careful history-taking is
essential in assessing such patients. The candidate needs to define the attacks, the nature of the
arrhythmia (rate, rhythm, onset, offset, context) and the close association between the two
symptoms. Also critical to the assessment is an understanding of potential risk factors and
précipitants of cardiac arrhythmias. Underpinning the history-taking, the candidate needs to
have knowledge of the causes of cardiac arrhythmias and the manifestations of different types of
arrhythmias.
Obtaining an ECG during an attack and its correct interpretation is a key step in the assessment
of this patient.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are lying on a trolley in the Emergency Department. You were brought to hospital by
ambulance.
Opening statement
'I've been getting attacks of palpitations and dizziness over the past three days. '
In response to specific questioning, provide the following information:
• History of presenting complaints — The palpitations and dizziness seem to come on together.
You have them now.
• Palpitations - These are described as a fast beating of the heart going into the neck. If asked to
tap out the rhythm on the desk, give a rapid regular beat of about 150/min. There have been
four attacks over the past three days, each lasting for about two hours. The attacks come on
suddenly and stop suddenly. Three of the episodes occurred after the evening meal and the
fourth whilst driving. Nothing you have tried seems to stop the attack. There is no associated
chest pain but you are mildly short of breath and sweat during and for a short time after each
attack. There is no flushing, headache or nausea.
• Dizziness — This is a light-headed, near fainting experience which comes on within a minute of
the palpitations and lasts for the duration of the attack. You feel you have to lie down.
• Systems review There is no history of heat intolerance, nervousness or tremor. You are
overweight with no recent change in weight. Bowel function is normal.
• Habits — You smoke 20 cigarettes per day; drink 4 or 5 glasses of wine with the evening meal
and 5 cups of coffee per day. You are on no medications.
• Social history — You have a sedentary solitary lifestyle. Your job is stressful as a company
secretary and the company you work for is restructuring.
• Family history — No significant family history of heart disease or cardiac arrhythmias.
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EXPECTATIONS OF CANDIDATE PERFORMANCE
•
Approach to patient
The candidate is expected to demonstrate professionalism, empathy and good communication skills.
•
History-taking skills
The candidate is required to carefully define the two symptoms and how they relate. The specific features of the
palpitations, the context in which they occur, the potential risk factors and précipitants are all important elements of
this patient's history. In addition the candidate is expected to explore possible underlying cardiac diseases, in this
case particularly the possibilities of hypertensive heart disease or alcoholic cardiomyopathy.
•
Ability to provide a concise clinical summary
This should be along the following lines and reflect the manner in which a junior doctor would describe the key
features of the history to a registrar or consultant.
'The patient is a 50-year-old company secretary who presents with his fourth attack of palpitations and dizziness over
the past 3 days. Three of the attacks have occurred in the evenings after his meal and one whilst driving. Each attack
lasts approximately 2 hours, they come on suddenly and stop suddenly and the dizziness, which he describes as a
near-fainting experience, always accompanies the palpitations. The nature of the palpitations is that they appear to
be rapid, approximately 150/min and regular. He is currently experiencing an attack. The attacks are also associated
with shortness of breath and sweating, but no chest pain.
Considering possible underlying causes for his attacks, he has a history of high blood pressure but no known cardiac
disease. He has a high alcohol intake and has recently been under stress at work. He is also at risk of ischaemic heart
disease because of his smoking, obesity and sedentary lifestyle. There is no evidence on history to suggest
thyrotoxicosis. '
The examiner will provide physical examination findings to the candidate as follows:
Physical examination
He is an overweight, anxious man in some distress while sitting or lying on a couch. Pulse is 150/min and regular,
blood pressure is 150/96 mmHg. Heart sounds show dual rhythm with no bruits and are synchronous with the
pulse. There are no signs of cardiac failure. Examination otherwise is noncontnbutory
•
Diagnosis
The most likely diagnosis is paroxysmal atrial arrhythmia, probably atrial flutter. The key features that suggest this
diagnosis are the sudden onset and offset, the rapid, regular palpitations and the rate. The potential causes for this
arrhythmia are hypertensive heart disease, alcoholic cardiomyopathy, ischaemic heart disease or occult
thyrotoxicosis.
The differential diagnosis includes atrial fibrillation, supraventricular tachycardia, ventricular tachycardia.
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• Interpretation of ECG
The ECG shows the following features:
CONDITION 066. FIGURE 2. Atrial
flutter with variable block
KEY ISSUES
• Approach to patient — Sensitivity to the patient's discomfort and a calm and professional
manner.
• History — The ability to take an appropriate and focused medical history with careful definition
of the symptom characteristics and showing an awareness of the likely causes and
précipitants of cardiac arrhythmias.
• Commentary to examiner — This needs to be a succinct summary which brings together the
key features of the presenting complaint, the context in which it has arisen, the associated
symptoms and the arrhythmia risk factors.
• Diagnosis/Differential diagnosis — The candidate must consider the diagnosis of atrial
arrhythmia and the potential contributions of hypertension and alcohol.
• Interpretation of investigation — The most important findings on the 12-lead ECG must be
defined: atrial flutter with variable block.
CRITICAL ERRORS
• Failure to consider the diagnosis of atrial tachyarrhythmia on the history.
• Failure to correctly interpret the ECG features of atrial flutter.
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COMMENTARY1 2 3
Palpitations are the symptom of an abnormal awareness of heart rate. They may be due to a
change in the rate, rhythm or force of the heartbeats or some combination of these. It is important
to ask the patient to tap out with a finger what is noticed when the palpitations arise. Anxious
patients may be aware of their normal heartbeat. Isolated forceful beats ('thump in the chest') are
usually caused by ectopic beats. Patients may also report their heart 'misses a beat', usually due
either to a compensatory pause after a ventricular ectopic beat or a nonforceful ectopic beat.
Awareness of a fast heart rate usually occurs when this is of recent origin. It is important to
determine whether this is regular or irregular and whether there are any associated symptoms.
The development of symptoms in a patient with an atrial arrhythmia will depend on the rate, the
rhythm, underlying cardiac disease and patient characteristics. A common problem encountered
in older patients with hypertensive heart disease who develop atrial fibrillation is that the
presence of a poorly compliant (stiff) left ventricle renders them quite intolerant to this arrhythmia,
where there is loss of the contribution of atrial contraction to ventricular filling, leading to left heart
failure.
Atrial flutter usually presents with 2:1 atrioventricular block and a regular ventricular rate of
150/min. It is often misdiagnosed as supraventricular tachycardia. Rarely conduction occurs 1:1,
giving a ventricular rate of 300/min and severe symptoms. Much more frequently greater degrees
of AV block are present giving ventricular rates of 100 (3:1 block) or 75 (4:1 block). Patients may
be asymptomatic except when the rate changes (e.g. from 4:1 to 2:1 block). An example of atrial
flutter with 4:1 block is seen in the figure below (Figure 3). Note the characteristic saw-tooth
appearance of the P waves.
CONDITION 066. FIGURE
3.
Atrial flutter with 4:1 block
In untreated patients with a normal AV node, atrial fibrillation (AF) usually presents with an
irregular ventricular rate of 160-180/min. Older patients with impaired AV conduction can often
present with lower rates. Apart from the first episode, where the natural history is not clear, atrial
fibrillation tends to fall into one of three clinical patterns (the so-called 'three Ps'). Patients may
progress from one to another. These patterns are:
•
Paroxysmal AF (episodes which come on suddenly and usually revert spontaneously within 48
hours);
•
Persistent AF (episodes persist for days or weeks unless active measures are taken to revert
to sinus rhythm); and
1
2
Therapeutic Guidelines Cardiovascular Version 4 2003.
Wyse DG. Waldo AL, DiMarco JP, Domanski MJ, Rosenberg Y. Schron EB, et al. A comparison of rate control and rhythm control in patients with
atrial fibrillation. N ew E n g l and J o ur n al o f Me di c i ne 2002, 347: 1825-33.
3
Hankey GJ. Non-valvular arial fibrillation and stroke prevention. M e di cal Jo urn al o f Austr al i a 2001. 274: 234-39.
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• Permanent AF (inability to sustain sinus rhythm for any length of time or decision made not to try to revert the rhythm).
Patients with persistent and paroxysmal AF have at least the same risk of thromboembolism as patients with
permanent AF. An example of atrial fibrillation is illustrated (Figure 4). Note that the rhythm is irregularly irregular and
that no P waves can be seen.
CONDITION 066. FIGURE 4. Atrial
fibrillation
It is important to identify and manage underlying causes of atrial tachyarrhythmias (for example, hypertension,
thyrotoxicosis, heart failure, mitral valve disease, atrial septal defect).
Treatment of these two common arrhythmias needs to be considered under two headings: treatment of the arrhythmia
itself and prophylaxis against thromboembolic complications. The pharmacotherapeutic approaches to atrial fibrillation
and flutter are very similar, however atrial flutter commonly responds very easily to a low energy direct current shock or to
pace cardioversion and is often relatively insensitive to antiarrhythmic drugs.
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Performance Guidelines
Condition 067
Muscle weakness and urinary symptoms in a 60-year-old man
AIMS OF STATION
To assess the candidate's ability to take a focused history regarding muscle weakness,
symptoms of prostatism and the patient's concerns about their cause, while also being aware of
the possibility of an adverse drug reaction. The candidate should know the essential
components of a selective physical examination and essential investigations to confirm the
diagnosis and exclude other conditions.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows
You are a 54-year-old newsagent.
Opening statement
'I'm feeling weak and tired which is not like me. I'm also ha ving trouble with my
waterworks. '
Follow this, if not interrupted by direct questioning, by telling the doctor that:
•
Symptoms have only developed over the last six months or so.
•
You have felt tired and have noted a feeling of weakness in your muscles over the past few
weeks. This is not constant and not severe. All your muscles seem to be affected. It gets
worse towards the end of the day and you have attributed this to tiredness (long working
hours) and increasing age. You have also had some cramps in your calf muscles.
•
Over the last six months you have also felt an increasingly strong urge to pass urine when
standing up after sitting (e.g. on getting out of your car or after watching TV for an hour or so).
You also have had to pass urine more frequently at night. Some nights you have to get up at
three or four times and then have trouble in starting the passage of urine.
In response to appropriate questioning:
•
The stream of urine is poor and you find it hard to finish, with annoying dribbling. So far you
have not lost control or soiled yourself. Passing urine is not painful. The urine does not smell
abnormally. Sexual intercourse and ejaculation are not affected except for reduced
frequency in recent years. You have learnt to empty your bladder before going out or sitting
for long periods. You think that reduction in the amount of beer you drink after work from 4 to
5 glasses to 1 or 2 has helped.
•
You have always kept in good health.
•
Other body systems are normal. In particular, no cardiovascular or other neurological
symptoms and no related symptoms such as tremor or stiffness. No weight loss.
Other significant information:
•
•
You commenced treatment for 'mild blood pressure' about eight months ago. but from a
different doctor. Your medication is hydrochlorothiazide 25 mg (Dithiazide®) each morning.
You are on your feet all day in the newsagency. You still play tennis on Sunday but the power
in your game has 'gone'. No marital, family or financial problems.
If asked about your past history, family history, habits or social history, respond as for
yourself.
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• You are very puzzled by your muscle weakness. You are also concerned about the urinary symptoms and worried
that you could have prostate cancer. You have also thought of the possibility that your symptoms might be caused by
your medication.
• The doctor may not seek all this information. If asked other questions, respond as for yourself.
• After obtaining the results of the investigations from the examiner, the candidate will briefly explain the cause of your
symptoms to you. Do not question the doctor, simply accept what is said.
EXPECTATIONS OF CANDIDATE PERFORMANCE
• Approach to patient
~ Use of appropriate communication skills to define the salient points of the history.
• History
~ Identification of muscular weakness, cramps, urinary frequency, urgency and dribbling and medication (for
hypertension — use of thiazide diuretic should be elicited). Patient concern about cancer should be recognised.
• Physical examination
~ The candidate should ask the examiner for certain findings based on diagnostic possibilities suggested by the
history. Results will be provided for specific requests as follows:
CONDITION 067. TABLE 1.
Examination findings
General appearance
Pallor
looks well
absent
Pulse
72/min regular
Blood pressure
lying 154/92 mmHg and standing 148/90 mmHg
Heart
normal
Abdomen
normal
Neurological examination (limited)
power of limbs
possibly slightly reduced
tone
normal
reflexes
normal
sensation
normal
PR —the prostate is enlarged. Features which should be sought:
degree of enlargement
both lobes
consistency
moderate
yes
firm but not hard
tenderness
surface
no
smooth
nodularity/induration
no
Urine office testing — normal on chemical testing
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•
The following investigations should be suggested:
~ Serum potassium
~ Haemoglobin and full blood examination
~ Prostate specific antigen (PSA)
~ Microscopy and culture of midstream urine
Explanation to patient
~ How low potassium due to use of a diuretic tablet for treatment of elevated blood pressure
could be the cause of the weakness. Effects are fully reversible.
~ Enlargement of prostate is the cause of the urinary symptoms. Reassure that malignancy
is very unlikely but that referral to a urologist is advisable for probable operative
treatment, which will include examination of tissue for cancer cells.
~ Cease Dithiazide® and perform followup checks of blood pressure for further
management.
KEY ISSUES
•
History-taking to identify weakness, prostatism, fear of cancer, current medication.
•
Examination for pallor, pulse and BP, heart, abdomen, neurological (limited), rectal
examination.
•
Investigations including serum electrolytes and creatinine, PSA, FBE, ECG. urine
microscopy and culture and cytology.
•
Explanation to patient that the likely diagnosis is hypokalaemia (reversible) as the cause of
muscle weakness together with benign prostatomegaly. Reassure the patient regarding
cancer.
CRITICAL ERRORS
•
Failure to do rectal examination.
•
Failure to suggest appropriate investigations.
COMMENTARY
Muscle weakness and fatigue are common symptoms with multiple aetiologies.
In this scenario the first dominant cue is the association of tiredness and weakness with urinary
symptoms. These latter symptoms and the signs of benign prostatic enlargement suggest
bladderneck obstruction requiring further investigation and referral.
The other dominant cue is picked up by systems review giving the information that the patient
has been on a thiazide diuretic for eight months, and his symptoms of musde weakness began
after starting this medication.
The diuretic polyuria may have brought to light previously nonsymptomatic prostatic pathology,
and caused potassium loss. Even so-called potassium-sparing thiazide diuretics can be
associated with potassium depletion, which could be contributing to his muscle weakness and
muscle cramps through hypokalaemia.
Investigations of serum electrolytes (particularly potassium levels), renal function tests, urine
cytology and culture, and full blood examination would be mandatory in a patient of this age with
symptoms as described.
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Condition 068
Aches and pains in a 62-year-old man
AIMS OF STATION
To assess the candidate's knowledge of the clinical presentation of polymyalgia rheumatica and
the way in which this diagnosis is confirmed or excluded.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a retired office worker and will be advised by the candidate of the diagnostic and
management plans.
EXPECTATIONS OF CANDIDATE PERFORMANCE
Physical examination findings to be sought:
• Essential features of focused physical examination to be given to candidate on
request by the examiner.
~ Temperature
~ Pulse
~ Blood pressure
37 °C, normal
70/min regular
140/80 mmHg
~ Muscle groups of neck, trunk, upper and lower limbs should be examined.
- Active movement of neck, shoulder and trunk muscles causes discomfort.
- Normal power and tone and coordination of movements.
- Examination of joints, particularly hands, shoulders, neck, sacroiliac joints and hips.
These show no abnormalities and a full range of movement.
~ Examination of lymph nodes, abdomen, and respiratory systems is expected to exclude any
medical conditions that could possibly give rise to this constellation of symptoms (e.g.
lymphoma, carcinoma) — normal findings.
~ Rectal examination to check prostate — normal.
After providing results of physicai examination, the examiner will ask the candidate
• 'What is your provisional diagnosis and differential diagnosis?'
• 'What further tests will you advise?'
• 'Please now give to the patient your diagnostic and management plans. '
Diagnosis/Differential diagnosis
Polymyalgia rheumatica should be suspected from the history. The examination does not reveal
any specific diagnostic features but erythrocyte sedimentation rate (ESR) or C-reactive protein
(CRP) would be expected to confirm the diagnosis. Underlying malignancy should be a
consideration.
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Management
The candidate is expected to indicate to the patient that if the blood tests confirm the suspected diagnosis of
polymyalgia rheumatica, then the patient is likely to have a good response to a limited course of prednisolone which
may need to be given for up to two years, but that any such treatment, how it is given and monitored, must await the
results of the tests. The patient should be advised to report any severe headaches, visual disturbance or pain in the
jaw when eating, since giant cell arteritis can occur together with polymyalgia rheumatica.
KEY ISSUES
•
Focused physical examination which must include musculoskeletal system plus rectal examination.
•
Investigate with ESR and/or CRP.
•
Polymyalgia rheumatica as the most likely diagnosis.
CRITICAL ERROR
•
Failure to request ESR and/or C-reactive protein.
COMMENTARY
Polymyalgia rheumatica and giant cell arteritis are linked conditions of unknown aetiology. The incidence varies with
ethnicity and these conditions are more common in people of Northern European descent.
Polymyalgia rheumatica commonly presents in middle aged or elderly patients with diffuse symptoms of muscle pain
particularly in the neck, shoulders and hip girdles. The myalgia is symmetric and often begins in the shoulders.
Muscle strength is normal but can appear diminished because of pain. There is often a disparity between the severity
of myalgia reported and the physical findings. There are often constitutional symptoms including weight loss, malaise
and depression; spiking fevers are rare. The diagnosis in this instance would be confirmed by investigations,
specifically ESR and C-reactive protein, and full blood examination (FBE).
•
Treatment of polymyalgia rheumatica is with oral prednisolone, initially in high dosage.
•
Differential diagnosis to be considered would include:
~ Chronic fatigue syndrome: This condition is a 'medically unexplained condition'. It is usually seen in younger
patients, may follow a viral infection and the dominant feature is incapacitating fatigue with other medical
symptoms of subjective memory impairment, headaches, poor sleep, generalised muscle pains,
postexertional malaise lasting more than 24 hours, lymph node tenderness. It is best viewed as a symptom
complex resulting from interaction of physical and psychosocial factors. The ESR, CRP and FBE tests are
normal.
~ 'Fibromyalgia': Another of the 'medically unexplained' conditions, characterised by aching pains across the
shoulders and upper back, skin tenderness, poor sleep pattern and often additional constitutional symptoms.
ESR, CRP and FBE are normal.
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~ Polymyositis: This is an uncommon inflammatory muscle disorder that may be associated
with an underlying neoplasm in older patients. The most frequently encountered mode of
presentation is the onset of painful muscles and proximal muscle weakness, often
commencing in the neck, shoulder girdle and proximal limb muscles, associated with some
atrophy with disproportionate weakness. ESR. CRP and FBE abnormalities may be
indistinguishable from polymyalgia rheumatica but elevated creatine kinase and abnormal
autoantibodies are characteristic. A positive muscle biopsy is diagnostic.
~ Underlying malignancy: prostate, breast in females, multiple myeloma, lung cancer.
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Condition 069
Lack of energy in a 56-year-old suntanned man
AIMS OF STATION
To assess the candidate's ability to diagnose the cause of tiredness and lack of energy in a 56-year-old man.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a 56-year-old industrial chemist.
Opening statement
'I have felt very tired lately and for no apparent reason. '
Story in Detail
Without prompting — you have felt tired and lethargic since you retired about a year ago You attributed this to a lack
of mental stimulation from what was a demanding job. About three or four months ago you also noticed aches and
pains in your joints which have persisted. You also realised that you had lost some weight which is why you decided
to see the doctor. You have just returned from holidays in Queensland. You have noticed that you have developed a
suntan even though you don't spend much time outdoors, and did not do much swimming on holiday.
In response to specific questions respond as indicated:
•
The tiredness is constant and not improved by resting or sleeping (you sleep well).
•
The aches and pains are mainly in your shoulders, hips and knees. There is some tenderness and swelling in
wrists and elbows and pains in the shoulders. The muscles are not sore.
•
The weight loss is 3-4 kg.
•
You have also noticed palpitations at times — mainly when going off to sleep, when your heart seems to speed
up and miss beats for a few minutes at a time.
•
Your sexual activity has been less than before; you thought due to your age.
•
You don't feel depressed
•
In response to all other questions deny any other symptoms.
•
You do not smoke or drink any alcohol.
•
There have been no significant past illnesses.
•
There is no significant family history but you were adopted and know little about your
parents.
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EXPECTATIONS OF CANDIDATE PERFORMANCE
• Approach to patient — The candidate should show skill in:
~ listening and facilitation of presenting symptoms; and
~ using direct and indirect questioning in a logical, relevant and non-threatening
manner.
• History-taking — The candidate is expected to take a comprehensive history in a patient presenting with the
symptoms of tiredness, arthralgia and weight loss. The additional symptoms of palpitations, change in skin colour
and loss of libido, in the absence of other symptoms or significant past history, indicate there is a multisystem
disorder. However most candidates will require the examination findings to assist in the diagnostic formulation.
• Examination requests should be made for specific diagnostic features. The examiner will respond to a request with
the following specifics:
~ Distribution of hyperpigmentation — generalised over body but not mucos
~ Joints
swelling and some tenderness of wrists, elbows and knees.
Limitation of range of movements and tenderness of the
shoulder joints
~ Pulse
irregular, atrial fibrillation, confirmed by office ECG
~ Blood pressure
140/90 mmHg
~ Heart
no additional findings, no signs of cardiac failure.
~ Abdomen
5 cm enlargement of liver — firm nontender liver edge
~ Genitalia
testes softer and smaller than usual for age
~ Urine
positive for glucose. Diabetes confirmed by random blood
sugar of 12 mmol/L
• Diagnosis/Differential diagnosis — The patient presents the classical clinical picture of haemochromatosis
~ Other causes of increased pigmentation — Addison disease, Cushing disease, hyperthyroidism, cirrhosis,
porphyria, chronic renal failure, malnutrition/malabsorption, drugs causing photosensitivity (for example,
psoralens, phenothiazines, certain antibiotics, amiodarone).
• Choice of investigations — The candidate should indicate the need for:
~ full blood examination and erythrocyte sedimentation rate.
~ creatinine and electrolytes
~ serum iron studies (especially transferrin saturation)
~ liver function tests
~ test for gene for haemochromatosis (HFE) gene
If the candidate suspects haemochromatosis the next steps in the confirmation of the diagnosis should be explained
to the patient. Details of treatment are not required in this case. Specialist referral would be expected for further
assessment and management.
If the candidate does not recognise the significance of the constellation of symptoms and signs, their choice of
investigations and/or referral will indicate the level of performance.
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KEY ISSUES
•
History-taking — the candidate is expected to exhibit appropriate history-taking skills and obtain the key
features of the illness given the patients initial presenting complaints of tiredness, joint pains and weight loss.
This will require a systematic approach to history-taking and the multisystem nature of the complaints requires a
comprehensive but concise history.
•
Choice and sequence of examination — examination of the joints and of the features of skin pigmentation is
expected. The candidate should indicate the need to examine the pulse, cardiovascular system, abdomen and to
look for evidence of endocrine dysfunction.
•
Diagnosis/Differential diagnosis — the condition of haemochromatosis may not be apparent to the candidate
on the history and examination findings. However a consideration of the causes of the multisystem disease with
skin pigmentation, arthritis, cardiac, liver, and endocrine systems disorder should be sensibly discussed.
•
Choice of investigations — these should be appropriate to the investigation of the multisystem disease.
CRITICAL ERROR - none defined
COMMENTARY
In primary haemochromatosis there is increased absorption of iron from a normal diet. Repeated blood transfusions
can cause secondary haemochromatosis. The primary form is an autosomal recessive condition, known also as
'Bronze Diabetes'.
The homozygous state is present in 1:150 in Australia with 1 in 10 carriers (1 in 300 blood donors have iron overload)
and is more common in people of Celtic or Northern European background. Typical manifestations are bronze skin
pigmentation, diabetes (60%), cardiomyopathy, liver damage and pituitary failure. Fatigue, arthralgia and abdominal
pain are leading symptoms, while detection of atrial fibrillation, hepatomegaly, testicular atrophy and hyperglycaemia
make a clinical diagnosis possible.
The critical confirmatory investigations are iron studies — serum iron, total iron binding capacity, ferritin, transferrin
and transferrin saturation, plus testing for the gene for haemochromatosis (HFE gene).
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Condition 070
Recent haematemesis in a 50-year-old man
AlMS OF STATION
To assess the candidate's clinical perspective in examining a patient presenting to the
Emergency Department with an acute haematemesis.
To check abilities to examine for evidence of chronic liver disease.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
The candidates have been told that you have vomited up a large quantity of blood two hours ago
and they have been instructed to undertake a relevant physical examination. They are not
expected to take a further history from you. They have just finished taking a history.
On this occasion you vomited a large amount of fresh blood two hours ago — you think it might
have been a pint or so (500 ml_). You felt temporarily faint and broke into a sweat. You have not
vomited since. Your wife has driven you to hospital where the Hospital Medical Officer (HMO)
has taken your history You are lying on the couch undressed to your underclothes and wearing a
hospital gown. The HMO who has taken your history is about to examine you.
You have given a past history of a previous admission six months ago with a similar episode of
vomiting blood which settled spontaneously, and you were discharged after a few days. You had
an endoscopy through the mouth and you were told you had dilated veins at the lower end of the
oesophagus leading into the stomach. You were warned about the effects of continued drinking.
You've been trying to give this up but you have had limited success. It is likely that the candidates
will want to measure your blood pressure and feel the pulses in your arms. They will also
examine your hands, face, chest and abdomen.
In a patient with liver problems, the findings will be evident on examination, and will have been
previously checked by the examiner.
EXPECTATIONS OF CANDIDATE PERFORMANCE
Candidates should first look for evidence of haemodynamic compromise (looking for evidence of
hypotension and postural drop, pulse, peripheral perfusion). Once candidates indicate they
would take the blood pressure, they can be told that the BP is 110/70 mmHg and pulse 90/min.
As the bleeding occurred only two hours ago, this assessment is particularly important.
Candidates should indicate that they would do a rectal examination looking for a melaena stool,
and will be informed there is a fresh melaena stool on the glove.
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After assessment of stable haemodynamic status as first priority, the candidate
should:
•
Put the patient at ease, correctly position him supine with appropriate exposure to examine
the whole abdomen, groin, head and neck and upper limbs.
•
Make an appropriate examination looking for evidence of chronic liver disease (examination
of hands — liver palms, leuconychia, spiders, clubbing), easy bruising, spider naevi
elsewhere, gynaecomastia, parotid enlargement, oral cavity and tongue, ascites, portal
hypertension (dilated veins and splenomegaly), testicular atrophy.
•
Examine for liver flap.
•
Palpate the abdomen adequately for hepatic and splenic enlargement.
•
Check for evidence of ascites, by palpation for shifting dullness or fluid thrill.
•
Percuss for evidence of liver and splenic enlargement.
•
Auscultate abdomen for venous hum, bruit, bowel sounds.
•
Provide a logical description concerning the examination.
•
Perform the examination in a logical sequence.
KEY ISSUES
•
Performing a satisfactory physical examination pertinent to an episode of acute
haematemesis in a patient in whom evidence of chronic liver disease should be sought
•
Accuracy of examination will be a key issue for the mark sheet when a real patient is
involved.
•
Satisfactory commentary to examiner.
CRITICAL ERRORS
•
Failure to assess the haemodynamic state of the patient.
•
Failure to look for evidence of liver failure and portal hypertension.
COMMENTARY
In this important and common emergency room setting there are three issues the doctor must
focus on:
• Checking the ABC (Airway, Breathing, Circulation) of immediate resuscitation.
•
Assessment of the cardiovascular state of the patient and provision of prompt resuscitation,
if necessary.
•
Identification of the cause of the haemorrhage.
This patient has had a large haemorrhage and the airway couid be compromised. In this
scenario the patient appears fully conscious and is able to give a detailed history, so it is
unlikely that there is a major problem with the airway or breathing.
Thus the physical examination must start with measurement of the blood pressure (lying and
sitting, if necessary) and pulse, and a clinical evaluation of how well the periphery and vital
tissues are perfused. Is the patient shocked, cold and clammy, with a shutdown peripheral
circulation? If the patient is shocked, the physical examination must cease at this stage and the
patient must be resuscitated.
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Provided the patient is stable, a methodical examination may be undertaken to look for the cause of the haemorrhage.
Although the patient's past history has suggested that the cause is alcoholic liver disease, portal hypertension and
bleeding oesophageal varices, this should not be assumed as many patients with known varices will be bleeding from
another cause. The examination should look for:
• signs associated with chronic liver disease:
• signs of possible liver failure;
• signs of portal hypertension; and
• any other clues suggesting a different aetiology for the haemorrhage.
Signs associated with chronic liver disease apart from hepatomegaly include nail changes (leukonychia), salivary
gland enlargement, testicular atrophy, gynaecomastia and spider naevi. If the liver is failing, the patient may have
ascites and encephalopathic changes. Encephalopathy may have a variety of presentations, ranging from minor
mental impairment and flap, through to coma.
Portal hypertension may be manifest by the signs of hypersplenism (purpuric haemorrhage), splenomegaly and
collateral venous channels. The latter may be visible in the anterior abdominal wall as communications between the
umbilical vein and the epigastric venous channels flowing back into the systemic circulation. Of more sinister import
are the oesophageal mucosal collaterals that form between the portal and azygos systems through decompression
along the left gastric (coronary) vein.
Occasionally, the physical examination will reveal other signs that might be associated with haemorrhage, for
example, the hereditary haemorrhagic telangiectasia associated with the Osler-Weber-Rendu syndrome.
Variations on this theme are also used, in which a real patient with liver disease is to be assessed after admission to
the ward and institution of an intravenous drip while blood is being typed and cross-matched. The instructions will in
that case state that the patient is now haemodynamically stable and the emphasis of the task is to assess the patient
for evidence of chronic liver disease, which is expected to be present. The assessment now concentrates on the
technique and accuracy of physical examination as key issues.
In this emergency department scenario the emphasis is FIRSTLY on assessment of stable or unstable haemodynamic
status in a patient with recent haematemesis.
CONDITION 070. FIGURES 1 AND 2.
Abdominal distension — Ascites
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Condition 071
Anaemia in a 28-year-old pregnant woman
AIMS OF STATION
To assess the candidate's ability to define the possible causes of anaemia in pregnancy and to
arrange appropriate investigations and advise the patient concerning the diagnosis and
treatment. The most likely diagnosis is iron deficiency anaemia due to the demands of three
pregnancies in a short time interval, but other causes of anaemia including thalassaemia, and
folic acid deficiency associated with a multiple pregnancy need to be excluded. Having made
the appropriate diagnosis iron therapy should be prescribed.
EXAMINER INSTRUCTIONS
The examiner will instruct the patient as follows:
The list of responses below is likely to cover most of the questions you will be asked.
List of appropriate answers to questions
•
Previous obstetric history — you have had three pregnancies during the last four years. No
postpartum haemorrhage.
•
You did not take iron tablets during these pregnancies: your haemoglobin was always
greater than 100 g/L when previously tested.
•
You noted no excessive blood loss before or between pregnancies — periods have not been
heavy.
You have had no bleeding from the bowel, and there has been no suggestion of malaria or
hookworm infestation; you have always lived in Southern Australia.
•
•
•
You had an ultrasound examination at 18 weeks of gestation, this showed a singleton
pregnancy was present, and confirmed the period of gestation.
Diet — you eat meat occasionally, you don't like green vegetables. No iron tablets have
been taken during the pregnancy.
•
No vaginal bleeding has occurred during the pregnancy.
•
There is no family history of /^thalassaemia or of anaemia generally. You are Australian
born as were your parents, and there is no Mediterranean heritage in the family
•
You have not had a full blood examination (FBE) done before in this pregnancy.
•
You have a supportive partner who assists at home.
Questions to ask if not already covered:
•
'Why have I become anaemic?'
•
'Will my anaemia harm my baby?'
•
'Do I need a blood transfusion?'
•
'How quickly will my haemoglobin come up?'
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Examination findings to be given to the candidate from the examiner on request
Apart from looking pale, general examination is normal. The uterus is enlarged to about 4 cm above the umbilicus
and measures 26 cm above the pubic symphysis.
Investigation results
None has been recorded for this pregnancy other than the ultrasound.
EXPECTATIONS OF CANDIDATE PERFORMANCE
Advice to patient (the candidate should convey the substance of what follows to the patient):
• She needs an FBE to check on the form of anaemia which is present.
• She requires assessment of her iron status — serum iron or ferritin levels should also be checked.
• If the FBE suggests possible /Mhalassaemia minor, haemoglobin electropheresis will also be required.
• Treatment with iron tablets should begin after taking blood for investigation (Ferro-Gradumet® or Fefol®). Two
tablets should be taken a day; she should be warned about the possible effects of these in causing constipation
and dark stools. There is no need for parenteral iron therapy at this time, or blood transfusion.
• A satisfactory response to oral iron therapy should be able to be achieved well ahead of the time that delivery is
likely. The haemoglobin should be checked again in two weeks, along with a reticulocyte count. If the haemoglobin
does not increase satisfactorily, referral to a haematologist for advice concerning diagnosis and treatment would be
appropriate. Providing the anaemia can be treated satisfactorily, there should be little effect on the pregnancy. In
the absence of adequate treatment the placenta becomes larger, however the babies are usually smaller.
KEY ISSUES
• Ability to evaluate appropriately a patient who has become anaemic during pregnancy.
• Ability to commence treatment and arrange appropriate followup in such a patient.
CRITICAL ERRORS
• Failure to make a provisional diagnosis of probable iron-deficiency anaemia due to the demands of successive
pregnancies.
• Failure to administer oral iron therapy.
• Recommending blood transfusion at this time.
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COMMENTARY
This case illustrates a common problem of iron deficiency anaemia in a young woman who has had a number of
pregnancies in a short period of time. This is the most common form of anaemia under these circumstances and
whilst other less common forms of anaemia should be considered, it is important to commence treatment for simple
iron deficiency anaemia whilst awaiting the results of investigations. It is also important to remember that blood
transfusion is not indicated under these circumstances in mid-pregnancy.
Common problems likely with candidate performance are:
•
Failing to focus on other causes of anaemia when taking the history — failing to ask about menstrual loss, loss
from other sites, and failing to consider the possibility of thalassaemia minor.
•
Failing to arrange appropriate blood tests which would include haemoglobin electrophoresis if the anaemia is
hypochromic and microcytic without evidence of iron deficiency, and the assessment of serum iron or ferritin
levels.
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Condition 072
Acute vertigo in a 50-year-old man
AIMS OF STATION
To assess the candidate's ability to diagnose an acute vascular 'stroke' presenting with vertigo.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
Opening statement
'I feel so dizzy that I can hardly stand up. It's like being on a merry-go-round! '
Story in detail without prompting
'This morning just over an hour ago, I was having breakfast when I felt a pain in the left side of my face (indicate the left
side). Then I started to feel numb up and down the other side of my body (indicate the right side) and I became so
dizzy that I couldn't even sit up. let alone stand up. '
'My head felt as if it was exploding, and my speech was funny and slurred. '
'My wife got me into bed and then I felt sick and vomited. I had to lie very still or I wanted to vomit. It was like being very
seasick. So I rested while she rang you. If I turn my head to the side the dizziness gets worse. I found it hard to get in
and out of the car. I keep falling this way (indicate to the left). Am I having a stroke?'
In answer to the doctor's questions
• You are feeling a little better now but would prefer to lie down.
• Everything seems to be moving and spinning around you.
• The pain has gone from your face but the cheek (left) now feels numb too.
• You still have a feeling of numbness down your right side, involving the trunk and limbs.
• No persisting headache or neck stiffness.
• No hoarseness (if asked about swallowing, you did feel that it was difficult to swallow your saliva, but that feeling
has now gone. You suspect that your taste has been affected).
• No previous episodes. No more vomiting. Your speech has now returned to normal after initial slurring
Review of general health
Apart from being overweight and having treatment for high blood pressure and high cholesterol, you feel you have
been in good health. Your blood pressure has been variable. Lipid levels stable.
Appear apprehensive and agitated. Hold firmly onto the desk or chair to keep yourself steady. Lean towards your left
side. Although you have just suffered a cerebral event your ability to give a satisfactory history is not impaired. Give a
full account of your symptoms unless interrupted by the doctor taking control of the interview at too early a stage. You
are very concerned that you are having a stroke.
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Social history
You are married. You and your wife live in your own home. You do not smoke. You work as a
postman. You drink alcohol only occasionally.
Family history
•
Mother died from stroke at 65 years.
•
Father was diabetic, died from heart attack aged 59 years.
•
Major continuing health problems are:
~ Hypertension for about 10 years.
~ Hyperlipidaemia identified about 6 years ago.
~ Both conditions have been well controlled.
Current medication
Norvasc® (amlodipine) 10 mg once daily (calcium channel blocker). Avapro® (irbesartan) 150
mg once daily (angiotensin II receptor antagonist). Lipitor® (atorvastatin) 10 mg once daily
(CoA reductase inhibitor).
After the history is finished, the examiner will hand to the candidate a separate sheet giving an
outline of physical findings as set out in the box below.
Physical Findings
Cardiovascular examination is normal — blood pressure 145/85 mmHg, pulse 80/min and
regular.
The main findings on neurologic examination are that he has an ataxic gait and postural
unsteadiness without significant change on closing eyes. He has some incoordination of
movement of the left arm and hand, but no motor weakness or other motor signs are
present.
Cranial Nerves
•
Eye movements and pupil reactions are normal as is fundoscopy.
•
Nystagmus to the left on looking to the left is present.
•
A left Horner syndrome is present (ptosis, miosis of pupil).
•
Pain sensation to pinprick is lost on the left side of the face and the direct corneal reflex
is absent. Power of the muscles of mastication is normal.
•
Hearing is normal in both ears.
•
Appreciation of pain and temperature sensation is reduced down the whole of the right
side of the body below the face.
•
Vibration and joint position sense and light touch sensation are normal.
EXPECTATIONS OF CANDIDATE PERFORMANCE
Abilities in communication skills and in diagnostic problem solving are required.
This patient is able to give a very full picture of the onset of the condition. The skill required is in
listening carefully, prompting or facilitating when necessary and leaving questions to confirm
clinical suspicion until after the patient has finished.
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Presentation to the examiner requires diagnostic problem-solving skills about:
• Causes of vertigo of sudden onset including stroke or transient ischaemic attack.
• Knowledge of the clinical picture presented by obstruction of the blood supply to the brain
stem and cerebellum.
• Significance of crossed signs, particularly loss of pain sensation to left face but to opposite
side of trunk and limbs.
• Appreciation of cardiovascular risk in this patient.
• Ability to use clinical reasoning skills to explain neurological signs found on physical
examination.
• Appreciating the need for further assessment on an urgent basis.
• Choosing the investigation most urgently required.
Response to observing examiner
The candidate should recognise that vertigo is of central brain stem/cerebellar origin rather than
peripheral vestibular origin.
Its acute onset, associated symptoms and signs and lack of further progression suggest vascular
obstruction rather than haemorrhage. The cerebellum and brain stem are the areas involved.
Differential diagnosis
All unlikely, but other potential causes of vertigo include
• acute labyrinthitis
• benign paroxysmal vertigo
• Meniere syndrome
• migraine
• cerebral tumour
• multiple sclerosis
Response to patient and immediate management
There is a need for immediate hospital admission. Advise that the patient has had a 'mild stroke'
as suspected, but that confirmatory investigation is necessary. This should include urgent
assessment by a specialist physician/neurologist.
It would be reasonable to reassure the patient about the future but to emphasise the need to pay
attention to the underlying risk factors which will require ongoing management after recovery
from this event.
The inclusion of a neurological case of this complexity may be more threatening to candidates
than other cases. Examiners are asked to take this into account when marking. If the candidate
obtains a detailed history, makes a reasonable attempt at explaining the findings on neurological
examination, recognises that the presence of neurological signs as described, in addition to
nystagmus, is indicative of a brain stem lesion and realises that this is a serious disorder of
cerebrovascular origin involving the cerebellum/brain stem and that it requires urgent
investigation, then a clear pass level would be achieved.
The posterior inferior cerebellar artery (PICA) syndrome is, however, well documented and
should not be an unduly difficult diagnosis for a well prepared candidate to suspect from the
history and confirm by the physical findings.
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Investigations
Magnetic resonance imaging (MRI) should be advised associated with hospital admission.
Computed tomography (CT) with CT angiography is also acceptable. Other investigations can
be undertaken later.
Problem solving ability
•
Clinical reasoning skills.
•
Data assimilation from history and examination.
KEY ISSUES
•
Recognition of an acute cerebral vascular event affecting the vertebrobasilar system.
•
Appreciation that this combination of symptoms and signs implies brain stem/cerebellar
disease.
•
Immediate management including appropriate investigation.
Knowledge of the disease process
Recognition that the patient has had a serious cerebrovascular incident (i.e. 'stroke').
Understanding that the pathology is in the area of the vertebrobasilar arterial system.
Knowledgeable candidates may recognise the likelihood of posterior inferior cerebellar artery
(PICA) obstruction, most likely due to thrombosis of the vertebral artery. Embolism is also
possible. Relationship of this episode to the patient's cardiovascular risk factors should be
recognised.
CRITICAL ERRORS
•
Failure to recognise likelihood of cerebral/cerebellar vascular lesion.
•
Failure to advise hospital admission.
COMMENTARY
In this scenario, the sudden onset of vertigo has not been associated with tinnitus or hearing
loss, so the vestibulocochlear system seems likely to be intact.
True vertigo (a sense of rotation between patient and surroundings) is in this instance
accompanied by ataxia (= Greek, without order, in particular a disturbed gait) suggesting an
acute cerebellar disturbance. A cerebellar source is also suggested by the motor
incoordination, without any weakness, in upper and lower limbs.
What else is going on? Other clinical features suggest that a unilateral lower brain stem
disorder is also present Sensory loss to pain is crossed between the face and the
body. There is loss of pain sensation on the left side of the face, but in the trunk and limbs
there is dissociated anaesthesia — sensation of pain and temperature is impaired on the
right side
All forms of ascending sensation for projection into the contralateral cerebral hemisphere come
together at the level of the medulla, (where decussation of the uncrossed fibres of vibration and
joint sense [and half touch] in the posterior columns occurs to join previously crossed pain
and temperature fibres [and half touch] running in the spinothalamic tracts) as illustrated in
Figure 1. The combination of cerebellar ataxia and crossed sensory loss suggests a left sided
lower midbrain and cerebellar lesion
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072
Performance Guidelines
CEREBRAL
HEMISPHERE
Internal
Capsule
MIDBRAIN
All sensation modalities now
conjoined and contralateral
PONS
V n. Sensory,
nucleus
Position, vibration, 1/2 touch
cross in upper medulla
Cuneate & Gracile
tubercles
medial
lemniscus
Spinothalamic tract (s.t )
Pain
Temperature 1 /2 Touch
Spinal Cord
Sensory Ascending Pathways
Condition 072. Figure 1
Are any other brain stem nuclei or long tracts involved?
Yes, the cervical sympathetic outflow is interrupted. Descending excitatory sympathetic fibres to
the cervicothoracic outflow are also concentrated in the medulla. There is a left Horner
syndrome (which fits a left sided lesion) catching the sympathetic head and neck outflow. Loss
of sensation to the left cheek suggests that the left 5th nerve sensory pain nucleus is involved,
with loss also of the corneal reflex.
387
072
Performance Guidelines
The findings fit a left posterolateral lower lateral medullary and left cerebellar lesion
This would be explained by a focal infarct involving the vertebrobasilar system, nofthe carotid
and its branches.
The anatomy of the blood vessels and cranial nerves is as illustrated (Figures 2-5).
-A
MIDBRAIN
PONS
-----C
MEDULLA
VENTRAL VIEW - BLOOD VESSELS & CRANIAL NERVES
va. vertebral artery
b.a. basilar artery
a.i.e.a. anterior inferior cerebellar artery
p.i.e.a. posterior inferior cerebellar artery
a.c.a anterior communicating artery a s a
anterior spinal artery
__________________________________________________________________________
CONDITION 072. FIGURE 2.
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Performance Guidelines
The acuteness of onset suggests embolism or thrombosis. There are no cardiac arrhythmias to
favour embolism, so an acute thrombosis affecting a left sided artery supplying cerebellum and
brain stem is most likely (distal left vertebral artery). The patient has coexisting vascular risk
factors. The absence of progression, and sudden onset make a haemorrhagic stroke less likely.
The differential diagnosis would include other causes of vertigo: Meniere syndrome, chronic
petrositis, cerebellopontine angle tumour, and other neurological problems. None is as likely as a
vascular stroke.
Knowledgeable candidates may recognise that this cluster of symptoms and signs is classical of
thrombosis of the posterior inferior cerebellar artery (PICA syndrome).
The cerebellum and brain stem receive their blood supply via the superior and inferior cerebellar
arteries, arising from basilar or vertebral arteries.
The relevant vascular and cross sectional anatomy is indicated in Figures 2-5
3rd & 4th nerve
Colliculi
Ascending
contralateral
sensory
pathways
Descending
sympathetic
fibres
Descending
ipsilateral
upper motor neurone
pathways
4
CROSS - SECTION MIDBRAIN - A
CONDITION 072. FIGURE 3.
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Performance Guidelines
CONDITION 072. FIGURE 4.
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Performance Guidelines
CROSS - SECTION MEDULLA - C
CONDITION 072. FIGURE 5.
The patient's MRI is shown and demonstrates a left sided focal cerebellopontine vascular infarction. The
patient made a rapid recovery.
CONDITION 072. FIGURE 6.
MRI of patient's head showing left cerebellar and brain stem ischaemic infarction
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Performance Guidelines
Cerebellar functions include ipsilateral stabilisation of motor movements and coordination and
balance. Differentiation of different causes of ataxia can be helped by associated symptoms - sensory ataxia due to loss of position sense is worse in dark conditions.
Cerebellar Disturbances cause:
Cerebellar ataxic gait — with a staggering broad based gait like a drunken sailor, and a tendency
to fall to the side of the lesion. The gait of sensory ataxia from bilateral dorsal column loss with
loss of position sense is by contrast a high 'stamping' gait with positive Rombergism (instability
standing with eyes shut).
Cerebellar incoordination — Various tests evince incoordination of upper and lower limbs 'past-pointing'; 'finger-nose tests' with eyes open or closed; 'dysdiadochokinesia' on rhythmic
pronation-supination, or alternate hand slapping; or knee-shin-ankle placement by other foot, or
rhythmic flexion-extension of ankle.
Additional brain stem damage may be found, for example:
•
ipsilateral
5th nerve
•
ipsilateral
7th nerve
muscles of mastication, facial sensation
loss of taste to side of tongue and motor weakness
•
ipsilateral
8th nerve
disturbance of hearing
•
ipsilateral
9th nerve
difficulties with swallowing
•
ipsilateral
10th nerve
dysarthria
The PICA syndrome classically presents, as in this case, with a dramatic onset of cerebellar
signs with ataxia and vertigo, usually without tinnitus or deafness.
Associated cerebral sympathetic paralysis with an ipsilateral Horner syndrome (ptosis, miosis,
anhydrosis, enophthalmos) from medullary brain stem involvement is common, as is an
ipsilateral loss of facial sensation to pain due to 5th nerve involvement, and other medullary
brain stem nuclei may be affected.
Loss of pain and temperature sensation from opposite (right) side of the body due to
involvement of left spinothalamic tract is also seen.
Dissociated anaesthesia (diminution of pain and temperature sensation with retention of touch
and of other forms of sensation) is classical of a brain stem or spinal lesion below
the pons, and occurs most notably in Brown-Séquard Syndrome (hemisection of cord) with
findings as illustrated (Figure 7):
•
•
•
•
Focal ipsilateral lower motor neuron lesion at the level of the spinal cord injury.
Ipsilateral upper motor neuron lesion paralysis below the injury.
Ipsilateral dorsal column sensory loss (position and vibration sense) below the injury
Contralateral spinothalamic loss (pain and temperature) below the injury
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Guidelines
CONDITION 072. FIGURE 7.
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Performance Guidelines
Condition 073
Urinary frequency in a 60-year-old man
AIMS OF STATION
To assess the candidate's history-taking skills, knowledge of the symptomatology and
confirmatory testing for maturity onset Type 2 diabetes and the investigations which should be
undertaken in a recently diagnosed diabetic.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are aged 60 years. You are consulting your general practitioner about urinary symptoms.
You also have concerns about cancer (your father had prostate cancer) and loss of sexual
function, but these should not be immediately revealed to the doctor.
Opening Statement:
‘I seem to need to go to the toilet to pass urine more often lately doctor.’
In response to the doctor's enquiries, respond as follows but do not volunteer all this
information without appropriate prompting by the doctor.
Over about the last three months you have been passing urine more often during the day and
have to get out of bed to pass urine at least twice each night. You also suffer from leg cramps,
worse at night, and your feet have felt slightly numb. You have felt thirstier lately and your
mouth has been dry.
You have been worried that your symptoms are due to prostate trouble because of your father's
history and recent publicity about prostate cancer
Review of general health
You have lost 4 kg in weight, over the past three months. Admit to feeling tired recently —
'Maybe I'm just worried.' Admit to loss of libido and inability to obtain and sustain an erection
over last 3-4 months. Admit to recent deterioration in eyesight, if asked. ‘I suppose I need new
glasses at my age. '
Review of relevant systems
No other deviations from normal. No dysuria. No incontinence. Normal stream. No other
symptoms suggestive of prostatism with bladder neck obstruction. No chest pain or
breathlessness.
You are a previous patient but not well known to the doctor. Be pleasant, straightforward,
except for some embarrassment over sexual activity. You are worried about prostate cancer.
The doctor may ask additional questions about you. If so. respond as follows:
Smoking habits:
Nonsmoker
Alcohol use: Drug
Two cans light ale daily
sensitivities
Nil
Family history:
Father died from a stroke aged 80 years — also had prostate cancer.
Mother in nursing home — Dementia.
Past medical history:
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no serious illnesses.
073
Performance Guidelines
Physical examination findings to be given to the candidate from examiner on request
He is significantly overweight with abdominal obesity. Blood pressure is 140/90 mmHg, pulse is
regular. He has mild blunting of all sensory modalities in his feet. Neurological examination is
otherwise normal. Genital and rectal examinations are normal, without evidence of prostatic
enlargement or nodularity.
EXPECTATIONS OF CANDIDATE PERFORMANCE
• Summarise the problems presented by the patient:
~ urinary symptoms, thirst, weight loss;
~ numbness in feet and visual disturbance:
~ fear of cancer;
~ erectile dysfunction/reduced libido; and
~ maturity-onset diabetes as the most likely diagnosis.
• Request urinalysis and random blood sugar using glucometer.
ESSENTIAL OFFICE INVESTIGATIONS — TO BE PROVIDED BY EXAMINER WHEN
REQUESTED
Urinalysis — positive for glucose (++++), ketones (+), negative for protein.
Random blood sugar should be done in the consulting room with glucometer. Result of 21
mmol/L effectively confirms diagnosis of diabetes mellitus.
OTHER INVESTIGATIONS
• urea, creatinine and electrolyte levels;
• glucose tolerance test to confirm definitive diagnosis (although the level of random blood
sugar puts the diagnosis effectively beyond doubt);
• microscopy and culture urine — checking for microalbuminuria;
• serum lipids — cholesterol, triglycerides, Low/High Density Lipoprotein (LDL/HDL) and ratio;
• ECG to check for presence of undiagnosed ischaemic heart disease;
• glycosylated Hb should be done as baseline;
• full blood examination and erythrocyte sedimentation rate: and
• prostate specific antigen (PSA) level indicated in view of his family history and concerns.
KEY ISSUES
• Diagnosis of Type 2 diabetes mellitus by appropriate consultation (history, examination and
office tests).
• Appropriate further investigation of newly diagnosed diabetic.
• Recognition of fear of cancer and sexual dysfunction.
CRITICAL ERROR
• Failure to test urine or measure random blood sugar at this consultation
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Performance Guidelines
COMMENTARY
The constellation of symptoms of polyuria, thirst, weight loss, sensory and visual disturbances, and erectile
dysfunction, should raise suspicion of maturity-onset Type 2 diabetes mellitus.
Urinary chemical testing and random blood sugar assessment applied to overweight adults over 45 years will pick up
at least as many nonsymptomatic undiagnosed diabetics as are found on symptomatic presentation.
396
2-E: The Paediatric Consultation
Peter J Vine
'Children are not simply micro-adults, but have their own specific problems.'
Beta Schick (1877-1967)
There are many very positive features about working with
Recognition of the features
children — they are much less complex than adults and usually
in the history and in the
under most clinical situations have only one presenting
clinical signs that indicate
complaint, unencumbered by a series of complicating past
that a child is significantly ill
events or of age-related disease.
is a skill that must be
Medical care and assessment of children is often a developed by anyone caring
multidisciplinary process. Contrary to popular
belief in some circles, children are not just scaled-down adults, but rather their needs are under
the influence of a variety of variable factors, all of which have a profound effect on the
development of the child as he or she progresses to adulthood. All of these influences therefore
must be taken into account when consulting with children and these vary depending on the age
of the child.
Children in Australia have generally been spared the traumas experienced by their peers in third
world countries, or those torn apart and disrupted by war and natural disaster. Refugee children
come from other lands rather than our own, and have their own problems related to this
background. However within our indigenous populations, the health of the children often is
equivalent to those in developing countries — with high infant mortality, a high incidence of
conditions uncommonly seen in the urban populations (for example, rheumatic fever), and a
reduced adult life span,
Australia is a multicultural nation with 25% of the population being born overseas according to
1
the latest Census. Many children are first generation Australians born in this country to
immigrant parents. Our capital cities in particular have people from many nations residing in
them who have cultural beliefs and practices of which doctors need to be aware. Except in the
case of older children where the direct history from the child is most appropriate, the paediatric
history is usually given by a third person, commonly a parent or caregiver. Often with new
arrivals, the history is given by yet another intermediary, an interpreter, who may or may not be a
relative, which may add yet another dimension to the consultation.
Many medical practitioners admit to being rather frightened at the prospect of caring for children,
as the process is so different from that related to adults where the history is obtained from the
patients themselves. Other doctors are apprehensive at being able to perform an adequate
examination of a child. Nowhere else in medicine is it so essential to have expert observation
skills than in paediatrics. Many diagnoses can be made just by observation of the child while the
history is obtained, before any formal examination is performed.
Recognition of the features in the history and in the clinical signs that indicate that a child is
significantly ill is a skill that must be developed by anyone caring for children. While they do
become ill quickly and, if untreated, deteriorate more rapidly than adults, children also repair and
recover quickly. It is imperative that if any child is not improving at a time when improvement is
expected, an immediate investigation into what might be complicating the situation must be
instigated.
1 Australian Bureau of Statistics 2005
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2-E
The Paediatric Consultation
While many illnesses seen in children also occur in adults (for example, asthma) the requisite skill is knowing the
variations that must be considered in the child which will influence future management. An example is the method of
administering bronchodilator therapy in young children. While the same medications are used, their methods of
administration are very different, with small volume spacers and masks designed for very young children.
There are also many conditions that are specific to children, for example hypertrophic pyloric stenosis and cystic
fibrosis — although the latter has now become an adult disease, and adult practitioners need to be aware of
management of this condition. While intussusception can occur in adults in later years, secondary to a number of
bowel lesions, 'primary' intussusception is a very prominent condition in infants, which must be considered in any
infant presenting with colicky abdominal pain. In this country, the majority of children seen in clinical practice present
with relatively minor complaints, but practitioners must always be vigilant for the circumstances when they should be
considering more complex conditions specific to infants and children. Such situations are usually recognised from the
history or the appearance of the child on examination. Beware of the listless infant or child who allows you to perform
any examination you wish. This is usually a very sick child.
Prescription of drugs is also different in children: most drugs are given on a mg per kg basis up to a certain weight and
age. Similarly intravenous and oral fluids are calculated on a mL per kilogram basis and need to be calculated
carefully for each child. Specific pocket handbooks with this information are published by several of the major
Australian paediatric teaching hospitals.
The needs of children to develop their potential and to remain in good health are legion. While we practise in a
so-called developed country, we still have a significant percentage of our child population who live in extremely
adverse circumstances, whether these relate to poor nutrition, poor socioeconomic circumstances, poor parenting
skills, harmful emotional environment or even deprivation. Many primary schools arrange breakfast for their pupils as
for one reason or another the children leave home for school having not eaten.
As each year goes by, the needs of the child change. Many parents find it difficult to provide for those needs, to the
detriment of the child's development. The general practitioner is often an appropriate person to assess this situation.
Unfortunately all too commonly children in our country are the subjects of abuse, whether it be physical, sexual or
emotional, and the medical practitioner needs to be alert to this possibility, especially when the presentation is at
odds with what is observed. Australian law mandates that in each suspicious case, the relevant appropriate
authorities are to be notified.
As is typical of the industrialised countries, the spectrum of conditions seen by medical practitioners has changed
dramatically over the last couple of decades. Rather than malnutrition, many of the problems we see are related to
inappropriate nutritional habits and inactivity leading to obesity.
Emotional and behavioural problems are common and often relate to the child's life experiences. 1 Some situations
that may influence these are:
• many children under two years of age participate in formal child care while parents work, almost a necessity for
maintaining a suitable income:
1 Practical Paediatrics Ed. MJ Robinson, DM Roberton 5th Ed. Churchill Livingstone 2003 p2.
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2-E
The Paediatric Consultation
• the extended family in many communities is scattered and less accessible, as young adults move freely around the
country seeking employment;
• one in five children will experience divorce of their parents before mid teens;
• a significant percentage of children live in one-parent families; many in two-parent families live in very unhappy
circumstances;
• with the higher divorce rate, blended families, where children from previous marriages live together, can often be a
source of major conflict. Having two 13-year-old females suddenly living together can be quite trying; and
• tobacco and/or alcohol use, especially binge drinking, is common in teenagers, and most high school students are
aware of where they can obtain cannabis and other drugs.
Years ago, Dr Howard Williams of Melbourne, a mentor to many practising Australian paediatricians and one of the
forerunners of paediatrics in this country, used to urge his postgraduate students to be aware of 'the new morbidity'. He
stated that his generation had overcome much of the infectious disease morbidity and mortality with antibiotics and
immunisation, but that behaviour problems, disrupted families and the effect on the children involved would be a major
part of the work of the modern practitioner. How right he was, as much of the consultation time of paediatricians in this
country is taken up with oppositional defiant behaviour, attention deficit disorder, and other developmental behavioural
problems.
Much of this may be related to the sociological change in child rearing. Children of today largely depend on artificial
media for entertainment in their spare time — television, cinema, electronic games, many of which require little if any
intellectual skills and commonly have a strong base of violence and aggression. Add to this a high divorce rate and the
loss in many instances of the extended family and the scene may be ripe for acting-out behaviour.
The physical and emotional needs of the growing child must therefore be kept to the fore when children are being
assessed. The presentation of a child with an emotional problem can be quite varied and commonly may be
organically based, so that the practitioner must be very alert to this possibility.
The care of the disabled child, whether it is a physical or intellectual disability, often falls to the primary practitioner for
day-to-day events. Detailed knowledge of rare conditions is not generally necessary, but the support given to parents
as they advocate for their offspring can be a major role asked of the practitioner. Advice concerning screening
procedures and genetics is also a common question, which the practitioner should refer to a higher authority, as the
explosion of knowledge in these fields is occurring at such an alarming rate that it has outstripped the ability of most of
us to keep up-to-date.
The internet has revolutionised the practice of medicine, including paediatrics, as parents consult the internet for
advice on conditions their children are reported to have. Often parents may self-diagnose based on this information,
but generally present with their downloaded information asking for explanation of the contents. Many sites
unfortunately are inaccurate and anecdotal. Hence the practitioner's role often is to sift through this information and to
give an accurate précis of the particular condition.
A complete history, examination and discussion with a parent of a child's problem can take considerable time. In the
AMC MCAT examination, only certain aspects will be examined in any one scenario. For example, the task may
involve coming to a diagnosis from the information supplied and then counselling a parent on the management of the
child's condition. Or it may be taking a focused history to determine the cause of the presentation.
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2-E
The Paediatric Consultation
Candidates therefore are assessed on their ability to relate to a worried parent of a sick child at a standard
expected by the Australian community.
It can be seen then that working with children, while it can be a complex business, is generally quite ordered and
rewarding if aware of the various factors that influence the development both physically and emotionally of the
child, as well as being mindful and knowledgeable about the specific conditions that are peculiar to children.
Children are fun to work with, are honest and much less complex than most adults. They do however have special
needs and are afflicted by many conditions specific to their age group, whether it be neonate or teenager, and the
competent practitioner needs to be aware of these conditions in order to consider them, no matter how minor the
complaint appears to be. The ability to counsel worried parents in an empathie manner is paramount for successful
paediatric practice.
Peter J Vine
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The Paediatric Consultation
2-E The Paediatric Consultation
Candidate Information and Tasks
MCAT 074-077
74
Neonatal jaundice in the first day of life
75
Immunisation advice to the parent of a 6-week-old baby
76
Dark urine, facial swelling and irritability in a 5-year-old boy
77
Fever and sore throat in a 5-year-old boy
401
074-075
Candidate Information and Tasks
Condition 074
Neonatal jaundice in the first day of life
CANDIDATE INFORMATION AND TASKS History
You are asked to see an infant, Jessica, born 24 hours ago, for jaundice. She is the first child of
a healthy mother, whose pregnancy was normal. Delivery was at term, by a midwife, and was
uneventful. The infant weighed 3700 g at birth. Jaundice was noticed soon after birth, within the
first 24 hours. The infant has been sucking well at the breast. The mother wants to go home as
soon as possible.
Examination Findings
The infant is clinically jaundiced but otherwise well and active with no hepatosplenomegaly or
other abnormal physical signs.
You have obtained all relevant findings on history and examination.
YOUR TASKS ARE TO:
•
Ask the observing examiner for results of any investigations you consider necessary.
•
Advise the parent on diagnosis and management.
The Performance Guidelines for Condition 074 can be found on page 405
Condition 075
Immunisation advice to the parent of a 6-week-old baby
CANDIDATE INFORMATION AND TASKS
Your next patient is baby Laura brought by her mother to a general practice at six weeks of age,
as part of routine postnatal followup. Laura is the couples first child. The babe is breastfed and
gaining weight normally. Her mother wants to know what you would advise about immunisation
because she and her husband have recently heard conflicting views expressed in the media.
General examination of the baby reveals no abnormality. She was given her first hepatitis B
vaccination soon after birth.
YOUR TASKS ARE TO:
•
Outline the current immunisation protocol you would recommend and what diseases the
programme is protecting against.
•
Discuss any concerns the parents have about immunisation.
You will not be expected to take any additional history or ask for examination findings. The
Performance Guidelines for Condition 075 can be found on page 408
402
076-077
Candidate Information and Tasks
Condition 076
Dark urine, facial swelling and irritability in a 5-year-old boy
CANDIDATE INFORMATION AND TASKS
A five-year-old boy is brought to the Emergency Department because of swelling around the
eyes. He has only been passing small amounts of urine, which is dark in colour. In the past 12
hours he has become restless and irritable.
The child had school sores (impetigo) three weeks ago, treated successfully with a topical
antibiotic cream, but has had no other prior illnesses.
Both parents are well. The child is an only child and has always kept in good health.
YOUR TASKS ARE TO:
• Ask the examiner for the relevant physical findings you wish to elicit.
• Discuss with the parent your provisional diagnosis.
•
Advise details of any investigations that are required and advise the parent of the treatment
that will be needed.
You do not need to take any further history.
The Performance Guidelines for Condition 076 can be found on page 412
Condition 077
Fever and sore throat in a 5-year-old boy
CANDIDATE INFORMATION AND TASKS
Peter, a five-year-old boy is brought to you in a general practice setting by his parent with a fever
of 40 °C that developed overnight. He complains of an intensely sore throat and finds it sore
when he swallows food or fluid, although he is able to do so.
YOUR TASKS ARE TO:
• Indicate to the examiner the clinical examination you would perform to diagnose the problem.
The examiner will give you the results of the physical examination.
• Discuss with the parent any investigations you feel are necessary.
• Explain your diagnosis and suggest management to the mother.
You do not need to take any further history.
The Performance Guidelines for Condition 077 can be found on page 414
403
2-E
The Paediatric Consultation
2-E The Paediatric Consultation
Performance Guidelines
MCAT 074-077
74
Neonatal jaundice in the first day of life
75
Immunisation advice to the parent of a 6-week-o!d baby
76
Dark urine, facial swelling and irritability in a 5-year-old boy
77
Fever and sore throat in a 5-year-old boy
404
074
Performance Guidelines
Condition 074
Neonatal jaundice in the first day of life
AIMS OF STATION
To assess the candidate's knowledge of causes of neonatal jaundice occurring in the first 24
hours after birth, and the appropriate management of the condition.
EXAMINER INSTRUCTIONS
This scenario illustrates the common problem of ABO blood group incompatibility with the classic
combination of a mother group O Positive and a baby A Positive, and a strongly positive Coombs
test.
The baby's bilirubin level has reached a total of 250 umol/L at 24 hours of age. Phototherapy is
required, which should prevent further rise in bilirubin, but will be needed for several days.
The problem is compounded by the mother's disappointment. She is a young professional
woman who wanted a completely natural delivery and management and is disappointed that she
is not allowed to go home as her infant requires treatment.
Investigation results/details to be given to candidate by examiner on request
Tests performed:
• Mother's blood group
0 Rh positive.
• Infant's blood group
A Rh positive. Direct Coombs test strongly positive.
• Infant's Hb
170 g/L.
• Blood film
microspherocytes.
• Bilirubin
Total
250 umol/L
Conjugated 6 umol/L at 24 hours.
The biochemist indicates that this is abnormal, but below the range at which exchange
transfusion is indicated.
The examiner will have instructed the parent as follows:
• You gave birth to your first child 24 hours ago.
• You believe childbirth is a natural phenomenon, and resent medical intervention.
• You are well educated, and were recently a middle-level manager in a successful company.
• You insisted your obstetrician allowed you to have a natural childbirth with appropriate
assistance from a midwife, and that you could go home on day two.
• Now that your babe has become jaundiced, you are confused and upset.
• After appropriate discussion, you will accept the doctor's recommendations if they are given
clearly and empathically.
405
074
Performance Guidelines
Questions to ask or statements you could make:
•
‘I expected everything to be normal. '
•
‘Why do I need to stay longer in hospital? I want to go home. '
•
‘Is treatment really necessary?'
•
‘What would happen if no treatment were given?'
•
'Are there any side effects of this light treatment?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should explain the following:
•
Jaundice occurring in the first 24 hours after birth is not due to immature liver function, but usually due to
haemolysis consequence upon blood group incompatibility. In a primiparous woman, ABO incompatibility would
be the most likely cause.
•
ABO incompatibility — this has been confirmed by the tests done.
•
Consequence of severe neonatal jaundice and the need for phototherapy and monitoring.
•
Exchange transfusion unlikely to be required but could be an option if jaundice worsens despite phototherapy.
•
The technique of phototherapy, its side-effects and reassurance regarding aspects which could cause anxiety:
~ Jessica's bowel motion may be a loose green/black colour while under lights.
~ Her eyes will be covered while she is under lights to protect her eyes
~ Baby is only under lights when not feeding and is sleeping.
~ Phototherapy may be able to be given in the room where mother is staying in hospital.
•
Excellent prognosis.
•
Arrange continued stay in hospital for mother and infant with facility for mother to continue breastfeeding.
•
Followup developmental assessment and audiometry — not usually discussed at this first consultation.
KEY ISSUES
•
Recognition of haemolytic disease of newborn and its immediate treatment.
•
Empathie but realistic communication with new parent.
•
Ability to relate to mother's disappointment with need for medical intervention.
CRITICAL ERROR
• Failure to recognise haemolytic disease of newborn and failure to advise phototherapy.
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074
Performance Guidelines
COMMENTARY
The dominant cue in this example is neonatal jaundice in the first day of life.
Jaundice occurs frequently in the neonatal period, but when seen on the first day of life, it indicates a pathological and
potentially dangerous rise in bilirubin level. In the common, so-called 'physiological jaundice', the serum bilirubin rises
more slowly, and jaundice is not apparent on the first day.
Haemolytic disease is the most common cause of potentially dangerous neonatal jaundice. As it is readily treatable,
and complications potentially avoidable, early diagnosis is mandatory. Hyperbilirubinaemia is likely to reach a
maximum level around the third day of life.
There is a diagnostic rule that 'jaundice on the first day of life is haemolytic unless
proven otherwise' This originated in the days when Rh haemolytic disease was a common cause. The jaundice of
the affected infant could increase rapidly, so immediate diagnosis and often exchange transfusion were required to
avoid the serious complication of kernicterus or later nerve deafness. The candidate familiar with this rule will
immediately refine the cue to: 'Jaundice on the first day of life, probably haemolytic' This scenario is an example
of the need for pattern recognition where urgent diagnosis is required.
To frame the problem more clearly, the clinician needs to seek evidence confirming the existence of haemolysis and
defining the degree of hyperbilirubinaemia. The protocol states that hepatosplenomegaly is not present. This makes
the severe intrauterine haemolysis seen in some cases of Rh haemolytic disease less likely, but does not exclude less
dramatic forms of haemolysis.
The crucial laboratory tests in establishing the diagnosis are examination of blood group of mother and infant, and
direct Coombs test. The scenario of a group O Positive mother and a group A Positive infant indicates the potential for
the infant's blood to be harmed by maternal anti-A antibody. The positive direct Coombs test confirms that the infant's
red cells have been sensitised by antibody and establishes the diagnosis of haemolytic disease due to AO
incompatibility.
In deciding management and providing further confirmation of the diagnosis, estimation of serum bilirubin level
(direct-reacting and indirect-reacting) should be performed. Bilirubin is derived from the catabolism of haeme proteins
produced in the breakdown of red blood cells. Unconjugated (indirect-reacting) bilirubin is converted in the liver to
conjugated (direct-reacting) bilirubin, and excreted into the bile. Conjugated bilirubin is not reabsorbed once it enters
the intestinal tract. In the present scenario, the level of bilirubin is insufficient to warrant exchange transfusion, but the
clinical picture, combined with laboratory confirmation of an unconjugated hyperbilirubinaemia exceeding 240 umol/L,
confirms the need for treatment with phototherapy.
The degree of haemolysis should be defined by measuring the infant's haemoglobin, though simple transfusion for
correction of the anaemia will rarely be required in AO haemolytic disease and is not needed here.
In this scenario, discussion of other haemolytic or nonhaemolytic causes of neonatal jaundice is not required once the
problem is correctly framed as 'jaundice on the first day of life'.
As indicated in the examiners' 'Performance Criteria', the candidate is not only expected to make the diagnosis, but to
provide information in a persuasive and lucid manner to justify medical intervention, while recognising the mother's
disappointment.
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Condition 075
Immunisation advice to the parent of a 6-week-old baby
AIMS OF STATION
To assess the candidate's knowledge of the currently recommended immunisation programme
in Australia, knowledge of side effects and the latest information concerning claims of
associations with serious medical conditions.
EXAMINER INSTRUCTIONS
The examiner will have instructed the parent as follows:
•
You are the mother of a six-week-old baby, Laura.
•
•
You are an educated parent in a stable marriage.
You are widely read and take an interest in popular medical articles especially during your
pregnancy, as you were concerned about some information you had read and heard about
immunisation and its possible adverse effects.
•
You are taking the opportunity of the six week visit to have these concerns clarified.
Questions to ask unless already covered:
•
•
•
•
•
•
•
•
•
•
'What vaccines or injections will Laura need to be immunised with, up to school
age?'
'What problems might she have?'
'Are there any children who shouldn't have these vaccines 9 '
'I've heard the whooping cough vaccine can cause brain damage. Can we leave it
out 9 '
'What other side effects happen with these vaccines 9 '
'What if we didn't give these vaccines — can't you just treat any infections with
antibiotics anyway?'
‘I have a friend who goes to a homoeopath and he gives the same vaccines, but
very diluted, by mouth and there are no side effects. Is that an alternative?'
'What about other alternative vaccines?'
'I've heard babies can get high fever and be guite sick after some of these
injections. Can you do anything to ease the side effects?'
'I've also heard about a vaccine for chicken pox. Is this available and do you
advise it?
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should give the parent a succinct and accurate regimen for the immunisation that
is currently recommended, with special reference to those given at two months. If uncertain, the
candidate should be aware of the current NHMRC Immunisation Guidelines and how to access
them.
Examiners should be aware that the recommended schedule has changed annually over the last
several years as new vaccines have been introduced. In the future, combination vaccines which
will reduce the number of injections are expected and small variations to the schedule will be
needed to accommodate these. To reduce reliance on single suppliers, several versions of these
combination vaccines are likely to be approved and thus variations as currently seen in the
schedule will become more common. Because of this, candidates should demonstrate familiarity
with the basic principles of the immunisation
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Performance Guidelines
schedule rather than detailed knowledge of precise recommendations, particularly for States
other than the one in which they work.
Examiners should also be aware that the level of understanding expected should match the
current edition of the immunisation handbook rather than vaccines introduced subsequent to
publication of the handbook. The following would generally be recommended:
• At birth: Hepatitis B (hepB).
• At 2 months and 4 months: Acellular diphtheria, tetanus, pertussis (DTPa); H.influenzae
type B (Hib); oral or inactivated polio vaccine (O/IPV); hepatitis B (hepB); 7-valent
pneumococcal conjugate vaccine (7VPCV).
• At 6 months: Acellular diphtheria, tetanus, pertussis (DTPa); oral or inactivated polio
vaccine (O/IPV); (hepatitis B [hepB] in NSW, QLD, SA. NT); 7-valent pneumococcal
conjugate vaccine (7VPCV).
• At 12 months: Measles, mumps, rubella (MMR); H.influenzae type B (Hib);
meningococcus (MenC): (hepatitis B [hepB]) in VIC, WA, TAS).
• At 18 months: Varicella zoster virus (VZV); 23-valent pneumococcal polysaccharide
vaccine (23VPPV).
• At 4 years: Acellular diphtheria, tetanus, pertussis (DTPa); measles, mumps, rubella
(MMR); oral or inactivated polio vaccine (O/IPV).
Examiners should note that there are slightly different recommendations for the
immunisation schedule from State to State. What is being tested in this scenario is
whether the candidate is aware of the general principles for DTP, Hib, polio, hepB, MMR,
meningococcus, pneumococcus, chicken pox.
Candidates should address specific concerns that the mother may have regarding possible side
effects and the incidence of these. If the parent has no particular concerns, the candidate should
discuss known side effects and how these can be reduced, but stress that these are few and
minor and that vaccinations are safe. Also stress the marked decrease in the incidence of side
effects with the use of acellular vaccines for pertussis.
Candidates should discuss the few absolute contraindications to vaccination. These are
encephalopathy within seven days of a previous DTP-containing vaccine or an immediate severe
or anaphylactic reaction to vaccination with DTP. A simple febrile convulsion or preexisting
neurologic disease are not contraindications to pertussis vaccine.
Children with minor illnesses, i.e. without systemic illness and providing the temperature is less
than 38.5 "C, may be vaccinated safely. With a major illness or a high fever, the vaccination
should be postponed until the child is well.
Live vaccines (MMR, oral poliomyelitis, rubella, chicken pox) should not be administered to
immunocompromised patients. An anaphylactic reaction to egg is not a contraindication to MMR
vaccine, but many authorities recommend that in such a case it should be administered in an area
where resuscitative equipment is available and the child be observed for 4 hours.
The following are NOT contraindications to any of the vaccines in the standard schedule:
• family history of adverse reactions to immunisation;
• family history of convulsions;
• previous pertussis-like illness, measles, mumps or rubella infection;
• prematurity (immunisation should not be delayed);
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Performance Guidelines
•
stable neurological conditions (e.g. cerebral palsy, Down syndrome);
•
contact with an infectious disease
•
asthma, eczema, atopy, hay fever, 'snuffles';
•
treatment with antibiotics;
•
treatment with locally inhaled or low dose topical steroids;
•
child's mother is pregnant;
•
child is breastfed;
•
history of jaundice after birth;
•
over the age recommended in vaccination schedule;
•
recent or imminent surgery; and
•
replacement corticosteroids.
Candidates may mention the reported association of measles vaccination with autism The
knowledgeable candidate will be aware that no association has been convincingly
demonstrated and several studies show no link at all. Candidates should state that there is no
evidence for the efficacy of alternative (homoeopathic) oral vaccines given sublingual^ Latest
vaccination now available for varicella-zoster virus (the cause of chicken pox) and
meningococcus should be discussed and recommended.
Candidates should stress that many of these diseases are still prevalent in the community (e.g.
pertussis, pneumococcal and meningococcal infections, and varicella). Candidates may
suggest paracetamol for fever and pain after vaccination as necessary, including a single dose
about 30 minutes prior to DTPa prophylactically and for subsequent immunisation if significant
reaction with fever with first or second dose.
KEY ISSUES
•
Knowledge of basic principles of current immunisation regimens.
•
Explanation and accurate nformation regarding benefits of immunisation
•
Exploration of parental concerns.
CRITICAL ERRORS
•
•
Candidate provides wrong advice regarding contraindications to immunisation.
Recommendation or acceptance of sublingual homoeopathic vaccines.
COMMENTARY
This scenario is concerned with counselling a young mother on the advantages and
disadvantages of immunisation. This requires of candidates a sound knowledge of the topic and
an ability to give the information to the parent in a manner that gives a balanced overview,
without domineering with their own personal feelings. This is a very common situation in general
practice where patients will often attend to discuss with the doctor, beliefs they have, or to seek
further information on a topic. Doctors should not hesitate to admit that they do not know a
particular answer but should offer to seek the answer and communicate it at a later date.
Updated immunisation schedules such as the one illustrated are available from paediatric
hospitals.
Candidates should be aware of the absolute contraindications to the standard vaccinations and
also the false contraindications which are so often quoted.
410
CONDITION 075. FIGURE 1.
Immunisation schedule guidelines adapted from Royal Children's Hospital, Melbourne, 2006
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Performance Guidelines
Condition 076
Dark urine, facial swelling and irritability in a 5-year-old boy
AIMS OF STATION
To assess the candidate's ability to recognise that this child most likely has acute poststreptococcal glomerulonephritis (PSGN) which requires hospitalisation in view of hypertension
and recent irritability.
EXAMINER INSTRUCTIONS
The examiner will have instructed the parent as follows:
You are the parent of a five-year-old boy. You are particularly concerned about the dark urine
and swelling of the boy's face. Nothing like this has ever happened before. The child has never
been really sick before. This illness is all very unusual and worrying.
Questions to ask unless already covered:
•
•
•
•
•
•
'Why has this happened?'
'Will my son be all right?'
'What is going to happen now?' (If hospitalisation is recommended)
'What is going to be done to my son in hospital?' (If hospitalisation is recommended)
'What are they looking for with these tests?'
'How long will it take to get results?'
If kidney biopsy is mentioned, become even more concerned.
•
‘Is that really necessary?'
•
'Why is blood testing not enough?'
Relevant physical findings to be given to the candidate on request
Resting blood pressure
145/90 mmHg. No postural hypotension.
Temperature
36.5 °C.
Pulse
90/min regular.
Periorbital oedema present
no oedema elsewhere.
no ascites or pleural effusions.
Cardiovascular system
normal.
Liver edge
palpable just below the costal margin.
Optic fundi
normal.
ENT examination
normal.
Urine dipstick
strongly positive (++) for blood and protein.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should explain the cause of the child's clinical picture in terms the parent can
understand, and without medical jargon. This would include that the original skin streptococcal
infection (impetigo) has triggered an immune reaction of the body against the organism and that this
reaction is occurring in the kidneys causing a major effect on
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Performance Guidelines
their function. This then leads to a fall in urine output, and salt and fluid retention that causes the
swelling of his eyes and raised blood pressure.
Hospital admission is desirable in view of the acute presentation and hypertension
Investigations required will include blood and urine tests to confirm the provisional diagnosis of
PSGN.
Tests to be ordered should include:
• Urea and electrolytes, creatinine, inflammatory markers — C3, C4, ASOT, DNAase B
• Urine micro and culture, full blood examination
Immediate management
• Admission to hospital.
• Strict fluid balance and restricted fluid intake
• Test all urine - four-hourly blood pressure and other vital signs.
• Daily weight.
• Low protein, low salt/high carbohydrate diet.
• Antihypertensive treatment.
• Penicillin therapy may be suggested — but is not essential
• Renal biopsy is not needed for diagnosis at this stage.
Future management
• Monitor blood pressure and renal function weekly/monthly/quarterly as needed as
convalescence progresses.
• Regular urinalysis (microscopic haematuria may persist for up to two years).
• Long term prognosis is excellent with a very low incidence of sequelae; so positive and
sympathetic reassurance is required.
KEY ISSUES
• Diagnosis of acute PSGN
• Ability to specify appropriate plan of investigations.
• Development of coherent treatment plan
CRITICAL ERROR
• Failure to admit to hospital
COMMENTARY
This scenario involves diagnosis, from clinical signs and appropriate investigations, and an
empathie explanation of treatment. From the information given, the candidate should be able to
arrive at the correct diagnosis and investigate and treat appropriately. Failing to do so puts the
patient at risk. While classical poststreptococcal glomerulonephritis has become rare in many
parts of Australia, knowledge of the condition is important in considering the differential
diagnosis of this child's symptoms.
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Performance Guidelines
Condition 077
Fever and sore throat in a 5-year-old boy
AIMS OF STATION
To assess the candidate's ability to diagnose and treat a child with tonsillitis most likely due to
Group A β-haemolytic Streptococcus. Some investigations to confirm this are indicated.
EXAMINER INSTRUCTIONS
The examiner will advise the parent as follows:
You are the mother of a five-year-old boy, Peter, who has become unwell overnight with a very
sore throat and has difficulty swallowing food and drink. He most likely has an acute tonsillitis
which should be treated with penicillin. The candidate may suggest some basic investigations
to help confirm the diagnosis. You are worried that Peter has tonsillitis, and are concerned by
his high temperature.
Family history
Both parents are well. Father is an office-worker, mother is at home. Three-year-old sister at
kindergarten is well. Your son has had no previous antibiotic reactions.
Questions to ask unless already covered:
9
•
'How would he get this infection '
•
'Is he likely to get it again?'
•
'What causes this infection '
•
'I've heard that this sort of infection can damage your heart or your kidneys or something - is
that right?'
•
How long will he take to get better?'
•
'Is antibiotic therapy reguired?'
9
Examination findings to be given by examiner to candidate on request
A flushed child, tonsils acutely inflamed with follicular exudate, with moderately enlarged
and tender cervical lymph nodes on both sides.
The appearance of his oropharynx and tonsils are shown in the illustration (Figure 1). which
the examiner will show to the candidate.
There is no evidence of neck stiffness, no hepatosplenomegaly, rash or lymph-adenopathy
elsewhere.
Temperature is 40 °C, blood pressure 110/70 mmHg, respiration rate 24/min, pulse rate
110/min
Tympanic membranes are normal on otoscopy.
Examination is otherwise normal.
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CONDITION 077. FIGURE 1.
Acute tonsilitis
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should enquire as to the important clinical findings on examination allowing confident diagnosis of
acute tonsillitis, most likely bacterial. A throat swab could help confirm this prior to antibiotic treatment. The candidate
should be able to explain in simple terms the diagnosis and its associated complications in a manner that the parent
can understand; and should also arrange for further review in a few days to ensure the expected recovery is occurring
and if not, review and possibly seek other aetiologies.
Explanation of diagnosis
Acute tonsillitis, probably streptococcal. Reassure that with appropriate treatment this should resolve completely.
Immediate management
The candidate may wish to perform a throat swab for culture (appropriate but not obligatory). There is no need for any
other investigations at this stage. Check whether antibiotic reaction previously, and prescribe oral penicillin. Advise
the mother of need for frequent fluids. Prescribe analgesics.
Although the problem might be viral and settle without antibiotics, the majority opinion would be that penicillin therapy
is indicated because of the high likelihood of the diagnosis being streptococcal tonsillitis. If the candidate does not
recommend antibiotic therapy the mother should ask whether antibiotics are needed.
Antibiotic therapy would not only treat the streptococcal sore throat but would probably reduce the likelihood of
serious poststreptococcal complications.
Future management
Suggest review in few days or earlier if concerned and if the child has not responded as expected. If this is the case,
other aetiologies (e.g. infectious mononucleosis) should be sought. Stress that a full course of 10 days penicillin
treatment is required. Indicate that viral infection may cause similar features, as might acute infectious
mononucleosis.
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Performance Guidelines
KEY ISSUES
•
Appropriate examination interpretation, with appropriate diagnosis.
•
Adequate treatment plan.
•
Appropriate explanation.
CRITICAL ERRORS
•
•
Failure to consider streptococcal tonsillitis as the diagnosis.
Failure to discuss followup and screening for other conditions if there is no initial
improvement.
COMMENTARY
This scenario assesses the ability of the candidate to come to a logical conclusion as to the
most likely diagnosis (acute bacterial tonsillitis) in this situation based on the information
provided and knowledge of the natural history of disease processes. The scenario tests
diagnostic acumen by showing how several conditions can be safely excluded because of the
history and the time frame and gives scope to considering other diagnoses if the provisional
diagnosis is not confirmed.
416
2-F: The Obstetric
Consultation
and
Gynaecologic
Roger J Pepperell
'Man endures pain as an undeserved punishment; woman accepts it as a natural heritage.'
Anonymous
Although in clinical practice obstetric and gynaecologic consultations may
Although it would be unusual for
involve a consideration of a complex set of symptoms and history which can
you to have to examine the
include relevant past history, medical history and social history, the clinical
abdomen of a pregnant woman, or
scenarios used as part of the MCAT examination are much more focused
perform a pelvic examination in the
and restricted to fit in with time constraints. The scenarios reflect conditions
actual clinical MCAT examination,
which should be able to be appropriately assessed and managed by a final
you clearly need to know how to do
year medical student or a doctor working as an intern in a public hospital or in
such clinical examinations and may
community practice.
well need to do such assessments
Some involve the candidate taking an appropriately focused history to enable on models which have been
the diagnosis to be made. Because only eight minutes are allocated
specifically designed and produced
for the assessment, and the history-taking will represent only a fraction of the for this purpose.
total time spent, the history-taking must concentrate on relevant issues and
not be generalised, verbose and largely irrelevant.
Some of the stations involve the candidate requesting the examination
findings they would look for if assessing such a patient to allow the examiner to assess whether the candidate knows
what examination findings are particularly relevant and important in assisting the candidate make the correct
diagnosis in this circumstance.
Where investigations are required to assist in making a diagnosis or starting treatment, the candidate is again
expected to show perspective rather than ordering a large number of irrelevant and inappropriate tests.
If the candidate needs to advise the patient on the initial management plan, this should be provided to the patient in lay
language, in terms she can readily understand, with perspective and with empathy and compassion. In obstetrics and
gynaecology, all of the options of management which might be appropriate need to be provided to the patient, to
enable her to decide which option she will accept, and ultimately to give the clinician informed consent to proceed with
the option chosen.
In clinical practice today, particularly in obstetrics and gynaecology, communication with the patient, and if appropriate
with her partner, is mandatory, and unless done in a manner which is acceptable to the patient, can result in the
candidate being reported to the relevant medical board or health complaints commission.
Where the clinician is not prepared, on religious grounds, to follow through a particular treatment which might be
appropriate, such as a pregnancy termination because the fetus has a lethal congenital abnormality, the clinician has
a responsibility to explain the options available to the patient, and has an obligation to offer to refer her to an
appropriate physician who would provide the treatment she has accepted as being most appropriate. Personal beliefs
should not restrict the matters discussed with the patient although they may affect what the clinician is actually
prepared to do in terms of actual management.
417
2-F
The Obstetric and Gynaecologic
Consultation
Clinicians must preserve a nonjudgmental and supportive approach in discussion and must not impose their own
religious or other nonmedical views on a concerned patient.
Although it would be unusual for candidates to have to examine the abdomen of a pregnant woman, or perform a
pelvic examination in the actual clinical MCAT examination, they clearly need to know how to do such clinical
examinations and may well need to do such assessments on models which have been specifically designed and
produced for this purpose.
The various scenarios cover aspects of the female reproductive system including normal development and
disorders of uterus, tubes, ovaries, vagina, fertility and contraception, hormonal influences, pregnancy,
labour, abortion, obstetrical toxaemia and haemorrhage, menopause, pelvic infection, vaginal discharge,
dyspareunia, haemostasis and bleeding disorders.
Roger J Pepperell
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2-F
The Obstetric and Gynaecologic
Consultation
2-F The Obstetric and Gynaecologic Consultation
Candidate Information and Tasks
MCAT 078-082
78
Breech presentation in labour at 38 weeks in a 25-year-old woman
79
Vaginal bleeding in a 23-year-old woman
80
Cessation of periods in a 30-year-old woman on the oral contraceptive pill (OCP)
81
Positive culture for Group B streptococci (GBS) at 36 weeks of gestation in a 26-year-old
woman
82
Vaginal bleeding after 8 weeks amenorrhoea in a woman with previous irregular cycles
419
078-079
Candidate Information and Tasks
Condition 078
Breech presentation in labour at 38 weeks in a 25-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in the Emergency Department of a general hospital. This patient is 3 25-year-old
woman in her second pregnancy, at 38 weeks of gestation and is in early labour. Vaginal
examination unexpectedly reveals a breech presentation: the legs of the fetus are apparently
both extended. The cervical dilatation is 4 cm. The previous pregnancy resulted in a normal
cephalic vaginal delivery of a 4 kg baby at 41 weeks of gestation. The current pregnancy has
been uneventful to date and the fundal height is 38 cm above the pubic symphysis at the time of
admission in labour at 38 weeks.
YOUR TASK IS TO:
• Advise the patient of the possibilities in regard to subsequent management and the pros
and cons of these.
You may take any further relevant history you require, but do this briefly as the essential features
have been provided above.
The Performance Guidelines for Condition 078 can be found on page 424
Condition 079
Vaginal bleeding in a 23-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in a hospital Emergency Department. Your next patient is a 23-year-old
nuliiparous woman who has been trying to conceive, and believes she is pregnant. She has
developed vaginal bleeding after eight weeks of amenorrhoea.
YOUR TASKS ARE TO:
•
Take any further relevant history you require.
•
Ask the examiner about the findings you would look for on general and gynaecological
examination and the results of any tests you would expect to be available at the time you
are seeing the patient.
•
Advise the patient of the probable diagnosis and subsequent management you would
institute, including any further investigations you would arrange.
The Performance Guidelines for Condition 079 can be found on page 427
420
Candidate
080-081
Information
and
Tasks
Condition 080
Cessation of periods in a 30-year-old woman on the oral
contraceptive pill (OCP)
CANDIDATE INFORMATION AND TASKS
Your patient is a 30-year-old woman who is taking the oral contraceptive pill (OCP). She has
come to see you in a general practice because she did not have a period following the last two
courses of pills
YOUR TASKS ARE TO:
• Take a further focused history.
• Ask the examiner about the findings you wish to elicit on general and gynaecological
examination.
• Advise the patient of the diagnosis and subsequent management (including any
investigations you would arrange).
The Performance Guidelines for Condition 080 can be found on page 430
Condition 081
Positive culture for Group B streptococci (GBS) at 36 weeks of gestation in a
26-year-old woman
CANDIDATE INFORMATION AND TASKS
Your next patient is a 26-year-old woman who is now at 37 weeks of gestation in her first
pregnancy. You have been looking after her pregnancy in a shared care arrangement in a
general practice setting. All has been normal, and at 36 weeks you ordered a vaginal and rectal
swab for Group B streptococcal (GBS) testing. This test has shown GBS organisms were
detected in the lower vagina. She has returned to receive the results and any implications if the
test is positive.
YOUR TASKS ARE TO:
• Advise the patient of the results of the GBS test.
• Advise her about the subsequent management you would advise
There is no need for you to take any further history or to request any examination findings or
investigation results from the examiner
The Performance Guidelines for Condition 081 can be found on page 432
421
082
Candidate Information and Tasks
Condition 082
Vaginal bleeding after 8 weeks amenorrhoea in a woman with
previous irregular cycles
CANDIDATE INFORMATION AND TASKS
Your patient is a 25-year-old married nulliparous woman who presents to you in a general practice
with vaginal bleeding after eight weeks of amenorrhoea. Her cycles are often irregular with the
periods occurring at intervals of 4-8 weeks.
YOUR TASKS ARE TO:
• Take a further focused history.
• Ask the examiner about the findings you wish to elicit on general and gynae- |
cological/obstetric examination.
• Advise the patient of the probable diagnosis and subsequent management, including any
investigations you would arrange.
The Performance Guidelines for Condition 082 can be found on page 434
422
2-F
The Obstetric and Gynaecologic Consultation
2-F The Obstetric and Gynaecologic Consultation
Performance Guidelines
MCAT 078-082
78
Breech presentation in labour at 38 weeks in a 25-year-old woman
79
Vaginal bleeding in a 23-year-old woman
80
Cessation of periods in a 30-year-old woman on the oral contraceptive pill (OCP)
81
Positive culture for Group B streptococci (GBS) at 36 weeks of gestation in a 26-year-old
woman
82
Vaginal bleeding after 8 weeks amenorrhoea in a woman with previous irregular cycles
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Performance Guidelines
Condition 078
Breech presentation in labour at 38 weeks in a 25-year-old woman
AIMS OF STATION
To assess the candidate's ability to appropriately advise a patient concerning the advantages
and disadvantages of vaginal breech delivery or Caesarean section when the fetus is found to
be presenting by the breech in early labour at 38 weeks of gestation.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
Breech presentation has not previously been diagnosed and all your tests and progress have
been normal, as was your previous pregnancy.
Opening statement:
'So it is a breech, doctor. Does that cause any problems?'
List of appropriate answers to questions by the candidate:
•
Your desires in relation to mode of delivery are as follows:
~ You would prefer vaginal delivery if possible but would accept Caesarean section if this is
recommended as necessary or very much more preferable.
~ You had no problems with delivery of the first baby at 41 weeks of gestation. Forceps
delivery was not required.
~ Only a very small episiotomy was necessary, despite the baby weighing 4 kg.
~ Your antenatal course in this pregnancy has been normal.
~ There is no family history of diabetes or other problems.
Questions to ask if not already covered:
•
'What are my options regarding delivery?'
•
'Are there any significant risks to the baby or me if I have my baby normally?'
•
‘What are the potential problems to the baby of vaginal delivery versus Caesarean section?'
Examination findings
The candidate may ask for specific components of the examination, but no additional findings in
addition to those outlined in the candidate's instructions need to be given.
Investigation results
None is to be provided or available.
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Performance
Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
Advice to patient (the candidate should convey the substance of what follows to
the patient):
• Diagnosis - breech presentation in early labour. The type of breech presentation (extended
legs) is a favourable one. and as she is keen to avoid a Caesarean section delivery, an attempt
at vaginal breech delivery would be appropriate.
• X-ray pelvimetry is unnecessary in view of the size of her previous baby (4000 g) which was
born at 41 weeks of gestation. Although second babies are likely to be bigger than the first
one. the current baby is being delivered three weeks earlier than the preceding one which
means it should be smaller than the previous child
• Cardiotocography (CTG) monitoring is necessary in association with breech presentation as
there is an increased risk of cord prolapse associated with this abnormal presentation. Vaginal
examination as soon as the membranes rupture, to exclude cord prolapse and confirm the
type of breech presentation, is also mandatory.
• As she is in labour, ultrasound examination will probably be difficult to arrange urgently Had
the breech presentation been diagnosed prior to labour, ultrasound would have been of value
to check fetal size, type of breech presentation, and whether the fetal neck was extended.
• Caesarean section would be indicated if there was slow progress of labour, or if breech
extraction was considered required to effect delivery because of fetal distress or inadequate
progress, or a significant CTG abnormality occurred in the first stage of labour.
• A successful outcome of labour can be anticipated with the findings which are evident in this
patient. However about 3-5% of patients do have problems during the latter stages of delivery
due to difficulty delivering the legs, arms or head.
KEY ISSUES
• Ability of the candidate to advise and counsel a patient of the current options in regard to
breech delivery by vaginal or Caesarean delivery.
CRITICAL ERRORS
• Failure to advise of the appropriate risks of vaginal breech delivery
• Recommending that external cephalic version should be attempted despite the fact she is in
labour.
• Indicating to the patient that vaginal breech delivery is absolutely contraindicated despite her
desires.
COMMENTARY
Approximately 4% of all babies present by the breech, and vaginal delivery is safe in selected
patients. This particularly applies where the baby is of normal size (between 2.5 and 4.0 kg); the
breech presentation is a complete breech or a breech with extended legs: the fetal neck is not
extended; where labour occurs spontaneously and progresses at the appropriate rate; and where
the pelvic dimensions are normal.
425
078
Performance Guidelines
There are risks to the baby of vaginal delivery however, and the risks are higher than when the baby is delivered by
Caesarean section. These aspects were well reported in the Term Breech Trial published in 2000.
In this patient it would be appropriate to recommend a trial of vaginal delivery with appropriate monitoring.
Caesarean section recommendation at this stage would be appropriate depending on the patient's responses and
concerns after discussion.
The recent trial of vaginal breech delivery as compared to Caesarean section delivery clearly showed the risk of
vaginal delivery was higher than that associated with delivery by Caesarean section. Despite this, and the general
recommendation that all babies presenting by the breech should be delivered by Caesarean section, some patients
will still prefer a vaginal delivery.
If the candidate suggests external cephalic version should be attempted at this time, when she is clearly in labour,
this is contraindicated and clearly WRONG.
Common problems likely with candidate performance are:
•
Failure to advise of the actual care in labour which would be given.
•
Failure to advise that the risk of vaginal breech delivery is higher than that of delivery by Caesarean section with
the risk being approximately doubled.
426
079
Performance Guidelines
Condition 079
Vaginal bleeding in a 23-year-old woman
AIMS OF STATION
To determine the ability of the candidate to assess and appropriately manage a patient in early
pregnancy with eight weeks of amenorrhoea which was then followed by vaginal bleeding.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient to reply to questions from the candidate as
follows:
• Your periods are usually regular and normal and your last menstrual period was eight weeks
ago. You think and hope that you are pregnant; this is your first pregnancy. You checked via a
chemist two weeks ago, and had a urine pregnancy test which was positive.
• You and your husband have been trying to conceive since stopping the pill.
• You ceased the oral contraceptive pill (OCP) five months ago, and have had regular menstrual
cycles since then until recent amenorrhoea.
• No bleeding since last menstrual period until yesterday. Light loss then. Total loss is much
less than a normal period. Bleeding seems now to have stopped.
• You have minimal pelvic discomfort.
• Breasts sore and nipples tender for last six weeks — no reduction in these symptoms recently.
• Blood group O Rh negative.
Questions to ask if not already been covered:
• 'Will my baby be OK?'
• 'Can you give me something to make sure I don't lose this pregnancy?'
• 'What will happen if I miscarry?'
Physical examination findings to be given to the candidate on request
General examination
Pulse
80/min and regular.
Blood pressure
120/80 mmHg, not distressed
Pelvic examination
cervix closed and firm, no blood in vagina.
Uterus
retroverted, enlarged to the size of an eight-week pregnancy.
Adnexae
no mass or tenderness
Previous investigation results to be given on request
Pregnancy test
positive previously, confirmed on spot urine testing now.
Blood group
O, Rhesus negative
427
079
Performance Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
Advice to Patient
The substance of what follows should be communicated to the patient in lay terms.
•
She needs an ultrasound of the pelvis to enable the pregnancy to be sited, to confirm the gestation, to check the
sac size, liquor volume, and the presence or absence of fetal heart activity. These findings would be expected to
confirm and define the diagnosis of threatened abortion (miscarriage). The candidate should ask for these
investigations to be done and should explain to the patient that if everything was normal, the pregnancy was in
the uterus, and the fetal heart activity was present, the diagnosis is a threatened miscarriage, with a good
prospect of a continuing viable pregnancy.
•
Other investigations required: checking the haemoglobin and check indirect Coombs as patient is Rh negative. If
indirect Coombs is negative, give anti-D if abortion occurs. (Anti-D is often not available in Australia for a
threatened abortion).
Immediate Management
•
Treat conservatively and rest. No specific therapy is effective in improving the pregnancy outcome.
•
Chance of successful outcome of pregnancy — prior to performance of the ultrasound the chance of success
was only 50%. Providing the ultrasound examination is perfectly normal, the chance of a successful pregnancy is
somewhere between 90% and 95%.
KEY ISSUES
•
Ability to define the diagnoses needing to be considered in the presence of eight weeks of amenorrhoea.
•
Ability to appropriately investigate a woman with these symptoms.
CRITICAL ERRORS
•
Failure to confirm pregnancy by pregnancy testing
•
Failure to arrange ultrasound to check site and viability of pregnancy.
•
Failure to consider use of anti-D in view of Rhesus negative state.
428
079
Performance Guidelines
COMMENTARY
In all cases of bleeding in early pregnancy, the most critical examination findings are those of uterine size, the state of
the cervix and the presence or absence of pelvic tenderness. The reliance upon ultrasound examination alone is
inappropriate. Ultrasound in this case will enable the viability of the pregnancy to be assessed, thus enabling the
patient to be reassured with a degree of confidence. The other aspect of this case is the fact that the patient's blood
group is O Rhesus negative. Common problems likely with candidate performance are:
• When taking the history, not being focused enough to the actual problem, but asking for information such as
irrelevant past history, social history etc. This just takes time to do and reduces the time available for the remaining
tasks.
• Failure to examine the patient appropriately (cervical closure or opening status was not requested, uterine size was
not asked for. possible signs suggesting an ectopic pregnancy were not asked for).
• Failure of candidate to advise the patient of the likely prognosis for this pregnancy, following performance of the
ultrasound examination and assuming confirmation of normal findings.
429
080
Performance Guidelines
Condition 080
Cessation of periods in a 30-year-old woman on the oral
contraceptive pill (OCP)
AIMS OF STATION
To assess the candidate's ability to take an appropriate history and to assess findings to define
the cause of amenorrhoea developing while on the OCP, and then to appropriately counsel the
patient.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient to reply to questions from the candidate as
follows:
•
You were married six years ago. You have been on the OCP since then. You will probably
want to conceive in about two years time.
•
Your menarche was at 14 years of age. When not on the OCP, your cycles were 28 days long
and you bled for three days, but lightly.
•
You have been on Microgynon 30® for six years. Initially the periods were normal, but they
have become lighter and lighter. About six months ago the periods were only lasting for one
day. Since then they have been shorter and lighter, and no period occurred at all at the end of
the last two packs of pills. You have not missed any pills in the last six months (give the
information of progressive reduction in menstrual loss only in response to specific request
from the doctor).
•
No problems with sexual activity, usually active 3-4 times per week.
•
No recent nausea, vomiting, breast enlargement, or nipple discomfort (so nothing to suggest
a pregnancy).
•
No relevant past, medical, surgical, family or social history You have never had a curettage.
Questions to ask unless already covered:
•
'Does it matter if I don't have a period at the end of the pill month?'
•
'Will I be able to have a baby when I want to do so?'
Examination findings given to the candidate on request:
General and abdominal examination:
normal
430
Speculum examination:
normal
Pelvic vaginal examination:
uterus retroverted and of normal size and
mobility
Adnexae:
normal
080
Performance Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should convey the substance of what follows to the patient:
• The diagnosis is endometrial atrophy due to the progestogen component of the OCP
M
(Microgynon 30 ).
• There is no real problem with the progestogen-induced secondary amenorrhoea except for the
anxiety it produces in the patient about whether she is pregnant. When the oral contraceptive
pill is ceased, all will return to normal, including her fertility.
• A pregnancy is most unlikely but a p-hCG estimation should be done to confirm this for the
patient.
• If she is really worried about the amenorrhoea, the pill could be changed to either a
higher-oestrogen-containing pill (such as Microgynon 50®), or a triphasic pill (Triquilar®), and
the menstrual loss may increase. The other option would be for her to have a break from the
oral contraceptive pill and use some other method of contraception.
If the assessment of oestradiol, FSH, LH or prolactin levels is suggested, this would
suggest little or no insight into the cause of the amenorrhoea or the effect of the OCP on
these hormone test results.
KEY ISSUES
• Ability to diagnose the cause of amenorrhoea when on the OCP.
• Ability to counsel the patient appropriately.
CRITICAL ERROR
• Failure to perform a pregnancy test (/J-hCG) to exclude the unlikely possibility of a pregnancy
occurring whilst taking the OCP.
COMMENTARY
The reduction in the amount of of withdrawal bleeding whilst a patient is on the oral contraceptive
pill is not uncommon. The cause is due to a progressive endometrial atrophy (progestogen
-induced) over the period of time the patient is taking the pill. The key to the situation is generally
the history of gradual reduction of menstrual flow over a period of time prior to the complete
cessation of withdrawal bleeding. Whilst the likelihood of pregnancy is very low, a pregnancy test
is appropriate to reassure the patient — as conception is possible whilst a patient is taking the
oral contraceptive pill. Common problems likely with candidate performance are:
• Inadequate history concerning the progressive reduction in the menstrual loss whilst on the
OCP.
• Inadequate advice concerning the natural history of this symptom after cessation of the OCP.
431
081
Performance Guidelines
Condition 081
Positive culture for Group B streptococci (GBS) at 36 weeks of gestation in a
26-year-old woman
AIMS OF STATION
To assess the ability of the candidate to counsel a patient concerning the significance of the finding of vaginal GBS
organisms late in pregnancy and the subsequent management required.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You will be advised of the results of the recent GBS screening and what the doctor advises in regard to treatment. You
have no history of allergies to penicillin.
Questions to ask unless already covered:
•
'What are these GBS organisms?'
•
'Why are these bugs there?'
•
'Will these bugs do any harm?'
•
'Why don't you just give me antibiotics now and get rid of them?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should convey the substance of what follows to the patient:
•
The significance of GBS organisms in the vagina is:
~ the organism will not usually produce a problem for the mother, and 10-15% of
pregnant women may carry this organism, at this stage of the pregnancy;
~ the risk of the baby being colonised is 40-50%, if mother is GBS positive, and
delivers vaginally, and is not given antibiotics in labour;
~ the risk of the baby becoming 'infected' under the above circumstances is 1% but
this infection can be very severe;
~ by the time the neonatal diagnosis is able to be made clinically in the infant, it may
be too late to treat effectively and mortality is high; and
~ the important principle is therefore to prevent the baby getting infected.
•
GBS cannot be eradicated from the vagina with certainty by treating with penicillin or amoxycillin during
pregnancy.
•
Having found that she is GBS positive, it becomes important to treat the mother in labour, to prevent fetal
infection. Although a low risk situation, consensus best practice is to treat all GBS positive patients during labour.
Treatment with parenteral penicillin should be commenced in labour or if membranes rupture prior to onset of
labour. The antibiotic crosses the placenta and protects the baby. It is extremely unlikely that the baby will become
infected under such a regimen.
•
Some obstetric units only give antibiotics to 'high risk' patients in labour, such as those in premature labour, those
with premature rupture of the membranes, or where there is a maternal fever. Candidates should be aware that
such a management protocol does however put about 0.5% of babies at significant risk where the mother is GBS
positive.
432
081
Performance
Guidelines
• If allergic to penicillin, use erythromycin.
• Parenteral penicillin to the baby after birth is optional unless signs of infection ensue or in high
risk situations (such as prolonged ruptured membranes).
KEY ISSUES
• Defining the management plan.
• Counselling the patient as to why antibiotic treatment in labour is recommended.
CRITICAL ERRORS
• Failure to advise patient of the significance of GBS organisms to mother and her baby.
• Failure to advise antibiotic treatment of the pregnant woman if the membranes rupture, or
when labour commences, to protect the fetus from the risk of severe infection.
COMMENTARY
This case illustrates the now almost universal practice of routinely screening all pregnant women
at 34-36 weeks gestation for the presence of GBS colonisation of the vagina. It is important to
know that approximately 10-15% of pregnant women will be colonised with Group B
streptococcus organisms at this stage. The critical aspect of the management of this situation is
that antibiotics are given to the mother only when she presents in labour and not at any time
during the pregnancy when the colonisation is discovered. It is important to counsel the mother
that colonisation with this organism poses tittle, if any, risk to the mother but may affect the baby.
It is important to stress the serious significance of Group B streptococcal infection in the neonate.
Common problems likely with candidate performance are:
• Recommending administration of antibiotics during pregnancy (antenatally) and assuming
that such treatment would eradicate the GBS organism.
• Believing that treatment of an infected baby is so effective, that prophylactic antibiotic therapy
to the mother in labour is unnecessary.
• Believing antibiotic treatment of the mother is necessary now because of the adverse effects
GBS organisms will have on her.
433
082
Performance Guidelines
Condition 082
Vaginal bleeding after 8 weeks amenorrhoea in a woman with
previous irregular cycles
AIMS OF STATION
To assess the candidate's ability to appreciate the significance of vaginal bleeding in a woman with irregular
cycles where early pregnancy is a possibility.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient to reply to questions from the candidate as
follows:
•
You are a 25-year-old married woman without previous significant illness.
•
Your last menstrual period was eight weeks ago and was normal. Your periods are often irregular with
cycles varying between four and eight weeks duration.
•
You do not usually identify midcycle mucus to recognise the time of ovulation. You have noticed some
breast discomfort and nausea recently.
•
The current bleeding is minimal and bright in colour. It commenced yesterday spontaneously and is like
day two of the period. No tissue has been passed. The bleeding was not related to any sexual activity.
•
No abdominal or pelvic pain has been associated with the bleeding.
•
You use condoms for contraception. You would not mind if you were pregnant although you were not
planning to become pregnant for another couple of years. No previous pregnancies.
•
No past medical or surgical history of relevance. No medications.
•
Last Pap smear was six months ago and was normal. You have never had an abnormal smear test.
•
Your blood group is O Rh positive.
Questions to ask unless already covered:
•
‘Do you think I'm pregnant?'
•
'If I am pregnant, why am I bleeding? Will the baby be OK?'
•
‘Is there any treatment to stop the bleeding?'
Examination findings to be given to candidate on request
Patient looks well but is overweight (90 kg)
Blood pressure
120/80 mmHg
Pulse
70/min
Abdominal examination
no mass or viscus palpable, no tenderness
Speculum
cervix closed and normal; some minimal
blood loss
Pelvic vaginal examination
uterus is not obviously enlarged, and is
retroverted
Adnexae
434
normal, no tenderness
082
Performance
Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
The history needs to define the normal cycle regularity and length, enquire about pain, and
enquire about symptoms suggestive of pregnancy.
The candidate should advise along the following lines:
• The diagnosis is unclear from the history and examination. Investigations will need to be done
to confirm or exclude pregnancy and then define whether the pregnancy, if present, is
progressing satisfactorily.
An appropriate plan of investigations would be:
• β-hCG to check if pregnant.
• If β -hCG is negative, the diagnosis is just a late period, therefore observe. If periods remain
irregular, hormonal tests to see if fertility treatment is required may subsequently need to be
considered (such as FSH, LH, PRL, TFTs).
• If β -hCG is positive, check β -hCG level to assess usefulness of ultrasound examination.
• If β -hCG is positive and greater than 1000 U/L, she needs an ultrasound to check the site and
normality of the pregnancy, and the gestation and due date.
• When all of these results are known it will be necessary to review her. The prognosis regarding
the pregnancy can be discussed when it is known what the results are.
• If she is pregnant, the diagnosis is probably a threatened miscarriage, and no hormonal
therapy is likely to be of value.
KEY ISSUES
• Ability to evaluate a patient with bleeding after amenorrhoea.
• Ability to confirm or exclude pregnancy as a cause.
CRITICAL ERRORS
• Failure to consider non-pregnancy as well as pregnancy causes.
• Failure to arrange ultrasound if pregnant and β -hCG is greater than 1000 U/L.
COMMENTARY
This is a situation where bleeding occurs some eight weeks after a previous period but where the
patient often has an irregular cycle when amenorrhoea may last up to eight weeks. It is therefore
important to differentiate whether this woman could be pregnant, or whether she simply is having
one of her longer, irregular menstrual cycles. Therefore, symptoms suggesting pregnancy, and
tests for pregnancy, must be discussed in the management of this case. It is also important to
remember that where pregnancy is proven not to exist, further investigations for the irregular
menstrual cycles should be considered.
Common problems likely with candidate performance are:
• Failure to take an adequate history to define the previous menstrual cycle frequency and to
check for symptoms of pregnancy.
• Failure to describe appropriate management and investigative plans.
• Failure to advise appropriate endocrine tests if she is found to be not pregnant and the
irregular cycles persist.
435
2-G: The Psychiatric Consultation
Frank P Hume
'The care of the human mind is the most noble branch of medicine.'
Aloysius Sieffert (c. 1858)
A psychiatric assessment is a structured clinical conversation, complemented by observation and mental
state examination and supplemented by a physical examination and the interview of other informants when
appropriate. After the initial interview, the clinician should be able to establish whether the individual has a
mental health problem or not, the nature of the problem and a plan for the most suitable treatment. A
thorough initial assessment may take an hour or more to complete, but when time is short it may be
necessary to focus on the immediate problems at first and schedule a longer followup appointment to round
off the evaluation. In the context of the AMC assessment, with the time constraints imposed, the tasks are
split and focused to allow completion in the time period allowed.
For trust and rapport to develop, the clinician must display tact, empathy and genuine respect for the
individual's dignity throughout the interview. A private setting is crucial with comfortable seating and
ambience and freedom from interruptions. Confidentiality is central, given the personal and intimate nature
of the material to be talked about, but it is not absolute when the safety and interests of the patient or others
are at issue, or in medicolegal consultations.
Comprehensive and contemporaneous case notes are essential. Whenever possible, notes should be taken
during the interview rather than relying on recall afterwards. However note-taking should be delayed at the
outset until the patient feels that he or she has the clinician's attention. If the patient is highly anxious,
agitated, hostile or paranoid it maybe sensible to defer note-taking until after the interview and limit the
amount of factual information at the first interview.
Clinicians should begin by welcoming patients by name, introducing themselves if unknown, greeting
companions if the patient is accompanied and explaining how long they may have to wait and whether they
will be interviewed. It is usual to interview the patient alone first and other informants afterwards, with the
patient's consent. Let the patient know from the outset how long the interview is likely to take and that you will
be taking notes at some stage (which are confidential)
Begin with basic census data: contact details, education, occupation and languages spoken. If the interview
is to be conducted in a language other than English, then a trained health service interpreter should be
used rather than an accompanying relative or friend, depending on the sensitivity and intimacy of the
information to be gathered. Experienced interpreters will repeat patient's replies word for word, even if they
are obviously delusional or thought-disordered, whereas well-meaning relatives may paraphrase or
substitute replies to compensate for confused or disordered responses. When using an interpreter, direct
your attention and your enquiries to the patient and not the interpreter.
The interview should commence with the history of the presenting complaint by asking an open-ended
question such as 'please tell me about your problems in your own words'. The patient should then be allowed
to talk spontaneously and without interruption for several minutes, with the clinician maintaining appropriate
eye contact, paying attention to the factual content whilst simultaneously monitoring the patient's verbal and
nonverbal behaviour. Encouraging the patients to 'go on' or 'tell me more are simple strategies to put them at
ease, as are nodding, leaning forwards, expressing concern or repeating key
436
2-G
The Psychiatric Consultation
phrases, for example, ' s o y o u r s l e e p p r o b l e m h a s b e e n g e t t i n g w o r s e ? ' Avoid using
specialised language: for example, anorexia, insomnia, anhedonia. Comments which make
patients realise that they are being listened to and understood will increase their confidence and
deepen rapport.
As the interview unfolds, then more directive questions aimed at clarifying symptoms and their
evolution are used, asking for more specific examples of symptoms or experiences Interviewing
is an active and dynamic process: initial hypotheses or rough ideas are modified continuously as
more information is collected. When there is time pressure or urgency to make treatment or
admission decisions, then the clinician may need to be more active or directive from the
beginning and use more closed questions (requiring just 'yes' or 'no' answers)
Good clinicians should be able to:
• put an anxious patient at ease;
• gain sufficient trust to encourage an unwilling or suspicious patient to discuss relevant issues
by displaying tact, patience and encouragement:
• be comfortable, tolerant and empathie when a patient becomes tearful during the interview;
• know how to set limits if patients become angry, hostile or abusive;
• recognise and respect patient-clinician boundaries especially with dependent, disinhibited,
overfamiliar or adulatory patients;
• politely interject and refocus garrulous patients, explaining that because of time restraints it
may be necessary to break into their flow of conversation from time to time to concentrate on
the points that are important for planning treatment:
• rapidly identify patients who are demented, disorganised, disorientated, intoxicated, grossly
psychotic or dysphasic and for whom other informants will be imperative; and
• become aware of and monitor their own countertransference responses to particular patients.
By being aware of your own prejudices, weaknesses, blind spots and personal vulnerabilities,
and recognising when patients arouse strong feelings of anger, boredom sexual excitement or
' r e s c u e ' fantasies in you, you are accordingly less likely to react inappropriately to them
A psychiatric assessment differs from other medical interviews in that more attention needs to be
paid to the patient's psychological and social influences. Accordingly, patients' cultural and
spiritual backgrounds, formative influences, important relationships, significant life events and
their reactions to them; their attitudes, values and beliefs about themselves, other people and the
world may all be explored in the course of an assessment.
A vertical time line can be used to summarise key events in a person's life from what follows
(which is not comprehensive).
After the history of the present complaint has been established, then the family history should be
reviewed with a family tree or genogram developed as far back as the grandparents. The quality
of the relationship of each family member with the patient and its stability over time, parental
occupations, family status and atmosphere, familial diseases and illnesses, family psychiatric
disorders (and treatment) should all be recorded.
437
2-G
The Psychiatric Consultation
The patient's personal history may begin with conception, but there may have already been
significant family or parental events that have occurred that will influence their development and
shape their destiny (e.g. the prior death of siblings, maternal rape, incest, immigration, domestic
violence, IVF, the Holocaust).
•
•
Maternal pregnancy and birth: abnormalities, early development and nutrition, milestones.
Childhood milieu: separations, illnesses and hospitalisations: anxiety traits and behavioural
problems; education and schooling, learning difficulties, experience of bullying, examination
success and age of leaving school.
•
Adolescent pressures: puberty, peer groups, rebelliousness, drug and alcohol taking, fantasy
life, psychosexual identity and dysphoria, diet and exercise.
•
Occupational history in chronological order: training, competence, satisfaction, ambition,
experience in armed forces or war.
•
Marital history: length of courtship; age, occupation and personality of partner: quality and
stability of relationship, fidelity, previous relationships, divorce, separations, violence or
abuse.
•
Psychosexual development from childhood: sexual orientation, sexual dysfunction,
deviations or fetishes, satisfaction, current libido, contraception.
•
Children: stillbirths, miscarriages, terminations, childhood deaths, age, sex, health and
temper tantrums of the surviving children, attitudes to children and further pregnancies.
•
Past medical history: should include significant childhood illnesses which may have affected
brain development or function; operations, hospitalisations, accidents; menstrual or
menopausal symptoms and chronic physical illnesses including fatigue, eating disorders,
obesity, neurological disorders, head injury.
Previous mental health: includes self-harm, mood disorder, anxiety symptoms, somatic
concerns, behaviour disorders and insomnia, with details about treatment or not; duration
and severity of symptoms and periods of hospitalisation and outcome.
•
•
Use and abuse of drugs and alcohol: includes tobacco, caffeine, cannabis, stimulants,
sedatives, analgesics or narcotics and whether prescribed or not; and the chronological
history of use and the quantities involved and patterns of usage over time, attempts to give up
and their effects on health, relationships, work and finances. Gambling history should also be
explored.
•
Forensic history: includes delinquency, arrests, convictions, imprisonment, probation and
any history of violence, assault or property damage including fire setting and arson.
•
Current life situation: involves a description of family, housing, social, work and financial
circumstances. Relationships with neighbours, peers and colleagues, friends and relatives,
employers and superiors. Recent life stresses, bereavement, losses, disappointments,
promotions and the patient's reaction to them.
Personality refers to the habitual attitudes, behaviours and physical characteristics that define a
person as an individual to oneself and others. Psychiatric disorders may change a person's
personality, thus other informants, as well as the patient, can help to describe the following:
•
Attitudes to others: in social, family, work and sexual relationships.
•
Attitudes to self: e.g. vain, critical, self-conscious, realistic, self-critical.
•
Moral and religious attitudes: e.g. rigid, permissive, and rebellious.
•
Predominant mood: and whether stable or changing.
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2-G
The Psychiatric Consultation
• Leisure activities: hobbies and interests; creative, physical, solo or team.
• Fantasy life: includes daydreams and nightmares.
• Resilience: in the face of adversity.
It is neither essential nor desirable to enquire exhaustively about all of the above with each
patient. Common sense and experience should inform the clinician about what is relevant to each
patient as a picture emerges during the interview.
In structured assessments at undergraduate level, scenarios must be selective and
focused with clear aims and guidelines, to enable appropriate candidate assessment over
a brief eight minute doctor-patient encounter.
MENTAL STATE EXAMINATION
Mental state examination is a
History-taking deals with the past while mental state systematic review of the
examination is a systematic review of the patient's present patient's present symptoms
symptoms and observed behaviour during the interview. It is a and observed behaviour
cross-sectional view of the patient and is one of the essential during the interview. It is a
elements of psychiatric practice. The principles of the mental cross-sectional view of the
state assessment can readily be incorporated into the patient and is one of the
examination of any patient.
essential elements of
Recording mental state begins with:
Appearance and behaviour
psychiatric practice. The
principles of the mental state
assessment can readily be
A comprehensive, accurate and lifelike word-picture
of how the patient looks in terms of appearance, body size, incorporated into the
grooming,
dress,
posture,
movement
and
facial
expressiveness. Behaviour refers to cooperation, body language and gestures, psychomotor
function and general activity and social relatedness during the interview. Orientation, mood,
anxiety, hallucinations and medication may all influence appearance and behaviour.
Speech
The rate, volume, quality, quantity and tone of speech are recorded. Dysarthria or dysphasia are
noted. The form of the patient's talk is considered rather than the content: spontaneity,
pressure, slowness, hesitancy, coherence, looseness, response latency unusual sentence
construction e.g. Yoda the Jedi in Star Wars, neologisms (made up words), repetitions and
distractibility.
Mood and affect
Mood refers to a person's usual or longterm feeling state. Affect is a more short-term and
immediate feeling state and refers to what is observed by the clinician during the interview.
‘Mood is to affect as climate is to weather’. Clues to mood assessment arise from the patient's
appearance, mobility, posture and behaviour. Patients could be asked
How do you feel in yourself?' or
'What is your mood like?' or
‘How about your spirits?'
To assess depression ask about unhappiness, sadness, tearfulness, pessimism about the
present, shame or guilt about the past and hopelessness about the future.
439
2-G
The Psychiatric Consultation
To assess suicidal ideation, begin with the first question, and then progress tactfully:
'Have you ever felt so bad/desperate that you have wanted to end it all?'
'Have you ever thought of harming/or actually harmed... yourself?'
'Do you feel unsafe at the moment?'
'Do you feel desperate enough to kill yourself?’
' Do you think you are suicidal?’
'Do you have a 'Plan B'?'
Asking about suicidal ideation or plans does not make patients suicidal, nor does it put the idea
into their heads. Patients who are depressed and suicidal may be alarmed and frightened by their
thoughts and are relieved that someone cares enough to ask what they may be thinking about.
Most suicidal patients do not want to kill themselves and find the thoughts repugnant, but may feel
it is the only solution to their anguish. Some genuinely suicidal patients may deny being suicidal
when asked, because they are determined to succeed and do not wish to be thwarted or prevented
from doing so.
To assess elation or hypomania ask
'Do you ever/often feel in unusually good spirits?'
'Do you ever/often feel on top of the world or full of energy?'
'Do you ever/often get racing thoughts?'
'Do you ever/often go on uncontrolled spending sprees that leave you in debt?’
'Do you often feel unusually confident, inventive, fabulous or famous?'
Other mood states that may be specifically enquired about include anxiety, anger, irritability, envy,
suspiciousness and perplexity.
The range of mood should be described as normal, increased, labile, restricted or blunted. Also
note whether it is constant or stable.
Appropriateness of affect means that the current emotional expression matches what is being said
at the time.
Depersonalisation and derealisation experiences are difficult for patients to describe. They may
describe feeling unreal or detached, emotionless and numb, or as //'they are acting a part or being
like a robot. Alternatively they may describe their environment as colourless, lifeless, artificial or
cartoon-like. The feelings may vary from mild to severe, but are always seen as alien, unwanted
and unpleasant. All or any part of the body may be involved and the feelings may be intermittent or
persistent. They are usually accompanied by anxiety and/or depression.
Thought form
Abnormalities of thought can only be inferred from what patients say or write and may be
influenced by mood or psychosis. Depressed patients may have slowed speech with no rhythm or
cadence and only give limited or monosyllabic replies after a pause and with a limited range of
topics or themes. Manic patients speak very rapidly and their train of thought may shift repeatedly
(flight of ideas). They may be difficult to interrupt and their flight of ideas may be triggered by a pun
or a clang association — where the sound of a word is rhymed with another word midsentence to
produce a different set of ideas.
Loosening of associations is the classic formal thought disorder of schizophrenia. A patient may
say a lot but it is impossible to grasp the meaning of what is being said. Attempts to clarify with
followup questions often only deepen the puzzle, because there is a loss of the normal clarity and
structure of thinking. Examples of disorganised speech should be recorded verbatim.
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The Psychiatric Consultation
Circumstantiality infers a lengthy and garrulous response to a question, often to the extent that the patient forgets
what the question was. Obsessional patients may be anxious not to leave any doubt about their replies and qualify and
exhaustively explore every detail and nuance before they get to the point.
Tangentiality is an oblique or irrelevant response to a straightforward question.
Concrete thinking is a literal and restricted response to a basic question, for example, 'How
are you feeling today?'.................' With my fingers and toes, as usual! ' ........................... or1 You 're the doctor.
you tell me!'
Thought content
A delusion is a false belief which is out of keeping with an individuals educational, cultural, religious and social
background which is held with extraordinary and unshakeable conviction and absolute certainty. Subjectively, it is
indistinguishable from a true belief and it is not influenced by rational argument or evidence to the contrary. A delusion
may arise spontaneously (out of the blue), or be a secondary response to a patient's mood hallucinatory experiences
or false memories.
Paranoid (persecutory) delusions are the most common. Grandiose, guilty, nihilistic, jealousy, religious,
hypochondriacal, sexual, control, and referential delusions also occur. Specific delusions about one's thoughts,
involving either thought insertion, withdrawal or broadcasting are pathognomonic of schizophrenia.
An overvalued idea is usually a solitary abnormal belief which dominates a patient's life and causes disturbed
functioning and suffering to the person or others. The patient's whole life may revolve around this one idea (e.g.
anorexia nervosa, body dysmorphic disorder, transsexualism), and cause irreparable harm to significant relationships
in the patient's life.
Obsessions are recurrent, intrusive, irrational thoughts, impulses or images that persist despite efforts to exclude or
resist them. They are recognised as being self-generated and nonsensical and usually deal with issues that the patient
finds disturbing or unpleasant (e.g. dirt, germs, violence, sex, illness or religion).
Perception
Perception is the process of integrating input either from the sense organs or from imagery and fantasy (which are
self-generated). It is influenced by mood: mania heightens perception, particularly of colours; anxiety may intensify
sound; depression mutes sound and dulls colour. Schizophrenia may affect olfaction and taste.
An illusion is the misinterpretation of a real stimulus and is more likely to occur when attention and concentration are
unfocused, or when anxiety is high.
Hallucinations are false perceptions in the absence of a stimulus. They have the full force and impact of a real
perception and occur spontaneously and cannot be controlled or terminated by self-will. To patients, hallucinations are
normal sensory experiences. They may be simple: experience of bangs, rattles, whistles or flashes of light: or
complex: hearing voices, music, faces, animals or scenes.
Auditory hallucinations are characteristic of schizophrenia, but can also occur in alcoholism, amphetamine psychosis
and affective disorder. Voices in schizophrenia may be single or multiple; whisper or shout or speak in normal
conversational tone: give a running commentary on the patient's behaviour; argue with each other or appear to speak
or echo the patient's thoughts out loud. Usually the patient is referred to in the third person (he or she), but
occasionally commands and orders are given in the second person (you).
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The Psychiatric Consultation
In organic disorders and depressive states when voices are heard they may adopt an abusive or critical tone and use
the second person or simple words or brief sentences.
Auditory hallucinations may occur in normal individuals under stress (e.g. sensory deprivation, bereavement) and
when falling asleep or on waking up. Blind or deaf people may hallucinate images or sounds.
Visual hallucinations usually signify organic illness and are uncommon in schizophrenia. Substance abuse
(hallucinogens, glue, alcohol), neurological disorders affecting the visual pathways or the occipital lobe,
postconcussional states, temporal lobe epilepsy and various forms of dementia may cause visual hallucinations.
Tactile, haptic (touch-related) or somatic hallucinations may occur in acute psychosis and often have a bizarre
complexity. Perceptions of heat, touch, water dripping (or blood or bodily fluids); visceral sensations of severe pain
caused by 'knives' or 'demons': or of formication (the sensation of ants or insects crawling on or under the skin), have
all been described. They may be more indicative of benzodiazepine, cocaine or alcohol withdrawal. Olfactory and
gustatory hallucinations are rare, usually occur together and although they may occur in schizophrenia or depressive
disorders, are more likely due to temporal lobe phenomena or neurological lesions of the olfactory pathways.
Cognition
Cognitive function should be assessed briefly in every patient and interpreted in relationship to age, education and
intelligence. Orientation, attention, concentration and short-term, recent and remote memory should be tested. If
impairment is suspected or revealed, then a more structured and objective review of cognitive functioning, such as the
Mini-Mental State Examination, should be performed.
Insight
Insight refers to the self-awareness of morbid experiences (symptoms), and their effect on personal functioning and
relationships. It also encompasses attitudes to assessment, mental disorder and treatment. Insight is not simply
present or absent, but depends on the degree to which patients acknowledge, or are aware of. phenomena that other
people (including the clinician) have drawn to their attention. Insight depends next on the degree to which patients
recognise that the phenomena are abnormal, or may have a psychological or psychiatric cause, and finally whether
patients are willing to have treatment or be hospitalised. In psychotic disorders, insight is usually absent or partial at
best.
Rapport
Rapport refers to the degree of relatedness between the patient and the clinician during the interview and is a
measure of the quality of the communication and trust achieved. Difficulty in establishing rapport may be symptomatic
of the patient's illness or the clinician's countertransference and lack of empathy. Rapport predicts whether a patient
will engage in and continue treatment.
Risk
Depending on the circumstances, the clinician's assessment of the patient's suicidalityand risk of violence to others
should be noted and then acted upon, if appropriate.
Reliability
Whenever there is any doubt about the veracity of the patient's account of symptoms or behaviour change and other
autobiographical details, other informants should be interviewed
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The Psychiatric Consultation
to corroborate the history. This applies particularly to patients who are cognitively impaired, disorganised, intoxicated,
significantly thought-disordered or affectively distressed.
THE MINI-MENTAL STATE EXAMINATION (MMSE)
The MMSE was developed by Marshal Folstein and colleagues from the Johns Hopkins School of Medicine in
Baltimore. Since its publication in 1975 it has become the most commonly used instrument for bedside cognitive
function screening. Its purpose is not to make a diagnosis, but to indicate the presence of cognitive impairment due
to delirium, dementia or head injury. It is brief, easily administered, has high inter-rater reliability and may be used to
monitor progress or fluctuations in these disorders.
The thirty items in the MMSE measure orientation, attention, registration (immediate memory), recall (short-term
memory), language and visuo-spatial function
Performance in the MMSE is affected by age; years of education; socioeconomic status; ethnicity and whether English
is the first or second language. Better educated people may score well on the test despite having significant cognitive
impairment.
Scores of 25-30 out of 30 are considered normal; 18-24 indicate mild to moderate impairment and scores of 17 or less
indicate severe impairment. Once patients reach the more advanced stages of disease or dementia, their scores are
so low that progression cannot be assessed.
The MMSE was developed primarily to quantify cognitive functioning in elderly patients with delirium and
dementia and may not be reliable in every patient in all situations. It may be useless at detecting focal
cerebral lesions (aphasia, amnesia), right hemisphere disorders and frontal lobe deficits.
It is essential to consider the performance profile of the subsets of the test as well as the overall score. Patients with
Alzheimer disease may perform worst on recall, orientation and drawing, whereas subcortical dementias may primarily
affect attention and concentration.
The MMSE may be supplemented by specifically testing frontal lobe functioning via
• verbal fluency tests: for example, naming as many words as possible in one minute starting with the letter F, then
the letter A, then S. Normal is 15 words per letter or 30 words in total for the three. Once again allowance must be
made for age, education, ethnicity and command of English. Alternatively ask for as many examples as possible
from semantic categories: such as animals, fruit or vegetables in one minute (10 or less abnormal); or list as
many items as possible that can be bought in a supermarket (15 or less is abnormal);
• The interpretation of proverbs or sayings: for example, a bird in the hand is worth two in the bush', 'a stitch in
time saves nine]
• similarities and differences: e.g. apple and banana, table and chair, child and dwarf, ice and glass: and
• motor sequencing tests: either rapidly alternating hand movements or the Luria three-step hand movements:
fist-edge-palm; are all easily incorporated adjuncts to a more comprehensive screen of frontal lobe function.
Patients with frontal lobe dysfunction score poorly, perseverate and become disorganised under the time pressure
of these simple tests.
Frank P Hume
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The Psychiatric Consultation
MINI-MENTAL STATUS EXAMINATION (MMSE) 1
Date of Examination: Name:
Sex:
Date of Birth:
Handedness:
Occupation (previous):
Educational Level: General
Remarks Hearing: Vision:
Record exact replies. Enter the scores out of the maximum shown. No half marks awarded.
1. Orientation
What is the
Year?
Season?
Date?
Month'?
Day of the week7
Where are we
7
State
City
Suburb
Hospital
Floor (if at home, the street number and name)
2. Registration
Name three objects, taking one second to say each, then ask the patient to repeat them.
e.g. Apple
Table
Coin
Repeat them until the patient learns all three.
Ask patient to remember them
Number of trials required to learn the answers
3. Attention/Concentration
(a)
Serial Sevens (take 7 serially from 100 -» 93; 86; 79; stop after five
answers): deduct one mark per error
Or
(b)
Spell WORLD backwards (e.g. dlrow = 5, drolw = 3)
4. Recall
Ask the patient to name the three objects in Question 2
1Adapted from Folstein M.. Folstein S. and McHugh P.. 1975. J. Psychiatric Research 12 pp 189-198.
444
5. Language
(a)
Ask the patient to name the following as you point: 'pen'.... 'watch
(b)
Have the patient repeat: 'No its. ands, or buts
(c)
Have the patient follow a three stage command:
/2
/1
1
/3
Take this paper in your right hand. Fold the paper in half.
Put the paper down in your lap'.
(d)
Have the patient read and obey the following: CLOSE YOUR EYES
/1
(e)
Have the patient write a sentence (containing subject, verb, object)
/1
6. Construction
Ask the patient to copy this design
/1
Score = /30
445
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The Psychiatric Consultation
2-G
The Psychiatric Consultation
Candidate Information and Tasks
MCAT 083-089
83
Medication changes for a 35-year-old woman with chronic schizophrenia
84
Demand for urgent treatment for 'sudden hair loss' from a 29-year-old man
85
Poor work performance in a 30-year-old female police officer
86
Lifestyle stress in a 45-year-old man
87
Binge drinking in a 25-year-old man
88
Nausea, headache and feeling 'jittery' in a 30-year-old bank clerk
89
Collapse of a 30-year-old woman on the way to a court attendance
446
083
Candidate Information and Tasks
Condition 083
Medication changes for a 35-year-old woman with chronic schizophrenia
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. A longterm patient of the practice has attended for a
repeat prescription of thioridazine (Melleril®). The patient is a 35-year-old woman who has been
receiving thioridazine 200 mg daily for chronic schizophrenia over the past 15 years. Due to
recent adverse publicity and concern about the effects of longterm thioridazine on cardiac
conductivity (as reflected in a prolongation of the corrected QT interval on the ECG), you wish
to change her to a newer atypical antipsychotic.
Before doing so, you will need to discuss with her the risks and benefits of her current treatment
and the risks and benefits of the commonly available atypical antipsychotics.
YOUR TASKS ARE TO:
• Explain your concerns about continuing on thioridazine.
• Educate the patient about the risks and benefits of the newer atypical
antipsychotics.
• Explain the side effects of the most common atypical antipsychotics.
• Respond appropriately to the patient's questions.
There is no need for you to take any further history from the patient.
The Performance Guidelines for Condition 083 can be found on page 456
447
084
Candidate Information and Tasks
Condition 084
Demand for urgent treatment for 'sudden hair loss' from a
29-year-old man
CANDIDATE INFORMATION AND TASKS
You are the duty Hospital Medical Officer (HMO) in a busy city hospital clinic attached to the Emergency
Department. It is early evening.
The patient you are about to see is a neatly dressed, well-groomed 29-year-old man who has brought an envelope
containing some hair strands to the front desk, asking if they can be 'examined under a microscope'. He appeared
to be guite anxious and restless whilst waiting to be seen by you and the triage nurse has told you that he has
visited the toilet facilities for lengthy periods of time on several occasions.
The triage assessment states that he is worried that he is suddenly going bald because he has begun to lose his
hair. He has brought some of his hair to the hospital to be examined to find out what the problem is and have
treatment urgently' because he believes that his hair loss is affecting his 'prospects for promotion at work'.
He is single and lives at home with his parents. He has worked as a financial analyst in a merchant bank for the
past six years. He admits to not having any social life and is a nonsmoker and nondrinker.
He appears to have a normal full head of hair as illustrated below.
YOUR TASKS ARE TO:
•
Establish rapport.
•
Take a sensitive, focused and relevant history.
•
Reach a diagnostic conclusion, and discuss this with the patient.
•
Discuss management briefly with the examiner.
CONDITION 084. FIGURES 1 AND 2.
The Performance Guidelines for Condition 084 can be found on page 459
448
085
Candidate Information and Tasks
Condition 085
Poor work performance in a 30-year-old female police officer CANDIDATE
INFORMATION AND TASKS
You are working in a general practice. The patient is a 30-year-old Police Officer who has been
advised to seek medical help by the human services officer (staff counsellor), for the State Police
Service. The Police Service has become concerned that she does not appear to be functioning
1
as well in the workplace. She has been having an increasing number of sick days, which are
often on the first day of a new set of rostered shifts.
YOUR TASKS ARE TO:
• Take a focused history — you have six minutes to do this.
• Inform the examiner of the three most likely diagnoses.
• Answer questions from the examiner about one or more of these diagnoses
The Performance Guidelines for Condition 085 can be found on page 463
449
086
Candidate Information and Tasks
Condition 086
Lifestyle stress in a 45-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. The patient has come to see you after having insurance medical
examinations at work. It was recommended that he see a general practitioner, to monitor his general health, and
that he may be 'just stressed'. He did not really think of being a 'stress type' before now, and has no symptoms
except for headaches towards the end of the day. Other family members attend your practice, but this patient has
not previously consulted you.
The patient has been told that cholesterol, blood sugar, and resting ECG are normal, but on two occasions in the
last month when tested by the insurance doctor, the BP reading was high (160/80 mmHg) but eventually settled to
normal levels. On those days, the patient had come from particularly difficult meetings.
The patient is upset by these findings, believing that he has always been in perfect health. The insurance doctor
said 'there was nothing to be concerned about really', but now he is worrying about having a heart attack and can't
get that out of mind over the past couple of nights. This worry has been reinforced by several episodes of stabbing
chest pain each lasting only a few seconds, unrelated to exertion. Last night he took a sleeping tablet, normally only
used on long plane trips, to get some sleep, and feels much better now—the patient is now thinking he may have
been suffering from stress over the past couple of years.
You have obtained the information as listed below in the patient profile, and you have just completed examining the
patient, including performing an ECG. No abnormality has been found. Blood pressure today is 130/70 mmHg.
Patient profile
Marital status
Household
Occupation
Smoking habits
Alcohol use
Drug sensitivities
Family history
Married, wife an artist
Wife, three teenage children
Finance Manager
3-5 cigarettes daily
two whiskies/sherries most nights
Not known
Eldest of five siblings, all alive and well. Father died aged 65
of a heart attack; mother alive and well, although a worrier
Past medical history
Major continuing
health problems
Current medication
No serious illnesses or operations
450
•
None known
None
086
Candidate Information and Tasks
YOUR TASKS ARE TO:
• Discuss his health condition and relevant matters with the patient.
• Advise the patient of your diagnosis and proposed management.
• Answer any questions the patient asks you.
The Performance Guidelines for Condition 086 can be found on page 466
451
087
Candidate Information and Tasks
Condition 087
Binge drinking in a 25-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. This patient is well known to you. He is a 25-year-old sole parent of a
six-year-old girl — the mother left soon after the girl's birth and there has been no contact since. The patient works
full time as a local delivery truck driver.
•
He regularly drinks heavily at the weekends.
•
•
He intermittently presents on Monday 'feeling seedy' requesting a certificate for the day off.
He is otherwise in good health, but has had frequent presentations for minor sporting injuries.
•
He is not taking any medication; smokes 10 cigarettes per day; there is no other drug history.
•
He does not have any history of psychiatric illness.
•
•
He is generally a good and caring parent — he has no other regular help with child-care.
His relationship with his family is strained — they blame him for his wife leaving.
•
His father was a violent, heavy drinker during the patient's childhood, and still drinks, but not to excess.
The patient came to the practice today for the removal of sutures to a small scalp laceration, well-healed, sustained
eight days ago in a fall at the pub after the football. He was briefly unconscious.
He was taken, intoxicated to the Emergency Department of the local hospital at 1:00 am eight days ago, the wound
was repaired and he was discharged several hours later. Your nurse has just removed the sutures. She has alerted
you to discuss the patient's drinking and parental responsibilities.
YOUR TASKS ARE TO:
•
Discuss with this patient his pattern of drinking and its harmful consequences.
•
Make appropriate recommendations for dealing with the problem.
The Performance Guidelines for Condition 087 can be found on page 470
452
088
Candidate Information and Tasks
Condition 088
Nausea, headache and feeling 'jittery' in a 30-year-old bank clerk
CANDIDATE INFORMATION AND TASKS
Your next patient is a 30-year-old bank clerk, who is consulting you in the Emergency
Department of a general hospital. She is complaining of severe nausea, headaches and the
'jitters'.
She attended here two days ago. Brief notes in the Emergency Department patient record state
that she was then complaining of back pain which was diagnosed as 'muscle pain'. The notes
also state that she had been taking the selective-serotonin-release-inhibitor (SSRI) Prozac®
(fluoxetine) 20 mg daily for depression for three weeks on the advice of her local doctor, without
much improvement. An alternative SSRI —Zoloft® (sertraline) 100 mg daily was prescribed when
she attended the Emergency Department.
YOUR TASKS ARE TO:
• Take a further focused history related to this situation.
• Ask the examiner for the appropriate examination findings you require to assist in
diagnosis.
• Inform the examiner of your diagnosis.
• Counsel the patient about the likely cause of her symptoms, their treatment, and what you
recommend with regard to further management of her depression.
The Performance Guidelines for Condition 088 can be found on page 474
453
089
Candidate Information and Tasks
Condition 089
Collapse of a 30-year-old woman on the way to a court attendance
CANDIDATE INFORMATION AND TASKS
This patient was brought to the Emergency Department complaining of a sudden inability to
walk. She had collapsed on the way to court where her husband was due to appear on fraud
charges. The charges related to embezzlement to cover the husband's gambling debts.
She is a 30-year-old housewife who was fully active yesterday and carrying out her everyday
life up until this morning. You have reviewed the case and found the patient presented with a
similar condition a year ago at the time the fraud was first alleged. At that time, she was
admitted to hospital, and investigations including computed tomography of the spine and head
were reported as normal. After two weeks in hospital she recovered the ability to walk.
YOUR TASKS ARE TO:
•
Examine the lower limbs with attention to the neurological system — you have six
minutes to complete your examination.
•
Report your findings to the examiner as you proceed. Also take note of the patient's
general behaviour and demeanour.
•
Answer the questions which the examiner will ask you about this problem.
• Provide a likely diagnosis to the examiner, and give your reasons for selecting the
diagnosis.
The Performance Guidelines for Condition 089 can be found on page 478
454
2-G
The Psychiatric Consultation
2-G The Psychiatric Consultation
Performance Guidelines
MCAT 083-089
083 Medication changes for a 35-year-old woman with chronic schizophrenia
084 Demand for urgent treatment for 'sudden hair loss' from a 29-year-old man
085 Poor work performance in a 30-year-old female police officer
086 Lifestyle stress in a 45-year-old man
087 Binge drinking in a 25-year-old man
088 Nausea, headache and feeling 'jittery' in a 30-year-old bank clerk
089 Collapse of a 30-year-old woman on the way to a court attendance
455
083
Performance Guidelines
Condition 083
Medication changes for a 35-year-old woman with chronic schizophrenia
AIMS OF STATION
To assess the candidate's ability to explain the need for antipsychotic medication change.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a 35-year-old woman with chronic schizophrenia characterised by chronic paranoid delusions about being
'spied upon by people who live in your roof cavity'. Occasionally you can hear them whispering amongst themselves
or 'operating a computet system that enables them to track you with electromagnetic radiation '.
Although you live at home with your aging parents, you are socially isolated and rarely go out. You have been taking
thioridazine under protest for 15 years and your condition is relatively stable. You have only limited insight into your
illness. You are convinced that a family does live in your roof and you only take medication because your mother
supervises this and insists that taking medication daily is a condition of you continuing to live at home. You cannot
realistically move out, as you cannot afford to live anywhere else. Your only income is the disability support pension.
Your weight is 66 kg and your height is 1.5 metres (BMI 29 kg/m2).
You are attending your general practitioner to receive a repeat prescription of your thioridazine (Melleril®). It is a
drug that has given you a mild dry mouth, blurred vision and constipation for years, so that when the doctor tells you
it is time for a change, you are relieved, but sceptical — unconvinced that you need medication at all.
Listen carefully to what the doctor says about the new medication options and respond appropriately depending on
what is said.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should advise the patient of the need for medication change by appropriately:
•
Outlining recent evidence linking her current medication with potentially life-threatening arrhythmias.
•
Describing the benefits and side effects of alternative medications.
•
Obtaining informed consent for medication change.
•
Outlining the management plan as detailed in the commentary.
•
Responding to patient's queries.
KEY ISSUES
•
Explanation of risks of continuing current medication.
•
Explanation of benefits and side effects of recommended alternative medications.
•
Monitoring and followup during medication changeover.
456
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Performance Guidelines
CRITICAL ERROR - none defined
COMMENTARY
In 2002, Australian prescribers were alerted to the recently established link between thioridazine and prolongation of
the QTc interval of the heart. There is a danger of life-threatening ventricular tachycardia if the QTc interval is longer
than 500 milliseconds.
Pre-existing cardiac pathology, electrolyte abnormalities, thyroid disease, cerebrovascular disease, severe
bradycardia and many commonly prescribed drugs may all lengthen the repolarisation phase of the ventricular
myocardium, which could trigger the polymorphic tachycardia known as torsade de pointes.
This arrhythmia is usually self-terminating but can progress to ventricular fibrillation or sustained tachycardia.
Dizziness, syncopal episodes, cardiac arrest or death may result. Blockade of cardiac potassium channels may be the
mechanism and genetic factors may play a part. Women are at greater risk.
Thioridazine has also long been known to cause lenticular opacities when used in high dosage for long periods. But it
is the anticholinergic effects which cause most subjective discomfort. Sedation, postural hypotension and weight gain
are other well known side effects. Extrapyramidal toxicity with thioridazine is uncommon, but not rare.
Since 1992 there have been several atypical antipsychotic drugs available for prescription in Australia. They are
'atypical' in the sense that their mechanism of action is not solely to block CNS dopamine D2 receptors and they are
thus less likely to cause tardive dyskinaesia or other extrapyramidal syndromes. Their efficacy is equivalent to
conventional 'typical' antipsychotics.
The most important emerging side effects of the atypical agents are weight gain, metabolic disturbances and
hyperprolactinaemia. Risperidone, olanzapine, amisulpride and quetiapine are available for prescription on the
Pharmaceutical Benefits Scheme for schizophrenia.
Weight gain liability is not confined to the atypicals, but olanzapine, quetiapine and risperidone (of the drugs
available for prescription by general practitioners) are associated with faster and greater weight gain than typical
antipsychotics. Adolescents may be particularly susceptible to this side effect. Weight gain is not dose-dependent, but
patients who were relatively underweight prior to treatment may put on the most weight.
The mechanism of weight gain may be blockage of the histamine H, receptor (which also causes sedation) and
antagonism at 5HT2A receptors, as well as impaired feedback of the adipose tissue-leptin loop.
There is an increased risk of Type 2 diabetes mellitus in patients with schizophrenia independent of treatment, but
weight gain and inappropriate dietary choice increase the risk further. Atypical antipsychotics, particularly olanzapine,
heighten the prevalence of Type 2 diabetes especially in overweight or obese patients, by increasing insulin
resistance. The risk is less with risperidone and quetiapine.
Triglyceride levels, but not cholesterol, may also be significantly increased by olanzapine. Data about other atypicals
are limited.
457
083
Performance Guidelines
Hyperprolactinaemia is a well known side effect of typical antipsychotics due to removal of inhibition of prolactin
secretion by hypothalamic dopamine receptor blockade. Risperidone, of the atypical antipsychotics, has the greatest
risk of hyperprolactinaemia and hence amenorrhoea, galactorrhoea. decreased libido, impotence and anorgasmia.
Prolonged uninhibited prolactin release may cause hypogonadism and decreased oestrogen and testosterone
secretion, which in turn increases cardiac morbidity and osteoporosis, and gives an increased risk of breast cancer.
Hyperprolactinaemia, however, is a laboratory finding and is not always associated with clinical symptoms.
Clozapine is the atypical antipsychotic with the most adverse side effect profile, including agranulocytosis, but it is
available only through specialist clinics.
Amisulpride is the atypical antipsychotic most likely to cause extrapyramidal side effects, although it is claimed to
preferentially block limbic dopamine receptors rather than those in the striatum.
The decision to change a patient from a typical to an atypical antipsychotic depends on the risk/benefit ratio. A
patient on typical antipsychotics, who is stable and whose symptoms have reached equilibrium with minimal side
effects, should not necessarily be changed to an atypical agent just because there is a choice. There is an increased
risk of relapse requiring hospitalisation during the changeover period and patients need to be warned of the above
major side effects.
Lifestyle and dietary advice, weight monitoring and an agreed exercise program are all essential elements of the
preswitch counselling process. Baseline weight, body mass index, blood pressure must be measured as well as a
12-lead ECG. thyroid function, fasting blood sugar and lipids, prolactin, full blood count, electrolytes, urea, creatinine
and liver function tests.
Once the decision has been made to change a patient from one antipsychotic to a new one, then for a nonacute
patient, a crossover period of 1-2 weeks is recommended by reducing the dose of the previous medication and
gradually increasing the dose of the new medication. Patients and caregiver need to be alert to the 'early warning
signs' or relapse signature' symptoms which herald the return of acute psychosis.
Nonspecific discontinuation symptoms may persist for several weeks after changeover. These include: nausea,
headache, restlessness and an influenza-like syndrome.
In this patient, because of the length of time on a typical antipsychotic, any change toa newer atypical agent may
require dose-titration over several weeks and doses towards the higher end of the therapeutic range may be
necessary.
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Condition 084
Demand for urgent treatment for 'sudden hair loss' from a 29-year-old
man
AIMS OF STATION
This is primarily a diagnostic and communication skills station, assessing the candidates ability to take an empathie
and relatively quick psychosocial history and to rapidly reach the correct diagnostic conclusion.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a 29-year-old financial analyst in a large city merchant bank. It is a competitive environment. You have been
with the company for six years since graduation from university, but your career progress has stalled. Although you are
conscientious and reliable at work, it is three years since your last promotion. Fellow cadets from your intake cohort
seem to have left you behind. You have just had a performance appraisal interview and have once again been passed
over for promotion. Your explanation for this is that you are losing scalp hair and must be going bald and that it is your
hair loss that has cost you your promotion.
Since your adolescence you have been concerned about your appearance and grooming. It began with a belief that
your face was asymmetrical which you believed was obvious to other people and this led to you checking your facial
features in a mirror several times a day. Then you began to notice facial skin flaws and different shades of
pigmentation. If you developed a pimple or shaving rash you would touch, pick at and constantly inspect the lesion in a
mirror on an hourly basis.
Checking your facial appearance on a regular basis during the course of a day has now become part of your daily life.
Each mirror checking episode lasts several minutes with you having to reassure yourself that no new blemishes have
appeared or that any existing blemishes are improving or fading. Whilst at work you can only do this every two hours
for a few minutes, but at home and on weekends it may take you at least half an hour to complete a thorough
inspection of your entire head and face region, which you repeat three times a day. If asked, you will concede that the
total amount of time you spend checking your appearance in front of the mirror, touching, examining and picking at
almost every skin pore or hair follicle, could be four hours a day on weekends. The amount of time you spend
monitoring your appearance is slowly increasing.
You still live at home with your parents, who are both school teachers approaching retirement. Your mother suffered
from agoraphobia during her twenties before her marriage. They have become accustomed to you constantly asking
them 'Howdo I look?' or, 7s there something wrong with my face/skin/mouth/eyes/hair?' Their unfailing reassurance
that there is nothing wrong with your appearance does not reduce your concerns as you are sure they are only saying
that to humour you.
In the past decade, you have spent a small fortune on male beauty treatments, face packs, facial massages, hair
styling and allergy-free soaps, shave creams and cosmetics in an attempt to treat or camouflage your skin defects. It is
your main interest. Your concern for the care of your skin means that you do not like to socialise at parties or clubs
where people may smoke. You avoid crowds and public transport to avoid embarrassment of strangers
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subjecting your features to close scrutiny. You avoid direct sun exposure. You do not smoke or
drink alcohol.
Over the past few months you have been monitoring the number of your scalp hairs you have
found on the floor of the shower cubicle after a shower. Although it may only be one or two, you
have come to believe several things. The first is that the cumulative loss of hairs means that you
are going bald and that the resultant change in your hair density and thickness is obvious to other
people. You are certain that this obvious hair loss has influenced your employers not to promote
you because to have employees with thinning hair is not good for the bank's image when dealing
with clients.
Finding out that you have yet again not been promoted has driven you to seek advice, about
diagnosis and treatment for your hair loss. As you do not trust your family general practitioner,
who has dismissed your concerns and said there is nothing wrong, you have sought a second
opinion from an unbiased doctor at the city hospital closest to where you work.
How to play the role
You must be neat, well dressed and have a full head of hair. You will have an envelope with a
7
couple of strands of your hair in it. You will be anxious and somewhat irritable. If there is a mirror
in the consulting room, then insist on showing the doctor your 'receding hair line' at an early stage
of the interview. (It would be useful to have a small mirror as a prop)
Opening statements
•
•
•
•
‘Doctor, you've got to find out why I'm losing my hair!'
‘I want these hairs of mine examined under a microscope by a specialist! '
'Let me show you where I'm going bald'.
'You've got to do something!'
Your subsequent behaviour and emotional reactions will be shaped by the way the interview
unfolds. If the doctor rushes to judgment and dismisses your concerns without tact, empathy or
appropriate discussion, then your irritability and exasperation may increase.
If the doctor realises what your underlying problem is. effectively establishes rapport, and the
extent of your difficulties and hypochondriacal concerns is realised, then be defensive and
sceptical, but be prepared to listen and interact appropriately.
Do not willingly volunteer history of your rituals or checking behaviour until asked. These have
been behaviours you have kept secret for years, but you may be relieved that at last someone is
able to encourage you to talk about them.
After six minutes, the examiner will interrupt the consultation and ask 'What is your provisional
diagnosis? Describe briefly possible management plans to me. '
EXPECTATIONS OF CANDIDATE PERFORMANCE
The patient has a form of Body Dysmorphic Disorder (BDD) presenting with the conviction of
impending baldness, when objectively and clinically, there is no supporting evidence.
BDD is a form of hypochondriasis which is part of the anxiety disorder spectrum. In this instance
there are many obsessive compulsive disorder features. BDD is a condition that affects about 1%
of the population, but is infrequently diagnosed because of the lack of awareness by clinicians
and patients' secrecy about their bodily preoccupations.
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The candidate will be expected to establish the diagnosis, the associated behaviours and the
complications in this case, as well as being aware of the common comorbid psychological
disorders. Knowledge about the effectiveness of the serotonin reuptake inhibitor antidepressants
and cognitive behavioural therapy in this condition would be desirable.
Key questions the candidate should ask of the patient would be:
• 'Apart from your hair, have you ever been very worried about your appearance in any other
way?'
• (If yes): 'Can you tell me what your concern was?'
• 'Did this concern preoccupy you? Do you think about it a lot and wish you could worry about it
less?'
• 'What effect has this preoccupation with your appearance had on your life?'
• 'Has it affected your social life, family relationships, friends, job or other activities?'
• ‘Do you wish to do anything about your concerns?'
KEY ISSUES
• Ability to take a focused psychosocial history and to come to an appropriate diagnosis.
• Ability to communicate with a patient with body dysmorphic disorder.
CRITICAL ERRORS - none defined
COMMENTARY
'Body Dysmorphic Disorder, or dysmorphophobia, is a chronic preoccupation with an imagined
defect in one's appearance. Even if a slight physical anomaly is present, the person's concern is
markedly excessive. The preoccupation causes significant distress or impairment in the person s
social, occupational and other important areas of functioning.
Typical complaints commonly involve imagined or slight flaws of the face or head such as thinning
hair, acne, wrinkles, scars, vascular markings, paleness or redness of the complexion, swelling,
facial asymmetry or disproportion or excessive facial hair.
Other common preoccupations include the shape, size or some other aspect of the nose, eyes,
eyelids, eyebrows, ears, mouth, lips, teeth, jaw, chin, cheeks or head. Any other body part may be
the focus of concern (the genitals, breasts, buttocks, abdomen, arms, hands, feet, legs, hips,
shoulders, spine, overall body size or body build and musculature).
The preoccupation may focus simultaneously on several body parts and although it may be often
specific: 'a hooked nose'; it may also be vague: 'a flat chest'; or general: 'I'm just ugly'.
From Diagnostic and Statistical Manual 4 - Text Revision
Most individuals with this disorder experience marked distress over their perceived deformities.
They find their preoccupations difficult to control and may make little or no attempt to resist them.
Many hours of the day may be spent thinking and worrying about their 'defect' and these thoughts
may dominate their lives, leading to significant impairments in functioning and avoidance of work,
social and public situations. Repetitive and
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time-consuming behaviours are undertaken to reduce their distress, which have no or only minimal benefit.
Reassurance that there are no visible defects has no lasting effect on their abnormal beliefs.
The core irrational belief in BDD is that the person is somehow defective and unattractive and this is accompanied
by low self esteem, shame, embarrassment and fear of rejection. The condition is common if it is looked for and
asked about.
The most common associated behaviours are mirror-checking, touching, comparing the defect' with other people's
body parts either directly or with pictures in magazines, excessive grooming, camouflaging, constantly seeking
reassurance and questioning others about their alleged defects or ugliness and then seeking dermatological or
cosmetic surgical treatments.
Social impairment is the norm. They are socially avoidant and will not willingly visit restaurants, shopping centres,
beaches or go to parties or functions because of their self-consciousness about their appearance. Insight is usually
poor or partial and their beliefs may become delusional. It is their self-referential ideas, i.e. that other people are
taking special notice of their 'defect' and will talk and gossip and laugh about it, that contribute to their social isolation
and intensify their suffering to the point of despair, self-harm and sometimes suicide.
Psychiatric comorbidity is universal. Major depression is the most common (60%) but social anxiety/phobia,
obsessive compulsive disorder, substance abuse and avoidant personality disorder are highly prevalent.
There is a roughly equal sex incidence and similar clinical features. Perhaps women are more likely to focus on their
skins, lips, and weight, whereas men are more preoccupied with overall physique, their genitals and hair loss or
excess. The condition typically begins in adolescence, but may not present or be diagnosed until the thirties. The
course is chronic and relapsing.
Most patients with BDD seek costly dermatological or cosmetic surgical consultations and treatments, but remain
dissatisfied with the results. They may then become litigious or violent. Rarely patients perform their own
procedures after consulting internet web sites.
Management
The specific serotonin reuptake inhibitor antidepressants and clomipramine are often effective. The dosages need
to be in the higher range and it may take three months to get a response, but 70% of patients report improvement.
Augmentation with antipsychotics may increase the response rate. Treatment must be continued longterm as
relapse is common if treatment is discontinued.
Cognitive behavioural treatments including psychoeducation, cognitive challenge and restructuring, exposure and
response prevention, as well as anxiety management training, can supplement drug treatment and increase
response rates to over 80%. Severe comorbid depression may need hopitalisation and/or lithium carbonate
augmentation with antidepressants.
Trying to convince patients with entrenched ideas that their beliefs are irrational or that they look normal is unlikely to
persuade them to accept psychiatric treatment or referral. With the patient's consent, family involvement in
psychoeducation and treatment planning and supervision of response prevention strategies and the removal of
mirrors from the family home may be valuable.
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Condition 085
Poor work performance in a 30-year-old female police officer
AIMS OF STATION
To assess the ability of the candidate to diagnose a stress-related depression associated with
increased alcohol intake.
To assess the ability of the candidate to determine when and why the problem started, and what
the ramifications of the problem might be at this time or in the future.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You do not wish to be examined by the candidate and resent having been advised to see the
general practitioner by the Police Service's staff counsellor. You should present as anxious and
initially reluctant to admit that you are having difficulties at work. When the candidate questions
you further, answer the following or similar questions directly, but volunteer additional information
only if appropriately led.
• After candidates introduce themselves, insert the following into your first answer to them: ‘I
didn't really want to come today. I am only here because the Police Service
thinks I have a problem. '
• If you are asked if there are any problems at work, at first say: ‘I d o m y j o b w e l l — t h e r e
have been no complaints about what I do at work. '
• You are a police constable with a variety of service attachments in the field and at office tasks.
• You live alone. No current romantic relationships. ‘Too b u s y a t w o r k . '
• Your family is interstate.
• You have l o t s o f f r i e n d s ' , but haven't seen them much lately.
• Been ill? ' N o t t h a t m u c h m o r e t h a n o t h e r s . I ' v e h a d s i x d a y s o f f i n t h e l a s t
month. '
• Days off when shift changes? ‘I guess I ' v e h a d o n e o r t w o d a y s o f f o n t h e l a s t f o u r
times the shift changed. '
• What has been wrong? ' I ' v e b e e n f e e l i n g r e a l l y j u m p y a n d o n e d g e . I ' v e b e e n
finding it hard to concentrate and just don't have any confidence. '
• When did this start? ' S i x m o n t h s a g o . ' — ' O n e d a y I h a d t o g o t o a f a t a l m o t o r
vehicle accident where an adult and two children were killed. The very next
day I was called to an armed hold-up and both my work colleague and I were
shot at by the offender. I was OK, but my work colleague received serious
injuries and he has not returned to work. '
• When has the anxious feeling been worse? ' W h e n I t h i n k a b o u t t h o s e e x p e r i e n c e s ,
or when I have to deal with another situation where people might get hurt.
It's also worse when I'm going back to work after some days off. '
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•
What is the anxiety like? Volunteer any two of the following features if asked a general question:
~ Feel terrified something awful will happen.
~ Racing heart (palpitations), breathing faster, and perspiring a lot.
~ Nightmares of both incidents — most nights.
~ Can't watch television or read magazines with pictures or articles of car accidents or Police Officers
being shot at.
•
What will happen in the future? 'It is only a matter of time before I'm injured or killed in the line of duty. '
•
Alcohol? Only answer direct questions 'Over the last six months my alcohol intake has increased from 1-2
glasses of wine per week to 6-7 glasses of wine each day on most days. '
•
What does alcohol do for you? 'It relaxes me and lowers the anxiety. It's the only thing that helps me
"unwind" after work and enables me to get to sleep. '
•
Does your use of alcohol bother you? 'I am worried that I have to have a drink to control the anxiety. '
•
Suicidal thoughts? 'No. ' If pressed further, add 'I have sometimes thought that life is not worth living. '
•
Any plans to commit suicide or past attempts to harm yourself? 'No. Never. I don't want to end my life. '
•
What about your gun? 'I have not handed this in nor have I been asked to do so. '
Examiner's questions
Towards the end of six minutes, the examiner will ask the candidate to describe three conditions which
should be included in the differential diagnosis. Appropriate responses are:
1. Anxiety disorder: post-traumatic stress disorder, panic disorder or generalised anxiety disorder.
2. Depressive disorder: adjustment disorder, major depressive disorder.
3. Alcohol dependence/abuse, or just problem drinking.
Next questions for the examiner to ask should be:
•
'What is a safe level of alcohol consumption for this patient?' Low risk = maximum of 20 grams per day (two
standard drinks) and two alcohol-free days per week (NHMRC Levels for Women).
•
'What are the short term risks associated with the patient's current level of alcohol use?’ You should expect
at least four of the following:
~ hangover effects — headaches, anorexia, tremor:
~ gastritis;
~ impulsive acts — including suicide attempts;
~ impaired decision-making:
~ accidents, including with firearms;
~ worsening of mood/depression;
~ potentiation of anxiety or post-traumatic stress disorder symptoms; or ~ social or occupational problems.
NOTE: If the candidate has not identified alcohol dependence/abuse as a problem, these questions should
NOT be asked. Instead ask 'Are there any other possible diagnoses?’
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KEY ISSUES
• Ability to take a focused history to define the potential cause of the current problem.
• Knowledge of the causes of the problem
• Knowledge of the short-term effects of alcohol excess, and the NHMRC recommendations of alcohol abuse.
CRITICAL ERRORS
• Failure to identify the excess alcohol consumption.
• Failure to ask about suicide.
COMMENTARY
This case concerns a patient with a work experience that has exposed her to severe stress, leading to an alcohol
abuse problem to help relieve a post-traumatic stress syndrome with anxiety. The patient is also at risk of comorbid
depression and suicide. She has a responsible job and failure to help her may also result in her colleagues or other
members of the community being at risk.
Candidates must both take an adequate history of alcohol consumption, and also explore the factors that have led to
the problem, namely the fatal car accident and the shooting of her work colleague the next day. They should ask about
the key features of post-traumatic stress, assess subjective mood and risk of suicide and. particularly in this case, her
access to firearms. Identifying the alcohol problem alone is insufficient for a pass. Candidates should be familiar with
at least four of the short-term risks or consequences of excess alcohol use and the NHMRC recommendations
concerning alcohol consumption. If they are not aware of at least four, a pass mark is unlikely to be given.
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Condition 086
Lifestyle stress in a 45-year-old man
AIMS OF STATION
To assess the candidate's ability to recognise and to communicate to the patient, common behavioural,
physiological, psychological and emotional concomitants of lifestyle stress, and to formulate and implement an
appropriate immediate and preventive management plan,
EXAMINER INSTRUCTIONS
The candidate needs to have sufficient skills in evaluation of cardiovascular disease to recognise this is not
ischaemic heart disease, and advise the patient accordingly. If candidates attempt to seek further history,
examination or investigation of cardiovascular disease, the examiner is to inform them (once) they are to proceed on
the basis of a normal examination. No further prompts. The candidate who pursues a physical cause to the exclusion
of the psychological matters should be marked down.
The examiner will have instructed the patient as follows:
You have been recommended to see a general practitioner to review your health after an insurance assessment. You
have been told that cholesterol, blood sugar, and resting ECG are normal, but on two occasions in the last month
when tested by the insurance doctor, the BP reading was high (160/80 mmHg) but eventually settled to normal levels.
On those days, you had come from particularly difficult meetings.
You have never thought about having serious physical illness, and believe people who complain of stress 'just aren't
motivated enough or don't work out their goals properly'. You enjoy being challenged by work and sports, and people
coming to see you for advice. You never take a day off work, even with a bad cold or jetlagged from a trip, and avoid
taking tablets, even a Panadol® if you have a headache at the end of the day.
The only health problem you have noticed is more frequent headaches towards the end of the day. which you put
down to eyestrain.
You have never felt depressed, or at any time recognised yourself as being anxious, and you would still enjoy all your
usual activities if there was time to do them.
You feel rather shocked by what you have been told and by the way you have felt over the past couple of weeks. You
have planned to retire at 55. You work 12-15 hour days. Since you were promoted 18 months ago, you have been
taking work home on weekends more frequently and there is a lot more pressure. You sometimes feel like escaping,
but think of it only being a few more years and anyway you feel happier at work than at home these days. It is just too
noisy with three teenage children, and you get irritated with your eldest son who dropped out of university last year,
and 'just sits around playing music with his mates'. You did not go on the family holiday this year for the same reason,
blaming work. Your spouse is usually very understanding, but got mad with you about that and things have been
tense the last few months. You have been more irritable at home, and your spouse complains you criticise the
children too much.
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You normally get on with a few hours sleep, often thinking through work problems once you are in
bed. You never feel tired, but the last year or so you 'catch up with naps' on weekends. The last
couple of weeks, you have slept badly, and feel tired in the morning There is little time for sex, but
you are sure it is not your lack of interest that is the problem.
You used to exercise regularly at the gym and with weekly tennis but have not done so in the last
few years because you are just too busy at work, and running around with the children's activities
on weekends. Now, you walk up the stairs when you have time.
You have gained a few kg over the past few years, but do not consider yourself overweight, or
unfit. You have always eaten a balanced diet, except when on overseas trips and at business
lunches.
You stopped smoking 15 years ago when your father, who was a very heavy smoker and ate
badly, died at 65 of a heart attack, but started again smoking 3-5 cigarettes a day in the past 12
months because it helps keep you going through the day. You have never worried about suffering
your father's fate, because you have looked after yourself so well. You consider yourself a
moderate social drinker. You notice you are drinking more these days.
You feel uncomfortable in an unfamiliar environment, and somewhat embarrassed about the
problem. Answer any questions from the candidate in a straightforward manner. Seek
reassurance about the risk of heart attack, but do not labour the point; and readily accept further
investigations, if offered.
Expect to be provided with an effective solution and definite results, the sooner the better, but
acknowledge the stress levels and sources when identified, and seek advice regarding change.
You are more accepting of a straightforward solution (for example, regular recreation, exercise,
and sleep pattern).
Questions to ask unless already covered:
• Opening question: 7s this stress, or some kind of a breakdown?'
• 'Could it be the beginning of heart trouble, or cause a heart attack?'
• 'If my heart is okay, why did I have those pains in my chest?'
• 'What would help the most?'
• 'What do you suggest I do?'
• 'How long will this all take to make a difference?'
• 'What happens if I need these tablets all the time to sleep? Are they addictive?'
• 'What else can I do to sleep?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should:
• Inform the patient about common symptoms of stress, both psychological and physiological.
• Explain the mechanism of physiological symptoms — headaches resulting from muscle
tension, sympathetic arousal causing blood pressure rise and initial sleep disruption.
• Reassure about nature of stabbing chest pain.
• Identify for the patient the sources of stress (overwork, absence of leisure and exercise) and
the compensatory measures which increase physical and emotional burden (alcohol and
smoking, reduced sleep).
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•
Educate about the negative role of stress in cardiovascular disease and mental health.
•
Assist the patient in identifying realistic changes for healthier work/personal balance (e.g.
increased recreation through regular exercise, holidays, and sleep pattern).
Initial management plan
•
Appropriate advice regarding lifestyle change, including discussion with spouse
•
Avoidance of intensive or invasive management.
KEY ISSUES
•
Patient counselling — explanation of diagnosis and patient education and initial management
plan.
•
Provision of an adeguate explanation about stress, its origins and its physical, behavioural
and psychological seguelae and complications, acute and chronic.
•
Reassurance about blood pressure and chest pain.
CRITICAL ERROR - none defined
COMMENTARY
This patient has obsessional personality characteristics of perfectionism, mental and
interpersonal control, propensity to overwork, and inflexibility (not personality disorder, on
available information). As a coping style, it has brought occupational and personal success, but
in the context of promotion and increasingly complex life, especially family demands, it is now
being overused; healthy compensatory mechanisms such as pursuit of fitness and competitive
sports have been discarded, and dysfunctional habits substituted. The degree of dysfunction is
sufficient to produce somatic and behavioural symptoms — increased headache, chest pain,
labile hypertension, increased intolerance and isolation. The patient is stressed and does not
have a psychiatric or physical illness, but intervention is now needed to modify those behaviours
which increase risk of cardiovascular disease and psychiatric illness, as well as relationship
breakdown. Recognition of the personality style enables realistic intervention — brief,
behaviourally or physically mediated, with extension to include spouse for interpersonal/family
issues.
Management
The essential management is to provide this patient with appropriately focused brief intervention
to modify behaviours and lifestyle, after engagement through adequate reassurance regarding
physical illness, followed by education of the physiological mechanisms and identification of
stressors. Use of hypnotherapy for sleep disturbance (short-term) is acceptable but other
measures are preferable, such as a regular sleep pattern, and progressive muscle relaxation.
Modification of lifestyle — restrain working hours, alcohol and cigarette consumption. Resume
exercise, increase leisure activities, including family pursuits — these are the interventions most
able to be implemented.
Include the spouse in supporting lifestyle modifications and enable discussion of interpersonal
and family issues.
Followup and ongoing monitoring of blood pressure and cardiovascular health is indicated.
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Communication skills
• Ability to take this opportunity to engage a reasonably informed, currently anxious, but usually pragmatic and busy
person in appropriate lifestyle change.
• Ability to combine the tasks of identifying stressors, with providing psychoeducation, through using direct questions
around the main activities of daily living and habits, and empathie listening.
• Attitude to alcohol and cigarette use should be nonjudgmental and proportionate to use.
• Consideration to inclusion of spouse in further discussion.
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Condition 087
Binge drinking in a 25-year-old man
AIMS OF STATION
To assess the candidate's ability to recognise the specific risks of the patient's drinking pattern
and to counsel him accordingly.
EXAMINER INSTRUCTIONS
This is problem drinking of a binge drinking type with consequential exposure to risk —in this
instance, to personal physical injury, neglect of parental responsibilities and potential harm to
his daughter. The binge drinking pattern risks impaired judgement and injury to self and others.
Other potential problems, some of which he has manifested in the past, are of illness, financial,
work, relationship, social, psychological and legal complications. Brief interventions such as this
consultation provide a vital opportunity to initiate change in critical patterns of dysfunctional
behaviour.
The examiner will have instructed the patient as follows:
Opening statement
•
(You are embarrassed and feel tense but attempt to make a joke of it) ‘I deserve this knock
and the team lost! I think its put some sense into my head, but I'll listen to your lecture just in
case!'
•
You have no recollection of your fall, or how much you had to drink.
•
Your mates said you were 'playing up'.
•
Respond to further questions about the amount you drink, or any other attempt to estimate it
(e.g. by cost), defensively — 'not any more than my mates at the club — don't do anybody
any harm.'
In response to specific questioning:
•
You drink because it helps you unwind, and makes you more sociable; you need a break by
the end of the week with work and taking care of your daughter.
•
Admit to being stressed by the demands of being a single parent and not being able to call on
your family for help because they hold you responsible for your former partner leaving. Now
you no longer have a babysitter because the next door neighbour who has filled that role now
refuses to do so because of the events last week. She had to go home and left your daughter
asleep, alone.
•
You regard yourself as a responsible and caring parent and had intended to be home. If
specifically asked, you admit this has happened before but rationalise your lapses by saying
' The girl is such a good sleeper, she never wakes and would never know.'
•
You do not feel anxious or depressed.
•
You do not have any symptoms of panic or phobia of any kind.
•
You have never had any medical complaints, apart from minor injury like today.
•
You do have 'blackouts' (episodes of amnesia) quite often.
•
You do not have any fits, faints, withdrawal symptoms (sweats, tremor and palpitations).
•
You have had no period of abstinence longer than two weeks.
•
You have not noted any change in tolerance.
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• You do not drink in the morning.
• You have had one drink driving charge with no loss of licence several years ago. No other forensic history.
Questions which may be asked with appropriate responses
• 'Are you saying I'm an alcoholic?' The candidate should indicate there are ranges of consequential problems
to excessive drinking, and binge type drinking is associated with increased risk-taking and acute harm
events.
• 'Look at my father — he's always been a drinker and he's okay' There are various responses, including
simply accepting this statement without comment, to a reminder that his father's drinking was associated
with violence and family dysfunction, which the patient would want to avoid for his daughter.
• 'Howcan I relax if I don't have a few drinks with my mates?'The candidate could respond with an undertaking
to discuss this further, or the option of controlled drinking (less feasible with a binge drinking pattern), or
some introduction of relaxation techniques.
Further instructions:
You know this doctor quite well, and generally feel comfortable here. You are embarrassed about your drinking
problem being addressed directly and you are initially tense and defensive, especially about any risk or harm to
your daughter or doubt about your parenting capacity. However, unless the doctor is unduly critical, you are
prepared to listen to the advice and respond in a positive way to changing your drinking habits.
EXPECTATIONS OF CANDIDATE PERFORMANCE
• Recognise that alcohol overuse — binge pattern — is the primary problem.
• Discuss the problem and actual consequences.
• Seek out whether there are any aggravating as yet undisclosed issues or current
stressors.
• Counsel the patient about the risks to his daughter and his relationship with and care of
her.
• Advise reduction or cessation of alcohol use — discuss.
• Demonstrate knowledge of hazardous/harmful drinking levels (NHMRC guidelines for men, safe up to six
standard drinks per day. no more than three days a week).
• Be able to communicate concern in a nonjudgmental and nonthreatening way so as to maintain rapport and
ensure engagement in ongoing review and case management.
The candidate is expected to diplomatically but firmly advise that the patient has a habit of binge drinking on
weekends, and that change is necessary, for his own wellbeing and his daughter's. The candidate should
approach this by discussing this incident and injury and asking about any current problems or stresses, and
encouraging the patient to talk about his views about his drinking and other potential problems.
KEY ISSUES
• Discussion about binge drinking and consequential harm.
• Highlight risk to daughter — discuss potential referral to child protective services or equivalent.
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CRITICAL ERROR
• Not addressing the issue of his daughter's wellbeing, protection and care management in any way.
COMMENTARY
Alcohol abuse and dependency are linked with genetic and developmental predisposition, developmental,
environment, personality traits and other psychiatric illness, especially mood and personality disorders, Sociocultural
factors are also significant. The evaluation of all of these elements is important in the individual case, especially
identification of concurrent psychiatric illness which requires treatment in its own right, and of interpersonal and
sociocultural factors which trigger or maintain the behaviour.
Hazardous drinking of excessive quantities of alcohol intermittently is a subtype of alcohol abuse, which is less likely
to be associated with addictive/withdrawal symptoms than a daily drinking pattern, and more likely to be associated
with injury and other social and interpersonal sequelae of impaired judgement and poor impulse control.
The recognition of hazardous drinking depends less on an estimation of the quantity consumed than defining a
pattern of drinking, often rapidly, to severe intoxication and consequential risk-taking. The symptom of a 'blackout', a
brief period of amnesia without loss of consciousness during a drinking episode, is associated with the rapid
consumption/absorption of alcohol and is a useful indicator of this pattern. Incidents of accidental injury to self or
others, disinhibition and sexual or aggressive acts, and neglect of self or others are other frequent reasons for
intervention. Episodic neglect of financial, occupational and social responsibility is common, such as regularly
missing work after weekends.
Effectively intervening in such a problem requires identification of the reason for the adverse consequences, sensitive
but frank communication about them and the underlying problem and appropriate offers of assistance, including
education, assessment of other psychiatric, medical, social, legal and interpersonal problems, motivation for change
and ongoing review.
In this case, there is a specific need to appropriately address the risk to the patients daughter which must include his
responsibility for parental care and protection, and the responsibility of the doctor to monitor and ensure her
wellbeing. including consideration of referral to child protective services.
In addition to counselling this young man about his hazardous drinking, the doctor may have a statutory obligation to
inform an authority such as the Department of Families, Community Services and Indigenous Affairs of his daughter's
situation. She is potentially at risk of abuse by neglect. Rather than being punitive or restrictive, the Department's
caseworkers should be able to advise him about local child-care and parent support services, as well as possible
child-minding options. Consider checking whether notification was made at the time of his presentation to the
Emergency Department.
Most communities will have single parent support groups and possibly men-only support groups which may be of
interest to him. A good general practitioner will either have relevant pamphlets on hand or be able to print the
information off line.
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Performance Guidelines
In addition to practical support, this man would benefit from understanding simple problem-solving in relation to his
daughter's ongoing child-care. For example, through her school he could advertise for part-time child support or
pressure the partners of his team mates to care for his daughter during the game and its aftermath.
His drinking pattern may jeopardise his ability to drive and hence his livelihood if he should lose his driver's license or
have a serious accident. Consider at what point should a clinician notify the local license-issuing authority about
CONDITION 087. FIGURE 1.
Alcohol content of standard drinks*
'Many thanks to Drug and Alcohol Services South Australia for this poster
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hazardous drinking.
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Performance Guidelines
Condition 088
Nausea, headache and feeling 'jittery' in a 30-year-old bank clerk
AIMS OF STATION
To assess the candidate's ability to recognise that the history strongly suggests a mild serotonin syndrome.
The candidate should ask for findings consistent with the serotonin syndrome, namely: sweating, tremor,
elevated blood pressure, increased pulse rate, increased muscle tone and hyper-reflexia. If the candidate has
not started to ask for these findings six minutes into the examination, the examiner should advise to proceed
with the tasks required, namely advising the patient of the diagnosis and management of both the immediate
problem and her depressive illness.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows
You are a 30-year-old bank clerk. You suffer from recurrent depression. Your medication has recently been
changed (see below). You have come back to the Emergency Department of a nearby general hospital
because of severe nausea, headache and the jitters.
Your opening statement to the doctor should be: ‘I feel awful doctor — I'm nauseated, I've got a
headache and a feeling of the jitters. It all started yesterday'.
Without prompting — go on and tell the doctor: 'Three weeks ago my local doctor started me on
Prozac® (fluoxetine) 20 mg daily for a relapse of the depression I get. It didn't seem to be
helping much'.
Two days ago you felt some back pain and attended the hospital Emergency Department. You saw a doctor
and mental health nurse and were told it was due to muscle strain'. They were more concerned with your
depression and prescribed Zoloft® (sertraline) 100 mg daily. You told them about being on Prozac® which
you then stopped taking because you knew that both drugs were antidepressants.
In answer to further questions which may be asked:
•
You feel anxious and 'aroused'. You are still sleeping poorly and waking about 4-5am. You think your
appetite was improving before the nausea started.
•
You have never had suicidal ideas but you remain pessimistic about the future and find it hard to
concentrate at work.
•
Your back pain has resolved.
•
You have had no other symptoms and your last period was two weeks ago.
You are wondering if the medication is the reason you feel so unwell. When the candidate explains that this is
the case, you are relieved. You are angry that the hospital doctors did not warn you of this, but on the other
hand you think there may well have been some confusion over what was said to whom as they all seemed
very busy and distracted and you felt a bit sorry for them and wanted not to bother them too much. You are
prepared to follow the doctor's advice about further treatment, but do not want to have another reaction like
this. You could say something like 'Could this happen again?'
The candidate is not expected to conduct a physical examination, but will ask for appropriate examination
findings from the examiner.
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Performance Guidelines
Near the end of the exam, if the candidate has not told you to stop the treatment with Zoloft®, you
should ask ' S h o u l d I c o n t i n u e w i t h t h e c u r r e n t d o s e o f Z o l o f t ® ? '
Examiner will provide details of physical examination on request as follows:
Pulse rate
90/min, regular.
Temperature
36.8 °C.
Blood pressure 130/80 mmHg
She has a tremor, her palms feel sweaty, and tone and reflexes in limbs are brisk and mildly
hyperactive.
EXPECTATIONS OF CANDIDATE PERFORMANCE
• Serotonin syndrome should be diagnosed.
• The appropriate advice regarding management is to stop Zoloft® (sertraline) and wait until the
symptoms resolve, in about 24 hours. As Prozac® (fluoxetine) has a long half life the candidate
should recommend waiting at least another week before reintroducing sertraline, at a lower
dose, for example, 25-30 mg. A reasonable alternative is to reintroduce fluoxetine, which has
not yet had an adequate therapeutic trial in this patient. The candidate should continue to treat
the depression and should arrange followup with the Emergency Department or the patient's
general practitioner the next day, and advise the patient to contact the after-hours service
immediately if symptoms worsen. Support will need to be provided for the patient during the
'washout' period as she is still depressed.
KEY ISSUES
• Ability to diagnose the serotonin syndrome due to side effects of a Selective Serotonin
Reuptake Inhibitor (SSRI) drug.
CRITICAL ERROR
• Failure to recognise the need to stop the Zoloft® (sertraline) medication.
COMMENTARY
This scenario is a timely reminder about aspects of psychopharmacology. Side effects are
common with most psychotropics because they may be prescribed too enthusiastically and in
dosages that are inappropriately high, especially in management of ' d e p r e s s i o n ' which is a
complex multifactorial complaint in our modern society. Not all patients with ' d e p r e s s i o n ' or
depressive symptoms need antidepressants, but like antibiotics they are often prescribed reflexly
by doctors under time pressure as a ’quick fix – it can’t do any harm’ panacea for a patient in
distress or in tears. Often it is the doctor's helplessness that is being treated by the prescription
because there is never enough time to establish why this patient is depressed on this occasion.
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Another common error is to start with too high a dose if the patient is 'really, really distressed {more must be better and
will work faster'). Antidepressants and antipsychotics take 3 4 weeks to work. If the patient's symptoms improve within
that time there may be other factors which explain the improvement, such as reduction in anxiety or insomnia or the
benefits of a sensitive interview with the discussion of issues and problems, or relief that the problem has been
identified and that something is being done.
Often it is not symptoms per se that cause patients or relatives to seek treatment. Patients present to doctors when
they are worried or anxious about symptoms or behaviours, or someone else is, who influences the patient to attend
the consultation. Anxiety intensifies ALL symptoms including 'depression' and is accompanied by typically
exaggerated and catastrophic cognitions about the conseguences and outcome of whatever is causing their distress.
‘Is it fatal/terminal? Will I go mad/drop dead etc?'
An effective initial consultation with a patient who is 'depressed which attempts a biological-psychologicalsociocultural approach and allows sufficient time for the patient to be listened to, to be understood and to be taken
seriously, will in itself relieve a major part of the intensity of the symptoms. This will only enhance the effectiveness of
whatever is subseguently recommended or prescribed.
Many people with 'depression' have mood fluctuations on a cyclical basis which are subthreshold or relatively mild.
These people are more likely to present at their peaks or troughs when they are symptomatic in response to a life
event or ongoing environmental stress. Their symptoms may be naturally or temporally transient. If these people (as
patients) are then prescribed psychotropics, including antidepressants, when symptomatic (instead of being managed
expectantly), and they improve after a few days, they and their clinician may mistakenly attribute their response to the
medication. This may commit them to a future psychological dependence on medication rather than learning to
tolerate temporary oscillations in mood and biological symptoms by using nonchemical coping strategies.
Some doctors and patients have become brainwashed by pharmaceutical companies into believing that any degree of
distress or suffering reguires a chemical solution that is quick and effective (but freguently expensive and
unnecessary). When a patient has been started on an antidepressant and is appropriately reviewed a week later and
reports no improvement, the inexperienced or unaware clinician may recommend doubling the dose and seeing the
patient a week later. At two weeks, when there is still no major improvement or cure, the dose will be increased or
doubled again. By the third week when the patient reports some improvement at last, this is wrongly attributed to the
increase in dosage and not the latent response to the initial dose.
SSRIs are potent drugs even in low dosage. Once the dosage increases then side effects and toxicity will increase
significantly. Most patients take such medications erratically or in fits and starts (i.e. if they are having ' a good day'
they will skip a dose: if it's a bad day', then they will double the dose). Some patients are extremely somatically
focused and will develop toxicity just by reading the package inserts about product information.
This patient feels aggrieved that she has been mismanaged and ill-served by the doctors who have unknowingly
contributed to her serotonin syndrome. Patients deserve better and clinicians must ensure that they are aware of both
the risks and benefits of the drugs they prescribe. As patients become better informed, they will not tolerate scenarios
like this one lightly. Neither will their legal advisers.
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The serotonin syndrome is caused by excess serotonin in the central nervous system, commonly because of
drug-drug interaction, in this case inadequate washout between a long half life agent (fluoxetine) and a high starting
dose of a second SSRI (sertraline). The syndrome usually presents with changes in mental state (confusion, irritability,
labile mood), restlessness, myoclonus, hyper-reflexia. fever, sweating, shivering and tremor and diarrhoea.
Hypertension, convulsions, and death have been reported. Treatment is to cease the medication and provide
symptomatic care (e.g. cooling blankets). Referral to an emergency specialist may be necessary in more severe
cases.
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Performance Guidelines
Condition 089
Collapse of a 30-year-old woman on the way to a court attendance
AIMS OF STATION
To assess the candidate's ability to conduct an examination of the lower limbs focusing on the
neurological system.
To make a diagnosis based on the neurological findings, observations of the patient's behaviour
and the history provided.
The examiner will have instructed the patient as follows:
•
The candidate is to do a neurological examination of your legs and ask you to stand and
walk.
•
Be polite, calm and cooperative. Exhibit a lack of concern for your condition.
•
Although your spouse is presently in court facing charges linked to his gambling debts, and
you cannot walk, behave in an unconcerned manner.
•
If asked directly, you say that you are a little worried for your spouse but have no concerns
for yourself. You have confidence in the hospital that they will be able to help and you will get
better.
•
Candidates are not required to ask any further history from you, and will be directed away
from that course by the examiner, should they do so.
•
During the examination, which involves tests of movement and coordination of your legs,
follow the candidate's instructions in a straightforward way while you are on the examination
couch — you are not required to simulate any dysfunction or discomfort.
•
When requested, you are able to lift your legs, and sit over the edge of the examination
couch, but you cannot stand, even with support, and firmly decline to walk.
•
You will not need to ask any specific questions to the candidate.
EXPECTATIONS OF CANDIDATE PERFORMANCE
When the candidate commences any sensory examination, or asks to do this, the examiner will
say that sensation does not need to be tested.
The candidate must test: passive and active movement, power, tone, reflexes, coordination and
should attempt to test gait. If the candidate attempts to test the plantar reflex, indicate this is
down-going.
•
Tone, coordination and reflexes will be normal.
•
Inconsistent findings should be noted by the candidate: normal active and passive movements in supine and sitting position, but patient unable to stand or walk, aided or unaided.
At six minutes, instruct the candidate to stop the examination, ask the candidate to summarise
the findings, and ask the following questions (appropriate answers in brackets):
•
'What would you expect to find on sensory examination, given your findings thus far?’
(Normal sensation)
•
'What is your likely diagnosis?' (Somatoform conversion disorder or similar term)
•
'What has led you to that conclusion?' (Physical findings inappropriate for organic illness)
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Performance Guidelines
If there is time, and the candidate has not commented on these features, the examiner could ask:
• What have you noticed about the patient's attitude and general behaviour and what
does that signify?'
• What is your understanding of the psychological reasons for this patient's
presentation at this time?'
The candidate should be able to:
• Perform a systematic motor examination of the lower limbs.
• Recognise the presence of incongruous affect, being bland disconcern ('belle indifference'),
and its significance for diagnosis.
• Formulate a likely diagnosis, being a physical problem developing in an individual under
stress: conversion disorder, somatoform disorder, abnormal illness behaviour, sick role
behaviour. Malingering is not an acceptable diagnosis because there is no personal gain.
Anxiety/stress or other such diagnosis by itself is not an acceptable diagnosis.
• Demonstrate familiarity with typically associated findings such as normal sensory examination
findings.
• Utilise a nonjudgmental approach, in the face of abnormal illness behaviour.
• Hypothesise that the 'belle indifference' and physical disability are defences against an
overwhelming emotion such as anxiety, anger or shame.
KEY ISSUES
•
Ability to conduct an appropriate focused neurological examination of the lower limbs and
identify a somatoform conversion disorder with abnormal illness (sick role) behaviour.
CRITICAL ERROR
• Failure to conduct a thorough neurological examination as instructed
COMMENTARY
This station assesses the ability of the candidate to recognise abnormal illness behaviour, to
correctly identify conversion disorder and also conduct an examination of the lower limbs. It is an
integrated station in that it is assessing both clinical skills in neurological examination and
recognition of a psychiatric somatoform disorder. It is thus unacceptable for the candidate to do a
cursory or incomplete neurological examination and equally, it is unacceptable for the candidate
to conclude the problem is 'stress-related', 'an anxiety disorder' or other such ill-defined
diagnosis. Use of terms that are in psychiatric classification schemes, other than the most recent
versions of the International Classification of Diseases — ICD10 or American Psychiatric
Association DSM-IV, such as hysterical conversion, abnormal illness behaviour and sick
role behaviour are acceptable. Stronger candidates may present a more sophisticated
diagnosis with formulation, thus correctly linking the conversion disorder to the unresolved
emotional conflicts around the impending fraud charges and the candidate's extreme shame and
anxiety in regard to this.
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The common feature of somatoform disorders is the presence of one or several symptoms or physical signs that
suggest an organic or physical illness but which are not explained by any medical condition, or side effects of any
medication or substance, or by another psychiatric disorder (e.g. schizophrenia or panic disorder). The symptoms
must cause significant distress, impairment or predicaments in the patients social and occupational functioning.
These disorders are common and typically first present in general medical or neurological settings. Presentations
vary from mild to severe and may be symptom-focused (hypochondriasis) or sign-focused (conversion disorder).
This patient has a conversion disorder. Her symptoms are confined to the voluntary central nervous system. The
acute disruption in her ability to walk was not associated with any known infection, trauma or physical injury and does
not conform to any known neurological damage pattern. Psychological factors associated with the drama and turmoil
of her husband's court appearance are highly relevant. Whilst multiple sclerosis, myasthenia gravis and idiopathic
periodic paralysis could be considered, they are improbable.
The psychological pathogenesis of a conversion symptom is that the individuals somatic symptoms represent a
symbolic resolution of an unconscious conflict, thus reducing otherwise overwhelming affects (anger/rage, anxiety,
depression, psychosis) and hence keeping the conflict out of conscious awareness ('primary gain'), but at a price.
The external benefits of the symptom/illness behaviour may include avoidance or exemption from anxiety-provoking
or threatening life experiences (e.g. a court appearance, an exam, a wedding, a job interview), an escape from
responsibility, or financial compensation ('secondary gain'). Unlike malingering or the deliberate feigning or faking of
symptoms of illness, which is done consciously and with intent, in conversion disorder the motivation is unconscious
and unintentional.
Typically the neurological findings are bizarre and atypical and do not conform to any known neurological disease,
but may reflect the individual's beliefs about how neurological disease may present. Recent functional magnetic
resonance imaging and positron emission tomography studies of lower limb psychogenic paralysis, show activation
of inhibitory centres in the orbitofrontal and cingulate gyrus areas of the brain with associated nonactivation of the
primary motor cortex, when patients were actively trying to move paralysed limbs. Psychogenic paralysis is worse
when patients consciously try to move a paralysed limb and are attending to the task, but improves when their
attention is distracted.
Previous followup studies with conversion disorders suggested that 30% may subsequently develop organic central
nervous system disease. With more thorough examination and modern sophisticated investigative technologies
missed organic disease may occur in less than 10% nowadays. 'La belle indifference has no diagnostic validity and is
nota criterion for diagnosis, nor is there any association with histrionic (or hysterical) personality traits, or repressed
sexual conflict in the genesis of most instances of conversion disorder.
Diagnosis depends on a careful history and linking a significant life event or interpersonal stress temporally to the
onset of the symptoms. Previous episodes of conversion disorder, alexithymia (lack of psychological mindedness).
increasing age, lower social class, a family history of physical illness and hence role models and a fear of
stigmatisation if psychological disorder is acknowledged, may all predispose to a conversion disorder
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Performance Guidelines
Many conversion disorders resolve spontaneously over a short period of time, especially if the onset was acute, with
no specific treatment other than explanation and targetted suggestion (after a thorough history, examination and
appropriate investigative workup). Other patients will need active rehabilitation, either as inpatients or as an outpatient,
with physiotherapy as the mainstay of treatment. Patients with chronic or multiple sensorimotor disturbances may
need treatment in specialised multidisciplinary units or psychiatric units. Patients should be told that their symptoms
are real and genuine and that their neurological deficits result from loss of conscious control over the affected function
due to a neurochemical disturbance. An expectation of full and complete recovery is provided in conjunction with
multimodal therapy, which may include cognitive behavioural treatments antidepressants and physiotherapy. Nontoxic
technologies such as ultrasound and transcranial or direct muscle magnetic stimulation may produce dramatic 'cure' of
paralysis.
An essential part of the treatment is a therapeutic alliance and rapport that allows the patient to recover with dignity
and no loss of face. The underlying affects may then emerge and become more florid and obvious, as the weakness or
other physical symptoms improve. These patients have exguisite somatic sensitivity and may develop side effects just
from reading the manufacturer's package inserts from any medication that is prescribed. Adjunctive psychotropics,
usually an SSRI antidepressant and/or an atypical antipsychotic, should usually be prescribed in iow fractional
dosages initially and increased very gradually to the normal therapeutic range. Up to 80% of patients make a complete
or substantially complete recovery from an individual episode, but 50% may relapse within 5 years.
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3 Clinical Management
(M)
3-A: Management Objectives: Therapeutics,
Prevention, & Public Health
Alan T Rose, Michael R Kidd, and Ronald McCoy
'Disease has social as well as physical, chemical and biologic causes.'
H Sigehst (1891-1957)
The term management can be used broadly to describe what the doctor does once the history
and physical examination have been completed. At that stage, a firm diagnosis may not have
been reached so that the next step in management may be to proceed with investigations or
referral. Some of the illustrative management cases in this book begin with a statement of the
diagnosis which is provided to the candidate. Others provide sufficient information for the
candidate to formulate diagnostic and management plans. In others the information provided
directs the candidate to undertake investigations to facilitate diagnosis, or the patient may be
returning for a second consultation with results of investigations now to hand.
Once the cause of the clinical presentation has been fully identified and treatment is about to
begin, the emphasis is now on the formulation of a management plan by the candidate, which
may include patient education and reassurance, advice and counselling, prescribing medication,
recommending a procedure, onward referral, arranging hospital admission, preventive care, and
followup. Separation of diagnostic and management phases allows parts of what would be
regarded as a long case' in normal clinical practice to be completed within the time allowed.
Management will often involve others beside the patient: a parent, spouse/partner, carer, other
family members or others, such as employers. The ethical bounds of confidentiality must always
be kept in mind. In complex cases, the clinician may be confronted with numerous conditions to
deal with some of which may be self-limiting, some insoluble, and others with a low priority. Thus,
one may have to use techniques of 'selective attention' and 'selective neglect' whereby a
conscious decision is made to focus on some problems, but not on others, putting aside some for
exploring at a later consultation.
OBJECTIVES OF THE MANAGEMENT PHASE OF THE CONSULTATION ARE TO:
• treat appropriately the patient and presenting condition;
• educate the patient about the condition;
• involve patients as far as possible in the management of their own conditions and ailments;
• achieve compliance in therapy;
• emphasise preventive opportunities; and
• provide appropriate support and reassurance.
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3-A
Management Objectives: Therapeutics,
Prevention, and Public Health
THE MANAGEMENT PROCESS
The following guidelines provide a sequence of steps for the management process. Not all are appropriate to every
case, and there will be different emphases according to the nature of the clinical problem.
The doctor should:
•
Tell the patient the diagnosis.
~ The medical term as well as the common or lay name should be given (e.g. Herpes zoster/shingles). An offer to
write the medical term down should be made. The use of medical abbreviations should be avoided (e.g. AMI).
•
Reassure the patient if the condition is minor, or advise the patient of appropriate serious concerns in a
nonthreatening and supportive way.
~ An anxious patient may not absorb detailed information adequately before being given time to consider the
implications of an important or serious diagnosis
•
Establish the patient's knowledge, understanding and attitude regarding the condition. ~ Patients are usually
reticent to admit ignorance of a condition and need encouragement to make inquiries (because of concern about
wasting the doctor's time).
•
Educate the patient about the condition.
~ Correct any incorrect beliefs.
~ Supplement existing knowledge to a level appropriate to the needs of the patient and the doctor.
~ The use of a diagram, model, or the patient's X-rays, ultrasounds or scans, will often facilitate effective
communication.
•
Answer the patient's questions. These may reveal misunderstandings which require further explanation. The
doctor should exhibit tolerance to repetition of questions, and be prepared to repeat or complete the provision of
information at a subsequent consultation.
•
Propose therapy within an appropriate timeframe.
~ Immediate, including when no action is required. Hospital admission may be the most important action to be
taken.
~ Longterm, if the illness is chronic or recurrent.
•
~ Preventive, which may be specific and may require lifestyle change.
Refer as required to a medical specialist or allied health professional. The standard of written referrals is often
inadequate. Referrals can be given to the patients to carry or sent separately. Enclosing copies of relevant
investigations and other medical reports is advisable. When considering the degree of urgency of the referral it
should be remembered that few patients feel they have minor problems in which long delays are acceptable.
Candidates in the AMC clinical examination need to recognise that referral to a specialist is not sufficient action,
unless the candidate indicates why the referral is necessary, and what action the specialist is likely to take.
•
Supplement and reinforce the information already given during discussion by providing written instructions, or by
supplying leaflets and brochures.
•
Counsel the patient or relative as required (see also Section 1-A).
•
Arrange followup — this may include an offer to see another member of the patients family, with the patient's
consent. Patients should leave the consultation with a clear understanding of whether the doctor wishes to review
this episode of illness, by what means and when.
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3-A
Management Objectives: Therapeutics,
Prevention, and Public Health
If investigations have been ordered, it is important for the doctor to review these, and to inform the patient of the
results, at a subsequent consultation, or by telephone or letter. Unexpected adverse results should be conveyed by
further interview, rather than by telephone. Overlooking to inform a patient of serious adverse results can have
medicolegal complications, even when the patient has been instructed to ring to check for results and failed to do so.
THERAPEUTICS
Therapeutics is the selection and use of pharmaceutical agents in the
treatment and prevention of ill health and in the maintenance of an
individual's health status.
Australians are fortunate to have a Pharmaceutical Benefits Scheme
which provides federal government subsidies to patients for prescribed
approved medicines (outside of public hospitals) by registered medical
practitioners who hold a preserver's number issued by the federal
health department. Costs to patients are further reduced by
concessions to certain income and age groups and ex-service
personnel — 'safety net' levels also apply to individual's/family's annual
expenditure on prescribed medicines.
Candidates for the AMC examinations are advised to be familiar with
the 'Schedule of Pharmaceutical Benefits' handbook updated three
times a year by the Australian government and issued free to registered
doctors, dentists and pharmacists. It contains a list of all subsidised
pharmaceuticals classified by disease categories, similarities of
actions, generic and trade names, form, prescription quantities and
their cost to the government.
The use of pharmaceuticals in
therapy usually begins once a
positive diagnosis has been
made. Exceptions are where relief
of severe pain is necessary
before the diagnosis has been
established or proven (renal
colic, biliary colic), when a
therapeutic trial using medication
can confirm a strongly suspected
diagnosis (gout, polymyalgia
rheumatica), or when medication
is given before a diagnosis has
been confirmed because early
treatment is necessary to avoid
serious, even life-threatening
consequences (temporal arteritis,
meningococcal septicaemia).
Some items require government approval before prescribing because of their high cost or risk of adverse reactions.
All these considerations have an effect on what pharmaceutical item is selected by the doctor for the treatment of a
particular condition.
Candidates are also referred to a series of publications entitled 'Therapeutic Guidelines', each covering a different
body system. They contain regularly updated advice from dedicated consensus groups on the current therapy for most
diseases, and are invaluable aids.
Australians also self-medicate with 'over-the-counter' items available from pharmacies and health food or natural
lifestyle outlets. Knowledge by the doctor of the use of these substances by patients can assist in understanding the
patient's attitude to sickness and health, awareness of possible drug interactions and the possibility of noncompliance.
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3-A
Management Objectives: Therapeutics,
Prevention, and Public Health
Patient perception of the effectiveness of medications (e.g. the use of antibiotics for viral
infections), varies markedly. Patients often attribute their recovery to medications rather than to
spontaneous resolution. Also important in considering drug therapy, is the need to treat more
than one condition in the same patient (e.g. a diabetic patient who is hypertensive and has
hyperlipidaemia). Polypharmacy is common in older age groups where several chronic
conditions are being treated simultaneously, or when a patient on longterm medication develops
an acute illness which demands additional medication. Patients may be confused when
medications are added, existing regimens are altered or dosages changed. Patients may also
be uncertain which of their medications relates to which of their ailments and be mistaken about
the timing or frequency regimens of their medication. These shortcomings need to be
understood by the doctor who must instruct the patient carefully. This may include writing the
instructions down. The situation is compounded by patients attending multiple doctors. Patients
will not necessarily volunteer what medications they are on to a second doctor, even when
referred for specialist care. The creation of medication lists on a patient's computer-generated
medical record has not replaced personal communication and enquiry about medication from
the doctor to the patient.
Pharmacists have limited capacity to detect inappropriate prescribing because patients use
different pharmacies, and because it is unethical for a pharmacist to ask a patient what
diagnosis has been made by the doctor.
Iatrogenic illness has steadily increased because of polypharmacy, drug interactions, and
patient confusion over medication dosage, together with adverse reactions, allergies and
idiosyncrasies which may be associated with the use of any medication.
TAKING A 'DRUG' HISTORY
Diagnostic consultations often require a 'drug' history, as follows:
•
•
•
‘Do you take now or in the past any prescription or over-the-counter medicines?'
'What for, and were they helpful or did you have any side-effects?'
'Do you have any allergies to medications?'
If a history of allergy is given, establish details and severity to determine risk of anaphylaxis, for
example to penicillin.
Always consider whether reactions, side effects or drug interactions may be contributing to
symptoms (for example, asthma, claudication or cardiac failure from Beta receptor blocking
agents; or cough from ACE inhibitors). Of particular importance are the effects of some
antibiotics on the efficacy of oral contraception, and drugs which accentuate or decrease
anticoagulant actions of warfarin. The proprietary publication MI MS, updated six times annually
and circulated to medical practitioners is a very useful guide to such effects, as are databases
on office personal computers.
Assessment of knowledge of therapeutics frequently takes place in management consultations
The use of pharmaceuticals in therapy usually begins once a positive diagnosis has been made.
Exceptions are where relief of severe pain is necessary before the diagnosis has been
established or proven (renal colic, biliary colic), when a therapeutic trial using medication can
confirm a strongly suspected diagnosis (gout, polymyalgia rheumatica), or when medication is
given before a diagnosis has been confirmed because early treatment is necessary to avoid
serious, even life-threatening consequences (temporal arteritis, meningococcal septicaemia).
486
3-A
Management Objectives: Therapeutics,
Prevention, and Public Health
The first step is for the doctor to select the correct therapeutic agents and name them by generic or proprietary name
and then comply with any government restrictions on use decide on dose, form, route and time of administration and
ensure that a sufficient supply (which may include repeats) is ordered. These decisions are either written or processed
onto personalised numbered prescription forms supplied by the government. These are the instructions which the
patient takes to a pharmacy to obtain the medicine. As emphasised above it is the doctor's responsibility to be aware of
significant side effects (unwanted symptoms from the drug, potential adverse reactions or drug interactions), and to
advise patients or relatives accordingly. It is at the doctor's discretion as to how much of such information should be
discussed with individual patients, but pharmacists are required to offer this information to patients, sometimes in
printed form.
A major objective of the doctor in therapeutics is to achieve patient compliance in the use of medication. The doctor's
function of prescribing medication is a complex process dependent not only on knowledge of available therapies for
specific diseases, but also on aspects of patient behaviour.
Often a wide range of therapeutic agents is applicable to a single condition (e.g. hypertension) where therapeutic
pharmacology is complex. Fifty different generic products (classified into 22 different categories) are listed on the PBS
for the treatment of hypertension. Most of these agents have several proprietary names. In the MIMS therapeutic
classification index, 21 different system and function groupings are listed, each with numerous (up to 14)
subcategories. The pharmaceutical companies employ many strategies for marketing their particular product to
doctors. More authoritative and referenced information about new drugs, indications, side effects, adverse reactions
and interactions is available in 'Australian Prescribe? (also online) circulated free to all doctors in Australia by the
Commonwealth Government.
Drug usage and dosage need modification in the following circumstances:
• Pregnancy — drugs potentially harmful to the fetus, particularly those with teratogenic potential, must be avoided.
• Children correct dosage is especially important in infants and small children and must be individualised and based
on weight.
• Elderly patients — drug tolerance is reduced increasing risks of overdosage (e.g. postural hypotension from
antihypertensives).
• Impaired organ function — especially liver failure or renal insufficiency.
• Previous portal-systemic shunting operations.
• The most commonly prescribed drugs cover a wide range, and include blood lipid-lowering agents, antiangina
agents, antihypertensives, ACE inhibitors, proton-pump inhibitors, nonsteroidal anti-inflammatory drugs (NSAIDs),
bronchodilator aerosols, diuretics, sedatives and anxiolytics, together with antibiotics.
487
3-A
Management Objectives: Therapeutics,
Prevention, and Public Health
PUBLIC HEALTH MANAGEMENT
Medical practitioners have a central role in public health and the prevention of disease
To be effective in this role, clinicians need to be
•
opportunistic in offering preventive care when patients present with other problems or concerns;
•
anticipatory in routinely assessing the preventive care needs of their patients;
•
proactive in targeting preventive care most intensively to high risk individuals; and
•
reaching all of their patients, especially those who are least likely to seek out assistance.
This involves looking beyond the individual consultation to the population of patients we serve. For example, to be
effective in immunisation or screening, clinicians must reach a large proportion of patients in their practice or
community.
To do this effectively can be difficult. Each preventive activity uses up some of the clinicians' available time to spend
with their patients, and therefore each activity must be based upon sound research evidence of what is effective.
Clinicians therefore need to understand which preventive activities are recommended as the costs may outweigh the
benefits when assessed by carefully designed research studies.
Candidates can access Guidelines on Preventive Activities from the Royal Australian College of General
Practitioners website (www.racgp.org.au). These guidelines only include activities of relevance where research has
shown a demonstrated benefit.
One of the challenges for clinicians is to ensure access to preventive care for all their patients. Some groups have
increased risk of diseases because of social or other factors.
The links between poor health and socioeconomic disadvantage include a relationship between mortality, social
class and how connected people are to their communities. The opportunities for health are affected by where people
live, their skills, their communities and lifestyles. Poorer health makes disadvantaged groups major users of general
practice and they are also the lowest users of preventive care services.
Social and economic factors influencing health include: level of education; occupational status; employment status;
income; place of residence and migration.
Candidates need also to understand the special public health and preventive issues facing Aboriginal peoples and
Torres Strait Islanders. The poor health of Aboriginal peoples and Torres Strait Islanders has many causes including
social and economic factors and the history of colonisation, and is also exacerbated by poor access to preventive
treatment and late intervention, with many cases of chronic disease only diagnosed when complications are already
present.
Notification of infectious diseases is an important public health responsibility for all clinicians. Candidates should
know which diseases are notifiable to public health authorities and how they are to be reported. Recent Australian
experience with SARS and related epidemics have emphasised the importance of knowing how to contact local
public health authorities. Candidates should be aware of how to contact relevant public health authorities in the event
of requiring assistance and advice in issues of public safety.
Alan T Rose, Michael R Kidd and Ronald McCoy
488
3-A
Management Objectives: Therapeutics,
Prevention, and Public Health
3-A Management Objectives, Therapeutics,
Prevention and Public Health
Candidate Information and Tasks
MCAT 090-100
90
Acute right-sided pain and haematuria in a 25-year-old man
91
Faecal soiling in a 5-year-old boy
92
Psoriasis in a 30-year-old man
93
Temporal arteritis in a 58-year-old woman
94
Acute idiopathic facial nerve palsy ('Bell Palsy') in a 40-year-old man
95
Dysuria and urinary frequency in a 40-year-old man
96
Eclampsia in a 22-year-old primigravida at 38 weeks of gestation
97
An abnormal glucose tolerance test (GTT) in a 34-year-old primigravida
98
Bed-wetting by a 5-year-old boy
99
Acute gout in a 48-year-old man
100
Request for repeat benzodiazepine prescription from a 25-year-old man
489
090
Candidate Information and Tasks
Condition 090
Acute right-sided pain and haematuria in a 25-year-old man
CANDIDATE INFORMATION AND TASKS
This 25-year-old man is being seen in the hospital Emergency Department with a first episode
of severe right-sided abdominal pain. The pain came on two hours earlier and was so severe
that the patient writhed in agony unable to relieve his symptoms. The pain started in the right
side of his back and radiated into his right groin and testicle.
He is now free of pain. He has had no pain like this previously and has been in good general
health.
Physical examination findings are normal, except that his urine is positive for blood on chemical
testing. There is no loin or other tenderness.
You have just finished examining him.
YOUR TASKS ARE TO:
\
•
Determine the most likely diagnosis and discuss initial investigations with the examiner.
•
Explain the diagnosis to the patient.
•
Outline your management plan, and any further investigations required, to the patient.
You will not need to take any additional history. There is no need for you to ask the examiner about any other
findings on clinical examination.
The Performance Guidelines for Condition 090 can be found on page 500
490
091
Candidate Information and Tasks
Condition 091
Faecal soiling in a 5-year-old boy
CANDIDATE INFORMATION AND TASKS
Mark, a five-year-old boy, is brought to see you in a general practice setting, because for the past
six weeks he has been soiling his pants, with increasing frequency, with foul-smelling semifluid
faeces. It is now happening almost every day and he is being teased at school.
His parent cannot tell you much about his bowel habits as he now attends to his own toilet needs
when he feels like it.
YOUR TASKS ARE TO:
• Take a further focused history from the parent.
• Ask the examiner for the appropriate findings on examination of the child which would be
relevant to your diagnosis.
• Explain your diagnosis to the parent and advise on management.
The Performance Guidelines for Condition 091 can be found on page 503
491
092
Candidate Information and Tasks
Condition 092
Psoriasis in a 30-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. You are seeing a 30-year-old man who works as a bank teller.
He has consulted you about a rash on the extensor surfaces of both elbows and both knees, over the sternal
and lower back areas, and in the scalp. It first appeared after a motor accident six months ago in which he
suffered a fractured femur. The patient remembers that his father, now deceased, used to be bothered by a
chronic rash.
It has been getting steadily worse over the last few months with some improvement following the use of cream
obtained from the local pharmacist (Egopsoryl TA®). This has helped the rash on his body but not on elbows,
knees and in the hair.
Examination has revealed the typical lesions of plaque type psoriasis. The plaques vary in size from a few
mm to several cm. They are raised, pink and covered with a silvery waxy scale. The nails are not affected. The
level of severity for this patient's psoriasis should be regarded as moderately severe.
You are about to discuss the disease and its management with the patient. The photograph shows details of
the skin lesions on the knees.
YOUR TASKS ARE TO:
•
Explain the nature of his condition to the patient
•
Advise the patient about management.
CONDITION 092. FIGURE 1.
The Performance Guidelines for Condition 092 can be found on page 507
492
Candidate
Information
093
and
Tasks
Condition 093
Temporal arteritis in a 58-year-old woman
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. This 58-year-old woman has consulted you about the
recent onset (two weeks) of right-sided headache gradually becoming more and more severe, and
which is now constant. Over the last few days, the patient has also had a tight feeling in the
muscles on the right hand side of the face when chewing.
On physical examination you noted tenderness and tortuosity over the right temporal artery as
illustrated. Its pulsation cannot be felt as well as that of the temporal artery on the left. There were
no other abnormal physical findings. The patient is normotensive.
093. FIGURE 1.
Side view of right temple
CONDITION
Based on this information you believe that the most likely cause of the patient's symptoms is
temporal arteritis ('cranial arteritis' or 'giant cell arteritis').
Brief Patient Profile
Married, works as an accountant. Nonsmoker. No significant past or family history except for
occasional migraine. Has been taking Panadol® (paracetamol 500 mg) for the headache.
YOUR TASKS ARE TO:
• Explain the diagnosis, and its implications, to the patient.
• Advise the patient about management — both immediate and longterm. This
could include any investigations you believe are necessary.
You do not need to take any further history. You have just concluded your physical examination
and are about to advise the patient of your diagnosis and management plans.
The Performance Guidelines for Condition 093 can be found on page 510
493
094
Candidate Information and Tasks
Condition 094
Acute idiopathic facial nerve palsy ('Bell Palsy') in a 40-year-old man
CANDIDATE INFORMATION AND TASKS
You are consulting in a general practice. You have just completed taking a history from and
examining a 40-year-old man who is very upset because of the sudden onset of paralysis of his
face.
He felt discomfort behind the left ear last night and on waking today found that the left side of his
face would not move. He arranged an urgent appointment with you. Examination confirms a
near complete left 7th cranial nerve facial palsy of lower motor neurone type. The
accompanying illustrations show the findings. There are no other abnormal neurological or
other signs including normal ear canals and tympanic membranes. The patients parotid salivary
glands show no abnormality. You have made a confident clinical diagnosis of acute idiopathic
facial nerve palsy (Bell Palsy')
YOUR TASKS ARE TO:
•
Explain the problem to the patient.
•
Advise the patient of the management you would advise.
•
Respond to any questions asked by the patient. The patient is very upset and concerned
that this may be a stroke, and wishes to know the cause, whether recovery will occur,
what treatment and tests he should have and how long it will take to recover.
Time should not be wasted taking further history or asking for any other physical findings. The
main issues to be addressed are patient counselling and management.
Smiling
Blowing out cheeks
CONDITION 094. FIGURES 1-4.
These illustrations show his facial appearance in repose and with smiling and movements.
The Performance Guidelines for Condition 094 can be found on page 512
494
095
Candidate Information and Tasks
Condition 095
Dysuria and urinary frequency in a 40-year-old man
CANDIDATE INFORMATION AND TASKS
This 40-year-old postman is married with two children and has consulted you today in a general
practice setting complaining of the gradual onset of dysuria and frequency of micturition over the
last three days. There has been no urethral discharge and no history of extramarital sexual
contact. On examination the patient is afebrile and you found no abnormality on examination,
including rectal examination of the prostate. A midstream urine specimen was collected and the
following office laboratory tests were done on the urine
• Dipstix — positive for protein, leucocytes and nitrites: negative for blood, glucose and ketones.
• Microscopy of uncentrifuged specimen — shows large numbers of leucocytes and bacilli.
The patient usually keeps in excellent health. He is aware that he is sensitive to penicillin but
otherwise his past history, family history, habits, and use of medication have no relevance to this
problem.
YOUR TASKS ARE TO:
• Advise the patient of your diagnosis.
• Advise the patient of your immediate management.
• Discuss the condition and answer any questions the patient may ask.
CONDITION 095. FIGURE 1.
Urine test strip
The Performance Guidelines for Condition 095 can be found on page 519
495
096-097
Candidate Information and Tasks
Condition 096
Eclampsia in a 22-year-old primigravida at 38 weeks gestation
CANDIDATE INFORMATION AND TASKS
This 22-year-old primigravida has been seeing you in a general practice clinic for her shared
antenatal care since early in her pregnancy. She is now at 38 weeks of gestation.
The pregnancy has been progressing perfectly normally until now. Whilst in the waiting room
along with her mother waiting to see you for her routine antenatal visit, she has had a g r a n d
m a l fit. She had brought a urine specimen with her to the appointment.
YOUR TASKS ARE TO:
•
Take any further relevant history you require from the mother of the patient, who is in the
waiting room.
•
Ask the examiner about the specific findings you would look for on general and obstetric
examination and any office test results which should be available to you.
•
Advise the mother of the patient, in lay terms, of the diagnosis and the subsequent
management you would advise for her daughter.
The Performance Guidelines for Condition 096 can be found on page 522
Condition 097
An abnormal glucose tolerance test (GTT) in a 34-year-old primigravida
CANDIDATE INFORMATION AND TASKS
This patient is a 34-year-old obese primigravida whom you are managing in a country general
practice. She has had a screening glucose tolerance test performed at 28 weeks of gestation.
This revealed a fasting blood glucose of 7.5 mmol/L and a two hour level of 9.5 mmol/L (Normal
levels — fasting < 5.5 mmol/L; two hour < 8.0 mmol/L).
Progress of her pregnancy has until now been normal. No other investigations have been done
apart from routine screening tests at the first antenatal visit which were all normal.
YOUR TASKS ARE TO:
•
Take any further relevant history you require. This should be limited to 1-2 minutes only.
•
Ask the examiner for the findings you would expect on general and obstetric examination.
•
Advise the patient of the diagnosis you have made.
•
Advise the patient of the management you would give in the remainder of the pregnancy.
The Performance Guidelines for Condition 097 can be found on page 525
496
098-099
Candidate Information and Tasks
Condition 098
Bed-wetting by a 5-year-old boy
CANDIDATE INFORMATION AND TASKS
Johnny, a five-year-old boy, is brought to see you in a general practice by his mother because of a
bed-wetting problem, which occurs nightly. He has
• been fully continent by day since he was three years old: and has
• previously been treated unsuccessfully with nightly amitriptyline (Tryptanol®).
The wetting exasperated his parents initially, but they now accept that it is involuntary and both
parents are keen to help him in any way possible.
YOUR TASKS ARE TO:
• Ask the mother for any further relevant history.
• Tell the examiner what relevant examination findings you would seek.
• Advise Johnny's mother how you will further assess and manage his condition.
The Performance Guidelines for Condition 098 can be found on page 528
Condition 099
Acute gout in a 48-year-old man
CANDIDATE INFORMATION AND TASKS
You are about to see a 48-year-old taxi driver who consulted you earlier today in a general
practice setting about continuous, severe, worsening, throbbing pain in the right first
metatarsophalangeal joint, which commenced two days ago. The joint was swollen and felt hot.
The overlying skin was red and shiny and the joint was exquisitely tender. There is a history of
previous attacks over the last two years. These have been diagnosed as gout. Each time
response to treatment was satisfactory. You took blood for serum urate estimation. The patient
has returned to find out the result (which was 0.74 mmol/L) and for treatment.
The normal serum urate range for males is 0.20-0.45 mmol/L. Urinalysis is normal.
The patient has always kept in good health apart from mild hypertension diagnosed two years ago
for which he takes hydrochlorothiazide. Over the past two days he has taken two or three aspirin
tablets for the pain.
YOUR TASKS ARE TO:
• Advise treatment of the acute attack.
• Discuss further management of his condition.
There is no need for you to take any additional history or perform any examination.
The Performance Guidelines for Condition 099 can be found on page 531
497
100
Candidate Information and Tasks
Condition 100
Request for repeat benzodiazepine prescription from a 25-year-old man
CANDIDATE INFORMATION AND TASKS
You are working in a general practice. You saw this patient for the first time one week ago and
provided a prescription for his usual sleeping tablet, the benzodiazepine oxazepam (Serepax®)
30 mg daily, 25 tablets. At that time, you were satisfied there were no comorbid problems such
as depression. The patient has returned today for another prescription. The patient's mental
state is unchanged.
YOUR TASKS ARE TO:
•
Evaluate the situation by taking a focused history.
•
Outline to the patient the nature of the problem you have identified and proposed
management.
•
Answer any questions the examiner asks you.
The Performance Guidelines for Condition 100 can be found on page 534
498
3-A
Management Objectives: Therapeutics,
Prevention, and Public Health
3-A Management Objectives, Therapeutics,
Prevention and Public Health
Performance Guidelines
MCAT 090-100
90
Acute right-sided pain and haematuria in a 25-year-old man
91
Faecal soiling in a 5-year-old boy
92
Psoriasis in a 30-year-old man
93
Temporal arteritis in a 58-year-old woman
94
Acute idiopathic facial nerve palsy ('Bell Palsy') in a 40-year-old man
95
Dysuria and urinary frequency in a 40-year-old man
96
Eclampsia in a 22-year-old primigravida at 38 weeks of gestation
97
An abnormal glucose tolerance test (GTT) in a 34-year-old primigravida
98
Bed-wetting by a 5-year-old boy
99
Acute gout in a 48-year-old man
100 Request for repeat benzodiazepine prescription from a 25-year-old man
499
090
Performance Guidelines
Condition 090
Acute right-sided pain and haematuria in a 25-year-old man
AIMS OF STATION
To assess the candidate's knowledge of the natural history of urinary calculi, and ability to
diagnose and manage a patient with a recent history of renal pain associated with a stone in the
ureter.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are aged 25 years and about two hours ago you developed severe right-sided back and
abdominal pain. The pain was gripping, severe and constant, with episodes of increased
severity each few minutes. The pain extended from the loin to your right testicle. You have been
writhing in agony with this pain, and never experienced anything like it before. Fortunately it
gradually eased and ceased after about 30 minutes. You have come to the Emergency
Department and have seen the doctor. The doctor has listened to your story and taken a full
physical examination and you have given him a sample of urine for analysis.
The pain has now settled. The doctor will explain to you the diagnosis and proposed
management. You have not heard about renal/ureteric colic or a stone passing from the kidney
down the ureter (the tube between the kidney and bladder), but have heard of kidney stones.
Questions to ask unless already covered and appropriate responses from doctor/candidate
(Answers in parentheses after the question):
•
‘Do / need to be admitted to hospital?' (Not at this stage)
•
'Will the pain come back?' (Possibly, if the stone is still in the ureter).
'Why did I get the stone?' — Ask this if the candidate suggests a stone is the cause of the
•
pain.
•
•
‘How will I know if I have passed the stone?' (You will strain your urine).
'What happens if the stone does not pass?' (An instrument may have to be inserted to
retrieve it).
•
'When do I see you again?' (Followup in a couple of days for investigation results).
The candidate should explain that you have a small stone that is passing down your ureter. It
may take one to two days to pass the stone. You will be given strong painkillers for the pain in
case it recurs. Most stones pass spontaneously. You are unlikely to have future problems, but
tests on your urine and blood will be done to check this.
The investigations required are likely to include:
•
Culture of the urine to exclude infection.
•
An ultrasound of the kidney may be performed looking for evidence of blockage of the ureter
caused by the stone.
•
Imaging by computed tomography (CT) to define the size and site of the stone.
•
Examination of the stone after you have passed it to determine the type of stone present.
•
Other blood tests and specialist referral may be required in followup.
500
090
Performance Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
• The candidate should indicate the pain is almost certainly due to renal colic, due to the fact a
small stone is being passed down the right ureter. No need for pethidine now as pain has gone.
If pain returns, give pethidine or Panadeine forte® or a nonsteroidal antiinflammatory drug
(NSAID).
• Give patient a brief description (draw diagram) of the anatomy of the kidneys, ureters, bladder
and urethra.
• Pass all urine into a container and strain (save any stones found for analysis).
• Imaging by computed tomography (CT) abdomen or plain X-ray, to identify the site of the stone
and use for subsequent assessment.
• Check urine for infection.
• Check serum uric acid, and serum calcium, urea and creatinine.
• Ultrasound to see if hydronephrosis is present is an acceptable and appropriate test, but
definitive imaging is by helical abdominal CT which will pick up very small stones.
• Advise high fluid intake. Refer to urologist if stone is not passed in 48 hours or pain recurs and
worsens. He may need an open operation, endoscopic removal, or ultrasound destruction if not
passed spontaneously (depends on size and site of stone).
• Followup to check progress.
KEY ISSUES
• Diagnosis of renal 'colic', probably due to a stone in right ureter.
• Explanation of the problem to the patient incorporating rapport with the patient and
communication skills.
• Providing an appropriate plan of management (including provision for further pain relief).
• Appropriate choice of investigations.
CRITICAL ERRORS
• Failure to make a diagnosis of renal (ureteric) colic.
• Failure to arrange appropriate investigations.
COMMENTARY
Renal and ureteric pain ('renal colic') frequently accompanies urinary calculi passing from kidney
to bladder via the ureter. Although the term, renal 'colic', is hallowed by long usage (as is biliary
'colic'), in neither instance is the pain usually of true 'colicky' type. Renal 'colic' is often an intense,
constant, agonising pain which makes the patient writhe and change position in an attempt to gain
relief, and does not wax and wane intermittently in a sine-wave pattern, rising through a
crescendo of intensity, and then diminishing over a similar period, with regular intervals of relief
from pain in between episodes of cramping pain. This is the pattern of true 'colic', as seen in
intestinal colic or uterine colic. Renal pain can vary in intensity but not with such cyclical regularity.
501
090
Performance Guidelines
Renal (and ureteric) pain is usually recognised by its character as described above, its site (which can be over a
wide area from posteriorly and laterally in the loin and flank, to the anterior abdomen, iliac fossa and
suprapubically). Pain can also radiate to the penis and testes, and to the upper thigh. Associated urinary symptoms
and the presence of blood in the urine (macroscopic or microscopic) help confirm the diagnosis.
Investigations of presumed renal colic due to stone are by diagnostic imaging. Most urinary calculi (80%) are
radio-opaque so plain abdominal X-ray may be diagnostic (as illustrated), however small stones may be missed
and differentiation from pelvic phleboliths impossible. The preferred investigation is a helical CT without
intravenous contrast (as illustrated), which will pick up any small stones and also identify urinary tract obstructions.
The majority of stones will pass spontaneously, so that treatment is usually expectant while providing pain relief for
recurrence of pain. Indications for intervention are large stones not likely to pass spontaneously, calculi associated
with uncontrolled infection, and persistence of pain without progress.
Radiolucent stones occur with hyperuricaemia and in some types of familial and metabolic calculi. It is prudent in
each patient with a urinary calculus to check for hypercalcaemiato pick up cases of primary hyperparathyroidism
presenting as renal calculi, a common mode of presentation of parathyroid adenoma. Full investigation for a
primary cause is mandatory in patients with a history of recurrent calculi.
CONDITION 090. FIGURE 1.
Plain X-ray showing opaque ureteric
calculi
502
CONDITION 090. FIGURE 2. Helical CT
showing obstructing right ureteric
calculus
091
Performance Guidelines
Condition 091
Faecal soiling in a 5-year-old boy
AIMS OF STATION
To assess the candidate's ability to diagnose and manage the problem of encopresis in a young
child secondary to constipation and faecal retention and to advise the concerned parent on
management.
EXAMINER INSTRUCTIONS
The examiner will have instructed the parent as follows:
The doctor is required to question you further, seeking a possible cause for your child's soiling.
Below are a series of answers to possible questions you may be asked'
• You are a very concerned parent about your child's constant soiling over the last six weeks.
• This is most unlike him as he was fully toilet trained by three.
• He is embarrassed by it, especially at school where the other children are calling him names.
Sometimes he hides his soiled underpants.
• This has been occurring for the last six weeks or so. He had an episode three months ago
when his bowel motions were hard and difficult to pass and caused him bleeding and pain
when he went to the toilet. However he seemed to get over that with some laxatives.
• There is no abdominal pain.
• He has had no vomiting.
• His appetite is good and he has a well balanced diet with lots of fruit and vegetables.
• He has not lost any weight.
• His urine is normal and he has no daytime or evening urinary incontinence.
• Except for the recent teasing, he enjoys school and he has lots of friends. His progress at
school is excellent and he enjoys the teaching he has had this year
• He has a good relationship with his younger sibling.
• His general health is excellent.
• He is the elder of two children. The home situation is very stable with both parents very active
in the raising of the children.
Once the doctor has finished questioning you, the examiner will provide examination findings on
your child, then the candidate is required to explain to you what is wrong and the principles of
management.
Questions to ask unless already covered:
• 'What can we do to treat this?'
• 'Surely he must smell It when he does It in his pants? Doesn't he know he is soiling
himself?’
503
091
Performance Guidelines
Examination findings — provide findings specifically requested
•
a shy boy;
•
normal height and weight on 50th centile;
•
abdomen is soft;
•
faecal masses are felt in the lower guadrants;
•
no other abnormality;
•
anus appears normal, with some faecal staining adjacent;
•
no anal fissure is apparent; and
•
on rectal examination the rectum is packed with firm faeces.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should explain that:
•
The most likely diagnosis is chronic constipation which from the history is most likely
secondary to the probable anal fissure he had three months previously. The constipation
leads to chronic dilatation of the rectum and lower colon.
•
Liguefaction of the faeces leads to soiling from overflow, but faecal masses remain.
•
The process often starts as an anal fissure, giving pain, and the child holds on fearing
defaecation will be painful.
•
Other aetiologies should be explored (e.g. emotional disturbances at home or school). None
is apparent, and so constipation with overflow is the most likely diagnosis.
Management
•
Empty large bowel by whatever means necessary. Try high dose oral laxative, enema or
suppositories.
•
Explain that if this is not successful he may need oral gastrointestinal lavage (Golytely®).
•
Next objective is to maintain regular bowel habit by use of laxatives and faecal softeners.
Therapy needs to continue for many months to allow resolution of the megacolon and to
ensure that the passage of motions is not painful.
•
Review to ensure constipation is not recurring.
•
See regularly to encourage and support parent and child in their efforts.
Interaction with patient
•
Explanation with appropriate language to parent to discuss the matters with the child.
Behavioural technigues such as a star chart to reward successful defaecation should be
encouraged.
•
Suggest regular toileting after meals for a set period of time; an egg timer is suitable for
timing.
KEY ISSUES
•
Explanation of diagnosis
•
Initial empting of rectum and colon.
•
Need for prolonged treatment and followup
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CRITICAL ERROR
• Suggesting that sigmoidoscopy or colonoscopy is required at this stage.
COMMENTARY
Constipation in young children is a very common problem presenting to primary care physicians and paediatricians
alike. The great majority of cases are nonorganic, that is they are related to an episode, in many cases associated with
the passage of a hard stool, which may make the child wary of passing a bowel motion subsequently. This can last for
a varying length of time. Constipation can be associated with a mucosal tear or anal fissure which distresses the child,
further compounding the problem. If one is able to recognise this pattern early and treat it with faecal softeners allowing
the fissure to heal, the episode may be short lived.
Major problems may develop, however, if the child remains fearful of going to the toilet because of anticipation of pain
and this compounds the situation leading to chronic constipation, toilet refusal and in many cases overflow encopresis.
This may be more difficult to treat.
Young children may also develop a fear of the toilet during toilet training if they are required to perch on a toilet seat
without support and this also may lead to deferral and subsequent constipation.
In many children, constipation is secondary to an emotional upset or trauma, whether this is at home, school or
elsewhere. Careful enquiry is necessary to seek information indicating that this may exist.
The aims of management are therefore to:
• Exclude any possible organic pathology.
• Explore any precipitating features.
• Provide adequate explanation of the processes involved for both parent and child with a plan of action to alleviate
the problem.
The hallmark of care of these children is a thorough and careful history which, in the majority of cases, will clarify the
probable aetiology. The history should include a thorough enquiry into the child's environment. While organic
conditions like Hirschsprung disease may need to be considered, Hirschsprung disease has usually presented by this
age and usually has a history of constipation from birth, often with a delay in the passage of meconium. However, if
there is doubt or suspicion of this condition, a paediatric surgical opinion should be sought to arrange bowel biopsies.
The history should include a thorough enquiry into aspects of the child's environment including diet, general health,
growth pattern, the family dynamics, progress at school, relationship with peers, and the like. From this information a
likely diagnosis may be evident.
Treatment is essentially careful reassurance and explanation to parent and child of the nature of the condition, if
organic pathology is not suspected. This should include a comprehensive explanation about how constipation has
developed, preferably with illustrative drawings. To achieve success is very time consuming in resistant cases, and the
doctor's role is to be supportive of the efforts of the parent and child, riding with them the inevitable ups and downs
towards success.
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The bowel however usually needs to be emptied of the retained faeces in the most painless and
noninvasive manner possible. This may need at times either simple faecal softeners or more
vigorous treatment with microenemas, or aperients from above. In severe cases, manual
disimpaction under general anaesthesia may be necessary. Once the bowel is empty the
faeces are kept soft with faecal softeners, which preferably do not stimulate the bowel, and a
retraining program is instigated. This may vary from child to child, particularly if toilet phobia is a
major issue. Many methods are available and are often successful.
The programmes used are described well in standard textbooks, and are available as Clinical
Guidelines from most major Children's Hospitals. Parent literature is freely available and for the
older children story books addressing the situation in terms they can understand are available.
It cannot be emphasised too much that the clinician's main role is the support of the child and
family over the period of time required to achieve success. Without this support and
encouragement, the programme is doomed to failure.
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Condition 092
Psoriasis in a 30-year-old man
AIMS OF STATION
To assess the candidate's knowledge of psoriasis and its management, and the ability to counsel
the patient about a chronic, cosmetically disturbing condition, which cannot be completely cured.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are suffering from psoriasis. You have a scaly skin rash for which you have just consulted
this doctor. The doctor has taken your history and examined you and will now discuss the
condition with you.
You are concerned that it may spread and wonder if a recent serious motor accident was the
cause. You find the ailment and the ointments distasteful because of the unpleasant smell and
staining of clothing and you are worried your wife may become infected. You are hoping to
receive reassurance that it can be cured. You wonder whether you should see a skin specialist.
Questions to ask unless already covered:
• 'What causes this?'
• 'Can it be cured?'
• 'Will it spread to other parts of my body?'
• 'I s it infectious?'
• 'Can it affect my health in other ways?'
• 'Could I pass it on to my children?'
• ‘Does it have anything to do with my accident?'
• 'I've heard that there is a chemist somewhere who can cure psoriasis?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
Approach to patient
• The candidate should show interest and concern, listen to and deal with the patient's concerns
and give clear instructions, answering questions directly.
Explanation of the diagnosis
• Description of which parts of the body can be affected (extensor surfaces of elbows and knees,
sternal and sacral areas, scalp and nails — but can involve other parts of the skin).
• Aetiology, nature, associations, expected course, availability of treatments, prognosis. Good
effect of sunlight if not overexposed. Psoriatic arthritis could be mentioned.
• Point out that physical or emotional stress can cause flare up. Diet has no effect. Exercise and
reduction in alcohol intake may be beneficial. Use of sunscreen applications during summer.
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Management — Immediate
•
The candidate should exhibit a general understanding of the principles and modalities of
treatment and that these are applied according to severity. Exact details, generic or trade
names, strengths (except for steroids) and doses are not expected although candidates
should indicate that these will be ascertained if required.
•
The candidate should include an offer to refer to a dermatologist. If this is the only
management advice given, the patient should ask for more information about treatment and
expect discussion of different types of local creams and lotions.
Management — Longterm
•
Monitoring of progress and repeats of medications are required. Review during flare-ups with
closer involvement if systemic therapy becomes necessary. Review if secondary infection is
suspected. Liaison with dermatologist.
Counselling
•
Ability to achieve patient understanding of the chronicity, variability and difficult therapeutic
nature of the condition. Despite this, reassurance that the condition can usually be brought
under control.
•
This requires the establishment of trust and confidence, backed up by clinical knowledge, a
willingness to listen to the patient's views about cause and treatments suggested by others,
and recognition of when referral to a dermatologist should be made using a patient-centred
as well as disease-centred approach.
KEY ISSUES
•
Approach to patient: must listen to and acknowledge patient's concerns and provide support
and encouragement.
•
Management: knowledge of principles of different local measures. Extent of treatment
proportional to severity.
•
Counselling and explanation of diagnosis: must acknowledge chronic nature of psoriasis and
that treatment can be demanding and will be prolonged. Must be honest and supportive.
CRITICAL ERROR
• Failure to explain appropriate principles of treatment.
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COMMENTARY
Aetiology of psoriasis is unknown but there is a familial predisposition. Onset is most commonly between 10 and 40
years but can occur at any age. There is increased epidermal cell proliferation, with vascular proliferation and
inflammation in the upper dermis. Psoriasis affects 2-4% of the population. It is not infective and waxes and wanes in
intensity. It can be drug-induced, e.g. lithium, Beta blockers, chloroquine and hydroxychloroquine; and it can be
precipitated by infections, trauma or emotional stress. The lesions can become secondarily infected. Diet is not a
factor. There is no complete cure but in most cases psoriasis can be reasonably controlled with therapy. Treatment
should be at an appropriate level for the type, site and severity of the condition. Psoriasis can be associated with a
specific type of arthritis, mainly affecting the hands.
In mild cases, emollients or a weak topical corticosteroid may suffice, but disfiguring psoriasis may warrant the use of
antimetabolites or immunosuppressants following the use of more potent topical corticosteroids. Complicated or
difficult cases need specialist care and open lines of communication between general practitioner, dermatologist, any
other medical attendants and the patient.
• For mild to moderate plaque psoriasis — use topical therapy — dithranol, tars, corticosteroids, keratolytics, and
emollients. Occlusive dressings increase their effect.
~ Dithranol — an antiproliferative agent — is very effective. Salicylic acid can be combined with tars and dithranol.
~ Tars — anti-inflammatory but can stain and smell which are disadvantages. Less when in combination (e.g. with
allantoin).
~ Topical corticosteroids are more potent preparations for thicker lesions, large quantities for widespread rash.
~ Keratolytics for lifting and softening thick scale such as sulphur and salicylic acid.
~ Emollients for scaling or irritation. Harsh soaps should be avoided.
~ Calcipotriol (a vitamin D derivative that regulates growth of keratinocytes).
• For psoriasis which is widespread, severe, or causing disfigurement or disability, systemic therapy is indicated such
as methotrexate or acitretin or cyclosporin. Phototherapy is also often used by dermatologists.
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Condition 093
Temporal arteritis in a 58-year-old woman
AIMS OF STATION
To assess the candidate's knowledge of the treatment of temporal arteritis and its most important possible sequel: visual
impairment.
EXAMINER INSTRUCTIONS
The examiner will have advised the patient that she should ask about side effects of steroids and whether some
alternative medication is preferable, as she doesn't like the idea of steroids. She should also ask about further tests such
as X-ray and whether the headache might just be a simple migraine.
Questions to ask unless already covered:
•
'Could it be a migraine?'
•
'Are there any (other) complications?'
•
'Are you sure that my eyesight will be all right?'
•
'Should I see an eye specialist?'
•
'Isn't "cortisone" dangerous?' (If 'cortisone' or 'steroids' are recommended)
•
'What are its side effects?'
•
'How long will the headache last once treatment lasts?'
•
'How long will I be on "cortisone"?'
•
'Can this trouble affect me in any other way?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
This can become an emotive situation for the patient after being informed of the nature of the condition and the
possibility of severe visual impairment.
The doctor should not withhold this information, which should be given with empathy and support. Politeness, respect
and consideration rather than an authoritarian approach should be demonstrated when discussing the threat of
blindness and obtaining compliance with the use of corticosteroids.
The doctor should listen carefully to the patient's queries and provide honest as well as accurate answers. Generating
trust and confidence and giving the correct level of reassurance are also expected.
Initial management plan
An erythrocyte sedimentation rate (ESR) or C-reactive protein (CRP) should be arranged immediately with request for a
same day report (this requires liaison with the patient who should contact the doctor later in the day).
The patient should be commenced on oral prednisolone in high dose at first (60-100 mg). A stronger nonopioid
analgesic than paracetamol should also be prescribed.
Referral to a surgeon with a view to temporal artery biopsy should be discussed and urgent referral to an eye specialist
should be advised.
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Patient Education
The aetiology and prognosis of temporal arteritis are obscure. It is a manifestation of giant cell arteritis.
Confirmation by ESR or CRP (usually markedly elevated) is essential, followed in most cases by biopsy of the
superficial temporal artery for confirmation because of the likely need for medium to longterm corticosteroid therapy.
Commencement of oral steroid therapy before completing investigations is indicated to reduce the risk of visual
impairment, especially in a case of this duration (two weeks).
This patient should be seen again within 48 hours by which time significant resolution of symptoms should have
occurred. Once symptoms are controlled and ESR levels fall, the prednisolone can be reduced to maintenance levels
(5-10 mg three times daily).
The patient should be monitored closely by continuing review of symptoms and serial ESR levels. Resolution may take
up to 2-3 years. Concomitant use of H2 receptor antagonists should be considered in patients with a history of
dyspepsia or peptic ulcer.
KEY ISSUES
• Skill in conveying unpleasant news to patient in an honest and supportive manner with guarded reassurance about
the outcome.
• ESR or CRP must be ordered with urgent early report requested.
• Must commence prednisolone therapy immediately.
• Patient counselling and education is required regarding possible biopsy, referral to eye specialist and longterm
nature of the condition.
CRITICAL ERRORS
• Failure to request ESR or CRP.
• Failure to commence prednisolone therapy.
COMMENTARY
Although this is not a common disorder, the high risk of preventable blindness and response to early treatment makes
it essential knowledge. A highly probable diagnosis is possible on clinical grounds alone. Involvement of the ophthalmic
artery or ciliary arteries may occur causing optic atrophy and blindness. Vision is impaired in about 50% of patients at
some stage. If blindness occurs it is usually irreversible.
Temporal arteritis may follow polymyalgia rheumatica in about 20% of cases. The condition is very responsive to
corticosteroids which should be prescribed in high doses initially.
Maintenance steroid therapy in lower dose over 2-3 years may be required, which raises the possibility of
steroid-induced complications of osteopenia, hypertension, diabetes and changed facies.
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Condition 094
Acute idiopathic facial nerve palsy ('Bell Palsy') in a 40-year-old man
AIMS OF STATION
To assess the candidate's knowledge of Bell Palsy, its prognosis and its management, and skills in counselling an
upset and anxious patient.
EXAMINER INSTRUCTIONS
The patient has the condition as illustrated. He is very concerned, but if informed and reassured appropriately, will
accept the diagnosis and management plans.
EXPECTATIONS OF CANDIDATE PERFORMANCE
You would expect the candidate to:
•
Acknowledge the patient's distress about his appearance and to provide support and guarded reassurance,
particularly reassurance that the patient has not had a stroke.
•
Explain the diagnosis and natural history of the condition. The cause is unknown but is consistent with
inflammatory compression of the facial nerve in the temporal bone (probably viral).
•
Expected course — about 70% of patients completely recover within two months. First signs of recovery appear
within two weeks. About 20-25% take up to six months for full recovery; and 5-10% do not recover by the end of
one year. An older patient age is associated with slower recovery.
Advise about immediate management:
~ Steroids are usually prescribed empirically: prednisolone 40-80 mg daily for three days then taper off and cease
over the next seven days. Antiviral drugs may also be given because of its presumed viral aetiology.
~ Wear patch over left eye at night.
~ May prescribe artificial tears.
~ Review within a few days for support and monitoring.
~ Investigations are not essential but CT head would be appropriate for reassurance in view of patient anxiety
about a stroke.
~ Referral to a neurologist should be offered for confirmation of diagnosis and possibly for nerve conduction
studies. Referral is also appropriate for confirmation of management, because of possibility of incomplete or
nonrecovery.
~ Arrange continuing followup to monitor progress, watch for symptoms of conjunctivitis and corneal injury.
~ Consider early referral to a physiotherapist as an aid to self-management strategies. There is no evidence that
exercises or nerve stimulation aid recovery, but they may support patient confidence in recovery.
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KEY ISSUES
• Approach to patient — acknowledging distress about his appearance, providing support and guarded
reassurance about recovery.
• Initial management plan — protection of eye and possible use of steroids and antiviral agents. Offer referral to
neurologist and physiotherapist.
• Patient counselling about prognosis and natural history, stressing that complete recovery is usual (although not
invariable).
CRITICAL ERRORS
• Telling patient that complete recovery always occurs.
• Very unsatisfactory counselling skills displaying insensitivity in dealing with an anxious patient.
COMMENTARY
The most common cause of unilateral facial nerve palsy without a clear history of local injury is the condition of
idiopathic acute facial nerve palsy ('Bell Palsy)
Bell Palsy is of unknown aetiology and affects all ages and both sexes. Patients present with an acute or subacute
onset over a few hours. Pain around the ear is followed by unilateral facial paralysis of lower motor neurone type, with
complete or partial paralysis of muscles supplied by the facial nerve. The clinical features are consistent with a lesion
due to inflammatory oedema and compression of the nerve within the bony canal of the petrous temporal bone.
Clinical features of the lesion, if complete and all muscles equally affected are as follows (see illustrative figures):
• Facial asymmetry is accompanied by loss of voluntary, emotional and associated movements.
• The affected side of the face is immobile, the eyebrow drops, the lines on the forehead and nasolabial fold are
smoothed out.
• The palpebral fissure is wider due to the unopposed action of levator palpebrae.
• Tears fail to enter the lacrimal puncta medially because they are no longer held against the conjunctivae and the
eye weeps.
• The direct corneal reflex is absent, but the patient appreciates the discomfort from testing and the indirect corneal
reflex is present (the other eye blinks). Corneal abrasion and ulceration are significant risks.
• Efforts to close the eyes cause the affected globe to roll up under the upper lid (Bell reflex).
• The a/a nasi does not flare or dilate with vigorous breathing.
• The lips stay in contact but cannot be pursed for whistling. When smiling, the angle of the mouth on the affected side
does not move; and in repose 'wry-mouth' can be identified.
• Hyperacusis in the affected ear can be troublesome when the patient is subjected to local noise.
• During mastication food accumulates in the cheek and dribbling of saliva can occur from between paralysed lips.
• The articulations of labial consonants (m, b, p) may be affected.
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•
Loss of taste sensation may be noted in the anterior tongue on the affected side.
•
The cosmetic and psychological effects of the disfigurement can be profound.
•
Patients with Bell Palsy are frequently concerned that they may have suffered a paralytic stroke.
Pathologic Anatomy
The facial nerve supplies muscles of facial expression from scalp to neck — from occipito-frontalis in the scalp to
platysma below, and including those muscles governing movement of eyebrows, eye closure, mouth, cheek and
nose.
The major motor root of the 7th nerve originates in the pons from the motor nucleus and fibres run in the pons in an
unusual curving course around the 6th nerve nucleus before leaving the anterior surface of the mid-pons to enter the
internal auditory canal with the 8th (vestibulocochlear) cranial nerve. The motor root is joined at the internal auditory
meatus by the 'sensory' root, which carries afferent taste fibres from the tongue and also efferent secretomotor fibres
to the lacrimal and salivary glands. Somatic sensation to the face is subserved by the 5th cranial nerve, not the 7th.
Within the petrous temporal bone the nerve runs laterally to the medial wall of the tympanic cavity before bending
backwards abruptly (the genu). The facial nerve then runs downwards in the facial canal on the inner wall of the
tympanic cavity, giving branches to the tiny stapedius muscle of the inner ear, and giving off the chorda tympani,
before emerging from the stylomastoid foramen at the base of the skull.
The geniculate ganglion is the relay station for the secretomotor fibres for tears and the site of the sensory root
ganglion of the taste fibres. From the geniculate ganglion run the secretomotor fibres to the lacrimal gland and
submandibular salivary gland. The autonomic sensory taste fibres are carried from the tongue with the lingual nerve
(carrying ordinary sensation) via chorda tympani through middle and inner ear, to the sensory facial nerve root. Facial
nerve lesions below the chorda tympani (e.g. in the parotid gland) will not affect taste.
The chorda tympani leaves the nerve a few millimetres above the point of exit from the stylomastoid foramen, and runs
between the layers of the tympanic membrane separating outer and middle ears, and then joins the lingual nerve to
the tongue, and supplies the anterior two-thirds of the tongue with taste sensation as illustrated.
The motor branches of the facial nerve break into a spray of branches and run through the parotid salivary gland
before emerging from its anterior border to supply the facial muscles via temporal, zygomatic, buccal, mandibular, and
cervical branches as illustrated.
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f.m,
s.f
s.g.
tn
s.s.n.
7* m.n.
rn T.
s.r
s
b
at
g.gi.a.m.
foramen magnum
stylomastoid foramen
submandibular ganglion
taste nucleus - nucleus of tractus solitarius
superior secretory nucleus
7th nerve motor nucleus
motor root
'sensory' root
stapedius
buccinator
chorda tympani
geniculate ganglion
internal auditory meatus
CONDITION
094.
FIGURE
5.
Anatomy of facial nerve
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Differential Diagnoses — other causes of facial nerve palsy
•
Patients with Bell Palsy are frequently concerned that they have had a stroke', or have a cerebral tumour.
•
Facial weakness due to 'stroke' is usually upper neurone in type and part of a hemi-paresis on the same side as
the facial paralysis. Movements of the upper muscles to forehead and eyes (which are bilaterally innervated from
the upper motor neurone) are spared, as may be emotional movements. However, an infarct in the pons may
produce a nuclear (lower motor neurone) lesion of the facial nerve.
•
In Bell Palsy the motor lesion is confined to the facial nerve alone and is lower motor neurone in type.
•
If hearing loss or other cranial nerve lesions are associated with facial nerve palsy the diagnosis is more likely to
be a cerebellopontine angle tumour (for example, auditory neurofibroma) or a vascular event from vertebrobasilar
insufficiency.
•
If vesicles within the external ear or on the palate accompany the 7th nerve palsy the condition is viral herpes
zoster infection affecting the geniculate ganglion, not Bell Palsy. This is the Ramsay Hunt syndrome, and
occasionally other cranial nerves are also affected. Such patients are often elderly. Pain may precede the facial
palsy and the associated herpetic eruption in the ear and sometimes on tongue or palate. Recovery of facial nerve
function is rare. Prompt treatment with aciclovir may improve prognosis and diminish post-herpetic neuralgia.
•
If the nerve is affected within the parotid gland, this is usually due to a parotid malignancy giving partial or total
lower motor palsy. Benign parotid tumours do not cause facial palsy.
•
Basal skull fractures of the petrous bone are another important cause of facial nerve palsy.
CONDITION 094. FIGURE 6.
Left-sided facial nerve palsy
Face in repose: note widening of palpebral fissure due to unopposed action of the levator of the upper lid, smoothing
of facial lines and failure of eversion of mucosa of patient's left lower lip ('wry-mouth') due to paralysis of depressor
anguli oris.
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CONDITION 094. FIGURE 7.
Left-sided facial nerve palsy
Attempted eye closure: note failure of left eye closure with rolling up of the eye under the upper eyelid, and
accentuation of the 'wry-mouth' triangular deformity.
CONDITION 094. FIGURE 8. Left-sided
facial nerve palsy
Obvious deformity when smiling: note immobile left eye and mouth musculature and absence of nasolabial fold.
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CONDITION 094. FIGURE 9.
Left-sided facial nerve palsy
Attempting to blow out cheeks: note failure of left buccinator muscle with flaccid paralysis of patient's left cheek.
The patient is unable to prevent air from escaping from the mouth when he tries to build up intraoral pressure.
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Condition 095
Dysuria and urinary frequency in a 40-year-old man
AIMS OF STATION
To assess the candidate's approach to a first time urinary tract infection in an adult male patient.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You consulted this doctor today because of the gradual onset of dysuria and frequency of micturition over the last three
days. The doctor has examined you (including rectal examination) and asked you to provide a urine sample which was
checked in the practice laboratory. You are about to receive the doctor's advice about the problem.
Questions to ask unless already covered:
• 'What did you find in my urine?'
• 'Can this infection be treated easily?'
• 'Where do these bacteria come from?'
• ‘Is this the same as my wife gets?'
• 'Tell me exactly what tests I should have done?'
• 'Why do I need these tests?'
• 'Do you think I have something seriously wrong?'
• 'How long will I need to take the medication?'
• 'Could it occur again?'
• 'What will the urologist do?' (Ask only if referral is advised)
You are not overly concerned about your condition because your wife has suffered from occasional urinary tract
infections over the years which have always responded well to treatment with antibiotics. She has had no other
investigations other than urine laboratory tests. You expect to recover quickly after receiving antibiotics.
If the doctor indicates that further special investigations are necessary followed by referral to a urologist, be surprised
and express some reluctance to undergo these procedures. If the doctor handles your reaction satisfactorily agree to
follow this advice.
EXPECTATIONS OF CANDIDATE PERFORMANCE
Approach to patient
• This may appear to be a straightforward clinical situation but it requires care to avoid alarming the patient
concerning the need for more investigations than just a urine culture
• Give a clear explanation of the nature of the condition.
• Obtain compliance in use of medication (clear instruction about frequency and duration)
• Emphasise importance of followup.
• Explain why further investigation is essential and obtain compliance for this.
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Tell the patient what Is wrong
A variety of terms may be used to describe a urinary tract infection but the candidate should explain that it is most
likely to be in the lower urinary tract (bladder, prostate or urethra) rather than in the kidneys, because of the absence
of fever and loin pain.
Immediate management
The candidate must advise that the midstream urine specimen collected today will be sent for culture and antibiotic
sensitivity assessment.
Choice of initial treatment — appropriate antibiotic — for example, trimethoprim 300 mg orally, once daily; or
cephalexin 500 mg orally, 12 hourly. Urinary alkalisation may be used, for example, Ural® (sodium citrotartrate) 8
hourly. Duration of therapy is 14 days. Amoxycillin is often given but is inappropriate in this patient because of the
penicillin sensitivity. Advise patient to drink extra fluids. The antibiotic therapy should be commenced today whilst
awaiting the culture results. Phone with results when through.
Early review if poor response to treatment. Followup of this episode by repeat microscopy and culture after
completion of antibiotic therapy.
Discussion of condition and advice about investigation
Significance of a urinary tract infection in males. Usually associated with underlying pathology according to age
group:
• Children — congenital abnormality especially vesicoureteric reflux.
•
Younger adults — foreign body in bladder, sexually transmitted infection, including homosexual activity.
•
Older adults
~ calculus formation in kidney, ureter, or bladder;
~ prostatitis;
~ bladder polyps or carcinoma;
~ benign prostatic hypertrophy;
~ carcinoma of prostate;
~ urethral stricture; or
~ genitourinary tuberculosis should not be forgotten.
•
The clinical picture suggests a lower urinary tract infection. The main conditions to be excluded are urinary
neoplasm and calculus and prostatic pathology.
KEY ISSUES
•
Approach to patient.
•
Initial management plan.
•
Choice of investigations.
•
Patient education and counselling.
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CRITICAL ERRORS
• Failure to arrange urine culture before commencing antibiotic therapy.
• Failure to advise the need for further investigations.
COMMENTARY
• Further investigation is essential to identify the underlying cause and to exclude malignancy.
• These would be undertaken in a staged manner.
• Urinary culture to define organism. Repeat culture after initial treatment.
• Ultrasound of kidneys, ureters, and bladder.
• Contrast enhanced CT of abdomen and pelvis.
• Prostatic specific antigen (PSA) level.
• Serum urea and electrolytes
• Referral to a urologist who may arrange:
~ cystoscopy,
~ voiding cystourethrogram.
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Condition 096
Eclampsia in a 22-year-old primigravida at 38 weeks gestation
AIMS OF STATION
To assess the candidate's ability to recognise that the grand mal fit is a sign of eclampsia, and the ability to manage
appropriately this particular pregnancy complication in an 'out-of-hospital' situation.
EXAMINER INSTRUCTIONS
The examiner will have instructed the mother of the patient as follows:
Your daughter has just had a fit in the waiting room. The fit occurred approximately 10 minutes ago and lasted three
minutes. She bit her tongue, and had funny movements of her limbs, and then went off to sleep.
The candidate will generally be expected to take an appropriate history from you as the mother in order to manage
the case. The list of responses below is likely to cover most of the questions you will be asked.
Your daughter has:
•
no past history of epilepsy, and has never had any treatment with antiepileptic drugs;
•
no hypertension, renal disease, or other medical problem in the past;
•
not mentioned any headaches or visual disturbances recently; and
•
noticed oedema of the legs for the last two weeks, but was otherwise well.
Questions to ask if not already covered:
•
'Why did she have a fit?'
•
'Will the fit damage my daughter or her baby?'
•
'Will she have any more fits?'
•
•
'What are you going to do with her now? Can I take her home?'
If the candidate suggests hospital transfer, but does not detail what will happen to the daughter following
admission to hospital, you should ask 'What treatment will they give my daughter in hospital?'
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Examination findings to be given to the candidate by the examiner on request
•
Drowsy, but rousable.
•
Generalised oedema.
•
BP:
•
Pulse:
80/min and regular.
•
Reflexes:
very active, clonus evident at the knees.
•
Abdominal examination: uterus enlarged to 38 cm (symphysis-fundal height), lax, and non tender. The
presentation is cephalic, fixed in the pelvic brim, with three fingerbreadths palpable above the pubic symphysis.
The fetal heart is audible and normal.
•
Central nervous system examination — apart from the conscious state and the active reflexes, this appears
normal. There are no unilateral localising signs.
180/110 mmHg.
Investigation results
None done except office urine testing of specimen brought with her showed proteinuria (++++). Failure to ask for
the results of urine testing would indicate inadequate care. ,
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should advise the mother along the following lines:
• The diagnosis is eclampsia, a condition which occurs late in pregnancy generally in women having their first baby.
Providing it is well controlled, no longterm harm usually occurs to either mother or baby, although it is potentially
very dangerous to both the mother and baby.
• She will need to be transferred and admitted to hospital immediately, and delivery arranged as soon as her blood
pressure and any further fitting are brought completely under control.
• There is no point prolonging the pregnancy in view of the gestation of 38 weeks.
• Prior to transfer to the hospital admission an anticonvulsant such as diazepam should be given intravenously in an
attempt to prevent further fitting (oral therapy is inappropriate and NOT acceptable).
• The likely care provided in hospital would be:
~ an intravenous drip to be inserted and magnesium sulphate commenced in appropriate dosage to try to prevent
any further fits;
~ the blood pressure should be lowered with intravenous hydralazine or diazoxide — oral agents are ineffective and
should not be used;
~ tests on patient should include: renal function tests, liver function tests, Hb and platelet count, and coagulation
profile;
~ the fetus should be checked by cardiotocography (CTG);
~ monitoring of the patient should include: pulse, blood pressure, temperature, urine output, and frequent urine
testing (predominantly for protein); and
~ the room should be prepared in case a further fit occurs with the facility to administer oxygen, to have a Guedel
airway/padded spoon available to prevent her from biting her tongue, to have the facility to place her in Sims
position, and to observe her in a slightly darkened environment.
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• The mode of delivery will depend on her condition, and the cervical findings. If the cervix is very favourable, she
should be induced and monitored closely in labour, probably with the use of an epidural anaesthetic for pain relief
and blood pressure control. CTG monitoring of the fetus in labour is mandatory. If the cervix is unfavourable,
consideration needs to be given as to whether induction is appropriate, after prostaglandin priming, or whether an
elective Caesarean section is more appropriate. Obviously if the CTG is abnormal, Caesarean section is likely to
be required.
KEY ISSUES
•
Knowledge of the causes of fitting in pregnancy.
•
Ability to manage a patient who has had an eclamptic fit in late pregnancy and is not in hospital.
CRITICAL ERRORS
•
Failure to diagnose eclampsia and recognise risk of this to mother and baby.
•
Failure to sedate, and failure to transfer her immediately to hospital.
•
Failure to outline the three principles of management in the hospital — sedation, lower blood pressure, and
delivery of baby.
COMMENTARY
In this case the most likely diagnosis is eclampsia occurring in pregnancy. A history of previous fits should be sought,
but it is unlikely that this is anything other than an eclamptic fit. It is important that the three basic principles of the
management of eclampsia are performed or arranged. These principles are: prevention of further fits; lowering of the
blood pressure; and arrangement for immediate delivery of the baby by the most appropriate route.
Common problems likely with candidate performance are:
•
When taking the history, not being focused enough to the actual problem, but asking for information such as
irrelevant past history, social history and so on. This just takes time to do, and reduces the time available for the
remaining tasks.
•
Not asking whether she had had any fits before.
•
Not asking for appropriate examination findings, such as hyperreflexia.
•
Not requesting whether there was any proteinuria present.
•
•
Failing to understand that any prolongation of the pregnancy is irrelevant as the gestation is already 38 weeks.
Administering oral instead of intravenous hypotensive drugs to reduce the blood pressure.
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Performance Guidelines
Condition 097
An abnormal glucose tolerance test (GTT) in a 34-year-old primigravida
AIMS OF STATION
To assess the candidate's ability to make the correct diagnosis of gestational diabetes, and to appropriately manage the
patient for the remainder of the pregnancy. The candidate should do this by taking a focused history, asking the
examiner for the examination findings, and then advising the patient appropriately
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows
The list of responses below is likely to cover most of the questions asked.
• No family history of diabetes.
• You have never been tested for diabetes previously.
• No previous operations or illnesses
• This is your first baby.
• You are now 28 weeks pregnant.
• Your ultrasound at 18 weeks was normal.
Questions to ask if not already covered:
• What do the blood sugar levels mean?'
• 'Do I have diabetes?'
• 'How bad is my condition?'
• ‘What treatment will I require?'
• ‘Will my baby be diabetic?'
Examination findings to be given to the candidate by the examiner on request
•
The blood pressure is 120/80 mmHg.
•
No proteinuria.
•
•
Uterus is enlarged to the size equivalent to a 28 week pregnancy (symphysis-fundal height = 28 cm).
Cephalic presentation, head still mobile above the pelvic brim.
•
Fetal heart rate is normal.
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Performance Guidelines
EXPECTATIONS OF CANDIDATE PERFORMANCE
It would be expected that the candidate would provide much of the following information.
•
The diagnosis is gestational diabetes
•
Consultation with a diabetic physician and consultant obstetrician is mandatory.
•
She should follow a special diet to keep the blood glucose during the day at less than 7 mmol/L. If this is not
possible, insulin therapy will probably be necessary.
•
Test the blood sugar 3-4 times per day, especially about two hours after a meal.
•
The major risks to the baby are:
~ Macrosomia (large baby size) — do ultrasound at 32-34 weeks and probably deliver
by Caesarean section if macrosomic.
~ Increased risk of fetal death in utero — therefore weekly CTGs should be performed until delivery, twice weekly
if on insulin, the fetus is macrosomic or polyhydramnios occurs. These should be started at 32-34 weeks
gestation.
~ Hyaline membrane disease if delivered prematurely — try to delay induction until after 37 weeks. Steroid
therapy would improve fetal lung maturity, but will make gestational diabetes worse.
•
Risks to the mother — increased risk of pre-eclampsia.
•
Deliver at term at the latest, unless obstetric complications indicate earlier delivery is indicated. Monitor the fetus
by continuous CTG in labour. Keep blood glucose levels stable in labour with intermittent insulin injections.
Deliver by elective Caesarean section if macrosomic (> 90th centile for weight), breech presentation, or evidence
of fetal distress.
•
The diabetes will almost certainly resolve following delivery. However gestational diabetes is likely in subsequent
pregnancies, and there is a 30% risk of her developing diabetes later in life. Glucose tolerance should therefore
be checked at least every 5 years for life. She must control any weight gain in the future.
KEY ISSUES
•
Ability to recognise that the blood sugar results are diagnostic of gestational diabetes.
•
Ability to appropriately assess the control of the diabetes during the remainder of the pregnancy, and to
appropriately manage the patient, in consultation with a physician and obstetrician.
•
Ability to recognise the need for insulin if the blood glucose levels are not reduced satisfactorily with diet alone.
•
Ability to recognise the increased risks to the fetus, and the need for close monitoring.
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Performance Guidelines
CRITICAL ERRORS
• Failure to diagnose gestational diabetes.
• Failure to advise diabetic diet and testing of blood sugar levels 3-4 times daily.
• Failure to arrange for consultation with a diabetic physician and obstetrician.
COMMENTARY
This case illustrates the need for the candidate to recognise the diagnosis of gestational diabetes based upon a two
hour glucose tolerance test. The most important aspects of the management of the case are to recognise the need for
assessment of the blood sugars three or four times a day; the need to consider insulin if the blood glucose levels do not
respond, and the need to include in the management of this patient a diabetic physician and an obstetrician.
Common problems likely with candidate performance are:
• When taking the history, not being focused enough to the actual problem, but asking for information such as
irrelevant past history, social history and so on. This just takes time to do, and reduces the time available for the
remaining tasks.
• Failing to recognise a need for special fetal monitoring because of the increased risks to the fetus.
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Performance Guidelines
Condition 098
Bed-wetting by a 5-year-old boy
AIMS OF STATION
To assess the candidate's ability to diagnose and handle the common problem of bed-wetting in a 5-year-old child.
EXAMINER INSTRUCTIONS
The examiner will have instructed the parent as follows:
You are the mother of Johnny who has a problem with bed-wetting nightly since the age of three years. You were
initially exasperated by the wetting but now have accepted that the wetting is involuntary. You have not punished
Johnny despite your exasperation.
His general health is excellent, and he has had no major illnesses. He appears to be growing normally and is on the
middle line of his graph for height and weight. Since the age of 3 years, he has always been dry during the day and
never had any incontinence. He has never had a urinary tract infection.
He is embarrassed and you and your spouse are very keen to help him control his wetting. His father wet the bed until
the age of nine years. The tablets that were tried two years ago made no difference to the wetting.
Johnny is going very well at school and enjoys his teacher. He has lots of good friends. You and his father are happily
married and have no major stresses in your lives. Johnny has a 4-year-old younger sister who has been dry day and
night since the age of two and a half.
Questions to ask if not already covered:
•
‘Is there something wrong with his kidneys or bladder?'
•
'Does he need any investigations?'
•
‘We have restricted his fluids after dinner at night and lift him onto the toilet when we go to bed. Should we
continue to do this?'
•
'What about when he is asked to sleepover at a friend's place — so far we haven't let him do this. Is there anything
we can do for that?'
•
'How does this alarm work if he has already passed urine and wet his bed before it goes off?'(If an alarm is
advised)
EXPECTATIONS OF CANDIDATE PERFORMANCE
This scenario describes a 5-year-old boy with persistent primary bed-wetting from three years of age. He is otherwise
well, has no daytime wetting or any other symptoms to suggest a pathological cause for his wetting.
His height and weight are on the 50th percentile. The boy himself is very keen to be dry, and his parents are keen to
help him achieve this. These are important points the candidate should appreciate. Amitriptyline (Tryptanol®) was
tried about two years previously to no avail. Johnny is doing well at school and has lots of good friends.
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Performance Guidelines
The parents are happily married and under no major stresses. His 4-year-old younger sister has been dry day and night
since the age ot 21/2 years. The candidate should enquire about family history; one parent was a bed-wetter until aged
nine years.
Before embarking on a plan of action, the candidate should proceed as follows:
• Check the boy's urine by dipstix (Multistix®) testing, and a urine microscopy and culture.
• Enquire about the child's growth percentiles, which are normal.
• Ensure his blood pressure is normal.
• Renal ultrasound may be suggested but is probably unnecessary unless there is a great deal of parental anxiety.
Having excluded any organic pathology and having ensured that there are no serious emotional reasons to account for
the symptom, the candidate should outline an ongoing plan of management. This should include:
• Empathy with the exasperating nature of the condition particularly with the excessive washing of bedclothes and
pyjamas, but enthusiasm for the interest the parents are showing in trying to help Johnny.
• Reassurance that there is almost certainly no organic pathology present.
• Advice that even though lifting and restriction of fluids have not been shown to be effective generally, if the parents
are keen to continue this they should feel free to do so as it occasionally does help some children.
• Outlining the plan of management including use of an enuresis alarm. Explain how the alarm works as a
conditioning response to release of urine.
• Explaining how to obtain the alarm (for example, through pharmacies [hiring], buying or through some Community
Health Centres or Children's hospitals)
• Discussing that the success rate is much higher if the child himself is motivated to become dry (as Johnny is),
• Discussing a recording star chart and reward system.
• Supporting and encouraging child and parent by regular frequent review to encourage the boy on even minor
successes.
• Explaining a plan of action for the use of arginine vasopressin (DDAPV®) by nasal spray when it is important to
remain dry and avoid any embarrassment for school camps and sleepovers. Explain the safety of this substance if
used only as directed.
• Advice that the success rate with amitriptyline (Tryptanol®) is low. It can be a dangerous drug in overdose and is
rarely used now.
• Advice that even with the alarm it may be some weeks before success is achieved and the alarm should be
persisted with for up to three months.
A review appointment should be made two to three weeks after the alarm has started, to review the progress.
KEY ISSUES
• Empathy, support, and encouragement to both child and parent.
• Enquiry about a family history of enuresis.
• Exclusion of emotional stress at home or school.
• Exclusion of organic pathology by the history and by arranging simple urine testing.
• Advice about plan of action should be logical and clear.
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Performance Guidelines
CRITICAL ERROR
• Suggesting a probable organic cause for the wetting and the need for invasive investigations.
COMMENTARY
This scenario describes a five-year-old boy with persistent primary bed-wetting from three years of age. He is
otherwise well, has no daytime wetting or any other symptoms to suggest a pathological cause for his wetting. The
candidate snould appreciate that the boy himself is very keen to be dry, and that his parents are willing to help him
achieve this
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099
Performance Guidelines
Condition 099
Acute gout in a 48-year-old man
AIMS OF STATION
To assess the candidate's ability to manage an acute attack of gout and give advice about its prevention.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are suffering from severe pain in your right foot which began two days ago. You saw the doctor earlier today who
diagnosed gout (which you have had before), and arranged for a confirmatory blood test. You have returned to find out
the result and receive treatment.
You are a 48-year-old taxi driver and usually keep in good health. You do not smoke but drink three or four stubbies of
beer, after work, daily. No serious past medical problems but you are taking tablets for mild blood pressure diagnosed
two years ago. You are overweight. You have no family or social problems.
You are anxious to get relief from the pain which is preventing you from driving your taxi. You are somewhat irritated
that you were asked to have a blood test, because this was not done during previous attacks which responded well to
treatment. You have little knowledge about the cause of gout and are unaware that recurrent attacks are to be expected
and can be prevented. You have not suspected that the blood pressure tablets could have something to do with gout,
and are annoyed that you were not warned about this.
Questions to be asked if not covered
• 'How long before I can resume work?'
• 'What causes gout?'
• 'Can it do any serious damage to my system?'
• 'What is the best treatment?'
• 'Should I have any other tests?'
• 'What about having a beer after work?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
• Approach to patient
It is essential to establish a satisfactory relationship with this patient because of the need for compliance regarding
his use of alcohol and control of his weight, and to defuse irritation about having to have a blood test for this attack
and finding out that the antihypertensive medication has been a precipitating factor.
• Initial management plan — immediate
~ Discontinue diuretic and aspirin.
~ Specific treatment:
- Nonsteroidal anti-inflammatory drug (NSAID) initially in high dose: e.g. indo-methacin 25 mg capsules —
50-75 mg immediately, 50 mg two hours later, 25 mg eight hourly for 48 hours, then 25 mg twice daily for one
week, would be appropriate. Other NSAID such as naproxen or ibuprofen are also effective.
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Performance Guidelines
- OR prednisolone 25 mg orally, daily in the morning, reducing to zero over 7 to 10 days.
-
OR colchicine 0.5 mg tablets 2-3 immediately, then 1-2 every 4-6 hours or until diarrhoea occurs.
Maximum dose 6 mg/24 hours. As pain reduces the dose of colchicine can be reduced to 0.5 mg twice
daily.
-
Note that allopurinol and probenecid are contraindicated for an acute attack.
~ Additional measures:
- Increase fluid intake.
- Elevate and rest foot for 24-48 hours.
- Paracetamol (Panadol®) can be used for additional pain relief if needed.
- Warn regarding possible side effects of medication: indigestion and elevated blood pressure from
indomethacin or prednisolone: diarrhoea from colchicine.
- Suggest an alternative drug to reduce blood pressure (e.g. angiotensin converting enzyme inhibitor [note
that all thiazides and Beta blockers may exacerbate gout]).
- May return to work as soon as pain is relieved — should be within 48 hours.
•
Initial Management — Preventive
~ Ensure adequate intake of water. Do not take diuretics or salicylates.
~ Reduce weight. Reduce intake of alcohol. Avoid foods rich in purine (offal, tinned fish, shell fish and game).
~ Approximately eight weeks after this attack has subsided may commence allopurinol 50-100 mg daily,
gradually increasing up to 300 mg daily (two strengths 100 and 300 mg tablets)
~ Check uric acid level after 4 weeks — aim to reduce below 0.4 mmol/L
~ Colchicine (0.5 mg b.d.) can be used in conjunction with allopurinol if gout recurs during initial therapy.
~ Further assessment of patient should include review of blood pressure, serum lipids, fasting blood sugar and
urea and electrolytes. Other renal function tests are not indicated at this stage. X-ray of the affected area is not
required.
•
Patient education and counselling
~ Gout is a metabolic disturbance with an inherited tendency in which there is decreased renal clearance of urate
causing hyperuricaemia with deposition of urate crystals in joints, soft tissue (tophi) and urinary tract (urate
stones). It is frequently associated with hypertension, dyslipidaemia, and Type 2 diabetes. Thiazide diuretics
also predispose to diabetes. Gout:
- Particularly occurs in the great toe following minor trauma.
- Can follow any surgical operation.
- Can be precipitated by alcohol excess, and diuretics which inhibit sodium reabsorption.
- Is aggravated by diet high in purines.
- Is prone to recurrence.
- Exhibits a prompt response of the acute attack to appropriate treatment (24-48 hours).
KEY ISSUES
•
Appropriate choice of drug therapy for initial management.
•
Appropriate patient education and counselling regarding prevention of further attacks.
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Performance Guidelines
CRITICAL ERROR
• Failure to advise change of antihypertensive medication (thiazide diuretic).
COMMENTARY
Gout (uric acid arthropathy) may present as acute arthritis or be associated with a chronic destructive arthropathy. Most
cases of primary gout are due to excessive synthesis of uric acid while one-third relate to reduced renal clearance of
urate. Acute gout commonly affects the great toe metatarsophalangeal joint, although other foot joints and the ankle are
frequent sites. It may affect any joint in the body or, unusually, it can present as a polyarticular arthritis mimicking other
systemic rheumatic conditions. The joint can be extremely painful, red and tender and the patient may be intolerant of
even a sheet touching the foot. If fluid can be obtained from an affected joint, it will contain needle-shaped crystals that
are negatively biréfringent on phase-contrast microscopy. Plasma urate concentration may not be elevated in the
course of an acute attack, so hyperuricaemia is not a necessary diagnostic criterion.
CONDITION 099. FIGURE 1.
Acute gout
CONDITION 099. FIGURE 2.
Chronic tophaceous gout
It is important to treat hyperuricaemia in order to avoid chronic gouty arthritis, tophaceous gout and renal complications
(calculi, chronic renal failure due to interstitial nephritis). Hyperuricaemia is commonly exacerbated by excess alcohol
intake and drugs. It is common in clinical practice to come across an elderly patient who has been on longterm diuretic
therapy with chronic tophaceous gout and renal impairment. This should be considered an iatrogenic disease.
Hyperuricaemia is an independent risk factor for cardiovascular disease. Therefore, an attack of gout provides an
opportunity for the prescriber to review the cardiovascular risk factors (for example, smoking, hyperlipidaemia,
hypertension, obesity), and to recommend appropriate management.
In this station, the candidate is confronted with a very common clinical problem, an eminently treatable condition and an
opportunity, through patient education, to institute a longterm management plan to reduce the frequency of attacks. It
also provides the practitioner with the opportunity to address significant lifestyle issues with the potential for improved
cardiovascular health.
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Performance Guidelines
Condition 100
Request for repeat benzodiazepine prescription from a 25-year-old man
AIMS OF STATION
To assess the candidate's ability to identify benzodiazepine dependency and counsel the patient accordingly.
EXAMINER INSTRUCTIONS
The station assesses the candidate's awareness that longterm benzodiazepine use is a problem (abuse), capacity to
recognise overuse in this case by simple calculation (dependency), and preparedness to intervene and address this
with the patient. It also assesses ability to evaluate the problem further by taking a focused history, communication
skills in engaging the patient and ability to make an appropriate management plan — including an awareness of
potential problems following sudden cessation.
A brief survey of mood is all that is required in this case. The history does not suggest any other psychiatric diagnosis
except substance dependency.
At five minutes, if candidates have not already done so, interrupt and ask them to give their conclusions and
make their recommendation to the patient.
At six minutes, ask candidates whether they would immediately stop the prescription and why.
You may not need to ask this question if the candidate has already addressed this issue.
The examiner will have instructed the patient as follows:
You are a 25-year-old, divorced salesman. You were first prescribed this anxiolytic four years ago when your
marriage broke down. At the same time, your business failed and you were having problems going for job interviews
because you had lost so much confidence. You eventually found the anxiolytic was very good at helping you get off to
sleep quickly, and you have continued to use the anxiolytic since. Your work, relationships and home life are generally
okay now, but you expect this is at least partly because you can get to sleep without fail and feel calm throughout the
day.
Opening statement:
'This is just a quick one for you, Doc. I just need a refill of my sleeping tablets, thanks, and then I will be on my way'.
If the doctor indicates in any way that you should not be taking the Serepax®, or that the doctor is going to stop or
substantially change the dose immediately, respond as follows:
‘I know I need to continue the Serepax® because on occasions I have taken only half a tablet for a few days, or
missed taking them for one to two days, and I ended up feeling edgy, jittery, shaky and was unable to sleep or
concentrate on my work. On one occasion, I thought I was going to have a heart attack because my chest was
pounding. As soon as I get back to my usual dose, I feel fine. I do not use, and have never used, any other drugs.'
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100
Performance Guidelines
You are generally in good health. You do not smoke and rarely drink alcohol. You have not had any serious illnesses,
injuries or accidents, including car accidents. You have never had any fits, falls or faints or any loss of consciousness.
You did feel depressed when your marriage broke up and your business failed, but that has been the only time.
Give the following responses and answers to further questions:
• When or if the candidate mentions addiction or dependency, say that you are aware of some information about
these tablets being addictive, but you don't think it applies to you (for no particular reason), and also your symptoms
on ceasing are evident to you that you have a 'real need'.
• When, or if, the candidate asks about the schedule of your use. respond by saying that you use them only to get to
sleep.
• When or if the candidate goes on to demonstrate to you that you have used more than one per day in the past week,
say that there has been extra pressure at work, and admit that you have taken a few extra. You can expect the
candidate to pursue the issue of quantities used. If the candidate approaches this diplomatically, be cooperative in
uncovering the overuse problem. If the candidate is critical or blaming, or wishes to refer you immediately to a
substance abuse unit or report you to the Health Department, take offence and say you do not want to continue with
the consultation: 'Just give me the script and I will go' or 'I'll sort this out myself.
• When the candidate explains a proposal of a period of monitoring your use and moods or stress, followed by graded
reduction, along with regular appointments, support and resource materials or groups, agree with this management
plan.
• If the candidate refuses to prescribe, take offence and respond as above: 'I'll sort this out myself.
• If the candidate agrees to provide a prescription with no suggested measures or comments such as 'we will talk next
time', accept that and say 'What days do you work. Doc. so that I can be sure to see you next time?'
Be quite at ease and be pleasant. Provide your background history and the development of your habit in a
straightforward way. Respond to questions about your present use as outlined previously.
Questions to ask if not already covered:
• 'So what's the problem with taking these tablets, really?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate should:
• Take a focused history of the patient's use of the benzodiazepine anxiolytic (Serepax®) and history of other
substance and alcohol use and patient mood.
• Advise the patient about the problems of benzodiazepine dependency and outline a plan of management that
includes a gradual reduction in use, along with regular appointments, support and resource material and followup.
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Performance Guidelines
KEY ISSUES
•
Identification and preparedness to address the issue of dependency and overdose.
•
Appropriate language and attitudes in taking the history and discussing the problem.
•
Knowledge of biological and psychosocial management of benzodiazepine dependency.
•
Awareness of the risks of sudden cessation, such as acute withdrawal states, fits, agitation, exacerbation of
anxiety and treatment failure.
CRITICAL ERROR - none defined
COMMENTARY
This station assesses the candidate's ability to identify inappropriate benzodiazepine use and dependency, and to
counsel a patient appropriately. The doctor is presented with the problem of being drawn into maintaining a longterm
benzodiazepine use habit, with clear evidence of over-use (approximately 75% greater consumption than the
prescribed dose). Benzodiazepines are recommended for short-term use only. While they have some place in the
longterm management of chronic severe anxiety, other treatments, including antidepressant medication and
psychological treatments (relaxation techniques, cognitive behavioural or interpersonal therapies) must be applied
first. Longterm prescription needs are to be closely supervised and monitored for over-use, such as in this case.
This case challenges candidates in a number of ways. Chiefly, it requires them to actively and constructively
intervene, not just to provide the prescription (with or without advice) or to just refuse the prescription, thus provoking
the patient to seek out another source, or risking precipitating a withdrawal state. The satisfactory candidate, in
addition to managing the immediate consultation needs, will be aware of community support and self-help groups.
Candidates should demonstrate that they understand the problems of both prescribing further medication without any
review or plan for reduction, and also suddenly stopping the medication. Thus, simply advising the patient that they
will 'talk next time', or refusing to prescribe with no other measures put in place, are both unsatisfactory. Similarly,
referring the patient immediately to a substance abuse unit would be unsatisfactory and counterproductive.
536
3-B: Clinical Procedures
Peter G Devitt and Barry P McGrath
'The hand is the cutting edge of the mind.'
Jacob Bronowski
The term management implies an integrated approach to patient care, focusing on investigation
and treatment.
This section concentrates on aspects of management that involve practical aspects of patient
care. There are certain procedures with which the commencing intern is expected to be fully
conversant and competent. These include at least:
• establishment of elective or emergency venous access for
The junior graduate commencing
infusion of fluids;
internship is expected to be fully
• venesection for collection of blood samples;
• insertion and removal of a urinary catheter (male and
female);
• intramuscular, subcutaneous and intradermal injections;
• cardiopulmonary resuscitation (CPR);
• interpretation of ECGs and basic imaging films;
• use of a glucometer:
• use of inhaler, spacer and nebuliser; and
• understanding of spirometry and pulmonary function
testing.
conversant and competent with
certain core skills, including
antiseptic and aseptic technique,
basic first aid techniques and
primary wound care.
Graduates are expected also to
understand the principles of more
specialised clinical skills, and to be
able to explain these clearly to a
patient.
There are other skills that the individual is expected to acquire progressively under supervision
during internship and should have some understanding of at graduation. Some of these are
ward-based skills and some may be learnt in the emergency or anaesthetic department. These
skills include:
• simple skin suturing;
• use of a defibrillator;
• maintenance of an adequate airway;
• insertion of a nasogastric tube
• performance of an electrocardiogram;
• collection of a sample for arterial blood gas analysis;
• central venous pressure measurement;
• pleural aspiration and peritoneal tap (needle thoracentesis, needle peritoneocentesis);
• nasal packing;
• slit lamp examination;
• anoscopy (proctoscopy/rigid sigmoidoscopy); and
• endotracheal intubation
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3-B
Clinical Procedures
Another group of skills are those which the intern will be expected to observe and perhaps
perform under supervision, but not necessarily demonstrate fully independent competence at
this stage of training. It is important that the principles of these procedures are observed and
understood and can be explained to patients. These skills include, among others:
•
indirect laryngoscopy;
•
lumbar puncture;
•
use of a tonometer; and
•
advanced local anaesthetic and field block including intravenous local block (Bier), and
epidural block commonly used in obstetrics.
A fourth group of skills include those which are not considered suitable for those at intern level,
but which may have been observed by individuals whilst medical students or interns. There is a
common misconception that such procedures need to be learnt at internship, when in reality the
procedures should preferably only be undertaken independently by individuals with already
developed specialist skills. Again, the principles of these procedures should be understood at
intern level, such that they can be explained to patients. These procedures include:
• cricothyroidotomy;
•
insertion of a central venous line;
•
insertion of an intercostal draintube;
•
peritoneal dialysis/lavage; and
•
haemodialysis/haemofiltration.
Missing from these lists are a number of tasks sometimes thought of as procedures, but which
in reality should be considered an essential part of the examination of the patient. These
include:
•
ophthalmoscopy;
•
measurement of blood pressure;
•
otoscopy; and
•
urinalysis.
Specialist and generic endoscopic skills
These are usually confined to performance by specialists in various disciplines and include:
•
nasolaryngoscopy, bronchoscopy;
•
upper gastrointestinal endoscopy - - oesophagoscopy, gastroscopy;
•
lower gastrointestinal endoscopy — flexible sigmoidoscopy, colonoscopy; and
•
arthroscopy, thoracoscopy, laparoscopy.
This section contains some examples of procedures which the intern is expected to be able to
perform competently and be able to explain to a patient.
The following table is an AMC composite checklist of 'Clinical Procedural Skills'. Students are
expected by graduation to understand the principles of all of these, and to be able to explain
them clearly to a patient.
Competence levels expected as regards performance thus varies between those they should
be able to perform and interpret independently (A), perform under supervision and with
guidance (B), or observe and understand principles (C).
538
3-B
Clinical Procedures
Many University Clinical Schools make use of similar student log books indicating acquisition of skills and certification
of their performance under supervision of a clinical tutor. We are grateful to the University Clinical Schools of Adelaide,
New South Wales and of Monash for access to their skills lists, which have been amalgamated into the AMC table.
Other important core skills and principles often violated or overlooked relate to appropriate antiseptic and aseptic
techniques, including such basic aspects as care in handwashing between each patient contact; and skills in regard
to basic first aid techniques and primary wound care, together with knowledge of operating theatre protocols
including donning of gowns, gloves and masks and simple splintage and plastering techniques
Clinical Procedural Skills — Competency Expectations Final Year Key to Competency
Levels
A = ability to perform and interpret independently and explain principles to patient
B = ability to explain principles, perform, and/or interpret with prompting and guidance
C = observe and understand principles, explain to patient
Core skills (Competency Level A)
At the end of final year the student should be able to perform the following age-appropriate skills competently and
without supervision
Competency Level A
Measure and record vital signs: oral, aural and axillary temperature/pulse/respiratory rate/blood pressure
Testing of urine (urinalysis)
Venepuncture (including knowledge of appropriate containers for common tests)
Insertion of peripheral intravenous cannula
Simulated administration of a drug intravenously
Setting up of an intravenous infusion including blood
12 lead ECG — procedure
12 lead ECG — interpretation
Use of auroscope/ophthalmoscope
Basic first aid, including CPR
Application of a simple dressing
Basic trauma management
Basic wound care including burns
Basic life support on a mannikin
Application and removal of a forearm plaster
Insertion of a nasogastric tube
Insertion of a urinary catheter (male and female)
Removal of a urinary catheter
Nasopharyngeal aspiration
Administration of immunisation and knowledge of appropriate schedules
Calculation of common drug dosages
Administration and prescription of oxygen
Give a drug orally
539
3-B
Clinical Procedures
Competency Level A (continued) Give a
drug via eyedrops Give a drug sublingually
Give a drug via an inhaler, a spacer and a nebuliser
Give a drug rectally
Give a drug vaginally
Give a drug intranasally
Give a drug transdermally
Give a drug via intramuscular injection
Give a drug subcutaneously
Hand cleaning, asepsis, awareness of sterility and standard precautions Surgical
scrub procedures
Aware of occupational health and safety (OH&S) procedures about blood and body fluid exposure and
needlestick
Diagnose death, complete a death certificate and a cremation form
Demonstrate knowledge of requirements for reporting deaths to the coroner
Demonstrate knowledge of requirements for detention under the Mental Health Act
Demonstrate knowledge of requirements for notification of infectious diseases
Complete a Workcover certificate
Write a discharge letter from a hospital to a general practitioner/local medical officer
Write a referral letter to a specialist Write a hospital consult request
Write an investigation request form
Interpret standard laboratory medicine reports
Interpret commonly used imaging (CXR, AXR, pelvis, spine and long bones)
Specimen handling
Write a prescription (including Authority and SP) — simulated
Demonstrate use of relaxation therapy
Lifting and patient handling skills
Use of infiltrative local anaesthesia
Simple nerve block, e.g. ring block/peripheral digits
Suturing of a simple wound
Remove skin sutures and staples
Skin biopsy
Wound swab
Throat swab
Skin swab
Cervical smear/use of speculum
Perform the following components of advanced life support on a manikin — intubation Understand principles of
advanced life support on a manikin — defibrillation
540
3-B
Clinical Procedures
Supervised Core Skills (Competency Level B)
Supervised core experience (at the end of final year student has performed or assisted with the age-appropriate skill
under direct supervision).
Competency Level B
Normal vaginal delivery
Arterial puncture
Femoral venepuncture
Management of epistaxis by nasal packing
Syringe an ear
Uncomplicated removal of foreign bodies from eyes, ears and nose
Use of slit lamp microscope
541
3-B
Clinical Procedures
Procedural Skills (Competency Level C)
Observed core experience (at the end of final year student has observed and may have assisted with the skill or
procedure and is able to describe and explain it to a patient simply and clearly).
Competency Level C
Advanced trauma management, including defibrillation/revival
Measurement of central venous pressure Insertion of CVP line
Pleural tap, insertion intercostal catheter/chest drain — management of underwater drainage
Abdominal paracentesis/diagnostic tap of ascitic fluid; peritoneal dialysis/lavage
Suprapubic bladder tap
Lumbar puncture and measurement of CSF pressure
Simple skin excision
Handling an aggressive patient
Joint aspiration (including practice on a model) — knee, shoulder, elbow
Endoscopy — upper Gl tract
Colonoscopy
Flexible sigmoidoscopy
Colposcopy
Fine needle aspiration cytological biopsy for common conditions, e.g. breast, thyroid and lymph node
Liver biopsy
Audiometry
Post mortem examination (autopsy)
Bone marrow biopsy Exercise ECG
Echocardiogram
Coronary angiogram and angiographic procedures
Bronchoscopy
Spirometry — formal lung function testing
MRI and CT imaging
Ultrasound (abdominal, musculoskeletal, breast and obstetric)
Nuclear medicine scans Electroconvulsive therapy (ECT)
Application of a lower limb traction splint
Peter G Devitt and Barry P McGrath
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Clinical Procedures
3-B Clinical Procedures
Candidate Information and Tasks
MCAT 101-104
101
Resuscitation of a 24-year-old man after head and chest injury
102
Fluid balance assessment in a 50-year-old patient after abdominal surgery
103
Evaluation of lung function by spirometry in a 22-year-old man
104
A suspected fractured clavicle in a 20-year-old man
543
101
Candidate Information and Tasks
Condition 101
Resuscitation of a 24-year-old man after head and chest injury
CANDIDATE INFORMATION AND TASKS
You are a Hospital Medical Officer (HMO) in the hospital Emergency Department A 24-year-old man is carried by his
friends into the department, having just driven his car into a telegraph pole immediately outside the hospital. He is
unconscious, barely breathing and with limited chest movement. He vomits as he is carried into the room. His
forehead is bleeding from a head injury from being thrown into the windscreen.
YOUR TASKS ARE TO:
•
Indicate what measures you would undertake to resuscitate him, describe these to the examiner and
perform them on the manikin.
•
Following your initial resuscitative measures his colour improves initially, but another several minutes later it
becomes very difficult to ventilate him even squeezing the breathing bag very firmly, and he becomes deeply
cyanosed. Indicate to the examiner what further physical findings you would seek, and what measures you
would then undertake.
The Performance Guidelines for Condition 101 can be found on page 549
544
102
Candidate Information and Tasks
Condition 102
Fluid balance assessment in a 50-year-old patient after
abdominal surgery
CANDIDATE INFORMATION AND TASKS
You are a Hospital Medical Officer (HMO) on a surgical ward; you have been asked to see a middle aged patient who
had a laparotomy for a perforated duodenal ulcer six hours ago. He has a nasogastric tube in position and an
intravenous line administering 5% dextrose. Serum electrolytes and creatinine done prior to surgery showed no
significant abnormality. Operative findings as recorded were an anterior wall duodenal ulcer perforation which was
oversewn without complication.
The nursing staff are concerned that the patient has not passed any urine since the procedure was completed six
hours ago. The patient had been in good health up to the time of the perforation and had been in severe pain for 12
hours before the operation, and had vomited several times. He has had 500 ml_ of 5% dextrose intravenously since
admission. He has a nasogastric tube in situ draining to the bedside. He does not have a urinary catheter.
YOUR TASKS ARE TO:
• Assess the patient, and determine the cause of his problem.
• Initiate a plan of action: this will include the writing up of any drug, or intravenous or nursing orders.
• Outline your plan and orders to the observing examiner.
• You have six minutes for your assessment and two minutes to describe your management plan and diagnosis.
.
The Performance Guidelines for Condition 102 can be found on page 551
545
103
Candidate Information and Tasks
Condition 103
Evaluation of lung function by spirometry in a 22-year-old man
CANDIDATE INFORMATION AND TASKS
You are seeing this 22-year-old man in a general practice for an examination for insurance purposes. You have
completed the history-taking and the only finding is a history of mild asthma until the age of 11 years. There have
been no symptoms in recent years and no need for treatment. You have examined the respiratory system which you
find is normal. You are asked to evaluate the patient's lung function using a Vitalograph spirometer as illustrated
below. You are also asked to determine the FEX^ (forced expiratory volume in 1 second) and FVC (forced vital
capacity) and then compare these with normal values. After this you are asked to explain the results to the patient.
YOUR TASKS ARE TO:
•
Perform spirometry on this patient.
•
Calculate the FEV, and FVC.
•
Compare the patient's FEV^ and FVC with predicted values.
•
Discuss the results with the patient.
CONDITION 103. FIGURES 1-3.
The Performance Guidelines for Condition 103 can
be found on page 558
546
104
Candidate Information and Tasks
Condition 104
A suspected fractured clavicle in a 20-year-old man.
CANDIDATE INFORMATION AND TASKS
You are a Hospital Medical Officer (HMO) in an Emergency Department. Your patient is a young adult male who fell
heavily onto the point of his right shoulder earlier today.
He presented with pain in the area and you suspected a fracture of the clavicle on that side because of swelling, mild
deformity and localised tenderness.
An X-ray of the area has just been done.
YOUR TASKS ARE TO:
• Examine the X-ray provided.
• Inform the patient of your diagnosis and outline a management plan and answer any specific questions asked
by the patient.
• Commence treatment using the materials provided.
CONDITION 104. FIGURE 1.
The Performance Guidelines for Condition 104 can be found on page 561
547
3-B
Clinical Procedures
3-B Clinical Procedures
Performance Guidelines
MCAT 101-104
101
Resuscitation of a 24-year-old man after head and chest injury
102
Fluid balance assessment in a 50-year-old patient after abdominal surgery
103
Evaluation of lung function by spirometry in a 22-year-old man
104
A suspected fractured clavicle in a 20-year-old man
548
101
Performance Guidelines
Condition 101
Resuscitation of a 24-year-old man after head and chest injury
AIMS OF STATION
To assess the candidates knowledge and ability to clear the patient's airway, perform assisted ventilation, cardiac
massage if necessary and circulatory support for patients with severe trauma.
To suspect, diagnose and perform emergency decompression of a tension pneumothorax.
EXAMINER INSTRUCTIONS
EXPECTATIONS OF CANDIDATE PERFORMANCE
A patient who has a severe combined head and chest injury needs urgent resuscitation:
• Clear the airway — remove aspirate, vomitus.
• Perform assisted ventilation — mouth to mouth, oral airway, ventilate with bag if available, consider endotracheal
intubation.
If initial improvement is followed by significant deterioration and inability to ventilate the patient with an
endotracheal tube in place, the clinician must suspect a tension pneumothorax is present.
Physical findings to be sought:
Percussion and auscultation of the chest reveals tympany, absent or reduced air entry, supported by evidence of
mediastinal and tracheal shift. This confirms the clinical diagnosis of tension pneumothorax on that side and
necessitates immediate insertion of a large bore (18 gauge) needle into the second or third intercostal space anteriorly,
followed by elective passage of an axillary intercostal underwater drainage tube. The candidate should indicate the
tube connections to the underwater drainage bottle.
KEY ISSUES
• Knowledge of the AIRWAY, BREATHING. CIRCULATION priority sequence in management.
CRITICAL ERRORS
• Failure to follow an appropriate priority sequence in management.
• Failure to consider a tension pneumothorax.
• Failure to recommend immediate needle decompression thoracentesis.
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Performance Guidelines
COMMENTARY
Emergency management of severe trauma (EMST) involves primary surveys assessing adequacy of airway
breathing, and circulation by initial assessment; and correcting life-threatening complications by procedures such as
those illustrated in this scenario.
The possibility of neck injury must be born in mind, but adequate ventilation must be achieved or the patient will not
survive. Manual holding of the neck to prevent any further injury during the airway management, is clearly necessary.
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Performance Guidelines
Condition 102
Fluid balance assessment in a 50-year-old patient after
abdominal surgery
AIMS OF STATION
To assess the candidate's ability to manage a common problem — postoperative fluid balance and monitoring.
EXAMINER INSTRUCTIONS
The examiner will arrange the station and will have instructed the patient as follows:
The patient is a middle-aged man in pyjamas, lying in a hospital bed or on a trolley.
A nasogastric tube is in position from nares to bedside, taped appropriately to the face, leading to a nasogastric bag
containing 600 ml_ of 'gastric juice' (malt vinegar).
An intravenous line and cannula is in place taped to run beneath a dressing to left forearm, from a full bag of 500 mL
5% glucose (dextrose) in water.
The fluid balance chart and nursing observations sheet appended is at the foot of the bed This will show the following:
1. Pulse and blood pressure in the normal range since admission and surgery 6 hours ago. Temperature is normal.
2. The nasogastric drainage output is 600 mL since surgery (corresponding with the volume in the bag which has not
been emptied since surgery).
3. Intravenous fluid intake since admission has been
• 500 mL isotonic saline started during the operation and subsequently just finished.
• Intravenous orders as currently written are
~ 500 mL 5% dextrose over 12 hours, then
~ 500 mL 5% dextrose over 12 hours then review
The patient's abdomen has a gauze and plastic dressing over the upper abdomen to cover the simulated vertical upper
midline incision.
Analgesics have been ordered on an as required basis — morphine 10 mg four hourly sub-cutaneously.
Instructions given to the patient are:
You are recovering from surgery from a perforated ulcer. You have some abdominal pain but this has been reasonably
controlled by an injection 30 minutes ago.
You have not passed urine since the operation. If asked, you gave a specimen prior to surgery; you do not feel
currently a need to pass urine. The nurses have asked the doctor to see you because you haven't yet passed urine.
The doctor will look at your charts and examine you. You have a painful cut in the upper abdomen covered by a
dressing and any undue handling will be distressing. You have a tube in your nose ostensibly passing to your stomach
to drain the gastric fluids. You have an intravenous drip in your left arm
If the doctor palpates your lower abdomen say that it is not particularly uncomfortable and you do not feel the urge to
void if abdominal compression is performed. However, palpation of your upper abdomen will be painful as you have
just had an upper abdominal procedure performed.
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Performance Guidelines
If asked other questions say you feel reasonably well apart from the pain in your wound, and you feel rather thirsty
but appreciate that you cannot yet drink.
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate would be expected to check the nursing and fluid balance observations and note the absence of
voiding in combination with minimal intravenous replacement over 6 hours since surgery and in the presence of
continuing nasogastric losses.
Optimal acquisition of data would be by checking intraoperative and postoperative fluid charts, to establish input
since admission and to check for extrarenal losses via gastric tube. The patient should be asked if he feels like
voiding. The normal vital signs should be noted; there are no concerning abdominal signs relevant to surgery. The
bladder is not palpable, gentle suprapubic pressure and absence of desire to void would be checked by
knowledgeable candidates. Checking that the jugular venous pressure is not elevated and examination of tissue
turgor for signs of 'dehydration' would be expected (none is present). The JVP is normal and no peripheral oedema
is present.
Appropriate treatment would be to increase intravenous fluid intake after acquisition of all data, with presumptive
diagnosis of insufficient fluid and electrolyte replacement.
The preferred intravenous fluid to order initially would be an isotonic electrolyte solution (saline, Hartmann
solution, 4% dextrose in 1/5 isotonic saline), rather than dextrose alone, but a dextrose bolus would be acceptable
although not the preferred fluid.
Immediate treatment should be intravenous saline 500 mL over 30-60 minutes or so, with review after this.
These instructions should be stated and written.
Some hospitals possess proprietary (ultrasound-based) equipment which the ward staff can use to make
estimation of bladder volume. This will help determine if the failure to void is due to retention of urine or to
oliguria associated with inadequate fluid replacement.
Candidates may suggest passing a urethral catheter, which would be acceptable with review of amount obtained
and subsequent urine output.
Preferably one would review the patient after giving an initial bolus of fluid. If the patient has not produced any urine
within an hour, a urethral catheter should be passed. Urine obtained would be measured for volume and, if available,
a urinary sodium level should be sought to aid diagnosis.
Complete anuria would be a highly unlikely finding under these circumstances, and the finding of a low urinary
sodium level (less than 20 mmol/L) in a small volume of urine would confirm prerenal circulatory insufficiency with
renal conservation of sodium and oliguria. In subsequent monitoring of his urinary output, one would aim at an output
of more than 30 mL hourly.
Appropriate responses are as outlined. In particular candidates should appreciate that appropriate volume
replacement (after checking for signs of volume overload — venous filling, peripheral oedema, auscultate lung
bases) would preferably be by increased intravenous electrolyte solution replacement (isotonic saline. Hartmann
solution, 4% dextrose in 1/5 isotonic saline) rather than dextrose/water alone. Administration of a diuretic prior to
fluid replacement would indicate a clear fail.
If no commentary or plan is forthcoming by six minutes — the examiner will ask:
•
‘What is your diagnosis?'
•
‘What orders will you give?'
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Performance Guidelines
KEY ISSUES
• Assess the candidate's ability to determine the most likely cause for apparent postoperative oliguria with failure of
early voiding after surgery by examination of nursing and fluid balance data and patient assessment.
• Assess the candidate's ability to take appropriate corrective action and to recognise the need for continued
monitoring and review.
CRITICAL ERRORS
• Administration of a diuretic without previous fluid replacement.
• Failure to order an increased rate of intravenous replacement of appropriate type.
• Failure to suggest continuing review after trial of more fluids.
COMMENTARY
Surgical operations have the potential to upset the normal water and electrolyte balance of the body, in which daily
intakes and outputs are usually finely balanced and equivalent, as shown below in an adult:
CONDITION 102. TABLE 1.
Water Input
Ingested Liquids
Water of food
Water of metabolism
TOTALS
Water Output
1.500 mL
1,000 mL
100-200 mL
2.5-3 litres
=
=
=
=
Urine
Insensible losses
Faecal losses
1,500 mL
1,000 mL
100-200 mL
2.5-3 litres
This simplification is administratively and clinically convenient:
• In normal circumstances measured ingested water balances and equals measured urine production;
• unmeasurable water in food is balanced by unmeasurable insensible losses from lung and skin; and
• unmeasurable water produced within the body, by metabolism of ingested foodstuff, is balanced by unmeasured
water loss in faeces.
Urine output can be monitored daily or more frequently. A urethral catheter is necessary in the severely ill or shocked
patient. A urine output of 40-50 mL per hour is reasonable evidence of satisfactory renal perfusion; urine output relates
closely to renal blood flow in shock states Accordingly, urine output monitoring is one of the most useful guides
we have in following progress of shocked patients. A 24-hour urinary output of 1000 mL or greater is within the
normal range.
Early diagnosis of postoperative oliguria is extremely important. Incipient acute renal failure can often be recognised
early and reversed.
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Performance Guidelines
Changes in Fluid Balance during the Postoperative Period
There is increased secretion of many hormones after surgery (catecholamines, Cortisol and adrenocorticotrophic
hormone (ACTH), aldosterone, antidiuretic hormone (ADH), glucagon, growth hormone) and decreased secretion of
others (e.g. insulin). The net result is that both salt and water are retained temporarily by the kidneys. This results in
a transient and minor fall in urine flow for 24-48 hours after major injury and a dilution of electrolytes in serum and
extracellular fluid. Sodium is also retained, but not to the same degree as water, so sodium is also temporarily diluted.
The reality of this is easily checked by looking at virtually any serum electrolyte measurement after an operation, and
seeing that the levels of ions such as sodium often seem to fall below their normal range, and plasma osmolality is also
lowered. Remember that this effect is a dilutional effect and does not imply a need for giving more ions — quite the
opposite in fact, since ions are already being retained by the kidneys.
After the first 24-48 hours, the hormonal effects on the kidneys progressively disappear, and the kidneys can be
relied on to make good the electrolyte adjustments required by the body — provided they are given enough fluid and
electrolytes with which to work.
Postoperative Water Balance
Obligatory water losses are around 1500 mL per 24 hours (1000 mL insensible loss from lungs and skin, 500 mL
minimal obligatory urine volume). Obligatory water losses may increase after surgery because of tachypnoea or
fever. However, renal losses diminish often to between 700-1000 mL in the first 24 hours. Therefore, 2.5 L per 24 hr
is usually adequate fluid replacement for adults in the first 24 hours after surgery (not 1,5 litres as is currently ordered
in this man).
As the kidneys begin to excrete more water, the amount of fluid should be increased to approximately 3 L per 24
hours. This is the baseline replacement for adults of average spectrum of size and weight. But it must be remembered
that any other losses (e.g. nasogastric suction), must be replaced in addition to the 2.5 or 3 L; and this patient has
already lost an additional 600 mL of gastric aspirate.
Postoperative Electrolyte Balance Sodium
Renal excretion of Na+ diminishes in the first 24 hours after surgery due to increased aldosterone and Cortisol
secretion so there may be no need to give Na+ in this period. However, unidentified losses of Na+ can occur with
injury or surgery (third space losses); and because of the uncertainty, it is more common to see sodium being given
than withheld during this period up to one litre daily, and usually this causes no problems. Nevertheless, it is well to
remember that this is probably in excess to body requirements and sodium should be withheld or given
with caution in elderly patients, or those with failing hearts. This patient has no such problems and we have
evidence of continuing gastric electrolyte losses of sodium.
Once the first 24 hours is past, then sodium requirements return towards normal, and a figure of 150 mmol per day is
adequate (which conveniently is represented by 1 L of normal saline).
With the hormone-driven retention of sodium in the first 24 hours, there tends reciprocally to be increased K+ loss in
the urine. However, this loss is small, and not until after this first 24-hour period is it important to replace K+. Note also
that potassium given intravenously
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Performance Guidelines
immediately after surgery will just tend to be excreted by the kidney. After the first 24 hours 2gm of K+ in a litre gives
26.8 mmol of K; and so if given in 3 L, provides around 80 millimoles K+ a day, which is quite adequate.
Intravenous Fluids Used in Surgery
a) 5% Dextrose in Water: This is isotonic (isosmolar) with extracellular fluid, and is therefore the solution to use if you
think a patient is dehydrated (i.e. deficient in water alone — for example by fever or absence of normal intake) and
needs water. Giving 500 mL of 5% Dextrose intravenously over a short period, say an hour, is a useful manoeuvre
if you think dehydration (i.e. pure water deficit) is the cause of a patient's low urine output. This can be thought of as
giving the patient a drink intravenously. This patient needs a drink of salty water, however — he is being
'de-salinated' by his previous vomiting and peritonitis and by continuing gastric losses.
b) Normal (isotonic) Saline: This is 0.9% NaCI and in one litre contains approximately 150 mmol of Na+ and 150
mmol of CI"; so at 300 millimolar concentration it is roughly similar in equivalence to extracellular fluid — it might be
regarded as unsophisticated extracellular fluid replacement. This form of fluid and electrolyte depletion (ECF) is
by far the one most commonly seen in surgical patients, and gives classical signs (firm woody tongue, decreased
tissue turgor, sunken eyes).
c) 4% Dextrose in 1/5 normal Saline: This is an isotonic solution comprising 4/5 dextrose and 1/5 saline; 1/5 isotonic
Saline (equals 30 millimolar Na) is mixed with 4% Dextrose to increase the tonicity back to that of plasma. Three
litres daily of this solution gives 90 mmol sodium which is usually quite adequate for daily requirements.
d) Solutions such as Ringer-Lactate and Hartmann solution use lactate to increase their tonicity and more closely
mimic extracellular fluid composition. They also contain some of the other cations and anions of extracellular fluid
(K, Ca. Mg. CI) in roughly the concentration found in extracellular fluid. Therefore, they can be regarded as
sophisticated extracellular fluid replacement. However remember that lactate is metabolised in the liver, with the
release of bicarbonate. Thus in acidotic situations it makes good sense to give such solutions; but not if the patient
is alkalotic.
e) Potassium-containing fluids: Potassium is the main cation of intracellular fluid. Potassium requirements are
broadly similar to sodium. But in contrast to sodium, extracellular and intravascular concentrations of potassium are
low (3-5 mmol/L). and high concentrations are cardioplegic and can cause cardiac arrest. So NEVER give
potassium in a higher concentration than 30-40 mmol/L, and preferably do not exceed 26.8 mmol/L (2 gm KCI in 1
litre).
f) Haemaccel: This is used in situations where there has been rapid blood loss and when it is important to maintain a
normal blood volume while awaiting blood for replacement. It consists of sulphated gelatine (produced from
crushed horses' hooves, so it can be allergenic) with an average molecular weight of 30,000 Daltons. It is more or
less isotonic and the gelatine has a half life of between 30-120 minutes, so its use is very much an interim measure
to swell blood volume.
The patient needs isotonic replacement for suspected insufficient ECF ('Saline') replacement together with
replacement of continuing losses (i.e. gastric aspirate), which can be thought of as roughly equivalent to the same
volume of isotonic saline. Intravenous hydrochloric acid cannot be given readily, and gastric juice contains a lot of
sodium as well as hydrogen ion and chloride.
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Distinguishing
•
acute prerenal postoperative oliguria due to prerenal circulatory insufficiency from
•
established acute oliguric renal failure due to acute tubular necrosis, is very important, as the first responds to
volume loading, and in the latter case the kidneys are unresponsive. Apart from the important clinical signs and
the initial response to a bolus loading, help may be obtained from urinary electrolyte findings (Table 2).
CONDITION 102. TABLE 2.
Urinary findings expected in postoperative oliguric patient
Prerenal oliguria (renal circulatory
insufficiency)
Urine sodium
Low (< 20 mmol/L)
Urine osmolality or specific
High (> 1,500 mmol/L) (S.G >
gravity
1020)
High
Urine urea and creatinine
Intrinsic acute oliguric renal failure
(acute tubular necrosis)
High (> 50 mmol/L)
Low (< 1,000 mmol/L) (S.G <
1050)
Low
The urine composition in the instance of intrinsic renal failure resembles an ultrafiltrate of plasma due to impaired
tubular function.
This would be a highly unlikely diagnosis in the current circumstances, with no preoperative evidence of pre-existing
renal impairment, and no evidence of intraoperative complication.
Composition of Abnormal Losses Seen in Surgical Patients
Gastrointestinal fluids all contain significant amounts of sodium and varying amounts of chloride and bicarbonate
(Table 3). For unsophisticated and usually satisfactory replacement of abnormal gastrointestinal fluids one can use
simple isotonic 0.9% saline. The only caveats are with small children whose kidneys are not yet fully capable of
handling sodium loads, and with elderly frail patients with cardiac insufficiency.
CONDITION 102. TABLE 3.
Gastrointestinal Secretions Daily
Fluid
(litres)
Saliva
1.0
Gastric juice
1.5
Bile
Pancreatic juice
Intestinal juice
556
1.0
1.5
2.0
Sodium
(mmol/L)
50
100
Potassium
(mmol/L)
20
15
Chloride
(mmol/L)
40
200
Bicarbonate
(mmol/L)
50
100
150
150
5
5
5-15
40
40
110-150
40
120
5-30
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Performance Guidelines
Note that it isotonic saline is used to replace prolonged bowel fistula losses, deficiencies of potassium and of
bicarbonate are likely to be induced so that more sophisticated intravenous fluids, including special hypertonic
intravenous parenteral nutrition fluids delivered by a central line, may be necessary. For temporary intravenous fluid
management over only several days, simple isotonic intravenous solutions given by peripheral limb lines are all that is
usually required.
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Performance Guidelines
Condition 103
Evaluation of lung function by spirometry in a 22-year-old man
AIMS OF STATION
To assess the candidate's ability to perform and interpret spirometry in a subject with previous asthma.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You are a 22-year-old accountant. You had occasional mild attacks of asthma until the age of 11 years. You required
only occasional bronchodilator treatment with Ventolin®. You have had no symptoms since the age of 11 years. You
jog regularly and play tennis without any limitation. You are otherwise very well.
You have not had your lung function measured previously. Listen carefully to the doctor and do as you are asked.
When performing the first blow do it incorrectly by taking less than a full breath in and blowing out slowly for six
seconds before giving a maximal effort. These manoeuvres should be practised with the examiner before the start of
the first candidate. If the doctor does not give you appropriate instructions repeat the same error.
Only give a maximal effort if instructed to do this.
Questions to ask if not already covered:
•
‘What do the results mean?'
•
If told results are normal, ask 'Does it mean I no longer have asthma?'
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate is expected to:
•
Use a nose clip.
•
Insert a clean mouthpiece.
•
Advise the patient to:
~ undertake a maximum inspiration;
~ give maximum effort during expiration;
~ ensure expiration continues for six seconds, or until candidate comments that the technique was faulty when
the effort can be abandoned; and
~ repeats the manoeuvre until acceptable and reproducible efforts have been achieved; reproducible efforts are
less than 200 mL or less than 5% variation for both FEV1 and FVC.
•
Identifies FEV1 (forced expiratory volume in 1 second) and FVC (forced vital capacity) correctly (do not penalise
for use of wrong scale).
•
Compares patient's FEV1 and FVC with normal values and calculates FEV1 as a percentage of FVC.
•
Disposes of used mouthpiece.
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• Explains test results which are very likely to be normal. Normal results do not indicate that asthma has remitted; they
indicate that at present there is no evidence of airway obstruction
KEY ISSUES
• Approach to patient — gives clear advice and corrects errors with constructive advice.
• Familiarity with test equipment
• Performance of procedure or task — detects errors and obtains reproducible efforts.
• Interpretation of investigation — accurately calculates FEV1 and FVC.
• Patient counselling — explains test results.
CRITICAL ERRORS
• Failure to recommend maximal inspiration
• Failure to recommend maximal expiratory effort.
• Failure to calculate FEV1.
COMMENTARY
The diagnosis and ongoing management of asthma require objective measurements of reversible airways obstruction
using pulmonary function tests. The diagnosis of asthma is usually confirmed by spirometry measurements before and
after the administration of inhaled, short-acting β-agonist bronchodilator.
Although spirometry is ostensibly a simple test that can be performed in a medical practitioner's office and requires the
recording of a forced expiratory volume-time curve using a spirogram, there are some pitfalls that must be avoided to
ensure that valid and accurate results are obtained.
Patient education is critically important to ensure compliance and best effort by the patient. Forced expiratory volume
measurement must be recorded from a state of maximal inspiration. All expired air must be captured and nasal air
escape or escape of expired air around the mouthpiece due to poor sealing of the lips around the mouthpiece, or
partial tongue obstruction of the mouthpiece, can give false readings
The two key components of the test result are the forced expiratory volume that is produced in the first second (FEV1)
and the percentage this contributes to the total expiratory volume or forced vital capacity (FEV1/FVC). Typical
examples are shown in the figures.
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CONDITION 103. FIGURE 4.
Most patients with asthma will show FEV1 < 80% predicted normal value and FEV1/FVC < 80% predicted normal
value plus a significant (>10%) increase in FEV1 after bronchodilator. The following factors are taken into account in
determining predicted normal values: age, gender, weight, height, surface area.
Some patients with asthma will have normal spirometry test results, but sensitivity of airways to bronchoconstrictor
stimuli and additional pulmonary function tests, including lung volume and diffusing capacity measurements, can be
assessed further in a specialised pulmonary function laboratory.
CONDITION 103. FIGURE 5
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Condition 104
A suspected fractured clavicle in a 20-year-old man
AIMS OF STATION
To assess the candidate's ability to recognise a fractured clavicle on an X-ray film of the shoulder area (the degree of
deformity is mild so that open reduction/fixation is not indicated), and to advise and initiate appropriate treatment by
clavicular restraint.
EXAMINER INSTRUCTIONS
The examiner will have instructed the patient as follows:
You fell heavily onto the point of your right shoulder earlier today. The area has been painful since. Movement of the
shoulder increases the pain. You have sought medical advice — the doctor has examined you and arranged for an
X-ray of your shoulder. This has just been done.
The doctor will now discuss the injury and its treatment with you. Ask the doctor to show you the fracture on the X-ray.
Opening statement
‘Is a bone broken, doctor?'
Questions to ask unless already covered (answers in parentheses after questions):
• 'How long will I need to keep the arm in the sling?' (Until review at two weeks)
• 'Can I remove the sling to exercise my elbow?' (Yes)
• 'What about in bed?' (Elevate shoulder and arm on pillows)
• 'Do I have to have it X-rayed again?' (Not if clinical union proceeds normally)
• 'Will there be any disfigurement?' (Minor residual bony thickening)
• 'When will I be able to go back to work?' (Depends on work and progress in regaining use of arm — often 2-4
weeks)
EXPECTATIONS OF CANDIDATE PERFORMANCE
The candidate is expected to diagnose the clavicular fracture and to begin appropriate conservative treatment with a
supportive sling or other clavicular restraints.
The candidate should:
• Tell the patient what is wrong and what will happen including a time frame for treatment.
• Commence treatment demonstrating skill in maintaining alignment of the clavicular fragments using methods which
will pull the whole shoulder girdle upwards and backwards (figure of eight bandaging or clavicular restraint shoulder
rings tied together at back): and which immobilise and support the shoulder by the use of a sling. A well applied sling
elevating and supporting the arm would be the most appropriate form of treatment with this minimally displaced
fracture.
• Avoid complications by testing for excessive tightness of the bandage/rings, advising finger, wrist and elbow joint
exercises, removal of the sling after 7-10 days, and the bandage/rings if used, after three weeks when there is
clinical evidence of union beginning (unduly prolonged immobilisation can result in a stiff shoulder).
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KEY ISSUES
•
•
Ability to recognise fracture of clavicle on X-ray.
Skill in treatment by optional use of figure of eight bandage or clavicular restraint shoulder rings; sling for arm
and forearm (supporting shoulder).
CRITICAL ERRORS
•
Failure to recognise fracture on X-ray.
•
Failure to apply some form of appropriate shoulder and arm support
COMMENTARY
Fractures of the clavicle are common in younger patients from falls on arm or shoulder. The usual break occurs at
the midclavicle and the outer fragment is carried with the arm downwards and forwards, while the inner fragment
usually rides up giving a step deformity. Healing is usually rapid with conservative treatment — nonunion can occur
but is rare.
Treatment consists of elevating and supporting the arm with a sling which helps relieve discomfort and helps to
minimise displacement. Application of a sling is illustrated (Figures 2-5)
Additional clavicular restraints can be used such as a figure of eight bandage, or shoulder rings tied together from
behind to brace back the shoulders into the 'position of attention'. All of these tend to loosen quickly and to require
frequent adjusting. Union is usually accompanied by a localised boss of exuberant callus. Remoulding occurs in the
young with time and the cosmetic result is usually acceptable. Return of full arm function is also usual.
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CONDITION 104. FIGURE 2.
CONDITION 104. FIGURE 3.
CONDITION 104. FIGURE 4.
CONDITION 104. FIGURE 5.
Application of a supportive sling
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4
Integrated Diagnosis and
Management (D/M>
4-A: Clinical Perspectives and Priorities
Bryan W Yeo
'Experience is the mother of truth; and by experience we learn wisdom.'
W Shipperton (1736-1808)
INTRODUCTION
Clinical perspective is an essential skill that every clinician
must strive to develop. It is never fully achieved, but should be A 22-year-old man with central
steadily improved and refined throughout the lifetime of the abdominal pain which shifts to
clinician. Proper perspective facilitates patient management, the right iliac fossa, with
avoids unnecessary delay, allows better cost-effective anorexia and local tenderness
treatment and achieves better communication with the patient, and rebound tenderness at
McBurney point needs an
especially when the prognosis is poor.
appendicectomy, and not a
Common things are common. This must be kept in mind as it
white count, CT or ultrasound
helps priority-oriented management. Dysphagia associated
scan of the abdomen or a battery
with an oesophageal stricture could conceivably follow a
of other unnecessary tests. This
lightning strike to a sword swallower but is much more likely to
basic maxim regrettably
be due to one of two common causes — chronic reflux
continues regularly to be
oesophagitis or a carcinoma of the oesophagus.
overlooked in hospital
Pain in the right iliac fossa always raises the possibility of emergency departments.
appendicitis. Episodes of spontaneously resolving nonspecific
abdominal pain with minimal local signs are commonly seen in general practice, but persisting
acute local pain with tenderness and guarding in the right iliac fossa of the abdomen is most likely
due to one of three conditions — appendicitis, a tubal-ovarian problem (ovarian cyst, salpingitis,
ectopic pregnancy), or a urinary tract problem (urinary calculus or infection). These should be
considered first in the diagnosis before other less common causes (of which there are many). A
22-year-old man with central abdominal pain which shifts to the right iliac fossa, with anorexia
and local tenderness and rebound tenderness at McBurney point needs an appendicectomy, and
not a white count, CT or ultrasound of the abdomen or a battery of other unnecessary tests. This
basic maxim regrettably continues regularly to be overlooked in hospital emergency
departments.
Perspective skills improve with accurate knowledge of the underlying anatomy and physiology. A
forty-year-old woman with abdominal pain and signs of peritonitis in the right upper quadrant of
the abdomen is most likely to have acute cholecystitis associated with gall stones. But also keep
in mind a common condition such as appendicitis occurring in a less common site like the upper
right quadrant.
Simply diagnosing that a patient has 'gallstones' is not enough. The site of the gallstones is
critical to the patient's condition and a priority in diagnosis. Correct siting determines the correct
timing of surgical treatment with the least risk of serious complications. A patient with severe
acute cholecystitis due to a stone obstructing the cystic duct should undergo cholecystectomy
within five days of the onset of the attack. A patient with pancreatitis due
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Clinical Perspectives and Priorities
to gallstones passing through the common bile duct is best managed initially with conservative treatment of the
pancreatitis; cholecystectomy is performed when the pancreatitis has subsided in the second or third week of the
initial admission. Thus, the particular complication caused by the gallstones will prioritise the timing of the surgery.
Never is there a more important need for clinical perspective than in discussion with a patient who has surgery for a
malignant disease. After resection of a colonic carcinoma, the subsequent development of malignant ascites
associated with peritoneal metastases is an indication that the patient is unlikely to be helped by further surgery in
the form of an open laparotomy. Furthermore, this later occurrence of ascites would have been predicted as a likely
future complication after the first operation when the histopathology had revealed that the carcinoma had spread
through the full thickness of the bowel into the omentum and pericolic tissue. Discussion of the prognosis with the
patient after the first operation would be guarded and with discretion, based on the spread of the carcinoma identified
in the histopathology of the resected bowel. Similarly, a patient with carcinoma of the pancreas and back pain due to
lymphatic or perineural spread of the carcinoma is unlikely to be cured by a pancreatic 
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