Case 5

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SHOCK

Case presentations and CVS

Monitoring

Case 4

A 29-year-old lady (72 kg) arrives in the resuscitation room drowsy with the following vital signs:

• BP 80/50 mmHg,

• pulse 130 per minute,

• RR 28 per minute,

• Sa02 95% on 10 L/min O2 via a reservoir bag mask,

• temperature 38.5

° C.

She has a petechial rash on her trunk.

ABG: pH 7.31

Pa02 35.5 kPa

PaC02 3.5 kPa bicarb 12.7mmol/L

BE-10.

She responds to voice and there is no neck stiffness.

Her bedside glucose measurement is 6.2 mmol/L

Q1: What is your diagnosis?

Q2: What is your management?

Case 4

“A” - ensure a patent and protected airway, give a high concentration of oxygen (for example, 15 L/minute via a reservoir bag mask),

“B” - assess and treat any breathing problems,

“C” - assess and treat any circulation problems,

“D” - assess conscious level and check for Temp & UO.

The petechial rash is a clue to the possible cause of sepsis – think meningococcal and/or staphylococcal infections.

A full examination and appropriate investigations

(including CT/MRI, CSF and other cultures) should follow.

Modified Early Warning Score (MEWS) – useful tool in recognition of patients with presumed infection

Score 3 2 1 0 1 2 3

BP SYS < 80 80-89 90-109 110-160 161-180 181-200 >200

PULSE < 40

RESP.

TEMP.

40-50 51-100 101-110 111-129 >130

< 8 -

-

8-20 21-25 26-30 >30

<35 35.1-37.9 38.0-38.4 >38.5 -

AVPU New New

C onfusion

Alert Voice Pain Unrespon

W eakness sive

-----------------------------------------------------------------------------

If Score 3 in one category or total Score 4 - Think infection!

2 Signs and symptoms of infection (SSI) plus presumed infection = Sepsis

Two or more of the following :

Tachycardia > 90 bpm

Core temperature > 38.3

° C < 36 ° C

Tachypnoea > 20 bpm

WCC >12,000 or <4,000 or >10% immature neutrophils

Hyperglycaemia in the absence of Diabetis Mellitus

Q: Is there at least one organ failure already?

Septic shock - Acute circulatory failure unexplained by other causes.

Infection SSI Sepsis

Severe sepsis

Death

Septic shock

– is defined as

Severe sepsis with hypotension refractory to adequate volume resuscitation ,

Hypotension is defined as a systolic blood pressure of <90mmHg or a reduction of >40mmHg from baseline )

Sepsis with signs of at least one acute organ dysfunction (organ failure)

Cardiovascular

Unexplained metabolic acidosis

Central nervous system

Respiratory

Renal

Hepatic

Haematologica

SSI - Signs and symptoms of infection

Case 4

Patient has Severe Sepsis according to the SSC.

Fluid resuscitation using crystalloids or colloids 20-40 ml/kg/hr

Blood cultures and Lactate taken ASAP

Antibiotics administered within 1 hour

If BP is not responsive to fluids or if serum lactate is still elevated consider CVP, Invasive Arterial line for ABG and CVS monitoring

Repeated boluses of crystalloid/colloid 250-500 ml every 30 min until

CVP 8-12 mmHg

Vasopressors via central line if MAP < 65 mm Hg during and after adequate fluid resuscitation - Noradrenaline (4 mg in 50 ml of 5%

Dextrose - start at 0.05 mcg/kg/min) or Metaraminol infusion.

If Scv O2 < 70 % after adequate fluid replacement and Noradrenaline running, start Isotopes (Dobutamine at 2.5 mcg/kg/min or Adrenaline infusion via central line) and/or give RBC’s (to keep Ht above 30)

Case 5

A 53 year old motorcyclist is brought by Air

Ambulance having been involved in a high speed RTA with a truck.

Blood pressure is unrecordable, pulse is not palpable, except in carotid and femoral regions

A 14G cannula has been inserted by ‘ cutdown ’ in the left great saphenous vein, NaCl 0.9% running

He is intubated and ventilated

Q1: What are the possible causes of his low BP?

Q2: What should the management comprise?

Case 5

Management plan

:

• ABC approach

• Volume resuscitation

• Achieve stability

• Transfer to CT scan for ‘ Trauma series ’

• Act upon findings

A and B are checked and cleared

• No pneumothorax detected clinically

• CXR confirms no extrapulmonary air

Case 5

Circulation:

• Despite on-going IV fluid infusion, BP is difficult to record via NIBP monitor

• Additional venous access obtained (14G) - bloods are taken and Hartmann’s 1000 ml given stat.

• Radial Arterial line inserted, showing invasive pressure of 76/42 mmHg

Q1: What might be happening?

Q2: What could be done to investigate?

Case 5

FAST scan

• Suggests some free fluid in abdomen

• Small amount of fluid in pericardium

• Otherwise normal but empty heart appearance

• BP is very low - patient is not stable for CT scanner or theatre.

Q1: How does this help you?

Q2: What could be done, in view of the continuing instability?

Case 5

In view of possible intra abdominal bleeding

2 units of O (I) Neg blood and 1L Colloids given,

In order to support BP:

• Metaraminol IV boluses given every 3-5 mins,

• Subclavian CVC line is obtained and Noradrenaline infusion started by ITU Registrar

• But HR is now 150, BP is 46-51 mmHg systolic.

• Patient is in PEA arrest, +/- drug induced SVT ??

CPR started with Adrenaline given every 3 min.

Q: What else could be done to save life?

Case 5

CPR:

• 3 minute cycles with 1 mg Adrenaline given each time

• BP is unresponsive to drugs, only to CPR

• Massive Transfusion Protocol (MTP) is activated and another 6 u-ts of O (I) Neg blood given

Thoracotomy for open compressions in A&E

• Descending Aorta clamped

• Blood pressure improves somewhat (110/60)

• Heart is pumping well, massage stopped

• Patient is more stable now, can go to CT scanner

Case 5

CT results

• Small splenic and liver injuries (both Grade 2)

• Undisplaced T6 spinal fracture, no brain injury

• Femoral fractures

Went to Theatre for Laparotomy + Orthopaedics

• Spleenectomy, but only mild blood loss in abdomen

• Aortic clamp removed, chest drain placed

• Ex-fix placed on femur to prevent bleeding

• CVP reading is low CVP (~2 mmHg)

• Requiring moderate dose of noradrenaline to maintain adequate blood pressure

Q: Why is the blood pressure still poor?

Case 5

In Critical Care

• Intubated, ventilate, positive fluid balance is almost

10.5 litres;

• Patient noted to be moving arms but not legs;

• When woken up from sedation completely, still could not move legs

• MRI shows cord damage at T6 level

• Discharged from ITU in 2 weeks with some neurological improvement

Presumably spine was displaced enough to damage cord then returned to normal anatomical position

Questions

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