An Introduction to Patient Safety Pat Croskerry MD, PhD Patient Safety Officer Course CPSI, Ottawa April 2011 ‘It may seem a strange principle to enunciate as the very first requirement in a Hospital that it should do the sick no harm’ Florence Nightingale Notes on Hospitals, 1859 The case of Sandra Geller 2004 Sandra Geller • • • • • • • 68 y/o with CAD Elective CABG - -> Sx went well Lung infection developed on respirator Small CVA ARF -> short term renal dialysis 2 weeks in ICU, ready for floor Generalised seizure Sandra Geller • • • • • Intubated without difficulty Did not desaturate significantly CT scan – nothing new Remained in a coma for 2 weeks Life support withdrawn in accordance with her wishes in living will • Died The Slip in her Care • • • • • 1 hour after seizure Nurse cleaning up bedside table Found two medication vials Similar size, shape, with similar labels One was heparin, the other insulin This is an example of an adverse event (AE) Adverse Event An event of commission or omission arising during clinical care causing unintended physical or psychological injury to a patient, their family or friends, and not due to the underlying disease process. It may result in prolonged hospital stay, temporary or permanent disability, or death. Adverse Events • • • • • • • • • • • • • • Delayed or missed diagnoses Medication errors Wrong side surgery Wrong patient surgery Equipment failure Patient identity Transfusion errors Mislabeled specimen Patient falls Time delay errors Laboratory errors Radiology errors Procedural error Sexual or physical assault • Lost, delayed, or failures to follow up reports • Retention of foreign object following surgery • Contamination of drugs, equipment • Intravascular air embolism • Failure to recognise hypoglycemia • Failure to treat neonatal hyperbilirubinemia • Stage lll or lV pressure ulcers acquired after admission • Wrong gas delivery • Deaths associated with restraints/bedrails How do we know an AE has occurred? • • • • • • • • Voluntary reporting Mandatory reporting Informal Direct observation Patient complaint Medico-legal action Medical records Chart review Determinants of Adverse Events • The People • The System The System HFE Healthcare Workers Adverse Event Sources of System Error • • • • • Overall culture Education/Training System design / HFE Resource availability Demand/Volume Medical environments are highly variable and the safety threats and the barriers to control them vary from one to another From the relative quiet of an oncology clinic… Long waits to be seen Noise Phone calls Fatigue Teaching obligations Many sick patients Work area design Dim lighting Faulty communication Multi-tasking Shift work Constant interruptions Need to hurry Lack of resources Faulty or missing processes Uncertainty Full bladder Home stress New trainees Multi-tasking Hunger Violence Ambiguity Short-staffed Technology won’t work Availability of consultants Angry patients How long have we been aware of adverse events? 120 60 0 1939 1970 Year 1998 MILESTONES 1991 Harvard Medical Practice Study 1995 Quality in Australian Health Care Study 1996 Annenberg conferences 1999 Colorado / Utah Study 1999 IOM Report: To Err is Human 2000 BMA/BMJ London Conference on Medical Error 2000 SAEM: San Francisco Conference on EM Error 2000 NHS report: An Organization with a Memory ____________________________________________________ 2001 1st Halifax Symposium on Medical Error 2001 RCPSC National Steering Committee on Patient Safety 2002 RCPSC Report: Building a Safer System 2004 Canadian Institute of Patient Safety 2004 Baker-Norton Report on Canadian Adverse events 2002–9 Halifax Series of Symposia on Patient Safety Study Adverse Event Rate (%) % Due to error or negligence Number Of Patient Charts HMPS 3.7 27.6 30,121 QAHCS 16.6 51.2 14,210 UK 11.7 48.0 1,014 NZ 6.3 36.1 6,579 Denmark 9.0 Canada 7.5 36.9 3,745 Sweden 12.3 1967 10% On average, about one in ten hospitalised patients suffer an adverse event 50% On average, about half of all adverse events are considered preventable Anesthesia as the Principal Cause of Death 1948 (U.K.) Macintosh: ‘all anesthetic deaths are preventable’ • • • • 1955-59 (U.S. Phillips) 1961 (U.S) 1982 (U.K.) Current ~ 6% ~0.12 ~ 0.01 ~ 0.0005 (5 per million) Comparison of Risk in Health Care With Other Industries Lives Lost/ Year HIGH RISK (>1/1000) MODERATE RISK HEALTH CARE MINIMAL RISK (<1/100,000) Driving Bungee jumping Chemical Manufacturing Commercial Aviation Number of Encounters Nuclear Power Modified from R. Amalberti and L. Leape The extent of the problem in the US • 100,000 deaths annually due to medical errors (7 th leading cause of death) • Revised estimate (2004) put rate at 195,000 • Motor vehicle accidents - 43,000 • Breast cancer - 42,000 • AIDS - 17,000 • Error cost in mid-1990s: $29 billion annually Error problem The Canadian Adverse Events Study: the incidence of adverse events in hospital patients in Canada Baker, Norton et al., CMAJ 2004 Canadian Adverse Events Study (CAES) • • • • • • In the year 2000 20 acute care hospitals 5 provinces (BC, Alberta, Ontario, Quebec, NS) 3,745 adult patient charts Medical and surgical admissions No pediatric, obstetric or psychiatric cases CAES • Adverse event rate 8% Extrapolates to 185,000 annually • Preventable adverse events ~ 37% Extrapolated preventable AEs annually ~ 70,000 • 5% AEs had permanent disability Extrapolates to 3422 preventable annually • Death rate from preventable AEs was 0.66% with 95% confidence interval of (0.37-0.95) • Extrapolates to preventable deaths in range 9000-24,000 annually CAES • Patients with an AE spent additional 6 days in hospital • Average cost ~ $5000 • Total preventable AEs annually ~70,000 • Potential cost saving >$300 million Why has it taken until now to find this out? Striving for Perfection ‘Among the powerful barriers to making progress in patient safety is an attitude of complacency induced by the rarity of serious events and the general human bias toward assuming that things will work as they are supposed to’. Lucian Leape, 2002 The (historical) Culture of Silence Culture of Silence • • • • • • • • First do no Harm Denial Power to Heal Peer Disapproval Professional Censure Legal Implications Livelihood Discomfort Disclosing an adverse event (an example from the ED) Ergonomics (Human Factors Engineering) Poor ergonomic design in healthcare • • • • • • Space organization Information Technology Hand-wash stations Lighting Monitors Infusion pumps Poor Ergonomics • Inconvenience worker and may make workplace unsafe • In healthcare setting may also make patient unsafe WHY NOT DISCLOSE ERROR ? • • • • • Error is trivial Most errors do not cause harm Patient is ignorant about the concept of error May impair the patient’s trust in the system May force search for alternatives Change began about 15 years ago Culture of Silence to a Culture of Safety Two Major Errors in Sandra’s Case • Medication error • Cognitive error Prescription Transcription Dispensing Administration Monitoring The Medication Process Medication process • Up tp 50 steps between a doctor’s decision to order a medication for a hospitalized patient and the actual delivery of the medication to the patient • Even if all 50 go right 99% of the time, the chances of an error are about 40% Prescription MEDICATION ERRORS Transcription Dispensing Misconnection Administration Connection Errors Disconnection Monitoring Medication Error Components in Sandra’s Case • • • • • • • Multi-tasking Attentional capture Common final act Look alike vials Tight coupling Lack of forcing function Other Cognitive Error Components in Sandra’s Case • • • • • • Setting Patient well known Search satisficing Premature diagnostic closure Metacognitive failure Other 3 Main Categories of Error in Individual Performance • Cognitive • Procedural • Affective Procedural Error • Error which arises in the performance of a particular procedure • e.g. sterile technique, suturing, cast-application, chest tube, LP, central line, intubation • Mostly combined visual/motor/touch skills • Critically dependent on teaching/experience • Requires maintenance 96 Skill 72 Acquisition 48 24 0 7 11 15 19 23 27 31 Weeks Bryan and Harter, 1899 Laparoscopic Choleycystectomy CBD injuries by X20 after ~12 cases The Hernia Factory (Boutique hospital) • • • • • • • Shouldice hospital About a dozen physicians Some without surgical training Each does ~ 600-800 operations/year Hernia operation ~ 30-45 minutes Recurrence rate ~ 1% (vs 10-15%) Cost ~ 50% less Affective Error Occurs when physician’s emotional state influences clinical decision making … if your mental state is disturbed, full of emotion, it is very difficult to cope with problems, because the mind that is full of emotion is biased, unable to see reality. So whatever you do will be unrealistic and naturally fail. 23 November 2010 Our affective reactions to patients are often our very first reactions, occurring automatically and subsequently guiding information processing, judgment, and decision making… Zajonc, American Psychologist, 1980 The Borderline Patient ‘The patient presenting with a personality disorder may often be recognized by the characteristic effect the interaction has on the physician and medical staff. Antisocial patients, for instance, are disliked immediately. They seem to be in control of their behavior, unlike psychotic or depressed patients, but nonetheless have repeatedly engaged in maladaptive behavior’ Sources of Affective Error • Ambient - induced Transitory affective states Environmental Stress, fatigue, other • Clinical situation - induced Counter Transference Fundamental Attribution Error Specific affective biases • Endogenous Circadian, infradian, seasonal mood variation Mood disorders Anxiety disorders Emotional dysregulatory states Lancet, 2008 Acad Emerg Med, 2007 Diagnostic Failure: A Cognitive and Affective Approach Research In Advances in Patient Safety: From to Implementation, 2005 Pat Croskerry Abstract Diagnosis is the foundation of medicine. Effective treatment cannot begin until an accurate diagnosis has been made. Diagnostic reasoning is a critical aspect of clinical performance. It is vulnerable Cognitive Error • • • • • • A failure in rational/logical thought Often due to biases or ‘dispositions to respond’ About fifty known biases exist They are universal They are predictable They can be corrected (cognitive de-biasing) Origins of diagnostic error in 100 patients (Graber et al 2004) No-Fault Factors Only (7%) System-Related Error Only (19%) Both SystemRelated And Cognitive Factors (46%) Cognitive Error Only (28%) 30 Cognitive Errors Aggregate bias Anchoring Gender bias Psych-Out Errors Hindsight bias Representativeness Ascertainment bias Multiple alternatives Availability Omission bias Search satisficing Sutton’s Slip Base rate neglect Order effects Commission bias Outcome bias Unpacking principle Confirmation bias Overconfidence Vertical line failure Diagnostic creep Playing the odds Attribution error Posterior prob. Gambler’s Fallacy Premature closure Triage-Cueing Visceral bias Ying-Yang Out Zebra retreat