The Critical Vector · Workshop

Human Factors: The Clinician as Part of the Treatment

Four ideas that circulate as self-help (checklists, presence, shift habits, and carrying the hard cases) each have a clinical evidence base. This guide keeps the parts that hold up and ties each one to the bedside.

VERIFIED12 primary sources, PubMed-verified
ChecklistsPause points that prevent harm PresenceCommunication patients and teams can feel Shift performanceFatigue, fuel, and sleep Carrying the weightMoral injury and peer support
01

Checklists

1.5% → 0.8%
Inpatient deaths after the 19-item WHO Surgical Safety Checklist, 8 hospitals (Haynes 2009)
11% → 7%
Major complications, same study
StudyChecklistResult
Haynes 2009, 8 hospitalsWHO Surgical Safety ChecklistDeaths 1.5% → 0.8%; complications 11.0% → 7.0%
Pronovost 2006, 103 Michigan ICUsCentral line insertion bundleCatheter bloodstream infections down by up to 66%, sustained to 18 months
Arriaga 2013, 17 OR teams (simulation)Crisis checklists (arrest, hemorrhage)Missed critical steps 23% → 6%; every team did better with the checklist
Urbach 2014, 101 Ontario hospitalsMandated WHO checklistNo significant change: mortality 0.71% → 0.65% (OR 0.91, 0.80–1.03)

The counterweight. When Ontario mandated the same checklist province-wide, operative mortality and complications did not fall significantly (Urbach 2014). The successes share a pattern: teams that trained on the list, owned it, and used it at a real pause point. A checklist works when the team uses it, not when it exists. Design and buy-in are the intervention.

Building one that gets used (adapted from Gawande):

1
Pick the pause point: the moment a mistake becomes expensive or impossible to undo (before induction, before incision, before the tube comes out).
2
Choose the type. DO-CONFIRM: work from memory, then stop and verify. READ-DO: read each step and do it, for rare or high-stakes tasks.
3
Killer items only: the steps most often skipped and most harmful when they are. Five to nine items.
4
One line each, answerable yes or no, readable in under a minute. Replace "check" and "ensure" with a concrete action.
5
Force one conversation: what gets said aloud, by whom, before what.
6
Run it, then revise. A checklist that survives its first real use unchanged wasn't tested.

The extubation rescue plan in extubation-decision-protocol is a four-item READ-DO checklist at a pause point.

02

Presence

The "confident person" behaviors, translated to the bedside and the resuscitation bay.

BehaviorClinical versionEvidence
Greet firstIntroduce yourself by name and role, every patient, every timeHOLDS Basic courtesy; patients often can't name who treated them
Sit downSit at the bedside for the conversationHOLDS In a randomized pilot, patients perceived a seated physician as staying longer, though actual time didn’t change, and reported better understanding
Listen without interruptingAsk “what else?” and let the opening statement finishHOLDS Clinicians asked for the patient’s agenda in only 36% of recorded visits; when they did, two-thirds interrupted, at a median of 11 seconds. Uninterrupted patients needed a median of 6 seconds.
Pause before answeringSilence after bad news; let the family speak firstHOLDS A core step in structured serious-illness communication
Speak slower, steady paceCalm, audible commands in a code; closed-loop communicationHOLDS Closed-loop communication is a core element of crisis resource management
Phone out of sightDevice down during family meetings and handoffs; use a structured handoffHOLDS The I-PASS structured handoff cut medical errors 23% and preventable adverse events 30% across 9 hospitals, without lengthening handoffs (2.4 vs 2.5 min per patient)
03

Shift performance

The "75-day non-negotiables," graded against the evidence.

RuleVerdictWhat the evidence supports
10,000 steps a dayADJUSTMortality benefit rises with steps and levels off around 6,000–8,000 a day in people over 60, and 8,000–10,000 in younger adults. More is fine; 10,000 isn't a threshold.
Lift 3 times a weekHOLDSResistance training twice or more a week is the standard recommendation. Scheduling it next to a shift is a reasonable adherence tactic.
Protein 0.6 g/lb (about 1.3 g/kg)HOLDSAbove the 0.8 g/kg RDA and within the range used to support resistance training.
Bring real foodHOLDSPlanned meals beat vending-machine decisions made while fatigued.
Thirst is mistaken for hungerWEAKLittle direct evidence. Drink to thirst and urine color; don't use water to suppress hunger.
No caffeine after noonADJUST400 mg of caffeine taken even 6 hours before bed significantly disrupted sleep (Drake 2013). The rule is "none within about 6 hours of planned sleep," which on nights means none in the last third of the shift, not "after noon."
2-minute resetHOLDSBrief breaks and breathing exercises are low-cost and reasonable; the clinical version is a deliberate pause before a high-stakes procedure.
Phone out of the bedroomHOLDSPre-sleep screen use is linked to later sleep onset and poorer sleep.

Missing from the list: fatigue itself, the habit with the strongest evidence.

Interns working traditional 24-hour shifts made 35.9% more serious medical errors and 5.6 times as many serious diagnostic errors than on a schedule without extended shifts (Landrigan 2004).

After an extended shift, the odds of a motor vehicle crash were 2.3 times higher and of a near miss 5.9 times higher; each extended shift in a month raised the risk of a crash on the commute home by 16% (Barger 2005).

Protect dark, quiet sleep after nights, nap where allowed, and treat the drive home as the riskiest part of the shift.

04

Carrying the weight

Moral injury is the distress of being part of, or unable to prevent, outcomes that violate one's sense of what's right: rationed care, families saying goodbye by video, patients dying alone. The pandemic produced it at scale. The second victim effect is the related distress after an adverse event or error.

Acknowledging the people who worked through the pandemic is not political. Public health decisions will keep being debated; the clinicians who carried those years still need support.

05

Sources

  1. Haynes AB, Weiser TG, Berry WR, et al. A surgical safety checklist to reduce morbidity and mortality in a global population. N Engl J Med. 2009;360(5):491-499. doi:10.1056/NEJMsa0810119
  2. Urbach DR, Govindarajan A, Saskin R, et al. Introduction of surgical safety checklists in Ontario, Canada. N Engl J Med. 2014;370(11):1029-1038. doi:10.1056/NEJMsa1308261
  3. Gawande A. The Checklist Manifesto. Metropolitan Books; 2009.
  4. Singh Ospina N, Phillips KA, Rodriguez-Gutierrez R, et al. Eliciting the patient's agenda: secondary analysis of recorded clinical encounters. J Gen Intern Med. 2019;34(1):36-40. doi:10.1007/s11606-018-4540-5
  5. Swayden KJ, Anderson KK, Connelly LM, et al. Effect of sitting vs. standing on perception of provider time at bedside: a pilot study. Patient Educ Couns. 2011;86(2):166-171. doi:10.1016/j.pec.2011.05.024
  6. Pronovost P, Needham D, Berenholtz S, et al. An intervention to decrease catheter-related bloodstream infections in the ICU. N Engl J Med. 2006;355(26):2725-2732. doi:10.1056/NEJMoa061115
  7. Arriaga AF, Bader AM, Wong JM, et al. Simulation-based trial of surgical-crisis checklists. N Engl J Med. 2013;368(3):246-253. doi:10.1056/NEJMsa1204720
  8. Starmer AJ, Spector ND, Srivastava R, et al. Changes in medical errors after implementation of a handoff program. N Engl J Med. 2014;371(19):1803-1812. doi:10.1056/NEJMsa1405556
  9. Landrigan CP, Rothschild JM, Cronin JW, et al. Effect of reducing interns’ work hours on serious medical errors in intensive care units. N Engl J Med. 2004;351(18):1838-1848. doi:10.1056/NEJMoa041406
  10. Barger LK, Cade BE, Ayas NT, et al. Extended work shifts and the risk of motor vehicle crashes among interns. N Engl J Med. 2005;352(2):125-134. doi:10.1056/NEJMoa041401
  11. Edrees H, et al. Implementing the RISE second victim support programme at the Johns Hopkins Hospital: a case study. BMJ Open. 2016. PMID 27694486.
  12. Paluch AE, Bajpai S, Bassett DR, et al. Daily steps and all-cause mortality: a meta-analysis of 15 international cohorts. Lancet Public Health. 2022;7(3):e219-e228. doi:10.1016/S2468-2667(21)00302-9
  13. Drake C, Roehrs T, Shambroom J, Roth T. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. J Clin Sleep Med. 2013;9(11):1195-1200. doi:10.5664/jcsm.3170