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EM SAQsDisaster and mass casualty

EM SAQs · Disaster and mass casualty

Mass casualty bus crash — START triage, incident command and population ethics

ACEM-style SAQ on MCI triage (START/SALT), ICS, and greatest-good ethics.

15 marks15 min1 min readVerification in progress

Target exams

ACEMFRCEMABEM
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Study tools

Target exams

ACEMFRCEMABEM
Prompt
A multi-vehicle crash on the freeway generates a notification of approximately 30 casualties. You are the ED consultant when the first walking wounded arrive. Discuss your triage framework with named categories (5 marks), the incident command principles that govern the ED response (5 marks), and how the ethical standard of care shifts in a declared mass casualty incident (5 marks).

Model answer

Reveal model answerShowHide

Triage framework (5 marks). I activate the hospital disaster plan and establish perimeter triage. I use START (Simple Triage and Rapid Treatment) or preferably SALT (Sort, Assess, Lifesaving interventions, Treatment/Transport) as the national-style mass-casualty system. Categories are Immediate (red) — life-threatening but salvageable with rapid intervention; Delayed (yellow) — serious injuries that can wait hours; Minimal (green) — walking wounded; Expectant (grey/black) — unsurvivable given current resources. START decisions use respirations, perfusion (radial pulse/cap refill) and mental status in under 60 seconds per patient. I retriage continuously as resources change. I remember the first patients through the door are often the least injured; the critically injured arrive later by ambulance.[1][2]

Incident command (5 marks). I implement the Incident Command System. The Incident Commander coordinates and does not treat patients — a commander who treats loses the overview. Operations manages clinical streams; planning tracks capacity; logistics supplies; finance/admin tracks costs and documentation. I freeze elective work, open overflow, notify ICU/theatre/blood bank, and control media and family flows. If CBRNE is possible I lock down and decontaminate before ED entry.[3]

Ethical shift (5 marks). Care shifts from the individual best interest to the greatest good for the greatest number (population / crisis standards of care). Expectant categorisation is explicit, documented and reversible if resources improve. Resource-intensive interventions of marginal benefit are deferred so more salvageable lives can be saved. Communication with staff and public must be honest about the temporary standard.[3]

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References3ShowHide
  1. [1]Lerner EB, Schwartz RB, Coule PL, et al. Mass casualty triage: an evaluation of the data and development of a proposed national guideline. Disaster Med Public Health Prep, 2008.PMID 18769263
  2. [2]Lerner EB, Schwartz RB, Coule PL, et al. Use of SALT triage in a simulated mass-casualty incident. Prehosp Emerg Care, 2010.PMID 19947863
  3. [3]Sarin RR, et al. Core Disaster Medicine Education (CDME) for Emergency Medicine Residents in the United States. Prehosp Disaster Med, 2019.PMID 31455462
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