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Triage and Evacuation Precedence

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TCCC decision-making becomes most explicit when the number of casualties exceeds the available hands, time, or evacuation capacity.

Two related but distinct questions appear:

  1. Triage: who gets treated first (and at what level of intensity)?
  2. Evacuation precedence: who gets moved first when transport is limited?

These can align, but they do not have to. A casualty may be medically urgent but logistically impossible to move; another may be movable and time-sensitive.

Triage categories (conceptual)

Many military and disaster frameworks use four broad triage categories:

  • Immediate - needs rapid life-saving intervention.
  • Delayed - needs care, but can tolerate some delay.
  • Minimal - minor injuries; often ambulatory.
  • Expectant - injuries so severe that, given current resources, survival is unlikely.

The “expectant” category is the part most people want to avoid naming. In mass casualty or under sustained threat, the category still exists implicitly; TCCC makes it explicit so teams can plan ethically rather than improvising in denial.

Evacuation precedence categories

Evacuation precedence is a resource allocation framework for transport capacity. Common categories include:

  • Urgent - as soon as possible.
  • Priority - as soon as possible within practical limits.
  • Routine - can wait.
  • Urgent surgical - requires urgent surgical intervention.

These labels are not moral judgments. They are coordination primitives: they help multiple teams synchronize expectations across an evacuation chain.

Communication as a scarce resource

Evacuation is a coordination problem. Standardized message formats exist so that the minimum necessary information survives stress.

Two common components are:

  • A request format for evacuation (often the 9-line request).
  • A patient report format for clinical handoff (often MIST: mechanism, injuries, signs/symptoms, treatments).

See: Documentation and Handoff.

Practical resource allocation

Resource allocation is not only about evacuation seats. It is also about:

  • Hands (who can treat, who must hold security, who can carry)
  • Time (when you can stop, reassess, and treat versus when you must move)
  • Consumables (what you can afford to use now while preserving capability for additional casualties)
  • Packaging (litter availability, hypothermia prevention, and access for monitoring during movement)

In systems terms: TCCC tries to keep the unit from spending its entire medical budget on a single event.

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