In a mass-casualty incident, every patient is sorted in under a minute. Step through the START algorithm and see how respirations, perfusion, and mental status decide the category.
START TriageLive
mass-casualty triage algorithm
Triage category
YELLOW
Delayed
Controls
Can the patient walk?
Is the patient breathing?
Presets
Respirations / min
24 /min
Perfusion (radial pulse / cap refill <2s)
Mental status (obeys commands)
Simple Triage And Rapid Treatment sorts mass-casualty patients in under 60 seconds each using RPM: Respirations, Perfusion, Mental status. Training reference only — follow your agency protocol and medical direction.
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How it works
Simple Triage And Rapid Treatment (START) is the most widely taught mass-casualty triage method in the US. It walks through ability to walk, breathing, respiratory rate, perfusion, and mental status to assign Green, Yellow, Red, or Black. This is a training reference — always follow your agency protocol and medical direction on scene.
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Ask the AI about this model
The math, the assumptions, real-world uses, or a code translation — explained for this exact simulation.
Is this START triage calculator tool really free?▾
Yes. START Triage runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?▾
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.