The NHS Prehospital Major Incident Triage Tool (MITT) can be used to triage patient in a mass casualty event.
Patient selection: mass casualty event
Criteria for death - either of the following:
(1) not breathing and open airway
(2) if the patient is < 12 years and submersion, immersion, or smoke inhalation, then not breathing after rescue breaths
Criteria for Level 1 - either of the following:
(1) catastrophic bleeding (attempt control of bleeding)
(2) not walking AND any of the following:
(2a) does not respond to voice
(2b) age <= 2 years
(2c) breathing rate < 12 or > 23 breaths per minute
(2d) heart rate >= 100 beats per minute
Criteria for Level 2 (yellow):
(1) not walking and heart rate < 100 beats per minute
Criteria for Level 3 (green):
(1) walking (and not with catastrophic bleeding)
where:
• Bradycardia is not scored.
• If the patient is not walking and does not meet any of the criteria, then designated level 2.
