Table 1 Overview of the four category triage system METTS
Clinical parameter | Triage category | |||
|---|---|---|---|---|
1 (red) | 2 (orange) | 3 (yellow) | 4 (green) | |
Airway obstruction | ||||
Stridor | ||||
Oxygen saturation | SpO2 < 90% with oxygen supply | SpO2 < 90% without oxygen supply | SpO2 90% to 95% without oxygen supply | SpO2 > 95% without oxygen supply |
Respiratory rate (breaths/min) | >30 or <8 | >25 | 8 to 25 | |
Pulse (beats/min) | Regular >130 or irregular >150 | >120 or <40 | >110 or <50 | 50 to 110 |
Systolic bp (mmHg) | <90 | |||
Consciousness | Unconscious | RLS 2 to 3/somnolence | Disoriented | Alert |
Seizures | Temperature >41°C or <35°C | Temperature >38.5°C | Temperature 35°C to 38.5°C | |