A mass casualty incident occurs at a local factory with multiple injured workers. The triage nurse is using the START (Simple Triage and Rapid Treatment) system to prioritize care. Which patient should receive the highest priority for immediate treatment?

In START triage, the patient with severe burns (40% BSA), respiratory distress (RR 28/min), and prolonged capillary refill (>2 sec) is categorized as immediate (red) due to high risk of shock and rapid deterioration. Other patients have lower priority: unconscious/apneic (black/expectant), compound fracture (yellow/delayed), or minor lacerations (green/minor).

Understanding the START Triage System
The START (Simple Triage and Rapid Treatment) system is designed to rapidly categorize patients in a mass casualty incident (MCI) based on the severity of their condition, prioritizing those who can benefit most from immediate, simple interventions. The goal is to do the greatest good for the greatest number of people. Triage training, including the use of START, is a critical competency for effective disaster response ^[2]. The system uses a standardized algorithm to assess three key parameters: Respirations, Perfusion, and Mental Status (RPM).

Analysis of Each Patient

Option 1: The 35-year-old worker with severe burns.
- Respirations: 28/min (above 30 is a criterion for immediate, but this rate is elevated yet below the threshold).
- Perfusion: Capillary refill >2 seconds (this is abnormal and indicates poor perfusion, which is a criterion for immediate).
- Mental Status: Conscious and alert (able to follow simple commands).
This patient has a significant injury (severe burns) and demonstrates a clear sign of shock with a delayed capillary refill. According to the START algorithm, any patient with a radial pulse that is absent or capillary refill that is greater than 2 seconds is tagged as IMMEDIATE (Red). This patient has a life-threatening condition (hypovolemic shock from burns) that can be temporarily stabilized with simple interventions like fluid resuscitation, making them the highest priority for immediate treatment.

Option 2: The 28-year-old worker who is unconscious and pulseless.
- Respirations: Not breathing spontaneously, even after a simple airway opening maneuver.
- Perfusion: No palpable pulse.
According to the START protocol, the first step is to assess respirations. If a patient is not breathing after a simple airway repositioning (head-tilt/chin-lift or jaw thrust), they are tagged as DECEASED/EXPECTANT (Black). In an MCI with limited resources, CPR is not initiated on patients in traumatic cardiac arrest because it is resource-intensive and has a very low probability of survival, diverting care from those with survivable injuries. This patient is therefore not the highest priority for immediate treatment.

Option 3: The 45-year-old worker with a compound femur fracture.
- Respirations: 20/min (within normal limits).
- Perfusion: Capillary refill is not mentioned, implying it is likely normal or the patient would have been assessed further. A compound fracture can cause significant bleeding, but the stable respiratory rate suggests no major hemodynamic compromise.
- Mental Status: Conscious.
This patient has a serious but non-life-threatening injury. With a normal respiratory rate, presumed adequate perfusion, and intact mental status, they would be categorized as DELAYED (Yellow). Their treatment can be deferred for a short period without significant risk of mortality.

Option 4: The 52-year-old worker with multiple lacerations.
- Respirations: Stable vital signs imply a normal rate.
- Perfusion: Stable vital signs imply normal perfusion.
- Mental Status: Ambulatory and complaining of pain.
The START system identifies "walking wounded" as patients who are ambulatory on command. These patients are typically tagged as MINOR (Green). They have minor injuries that do not require immediate or delayed life-saving intervention and can wait for treatment.

Why Option 1 is the Correct Priority
The core principle of MCI triage, reinforced by the need for standardized and effective training , is to prioritize patients with life-threatening conditions that are reversible with immediate, basic care. The patient in Option 1 is in shock, as evidenced by the delayed capillary refill. This is a condition that can be rapidly addressed with hemorrhage control and fluid administration. In contrast, the patient in Option 2 has a non-survivable injury in this context (traumatic arrest), and the patients in Options 3 and 4 have non-life-threatening conditions. The START algorithm systematically identifies the patient with severe burns and poor perfusion as the one requiring the most urgent intervention to prevent death.