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The START Triage Algorithm: Prioritizing Victims in Mass Casualty Incidents

A systematic approach to managing large numbers of injured individuals during disasters or accidents.

mysimulator teamUpdated June 2026≈ 3 min read▶ Open the simulation

What is the START Triage Algorithm?

The START (Simple Triage and Rapid Treatment) system is a rapid assessment tool used to prioritize patients during mass casualty incidents. It categorizes victims into four groups based on their immediate medical needs, allowing responders to allocate resources efficiently.

Developed in the 1980s for military use, the algorithm has since been adapted for civilian disaster response and emergency departments.

How Does the START Algorithm Work?

The START system evaluates victims based on three criteria: Airway (A), Respirations (R), Circulation (C), and Level of Consciousness (LOC). Each criterion is assessed with a simple yes or no answer, which determines the patient's priority level.

Patients are categorized as either Immediate, Expectant, or Transport. Immediate patients require immediate medical attention to prevent death; Expectant patients have minor injuries that can be treated later; and Transport patients need care but not immediately.

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Why Is the START Algorithm Important?

In situations where resources are limited, such as during natural disasters or terrorist attacks, the START algorithm ensures that those with the highest chance of survival receive prompt medical attention first.

By providing a standardized approach to triage, the algorithm helps reduce chaos and improves patient outcomes in mass casualty scenarios.

Real-World Applications

The START system has been used during various disasters, including earthquakes, hurricanes, and terrorist attacks. It has proven effective in saving lives by ensuring that critical care is directed to those who need it most.

Training programs for emergency responders often include the START algorithm as a core component of their curriculum, preparing them to handle large-scale emergencies.

Frequently asked questions

How does the START system differ from other triage systems?

The START system is simpler and quicker than many others, focusing on just three criteria: airway, breathing, and circulation. It also uses a binary yes/no assessment for each criterion.

Can the START algorithm be used in all types of emergencies?

While it was originally developed for military use, the START system has been adapted for civilian settings and can be applied to various emergency situations where rapid patient sorting is necessary.

Is the START triage algorithm universally accepted?

The START system is widely recognized and used in many countries. However, it may not always be the only or best approach depending on specific circumstances and local protocols.

How can someone learn to use the START algorithm effectively?

Training programs and simulations like the one provided by mysimulator.uk offer practical experience with the START system. Regular practice and understanding of its principles are key to effective implementation in real-world scenarios.

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