What Is Triage and How Does It Work?

Triage is the systematic process of rapidly sorting patients by the urgency of their medical needs — determining who requires immediate intervention, who can safely wait, and allocating limited medical resources where they will do the most good. The word comes from the French "trier" (to sort), and the concept was formalized by Napoleon's surgeon general Dominique Jean Larrey in the early 19th century as a means of providing battlefield care. Today, triage operates in emergency rooms, mass casualty incidents, disaster medicine, and — at a larger scale — public health resource allocation.

The Purpose Of Triage

In an ideal world with unlimited medical staff and resources, all patients would be seen immediately regardless of severity. In reality, emergency departments treat patients simultaneously with needs ranging from a mild ankle sprain to a cardiac arrest. Without systematic prioritization, a waiting room managed by arrival order would have life-threatening emergencies die while waiting behind minor complaints.

Triage solves this by identifying who needs intervention now vs. who can safely wait while resources are directed toward the most urgent cases. The goal is not to give the best care to everyone simultaneously — it's to save the most lives and prevent the most serious harm with available resources.