(ESI) -Emergency Severity Index Web Site

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Emergency Severity
Index, Version 4:
Implementation
Handbook

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ESI Training Module

Training module for emergency departments

Recent Publications

Emergency Severity Index, Version 4:
Implementation Handbook.

The Emergency Severity Index (ESI) is a five-level tool for use in emergency department (ED) triage. Experienced ED nurses use the ESI to rate patient acuity, from level 1 (most urgent) to level 5 (least resource intensive). The ESI is unique among triage tools, by including both acuity and resource needs in the system of categorizing ED patients.

The ESI is a powerful tool for enhancing patient safety at triage as well as providing casemix data to support emergency department operational decisions, quality initiatives and clinical research.