Abbreviated Injury Scale
The Abbreviated Injury Scale (AIS) is an anatomically-based, consensus-derived, global severity scoring system that classifies each injury by body region according to its relative importance on a 6 point ordinal scale. AIS is the basis for the Injury Severity Score (ISS) calculation of the multiply injured patient.
The AIS classifies individual injuries by body region as follows:
- AIS 1 – Minor
- AIS 2 – Moderate
- AIS 3 – Serious
- AIS 4 – Severe
- AIS 5 – Critical
- AIS 6 – Maximal (currently untreatable)
The AIS version currently used in New South Wales is the AIS 2005 - Update 2008 version. Information about updates and changes to the AIS versions are available at the Association for Advancement of Automotive Medicine (AAAM) - AIS update information page.