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Injury Severity Score
The Injury Severity Score (ISS) is an established medical score to asses trauma severity. It correlates with mortality, morbidity and hospitalization time after trauma. It is used to define the term polytrauma.
Abbreviated Injury Scale AIS
The ISS is based (see below) upon the Abbreviated Injury Scale AIS. The AIS describes the severity of injury to one body region: 1 Minor, 2 Moderate, 3 Serious, 4 Severe, 5 Critical, 6 Maximal (currently untreatable).
ISS Definition
ISS = A^2 + B^2 + C^2; A, B, C being the AIS score of the three most injured of the following body regions: head, face, thorax, abdomen, extremities (incl. pelvis).
Polytrauma Definition
A Polytrauma is defined as ISS >= 16.
References
Baker SP et al, "The Injury Severity Score: a method for describing patients with multiple injuries and evaluating emergency care", J Trauma 14:187-196;1974
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Injury_Severity_Score". A list of authors is available in Wikipedia.
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