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This application is able to calculate Trauma Injury Severity Score (TRISS)easily.
Trauma Severity Score is configured by RTS and ISS ,Ps each score.
Though they are useful, their calculations are very complex.

TRISS determines the probability of survival (Ps) of a patient from the ISS and RTS.

Ps(probability of survival)
RTS(revised trauma score)
ISS(injury severity score)

Boyd CR, Tolson MA, Copes WS: "Evaluating Trauma Care: The TRISS Method", J Trauma 27:370-378;1987