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