TRISS determines the probability of survival
(Ps) of a patient from the ISS and RTS using the following formulae:
Where 'b' is calculated from:
The coefficients b0 - b3 are derived from multiple regression analysis
of the Major Trauma Outcome Study (MTOS) database. AgeIndex is 0 if
the patient is below 54 years of age or 1 if 55 years and over. b0
to b3 are coefficients which are different for blunt and penetrating
trauma. If the patient is less than 15, the blunt coefficients are
used regardless of mechanism.
The TRISS calculator determines the probability of survival from
the ISS, RTS and patient's age. ISS and RTS scores can be inputted
independently or calculated from their base parameters.
The will sit as a standalone window on your desktop.