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Trauma Models of Nakahara et al: Using Maximum AIS

Description

Nakahara reported 2 equations for predicting survival in a patient with trauma. One uses the maximum abbreviated injury scale (AIS). The authors are from St. Marianna University, University of Tsukuba, and National Center for Global Health and Medicine Hospital in Japan.


Patient selection: trauma patient

 

Parameters:

(1) age

(2) maximum AIS

(3) AVPU status

 

Parameter

Finding

Points

age

< 55 years

0

 

>= 55 years

1

maximum AIS

1

2

 

2

1

 

3 to 6

0

AVPU

A

3

 

V

2

 

P

1

 

U

0

 

X =

= (2.16 * (points for AIS)) + (1.73 * (points for AVPU)) - (0.79 * (points for age)) - 1.14

 

probability of survival =

= 1 / (1 + EXP((-1) * X))


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