Azeredo et al evaluated weaning of an adult in the intensive care unit (ICU) from mechanical ventilation. They developed a simple predictive model. The authors are from multiple institutions in Brazil.
Patient selection: adult > 18 years old in the ICU on mechanical ventilation
Parameters:
(1) age of the patient in years
(2) integrative weaning index (IWI)
(3) APACHE II score
Parameter
Finding
Points if < 70 Years
Points if >= 70 Years
IWI
< 25
0
0
>= 25
6.0547
7.0727
APACHE II
<= 17
3.4249
0
> 17
0
0
X if < 70 years of age =
= SUM(points for the 2 parameter) - 3.1147
X if >= 70 years of age =
= (points for IWI) - 2.2687
probability of successful weaning =
= 1/(1+EXP((-1)*X))
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