Carson et al developed the Prognosis for Prolonged Ventilation (ProVent) score to predict prognosis for patients requiring prolonged mechanical ventilation. This can help to identify a patient who may require more aggressive management. The authors are from the University of North Carolina at Chapel Hill, Duke University and East Carolina School of Medicine.
Data of evaluation: day 21 of mechanical ventilation
Parameter:
(1) age of the patient in years
(2) need for vasopressor agents
(3) need for hemodialysis
(4) platelet count
Parameter
Finding
Points
age of the patient in years
< 50 years of age
0
>= 50 years of age
1
need for vasopressor agents
no
0
yes
1
need for hemodialysis
no
0
yes
1
platelet count
> 150,000 per µL
0
<= 150,000 per µL
1
total ProVent score =
= SUM(points for all 4 parameters)
Interpretation:
• minimum score: 0
• maximum score: 4
• The prognosis becomes worse as the number of risk factors increase.
ProVent Score
Risk Group
1 Year Mortality Rate
0
low
7 to 15%
1
intermediate
29 to 42%
2
high
77 to 88%
3 or 4
very high
85 to 100%
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