Messent et al reported factors associated with development of ARDS (adult respiratory distress syndrome) following cardiopulmonary bypass surgery. The authors are from National Heart and Lung Institute and Royal Brompton and National Heart Hospital in London.
Patient selection: cardiopulmonary bypass surgery
Predictor for ARDS from case-controlled analysis:
(1) intra-operative intervention score (see below)
Parameter
Finding
Points
additional period on cardiopulmonary bypass
no
0
yes
1
use of intra-aortic balloon counterpulsation device
no
0
yes
1
use of a ventricular assist device
no
0
yes
1
renal dialysis within 24 hours of bypass
no
0
yes
1
intra-operative intervention score =
= SUM(points for all 4 parameters)
Interpretation:
• minimum score: 0
• maximum score: 4
• The parameters reflect organ failures.
Additional factors associated with ARDS:
(1) age of patient > 60 years
(2) total pumped volume > 300 liters (also a measure of duration on pump)
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