Russo and Spelman reported a simple index for predicting surgical site infection in patients undergoing coronary artery bypass graft surgery. The authors are from the Victorian Nosocomial Infection Surveillance System Coordinating Centre and Alfred Hospital in Victoria, Australia.
Patient selection: coronary artery bypass graft surgery (CABG)
Preoperative parameters:
(1) obesity
(2) peripheral or cerebrovascular disease
(3) insulin dependent diabetes mellitus
Parameter
Finding
Points
obesity
no
0
yes
1 (odds ratio 1.8)
peripheral or cerebro-vascular disease
no
0
yes
1 (odds ratio 1.6)
insulin-dependent DM
no
0
yes
1 (odds ratio 2.3)
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 3
• The risk of a surgical site infection increases as the score increases.
Score
Risk SSI
0
6.8%
1
11.8%
2
17.5%
3
40%
In addition, a procedure lasting > 5 hours was a risk factor with OR 1.8.
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