Gervaz et al developed a score for predicting surgical site infection after a colorectal resection. This can help to identify a patient who may benefit from more aggressive management. The authors are from Geneva University Hospital, Central Institute of the Valais Hospitals and Clinique de La Colline in Switzerland.
Patient selection: colorectal resection, ASA grades I to IV
Parameters:
(1) wound contamination class (C)
(2) obesity (O, BMO > 30 kg per square meter)
(3) type of laparotomy (L)
(4) ASA Grade (A)
Parameter
Finding
Points
wound contamination
Class I (clean) or Class II (clean contaminated)
0
Class III (contaminated) or Class IV (dirty, infected)
1
Obesity
absent
0
present
1
type of laparotomy
endoscopic
0
open surgery
1
ASA grade
Grade I or II
0
Grade III or IV
1
total score =
= SUM(points for all 4 parameters)
Interpretation:
• minimum score: 0
• maximum score: 4
• The higher the score the greater the risk for an SSI.
Total Score
Percent with SSI
Odds Ratio
0
5%
1
1
12%
2.4
2
19%
4
3
44%
14
4
68%
38
Performance:
• The area under the ROC curve was 0.73.
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