Table 3 Classification of potential surgical contamination

Clean (no viscus opened)

Adhesiolysis

1-2

Clean-contaminated (viscus opened, minimal spillage)

Right Hemicolectomy,

Open Cholecystectomy

< 10

Contaminated (open viscus with spillage or inflammatory disease)

Colectomy with some spillage

Resection of active Crohns disease

15-20

Dirty (pus or perforation, or incision through an abscess)

Diverticular perforation

< 40