Wound Classification and Infection Risk3,9
| Wound Classification | Description | Risk of Surgical Site Infection, % |
|---|---|---|
| Clean | Uninfected operative wound with no inflammation Does not involve respiratory, alimentary, genital, or urinary tract | 1.76 |
| Clean-contaminated | Operative wound involving the respiratory, alimentary, genital, or urinary tract | 3.94 |
| Contaminated | Open, fresh, accidental wound Major breaks in sterile technique Gross spillage from the gastrointestinal tract Nonpurulent inflammation including necrotic tissue | 4.75 |
| Dirty/infected | Old, traumatic wounds with retained devitalized tissue Clinical infection or perforated viscera | 5.16 |