Gustilo-Anderson fracture type | Definition | Historical infection rates (percentage) |
I | Wound <1 cm; minimal contamination, comminution and soft-tissue damage | 0 to 2 |
II | Wound >1 cm; moderate soft-tissue damage, minimal periosteal stripping | 2 to 5 |
IIIa | Severe soft-tissue damage and substantial contamination; coverage adequate | 5 to 10 |
IIIb | Severe soft-tissue damage and substantial contamination; coverage inadequate | 10 to 50 |
IIIc | Arterial injury requiring repair | 25 to 50 |