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University of Texas Health Science Center San Antonio classification system
| 0 | 1 | 2 | 3 | |
|---|---|---|---|---|
| A | No open lesion | Superficial Wound | Tendon/Capsule | Bone/Joint |
| B | With infection | With infection | With infection | With infection |
| C | Ischemic | Ischemic | Ischemic | Ischemic |
| D | Infection/Ischemia | Infection/Ischemia | Infection/Ischemia | Infection/Ischemia |
Source: Adapted from (45).
