Which Gustilo-Anderson fracture type is defined primarily by the presence of vascular injury requiring repair, regardless of the degree of soft tissue damage?

Explanation

## Gustilo-Anderson Classification: Type IIIC Definition **Key Point:** Type IIIC is the ONLY grade defined by **vascular injury requiring repair**, not by soft tissue damage severity. An arterial injury automatically classifies the fracture as Type IIIC, regardless of whether soft tissue coverage is adequate. ### Vascular Injury Criterion - **Arterial injury** requiring surgical repair or reconstruction - May occur with minimal soft tissue damage (Type IIIA-level tissue injury) - May occur with extensive soft tissue damage (Type IIIB-level tissue injury) - The vascular component **overrides** soft tissue classification ### Clinical Significance of Type IIIC 1. **Highest amputation risk** among all open fractures 2. Requires **urgent vascular surgery consultation** 3. Time to vascular repair is critical (6–8 hour "golden period") 4. Outcome depends on limb perfusion and revascularization success **High-Yield:** Remember: **IIIC = vascular injury**. The "C" stands for "Circulation." If there is an arterial injury, it is Type IIIC by definition, even if soft tissue coverage is intact. **Mnemonic:** **IIIC = vascular Injury** — The vascular component is the defining feature, not tissue loss. **Clinical Pearl:** A Type IIIA fracture (adequate soft tissue coverage) becomes Type IIIC if an artery is injured and requires repair. Conversely, extensive soft tissue loss without vascular injury remains Type IIIB. ### Comparison Table | Type | Soft Tissue | Vascular Injury | Defining Feature | |------|-------------|-----------------|------------------| | II | Moderate | No | Wound < 1 cm, no flap needed | | IIIA | Adequate coverage | No | High-energy, no flap needed | | IIIB | Inadequate, flap needed | No | Extensive tissue loss | | IIIC | Any | **Yes** | **Arterial injury** |