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Antegrade nailing (piriformis)

Generally, draping should always be applied up to the pelvic rim, to find the correct individual location for the skin incision.

Care should be taken to make the skin incision in line with the curved axis (dashed line) of the femoral canal to minimize the risk of injury to the superior gluteal nerve.

Another reason to make the skin incision in line with the bow of the femur is to minimize the risk of eccentric reaming of the proximal fragment, leading to the risk of perforation of the posterior femoral shaft cortex.