ASIS Avulsion Fracture Repair with Lag Screw and Tape Bridge Construct

An anterior superior iliac spine avulsion (ASIS) is an injury that is induced by a rapid contraction of the sartorius and tensor fascia lata (TFL) muscles in the thigh. In this technique article, the ASIS is repaired by restoring normal length and tension to the sartorius muscle-tendon unit, which optimizes anatomic healing and function of the hip. We recommend a hybrid fixation strategy. This involved both a tape bridge construct and cannulated compression lag screw fixation. Countersinking the screw below the surface of the ASIS avoids hardware prominence and ensures an impingement-free range of motion. The tape-bridge construct reinforces the lag screw fixation, or can be used as the primary fixation method in the event the fragment is too small to accept a screw. This hybrid technique (tape bridge construct and cannulated screw fixation) is a safe and dependable method of surgically repairing the ASIS, allowing for early mobilization and weight bearing.