he simultaneous occurrence of an acetabulum fracture with an ipsilateral centrally dislocated proximal femur fracture is a rare injury. 1-4 These combined injuries can be quite difficult to treat. 1,2,5 We present a patient with an unusual fracture in which the proximal femur was fractured and irreducibly dislocated through a central acetabular fracture into the pelvis. This case contains several important learning experiences regarding timing and preoperative planning in complex injury patterns.
CASE REPORTA 31-year-old man was involved in a motorcycle crash in which he struck a utility pole. The patient had respiratory compromise at the scene. When attempts at intubation failed, cricothyroidotomy was performed in the field. Physical examination upon presentation to our trauma center showed his left leg to be shortened and malrotated. The overlying skin was intact. Radiographic examination (Fig. 1) revealed a complex left acetabulum fracture, later classified as a bothcolumn injury, as well as a proximal femur fracture with intrapelvic displacement of the femoral head, neck, and lesser trochanter. Admitting Glasgow Coma Scale score measured 3T (intubated), and computed tomography (CT) examination of the patient's head revealed a significant intraparenchymal hemorrhage. Additional scans were not completed because of the patient's airway instability. He was emergently taken to the operating room by the surgery trauma service for a tracheostomy to secure the airway. The orthopedic on-call team simultaneously attempted management of his complex acetabular fracture-dislocation, with the intention of reducing the proximal femur from the pelvis to the acetabulum and deferring further treatment to the orthopedic traumatologist.The patient was placed supine on a fracture table in boot traction. A lateral approach to the proximal femur was performed. The dissection was continued down to the level of the proximal femur fragment. Multiple attempts were made to extract the dislocated femoral head from the pelvis through the central acetabular defect. Retractors, bone clamps, and traction through the lag screw of a sliding hip-screw system were all used unsuccessfully. The lateral window of the ilioinguinal approach was then performed. Dissection was carried down along the internal iliac fossa, elevating the iliacus, with the intention of freeing and pushing the femoral head out from within the pelvis. The surface of the femoral head was visualized, and the articular cartilage was intact. Unfortunately, the margins of the acetabular fracture remained immobile, and the femoral head was irreducible.Because of prolonged operative time (4 hours) and excessive ongoing blood loss of 1, 200 mL in a patient with significant closed head trauma, the decision was made to leave the hip dislocated. The wounds were closed, and the patient was returned to the intensive care unit for further resuscitation and rewarming. The next morning, the orthopedic service traumatologist assumed care of the patient's musculoskeletal injuries. During this...