The infra-isthmal fracture of the shaft of the femur.

The common infra-isthmal fracture of the shaft of the femur is defined. The difficulties in its management are discussed and various methods of treatment are critically reviewed. The operative treatment of 21 such fractures with a single plate by the AO method is described. Strict adherence to every detail of the operative and postoperative technique and a cooperative patient are essential for a successful result.