A new type of intramedullary nail for the internal fixation of subtrochanteric fractures of the femur.

The Author has developed a modified intramedullary nail for the stabilisation of fractures in the subtrochanteric and proximal one-third of the femur. Due to its three tapered fins the rod fits well into the funnel-like medullary cavity of the proximal femur preventing varus or rotational displacement of the proximal fragment. This method has been applied in 16 cases. Its particular advantages are the chance to perform the operation closed, a short operating time and period in hospital, early weight bearing and a simple surgical technique without the need for special instrumentation, requiring little radiographic exposure during surgery. The ideal and relative indications for the application of the technique are discussed. Biomechanical tests have confirmed that the finned medullary nail is the most stable method of fixation of the fractures when compared with other alternative devices.