Subtrochanteric fractures of the femur can be treated by all of the following methods except
Smith Peterson Nail is a cannulated tri-flanged nail that was used for internal fixation of fracture neck of femur Results obtained by S-P nail were dissatisfactory and it is no more recommended for use these days.
Other three options are used for the treatment of the subtrochanteric fracture.
Skeletal traction on Thomas' splint
Smith Petersen Nail
Condylar blade plate
Ender's nail