Opening of the femur
Insert the protection sleeve with its trocar over the guide wire and push it through the soft tissues until it abuts against the greater trochanter. Then withdraw the trocar and insert an appropriate drill bit over the guide wire. Ream out the trochanteric area. Ream by hand in the elderly to avoid damage to the fragile trochanteric shell. In young patients, use power. Remove the guide wire after reaming.
Only in exceptional cases, where the medullary canal is smaller than the chosen nail, it will be necessary to overream the femoral shaft so that its diameter is 1 mm greater than that of the chosen nail.