Divide the vastus lateralis and vastus intermedius muscles in the direction of their fibers and open and reflect the per按纤维方向劈开股外侧肌和股中间肌；切开适当长度的骨膜并向两侧牵开。
Fig. 1-57 Anterolateral approach to femur. A, Skin incision. B, Femur exposed by separation of rectus femoris and vastus图1-57股骨前外侧手术入路。A皮肤切口；B分开股直肌和股外侧肌，劈开股中间肌，显露股骨。