By anatomical study in 40 cadaver legs, the blood of the medial leg flap is supplied by the saphenous artery, which is the cutaneous branch of descending genicular artery. Venous drainage of the flap is by the long saphenous vein. 通过40只尸体下肢解剖,观察到小腿内侧皮瓣由膝降动脉的皮支-隐动脉供血,经大隐静脉回流。