Dislocation of the median nerve and brachial artery in supracondylar fractures of the humerus.

Two patients are described in whom the median nerve was dislocated and incarcerated between the fragments of a supracondylar fracture of the humerus. In one, the brachial artery was similarly incarcerated and was in spasm. In the second, the brachial artery had been ruptured by the upper fragment. Circulation was restored by operation in both instances. The mechanism of dislocation is discussed.