A Case of Dislocation of the Ulna Backwards and the Radius Forwards

He found his left elbow dislocated, and the forearm was in a semi-flexed position. He asked a gentleman to pull the arm "straight," as he thought that was the best position for the arm to be in. The gentleman did so, and F. J. D. felt "something" give way in the joint, and a bone appeared to slip forward. On admission, the left arm was almost straight, the elbow much swollen, and he could move it only very slightly. The prominences of the external and internal condyles of the humerus had disappeared; the olecranon process of the ulna was not in a line with the condyles, but about one and a half inch above them posteriorly. On the patient extending his forearm to the full, a sulcus