Transfer of flexor carpi ulnaris. A, Anterior longitudinal incision over flexor carpi ulnaris. This may be divided into two separate incisions as described in the text. B, Flexor carpi ulnaris tendon is detached from pisiform insertion, and muscle is dissected proximally off ulna. C, Small longitudinal incision on dorsum of wrist over extensor carpi radialis brevis just proximal to first extensor compartment. D, Flexor carpi ulnaris tendon is passed subcutaneously around ulnar border of forearm using a tendon passer. E, Buttonhole is made in extensor carpi radialis brevis tendon. F, Flexor carpi ulnaris is passed through buttonhole and sutured to itself under appropriate tension. SEE TECHNIQUE 72.6.