Boyes technique of repairing deep branch of ulnar nerve. A, Main trunk and deep branch of ulnar nerve have been exposed, and volar carpal ligament has been divided. B, Ends of deep branch have been freshened. C, Deep branch has been split intraneurally into distal forearm. D, Deep branch has been rerouted through carpal tunnel, and its ends have been sutured. SEE TECHNIQUE 68.7.