Immobilization Versus Immediate Motion After Anterior Submuscular Ulnar Nerve Transposition

The goal of this study is to test the hypothesis that immediate elbow motion is safe after
anterior submuscular ulnar nerve transposition, and will not result in disruption of the
repaired flexor pronator origin, under which the nerve is placed. The advantages of
immediate elbow motion after submuscular ulnar nerve transposition for performing activities
of daily living and self-care are evident, however theoretical advantages include early
"gliding" of the transposed ulnar nerve with a lower risk of nerve adhesions and subsequent
traction neuritis, as well as improved blood flow and quicker, more complete, recovery of
nerve function.

A group of 44 consecutive patients that are determined to be candidates for anterior
submuscular ulnar nerve transposition based on history, positive findings on physical
examination, and confirmatory electrodiagnostic testing will be prospectively randomized to
either immediate motion or long arm cast immobilization after surgery. All patients will be
counseled about the two postoperative treatment options (immobilization followed by
protected range of motion versus immediate range of motion), risks involved with each
treatment protocol, postoperative follow-up and need for radiographs. If they choose not to
participate, they will be treated by the same postoperative protocol currently used by the
principal investigator: arm sling at rest for six weeks with intermittent active assisted
range of motion exercises.