A Case Report of a Radial Nerve Palsy Following Uncomplicated Total Hip Arthroplasty.

Introduction: Nerve injury is a known complication of total hip arthroplasty (THA), but it is most commonly seen in the lower extremities. There is, however, minimal discussion about the incidence of upper extremity nerve palsies, specific to the radial nerve, during THA for a patient in the lateral decubitus position. The radial nerve can be injured while in the lateral decubitus position due to poor positioning of the posterior part of the humerus onto the hard surgical table causing compression of the nerve. In THA, this is significant due to the lateral decubitus position being the primary position for the patient in posterior and lateral approaches. We report a case of radial nerve palsy following uncomplicated THA in the lateral decubitus position.

Case Report: A 49-year-old male presenting with symptoms of the left radial nerve palsy on post-operative day number one from a right (contralateral) THA. The patient has a body mass index of 22.15 and was undergoing a right THA with a posterior approach. He was placed in the lateral decubitus position with an axillary roll in place for approximately 2 h and 45 min. Occupational therapy, orthopedics, and electromyography were used to evaluate the patient in the post-operative time for his radial nerve palsy.

Conclusion: Our case report demonstrates a rare nerve palsy complication that can be associated with positioning in THA surgeries. Knowledge of this complication can be used to avoid pressure points in future THA surgeries in the lateral decubitus position.