# A Nerve Injury After Total Hip Arthroplasty from Etiology to Treatment: A Narrative Review

## TL;DR

This review discusses nerve injuries after hip replacement surgery, covering causes, risk factors, symptoms, and treatment options to improve patient outcomes.

## Contribution

The paper provides a comprehensive narrative review of nerve injury mechanisms and management in total hip arthroplasty.

## Key findings

- Nerve injuries after THA affect sciatic, femoral, and other nerves, with incidence ranging from 0.6% to 3.7%.
- Risk factors include anatomical abnormalities, obesity, and surgical complexity, while prevention relies on careful planning and technique.
- Most injuries resolve with conservative treatment, but severe cases may require surgical interventions or pharmacological support.

## Abstract

Total hip arthroplasty (THA) is a widely performed procedure that significantly enhances patients’ quality of life. However, nerve injury remains a concerning complication, with an incidence ranging from 0.6% to 3.7%, depending on patient and surgical variables. This narrative review provides a comprehensive overview of nerve injuries associated with THA, focusing on etiology, risk factors, clinical manifestations, prevention, and treatment strategies. The most affected nerves include the sciatic, femoral, lateral femoral cutaneous (LFCN), superior gluteal, and obturator nerves. Anatomical factors such as developmental hip dysplasia (DDH), limb length discrepancy, and aberrant nerve courses, along with patient-specific conditions like female sex, obesity, and pre-existing spinal disorders, increase the risk of nerve damage. Surgical complexity, revision procedures, and surgeon experience also influence injury likelihood. Clinical manifestations range from sensory disturbances to motor deficits including foot drop, Trendelenburg gait, or impaired knee extension, depending on the nerve involved. Diagnosis is primarily clinical, supported by electrophysiological studies and imaging when needed. Prevention hinges on careful preoperative planning, appropriate surgical approach selection, meticulous intraoperative technique, and attention to limb positioning. Treatment is typically conservative, involving pain control, physical therapy, and neurostimulation. In refractory or severe cases, interventions such as nerve decompression, repair, or tendon transfer may be considered. Pharmacological agents including vitamin B12, tacrolimus, and melatonin show potential in promoting nerve regeneration. Although most nerve injuries resolve spontaneously or with conservative measures, some cases may result in long-term deficits. Understanding the mechanisms, risk factors, and management strategies is essential to mitigating complications and optimizing functional outcomes in patients undergoing THA.