Assessing Leg Length Discrepancy Post-Total Hip Arthroplasty for Neck of Femur Fractures: A Retrospective Analysis.

Abstract

Background: Limb length discrepancy is a concern following total hip arthroplasty for hip pathologies. THA aims to alleviate pain and restore function, but LLD can impact satisfaction and outcomes. This study aimed to detect LLD following THA for neck of femur fractures and evaluate its effect on functional outcomes.

Material and methods: A retrospective study was conducted from 01/2019 to 12/2021, including NOF fracture patients eligible for THA based on mobility and clinical assessment. Data were obtained from patient records, postoperative notes, radiographs, and physiotherapy assessments.

Results: Fifty-eight patients underwent THA for NOF fractures, with an average age of 75.6 years (range 62-92). Most (96%) were ASA 2. The average time to surgery was 38.6 hours (range 8-266). No patients reported LLD postoperatively. Radiological measurements showed a vertical offset mean of 0.47 cm (range 3.46-7.1 mm) and a horizontal offset mean of 0.51 cm (range 3.34-6.89 mm) between operated and normal sides.

Conclusions: 1. Following total hip arthroplasty for neck of femur fractures, patients were able to achieve full weight-bearing and ambulation with clinically no significant leg length discrepancies or functional limitations. 2. Radiographic analysis showed moderate variations, but no functional impairment. 3. Surgical techniques and prosthetic selection minimized discrepancies. 4. Radiological and minor clinical discrepancies require further follow-up and research for identifying long-term effects on biomechanics.