AI Article Synopsis
- Nerve palsy following total hip arthroplasty (THA) can significantly affect patients, and this study focuses on femoral nerve palsy (FNP) related to the modified Watson-Jones surgical approach.
- The research aimed to identify risk factors for FNP, particularly the relationship between short stature and a shorter distance from the femoral nerve to the anterior acetabular edge (dFN).
- Conducted at a university hospital from 2016 to 2020, the study analyzed data from 676 THA procedures, assessing various patient factors to understand the incidence and possible causes of FNP post-surgery.
Article Abstract
Background: Nerve palsy following total hip arthroplasty (THA) critically impacts patient clinical function. However, few studies have focused on femoral nerve palsy (FNP) following THA via the modified Watson-Jones approach. Previous reports have suggested that THA, regardless of the approach, is associated with several FNP risk factors, including female gender, hip dysplasia, revision surgery, and short stature. Magnetic resonance imaging (MRI) has suggested that a shorter distance between the femoral nerve and the anterior acetabular edge (dFN) is related to FNP after THA. The purposes of this study were: 1) to determine the presumed risk factors through a retrospective investigation of FNP clinical courses, and 2) to identify the relationships between FNP occurrence and the short dFN following primary THA via the modified Watson-Jones approach.
Hypothesis: Short stature is a risk factor for femoral nerve palsy following THA. i.e. a significant difference in dFN exists between patients with and without FNP.
Patients And Methods: This retrospective case-control study was performed at a single university hospital. From January 2016 to December 2020, 676 THAs were performed via the modified Watson-Jones approach at our institution. These included 495 THAs performed in the supine position and 181 in the lateral position. In this study, FNP was defined as weakness of the quadriceps femoris (manual muscle test
Results: FNP occurred in 6 out of 676 joints (0.88%) following primary THA via the modified Watson-Jones approach. In all 6 cases, the motor deficit recovered completely within a year. Patient height was significantly shorter in the FNP group than in the non-FNP control group (148.4±3.3cm vs. 155.4±8.1cm [p=0.01]). The dFN was significantly shorter in the FNP group (16.3±4.1mm vs. 21.5±4.0mm [p=0.034]).
Conclusion: Short stature and short dFN are risk factors for FNP after THA using the modified Watson-Jones approach.
Level Of Evidence: III, case-control study.
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| http://dx.doi.org/10.1016/j.otsr.2022.103351 | DOI Listing |
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