A simple method to minimize leg length discrepancy in hip hemiarthroplasty

Area of Science:

• Orthopedic Surgery
• Biomechanical Engineering
• Medical Imaging

Background:

• Leg length discrepancy (LLD) is a common complication following hip arthroplasty.
• Accurate limb length restoration is crucial for patient outcomes and function.

Purpose of the Study:

• To introduce and evaluate a novel, simple method for minimizing LLD during hip arthroplasty.
• To assess the accuracy of this preoperative planning technique.

Main Methods:

• A cohort of 47 patients with femoral neck fractures undergoing hip hemiarthroplasty were studied.
• A ratio (R) derived from contralateral hip X-ray measurements (femoral head diameter D, distance L) was calculated.
• Intraoperative measurements and the calculated ratio R were used to determine the appropriate prosthesis size and positioning to minimize LLD.

Main Results:

• The mean postoperative LLD was 4.4±3.2 mm.
• 80.9% of patients achieved an LLD <6 mm.
• 93.6% of patients had an LLD <10 mm, with only 6.4% experiencing LLD ≥10 mm.

Conclusions:

• The developed method is a simple, cost-effective, and rapid approach to reduce LLD.
• This technique demonstrates high accuracy in achieving limb length equalization after hip arthroplasty.
• The method offers a practical solution for improving surgical outcomes in hip replacement procedures.