Novel method for ensuring leg length in total hip arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Leg-length discrepancy is a common complication after total hip arthroplasty (THA).
• Existing intraoperative measurement techniques are often invasive or lack accuracy.

Purpose of the Study:

• To introduce a novel, noninvasive intraoperative method for accurate limb length measurement during THA.
• To evaluate the efficacy of this technique in preventing postoperative leg-length discrepancy.

Main Methods:

• A modified trial head with a guide plate slot was used.
• Measurements were taken intraoperatively and compared to preoperative plans.
• The technique involves aligning a guide plate perpendicular to the femoral axis.

Main Results:

• A retrospective analysis of 31 THA cases was performed.
• The mean postoperative leg-length discrepancy was 2.18±6.08 mm.
• The technique demonstrated accurate limb length restoration.

Conclusions:

• This noninvasive method provides accurate intraoperative limb length measurement.
• It is a valuable addition to the surgeon's toolkit for THA.
• The technique helps minimize postoperative leg-length discrepancies.