Related Experiment Video
Updated: Jul 7, 2026
04:41
Treatment with Locking Intramedullary Nailing for Intertrochanteric Fracture of the Femur Utilizing a New Awl with a Distal Positioner
Published on: June 6, 2025
Reliable angle assessment during periacetabular osteotomy with a novel device
Anders Troelsen1, Brian Elmengaard, Lone Rømer
1Orthopaedic Research Unit, University Hospital of Aarhus, Tage-Hansens Gade 2, Building 7B, DK-8000, Aarhus C, Denmark. a_troelsen@hotmail.com
Clinical Orthopaedics and Related Research
|February 12, 2008
Summary
A new device reliably measures acetabular angles during periacetabular osteotomy. This tool simplifies acetabular reorientation, potentially eliminating the need for intraoperative radiographs.
Area of Science:
- Orthopedic surgery
- Medical device development
- Surgical navigation
Background:
- Periacetabular osteotomy (PAO) requires precise acetabular reorientation.
- Accurate intraoperative assessment of acetabular index and center edge angle is crucial for successful PAO outcomes.
- Current methods may involve intraoperative radiographs, adding time and radiation exposure.
Purpose of the Study:
- To develop and evaluate a novel measuring device for intraoperative assessment of acetabular angles during PAO.
- To determine the reliability and accuracy of the device compared to radiographic measurements.
- To assess the impact of pelvic positioning on measurement variability.
Main Methods:
- Development of a bilateral pelvic-mounted measuring device with adjustable discs.
- Cadaver study to assess intraobserver and interobserver variability.
- Fluoroscopic guidance for intraoperative angle measurements.
- Comparison of intraoperative measurements with postoperative radiographs in 35 patients.
Main Results:
- Intraoperative measurements closely matched postoperative radiographic measurements (within +/- 5 degrees).
- The device demonstrated low intraobserver and interobserver variability (within +/- 5 degrees).
- Pelvic positioning variations (within +/- 12.5 degrees) did not significantly increase measurement variability beyond the device's inherent limits.
Conclusions:
- The developed device offers a simple and reliable method for intraoperative acetabular angle assessment during PAO.
- It facilitates accurate, repeated measurements, potentially obviating the need for intraoperative radiographs.
- This tool may enhance surgical precision and efficiency in acetabular reorientation procedures.
