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Related Experiment Video

Updated: Mar 23, 2026

A Probing Device for Quantitatively Measuring the Mechanical Properties of Soft Tissues during Arthroscopy
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A Toroidal Probe for Measuring Surgically Exposed Joint Centers.

Brian J Rasquinha1, Kate S M Loe1, Andrew W L Dickinson2

  • 1Dept. of Mechanical & Materials Engineering, Queen's University, Kingston, ON, CA.

Studies in Health Technology and Informatics
|April 6, 2016
PubMed
Summary
This summary is machine-generated.

A new probe accurately measures hip joint centers for total hip arthroplasty. This technology may improve implant placement and surgical outcomes.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Medical Device Technology

Background:

  • Accurate hip center reconstruction is crucial for successful total hip arthroplasty (THA).
  • Conventional THA can lead to significant leg length and offset discrepancies.
  • Existing methods for determining hip center may lack the required precision.

Purpose of the Study:

  • To introduce and evaluate a novel probe design for kinematic measurement of the femoral head and implant centers.
  • To assess the accuracy of this device in a pre-clinical setting for potential THA applications.

Main Methods:

  • A novel probe, integrating toroid and sphere components, was developed for kinematic measurements.
  • The device was implemented using electromagnetic tracking in a laboratory setting.
  • Technical validation involved measuring a spherical center; further testing used a cadaveric femur model.

Main Results:

  • The device achieved a technical accuracy of 1.2±0.2 mm for measuring a spherical center.
  • In a cadaveric femur model, the femoral head center was measured to 1.8±0.4 mm.
  • The implant center was localized to within 1.5±0.5 mm in the cadaveric model.

Conclusions:

  • The novel probe demonstrates high accuracy in measuring hip joint centers.
  • This technology has the potential to improve implant localization in total hip arthroplasty.
  • Enhanced accuracy may reduce leg length and offset discrepancies, improving THA outcomes.