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Traction force for peroperative hip dislocation in hip arthroscopy.

Maarten A Röling1, Nina Mc Mathijssen1, Ian Blom1

  • 1Department of Orthopaedic Surgery, Reinier de Graaf Hospital, Delft, The Netherlands.

Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
|April 10, 2019
PubMed
Summary

Hip arthroscopy traction force significantly decreases after vacuum seal release and capsulotomy. This reduction in traction force does not impact joint space widening, crucial for hip procedures.

Keywords:
Arthroscopydislocationhiptraction

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Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering

Background:

  • Traction is essential for hip arthroscopy to widen the joint space.
  • Understanding traction force variations and their impact on joint space widening is critical for surgical outcomes.

Purpose of the Study:

  • To quantify the hip joint space widening force during arthroscopy.
  • To investigate the relationship between traction force and the degree of joint space widening.

Main Methods:

  • Traction force was measured in 27 patients undergoing hip arthroscopy.
  • Joint space widening was assessed using calibrated fluoroscopy.
  • Statistical analyses included Friedman, Wilcoxon, Spearman's rho, and regression analyses.

Main Results:

  • Median traction force decreased from 714 N pre-procedure to 520 N after vacuum seal release and 473 N after capsulotomy (p < 0.001).
  • Median joint space widening was 8.8 mm, with a weak correlation (Spearman's rho = -0.13) to traction force.
  • No significant correlation was found between traction force and patient age, BMI, or hip degeneration severity.

Conclusions:

  • A median traction force of 714 N achieves 8.8 mm of joint space widening in hip arthroscopy.
  • Vacuum seal release and capsulotomy significantly reduce required traction force without compromising joint space widening.
  • Patient-specific factors like age, BMI, and degeneration do not significantly influence the required traction force.