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Does fluoroscopy improve acetabular component placement in total hip arthroplasty?

Brandon S Beamer1, Jordan H Morgan, Christopher Barr

  • 1Department of Orthopaedic Surgery, Harvard Medical School, Brigham and Women's Hospital, Boston, MA, USA, bbeamer@partners.org.

Clinical Orthopaedics and Related Research
|September 21, 2014
PubMed
Summary

Using fluoroscopy for total hip arthroplasty (THA) significantly improves acetabular component placement within the Lewinnek safe zone compared to freehand techniques. This method offers a simple, cost-effective way to enhance surgical accuracy without increasing operative time.

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Area of Science:

  • Orthopedic Surgery
  • Surgical Technology
  • Biomedical Engineering

Background:

  • Accurate component placement is crucial for total hip arthroplasty (THA) success.
  • Traditional freehand placement using landmarks has demonstrated poor accuracy.

Purpose of the Study:

  • To compare fluoroscopy-assisted versus freehand acetabular cup placement in THA.
  • To evaluate the learning curve, operative time, and leg length discrepancy associated with fluoroscopy use.

Main Methods:

  • 109 patients undergoing THA were analyzed, with 52 receiving freehand cup placement and 57 receiving fluoroscopy-assisted placement.
  • Postoperative radiographs assessed cup abduction, version, and leg length discrepancy.
  • Operative time and patient demographics were recorded as potential confounders.

Main Results:

  • Fluoroscopy use significantly increased placement within the Lewinnek safe zone (65% vs. 44%).
  • The odds of achieving safe zone placement were 2.3 times greater with fluoroscopy (p=0.03).
  • No significant differences were found in operative time, leg length discrepancy, or patient demographics.

Conclusions:

  • Fluoroscopy enhances acetabular component alignment in THA, particularly in complex cases.
  • This technique is a simple, low-cost method to improve surgical outcomes.
  • Further validation is needed for primary THA patients to confirm similar accuracy gains.