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In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
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The Relationship Between Body Mass Index and Fluoroscopy Time During Intraarticular Hip Injection: A Multicenter

Zachary L McCormick1, Meghan Bhave2, David T Lee3

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Summary

Fluoroscopy time for hip injections increases with higher body mass index (BMI) in experienced hands, but not with trainees. Lower BMI patients require longer fluoroscopy when trainees are involved.

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Area of Science:

  • Medical Imaging
  • Pain Management
  • Orthopedics

Background:

  • Higher body mass index (BMI) can complicate imaging procedures.
  • Limited research exists on BMI's effect on fluoroscopy time for intraarticular (IA) hip injections.
  • Trainee involvement in academic centers may influence this relationship.

Purpose of the Study:

  • To investigate the association between BMI and fluoroscopy time during IA hip injections.
  • To compare this relationship with and without trainee participation.

Main Methods:

  • A multicenter retrospective cohort study was conducted.
  • Data from 559 IA hip injections across three academic centers were analyzed.
  • Fluoroscopy times were compared across normal, overweight, and obese BMI categories.

Main Results:

  • No significant difference in fluoroscopy time was found across BMI categories overall.
  • However, without trainees, fluoroscopy times decreased significantly with lower BMI categories.
  • Patients with normal BMI required the shortest fluoroscopy times when trainees were not involved.

Conclusions:

  • Fluoroscopy time for IA hip injections increases with BMI for experienced clinicians.
  • This BMI-fluoroscopy time relationship is not observed when trainees are involved.
  • Trainee involvement may lead to longer fluoroscopy times for lower BMI patients.