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Video Movement Analysis Using Smartphones (ViMAS): A Pilot Study
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Assessing vaginal surgical skills using video motion analysis.

Gouri B Diwadkar1, Antonie van den Bogert, Matthew D Barber

  • 1From the Obstetrics, Gynecology and Women's Health Institute, and Department of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio.

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Summary

Video motion analysis objectively quantifies surgical skills in vaginal hysterectomy. Experienced surgeons demonstrate superior efficiency and precision in key steps compared to novices.

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Area of Science:

  • Surgical Education
  • Medical Technology
  • Gynecologic Surgery

Background:

  • Objective assessment of surgical skill is crucial for effective training.
  • Vaginal hysterectomy requires precise technical execution.
  • Distinguishing between novice and experienced surgical performance is essential for curriculum development.

Purpose of the Study:

  • To assess the feasibility of video motion analysis for quantifying vaginal hysterectomy.
  • To identify measurable differences in surgical technique between novice and experienced trainees.
  • To establish objective metrics for surgical proficiency in vaginal hysterectomy.

Main Methods:

  • Video motion analysis was applied to key steps: clamping, transecting, and suturing the uterosacral ligament.
  • Surgical trainees were categorized as novice (n=9) or experienced (n=14) based on prior vaginal hysterectomy experience (cutoff of 25 procedures).
  • Contrasting-groups analysis identified cutoff values differentiating novice from expert performance.

Main Results:

  • Novice trainees exhibited longer task completion times (112 vs. 84 seconds) and greater translational motion (92 vs. 49 cm).
  • Experienced trainees demonstrated more accurate clamp angulation (96 vs. 109 degrees) during needle passage.
  • Expert performance was associated with task completion ≤112 seconds, motion ≤75 cm, and clamp-to-retractor angle ≤105 degrees.

Conclusions:

  • Video motion analysis provides a feasible and objective method for evaluating surgical skills in vaginal procedures.
  • Quantifiable differences exist in the technical execution of vaginal hysterectomy between novice and experienced surgeons.
  • Motion analysis offers a valuable tool for surgical skill assessment and training feedback.