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Virtual pointer for gaze guidance in laparoscopic surgery.

Yuanyuan Feng1, Hannah McGowan2, Azin Semsar2

  • 1Department of Information Systems, University of Maryland, Baltimore County, Baltimore, MD, USA. fengy1@umbc.edu.

Surgical Endoscopy
|October 6, 2019
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Summary
This summary is machine-generated.

A virtual pointer improved laparoscopic surgical training by concentrating novices' gaze during simulated tasks. This technology enhances focus on anatomical targets, aiding skill acquisition in surgical trainees.

Keywords:
Eye trackingFixation concentrationGaze guidanceIntraoperative video annotationLaparoscopic training

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Area of Science:

  • Surgical Education
  • Medical Simulation
  • Human-Computer Interaction

Background:

  • Laparoscopic surgery training challenges include interpreting indirect visual fields.
  • Developing "professional vision" is crucial for surgical trainees.
  • A virtual pointer (VP) was designed for expert guidance over laparoscopic videos.

Purpose of the Study:

  • To investigate the efficacy of a virtual pointer in guiding novices' gaze patterns during laparoscopic training.
  • To compare gaze behaviors between virtual pointer-guided training and standard verbal instruction.

Main Methods:

  • A within-subject trial with seven surgical trainees performing simulated laparoscopic tasks.
  • Eye-tracking (Tobii Pro X3-120) measured fixation rate, saccade amplitude, and fixation concentration.
  • Counter-balanced comparison between virtual pointer and standard training conditions.

Main Results:

  • No significant differences in fixation rate or saccade amplitude were observed.
  • Trainees exhibited more concentrated fixations with the virtual pointer (p=0.039).
  • Longer fixations were more clustered in the virtual pointer condition (p=0.008).

Conclusions:

  • The virtual pointer effectively enhanced trainees' in-the-moment gaze focus.
  • It reduced gaze dispersion and concentrated attention on anatomical targets.
  • Expert-driven, intraoperative technologies can efficiently modify novice gaze behaviors.