Towards virtual FLS: development of a peg transfer simulator

Int J Med Robot. 2014 Sep;10(3):344-55. doi: 10.1002/rcs.1534. Epub 2013 Sep 13.

Abstract

Background: Peg transfer is one of five tasks in the Fundamentals of Laparoscopic Surgery (FLS), program. This paper reports the development and validation of a Virtual Basic Laparoscopic Skill Trainer-Peg Transfer (VBLaST-PT(©) ) simulator for automatic real-time scoring and objective quantification of performance.

Methods: New techniques have been introduced in order to allow bi-manual manipulation of pegs and automatic scoring/evaluation while maintaining high quality of simulation. A preliminary face and construct validation study was performed with 22 subjects divided into two groups: experts (PGY 4-5, fellow and practicing surgeons) and novice (PGY 1-3).

Results: Face validation shows high scores for all aspects of the simulation. Two-tailed Mann-Whitney U-test scores showed significant differences between the two groups on completion time (P = 0.003), FLS score (P =0.002) and the VBLaST-PT© score (P = 0.006).

Conclusions: VBLaST-PT(©) is a high quality virtual simulator that showed both face and construct validity.

Keywords: construct validation; face validation; haptics; minimally invasive surgery; physics-based simulation; surgical simulation; virtual reality.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Algorithms
  • Clinical Competence
  • Computer Simulation
  • Computers
  • Equipment Design
  • Hand Strength
  • Humans
  • Laparoscopy / education*
  • Laparoscopy / methods
  • Reproducibility of Results
  • Robotic Surgical Procedures / methods*
  • Robotics / methods*
  • Task Performance and Analysis
  • Touch
  • User-Computer Interface