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Proving the value of simulation in laparoscopic surgery.
Gerald M Fried1, Liane S Feldman, Melina C Vassiliou
1Steinberg-Bernstein Centre for Minimally Invasive Surgery, Department of Surgery, McGill University, Montreal, Quebec. gerald.fried@mcgill.ca
Annals of Surgery
|August 21, 2004
Summary
The McGill Inanimate System for Training and Evaluation of Laparoscopic Skills (MISTELS) is a valid and reliable tool for teaching and assessing laparoscopic surgical skills. Practicing basic MISTELS drills improves complex laparoscopic task performance.
Area of Science:
- Surgical Education
- Minimally Invasive Surgery
- Medical Simulation
Background:
- The McGill Inanimate System for Training and Evaluation of Laparoscopic Skills (MISTELS) is integral to the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) Fundamentals of Laparoscopic Surgery (FLS) program.
- MISTELS has demonstrated high reliability and correlation with surgical skill in prior studies.
Purpose of the Study:
- To evaluate the construct and predictive validity of the MISTELS physical laparoscopic simulator.
- To assess the educational utility of MISTELS for skill acquisition.
Main Methods:
- Over 200 surgeons and trainees across 5 countries participated in MISTELS assessments.
- Experiments were designed to test system validity and skill transfer from basic to complex laparoscopic tasks.
- A randomized trial assessed the impact of practicing MISTELS transfer drills on suturing skills.
Main Results:
- MISTELS showed strong construct validity, with scores increasing with experience and improving over time in residents.
- External validity was confirmed, with results consistent across multiple sites.
- MISTELS scores correlated significantly with intraoperative technical skill ratings (concurrent validity).
- Practice with MISTELS transfer drills significantly improved intracorporeal suturing skills in novices.
Conclusions:
- MISTELS is a practical, cost-effective inanimate simulator for teaching and measuring technical skills in laparoscopy.
- The system is reliable, valid, and serves as an effective educational tool for laparoscopic surgery training.