• Roy Phitayakorn, Jeffrey M Marks, Harry L Reynolds, and Conor P Delaney.
• Department of Surgery, University Hospitals Case Medical Center, Cleveland, OH 44106-5047, USA. ropst14@hotmail.com
• Surg Endosc. 2009 Mar 1; 23 (3): 611-4.

BackgroundThere is increasing interest in the use of virtual-reality simulators in general surgery residency training. Many simulators lack a benchmark against which trainees can measure competence and skill.MethodsSurgeons who had performed over 1,000 colonoscopies were evaluated on module 1, case 5 of the GI Mentor I or II virtual-reality endoscopy simulator (Simbionix, Cleveland). Participants were given 5 min to familiarize themselves with the simulator, and then performed the study case with standardized instructions. Metrics were recorded by using the previously calibrated simulator.ResultsTwenty-three surgeons (21 male, 2 female) participated. Mean height was 69.6 +/- 2.6 inches, mean age 51 +/- 9 years, median surgical glove size 7.5, and surgeons had 18.8 +/- 10.1 years of practice, and did 8 +/- 6 colonoscopies weekly. Ten participants had advanced training in endoscopy, laparoscopy or colorectal surgery; eight had used the simulator before, of whom six had used it once. Mean time to complete the study case was 13.6 +/- 5.3 min and time to reach the cecum was 6.5 +/- 4.3 min. Participants examined 92.3 +/- 3.6% of the simulated colonic mucosa with a clear view of the lumen 89.5 +/- 4.2% of the time. Total time the colon was looped was 22 +/- 35 s (range 0-133 s). The overall efficiency of screening was 70.33 +/- 23.45% (range 20-94%). Participants tended to mistake normal simulated colonic structures as pathology.ConclusionPerformance on a virtual-reality endoscopic simulator has a wide amount of variability even among a group of experienced endoscopists. Expert benchmark tests should be performed on simulators that will be used for resident assessment prior to any attempts at certification of competence.

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