To compare forward-viewing with ultrawide-viewing colonoscopy in the detection of simulated colon polyps in an in vitro colon model.
Prospective, multicenter.
Six endoscopy units (3 in the United States and 3 in Israel).
In vitro colon model with simulated colon polyps (n = 21 metallic beads).
Detection of simulated colon polyps on colonoscope withdrawal.
Incremental detection of simulated colon polyps and endoscopist evaluation of the usability, visibility, and maneuverability of ultrawide-viewing colonoscopy.
On forward-viewing colonoscopy, the number of simulated polyps (mean ¡À standard deviation) detected per endoscopist was 11.1 ¡À 2.3 polyps, a 52.9 % detection rate. Simulated polyp detection rates per colon segment were 3.0 ¡À 0.93 (60.0 % ) right colon, 2.4 ¡À 0.87 (48.0 % ) transverse colon, and 5.7 ¡À 1.5 (51.8 % ) left colon. On ultrawide-viewing colonoscopy, the simulated polyp detection rate per endoscopist significantly increased to 18.0 ¡À 1.98 polyps, an overall 85.7 % polyp detection rate (
Nonrandomized design, use of a colon model, and ¡°simulated¡± colon polyps.
Ultrawide-view colonoscopy significantly improved simulated polyp detection in a colon model. Clinical studies in human subjects should be pursued to further evaluate this new endoscopic technology.