A novel extra-wide-angle-view colonoscope: a simulated pilot study using anatomic colorectal models

作者：Uraoka Toshio^*; Tanaka Shinji; Matsumoto Takayuki; Matsuda Takahisa; Oka Shiro; Moriyama Tomohiko; Higashi Reiji; Saito Yutaka

来源：Gastrointestinal Endoscopy, 2013, 77(3): 480-483.

DOI：10.1016/j.gie.2012.08.037

Background: A major factor that may contribute to a higher adenoma miss rate during colonoscopy is undetected lesions located behind haustral folds, flexures, or rectal valves. %26lt;br%26gt;Objective: To assess the efficacy of a prototype, novel, extra-wide-angle-view colonoscope that provides a simultaneous lateral-backward view that complements the forward view lens. %26lt;br%26gt;Design: A simulated pilot study of two anatomic colorectal models, each prepared with 8 polyps positioned in obvious locations and 8 polyps placed behind folds. Thirty-two endoscopists with different levels of experience performed examinations on models in a random order by using the extra-wide-angle-view colonoscope and a standard colonoscope. %26lt;br%26gt;Main Outcome Measurements: The detection rates of simulated polyps. %26lt;br%26gt;Results: The mean detection rate for all simulated polyps with the extra-wide-angle-view colonoscope was significantly higher than that with the standard colonoscope (68% vs 51%; P %26lt; .0001). The detection rate for polyps behind folds was significantly higher in the extra-wide-angle-view colonoscope than in the standard colonoscope (61.7% vs 46.9%; P = .0009). %26lt;br%26gt;Limitations: Not a clinical study. %26lt;br%26gt;Conclusion: The novel, extra-wide-angle-view colonoscope may represent an advancement in colorectal polyp detection. The value of the colonoscope for clinical use awaits further study. (Gastrointest Endosc 2013;77:480-3.)

• 出版日期2013-3