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  • Title: A novel extra-wide-angle-view colonoscope: a simulated pilot study using anatomic colorectal models.
    Author: Uraoka T, Tanaka S, Matsumoto T, Matsuda T, Oka S, Moriyama T, Higashi R, Saito Y.
    Journal: Gastrointest Endosc; 2013 Mar; 77(3):480-3. PubMed ID: 23199903.
    Abstract:
    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. 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. 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. MAIN OUTCOME MEASUREMENTS: The detection rates of simulated polyps. 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 < .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). LIMITATIONS: Not a clinical study. 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.
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