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  • Title: Higher adenoma detection rates with cap-assisted colonoscopy: a randomised controlled trial.
    Author: Rastogi A, Bansal A, Rao DS, Gupta N, Wani SB, Shipe T, Gaddam S, Singh V, Sharma P.
    Journal: Gut; 2012 Mar; 61(3):402-8. PubMed ID: 21997547.
    Abstract:
    OBJECTIVE: Cap-assisted colonoscopy (CAC) uses a small plastic transparent cap attached to the tip of the colonoscope that can depress and flatten colonic folds and thus improve visualisation of their proximal aspects. The aim of this study was to compare CAC with standard colonoscopy (SC; high-definition white light) for adenoma detection rates. DESIGN: This is a prospective randomised controlled trial. SETTING: The study was performed in a tertiary-care Veterans Affairs Medical Center in the USA. PATIENTS: Subjects undergoing screening or surveillance colonoscopy were enrolled. INTERVENTIONS: Subjects were randomised to undergo either CAC or SC. MAIN OUTCOME MEASURES: The outcome measures were the proportion of subjects with at least one adenoma, the number of adenomas detected per subject, insertion time, caecal intubation rates and complications. RESULTS: 420 subjects were enrolled and included in the study (210 in each group). The proportion of subjects with at least one adenoma was higher with CAC compared to SC (69% vs 56%, p=0.009). CAC also detected a higher number of adenomas per subject (2.3 vs 1.4, p<0.001). The caecal intubation time was shorter with CAC (3.29 min vs 3.98 min, p<0.001). The caecal intubation rates were similar in the two groups (99% vs 98%, p=0.37). There were no complications associated with CAC or SC. CONCLUSIONS: CAC detected a 13% higher number of subjects with at least one adenoma and 59% higher adenomas per subject. CAC is a safe, effective and practical means to improve adenoma detection rates. CLINICAL TRIAL REGISTRATION: NCT 01211132.
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