title: The efficacy of cap-assisted colonoscopy performed by a single endoscopist in patients after colorectal resection.
abstract: BACKGROUND
  The use of a transparent cap is regarded as a simple method to obtain better outcomes compared with standard colonoscopy. In this study, we investigated whether cap-assisted colonoscopy can improve the quality of procedure-related outcomes in patients with a history of colorectal resection.
  
  
  METHODS
  This study was designed as a prospective, randomized, controlled trial conducted at a single tertiary center by a single endoscopist (Kang J.). A total 183 patients after colorectal resection due to primary colorectal cancer were enrolled and 1:1 randomized to undergo either cap-assisted colonoscopy (CAP group) or standard colonoscopy (non-CAP group). The primary endpoint was the comparison of cecal intubation time between the 2 groups.
  
  
  RESULTS
  The mean cecal intubation time of the CAP group (n = 89) was significantly shorter than that of the non-CAP group (n = 89) (538 seconds vs 677 seconds, P = 0.024). In the CAP group, the endoscopist performed faster intubation than average more often compared with the non-CAP group (71.9% vs 57.3%). In regard to moving average curve, the CAP group showed a gentle slope during the learning period, while the non-CAP group showed a steep decrease.
  
  
  CONCLUSIONS
  The cap-assisted colonoscopy could reduce cecal intubation time and achieve more frequent faster intubation compared with standard colonoscopy in patients after colorectal resection.
authors.affiliation: Department of Surgery, Gangnam Severance Hospital Department of Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Im-Kyung
authors.initials: IK
authors.lastname: Kim
authors.forename: Jeonghyun
authors.initials: J
authors.lastname: Kang
authors.forename: Seung Hyuk
authors.initials: SH
authors.lastname: Baik
authors.forename: Kang Young
authors.initials: KY
authors.lastname: Lee
authors.forename: Seung-Kook
authors.initials: SK
authors.lastname: Sohn
mesh_terms: D000368:Aged; D003113:Colonoscopy / Q000295:instrumentation* / Q000706:statistics & numerical data; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis*; D011446:Prospective Studies