title: Colonoscopy with magnetic control system to navigate the forepart of colonoscope shortens the cecal intubation time.
abstract: BACKGROUND
  Colonoscopy is considered the most effective method for diagnosing colorectal diseases, but its application is sometimes limited due to invasiveness, patient intolerance, and the need for sedation.
  
  
  OBJECTIVE
  The aim of this study was to improve the problem of loop formation and shorten the cecal intubation time of colonoscopy by using a magnetic control system (MCS).
  
  
  METHODS
  Two experienced gastroenterologists, three trainees, and a novice repeated colonoscopy without or with MCS on three colonoscopy training model simulator cases. These cases were divided into introductory (case 2) and challenging levels (cases 4 and 5). The cecal intubation times were recorded.
  
  
  RESULTS
  For all cases, the average cecal intubation times for the experienced gastroenterologists with MCS were significantly shorter than without MCS (case 2: 52.45 vs. 27.65 s, p < 0.001; case 4: 166.7 vs. 120.55 s, p < 0.01; case 5: 130.35 vs. 100.2 s, p < 0.05). Those of the trainees also revealed significantly shorter times with MCS (case 2: 67.27 vs. 51 s, p < 0.01; case 4: 253.27 vs. 170.97 s, p < 0.001; case 5: 144.1 vs. 85.57 s, p < 0.001).
  
  
  CONCLUSIONS
  Conducting colonoscopy with MCS is safe and smooth, and shortens the cecal intubation time by navigating the forepart of the colonoscope. In addition, all diagnostic and therapeutic benefits of conventional colonoscopy are retained.
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan, wormyang@yahoo.com.tw.
authors.forename: Chung-Sheng
authors.initials: CS
authors.lastname: Yang
authors.forename: Fat-Moon
authors.initials: FM
authors.lastname: Suk
authors.forename: Chun-Nan
authors.initials: CN
authors.lastname: Chen
authors.forename: Cheng-Long
authors.initials: CL
authors.lastname: Chuang
authors.forename: Joe-Air
authors.initials: JA
authors.lastname: Jiang
authors.forename: Chih-Wen
authors.initials: CW
authors.lastname: Liu
authors.forename: Gi-Shih
authors.initials: GS
authors.lastname: Lien
mesh_terms: D002432:Cecum; D020685:Colonoscopes; D003113:Colonoscopy / Q000193:education / Q000379:methods*; D005260:Female; D006801:Humans; D059346:Magnets; D008297:Male; D008348:Manikins; D008875:Middle Aged; D013997:Time Factors