title: Benefit of a 360-degree horizontal turn following premedication with simethicone on image quality during gastroendoscopy: a randomized controlled trial.
abstract: OBJECTIVE
  To investigate whether a 360-degree horizontal turn after oral premedication with simethicone improves the mucosal visibility during gastroendoscopic examination, and to determine the proper time to turn over the patient.
  
  
  METHODS
  This study involved 993 patients scheduled for gastroendoscopy. Just before gastroendoscopy, after oral premedication with simethicone, patients were randomly assigned to three groups: in Group A, patients waited for 20 min before gastroendoscopy; in Group B, patients were separately waited for 5/10/15/20 min and were then turned 360 degrees just before gastroendoscopy; in Group C, patients were immediately turned 360 degrees and then separately waited for 5/10/15/20 min before examination. The sum of the gastric mucosal visibility scores (MVS) was calculated after the examination. The MVS and proportion of images with higher visibility scores for the mucosal surface. Lower scores indicate better visibility of the mucosal surface.
  
  
  RESULTS
  In Groups B and Groups C, when waiting time more than 10 min had lower mean total MVS than Group A. The MVS of four subgroups of Group B were not different from those of Group C.
  
  
  CONCLUSIONS
  Oral premedication with simethicone and immediately make a body posture change (turning over 360 degrees) then waiting for 10min can increase the image quality during gastroendoscopy and effectively decrease the premedication time.
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Chunhua
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Liu
authors.affiliation: Department of Air Duty of Hospital 463 of PLA Liaoning, Shenyang, China.
authors.forename: Xiuming
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Shen
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Wenjing
authors.initials: W
authors.lastname: Sun
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Qingjun
authors.initials: Q
authors.lastname: Yan
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Cao
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Xueqin
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Chunhui
authors.initials: C
authors.lastname: Lan
authors.affiliation: Department of Gastroenterology, Institute of Surgery Research Daping Hospital, Third Military Medical University Chongqing, China.
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Chen
keywords: Gastroendoscopy; mucosal visibility score; simethicone; turn over