Study design and patients
This randomized, double-blinded and controlled study was approved by the
Committee on Ethics of Biomedicine Research, Shidong Hospital in
Shanghai and was also registered in Chinese Clinical Trial Registry
ChiCTR2100042252 prior to its start. A total of 90 ASA I-III elderly
patients undergoing gastrointestinal endoscopy from November, 2020 to
March, 2021, aged 65-89 years, were enrolled in this study and patients’
consents were signed before the endoscopic procedures. In our
gastrointestinal endoscopy center, as a routine, each patient undergoes
both gastroscopy and colonoscopy under one anesthesia experience.