1. Igea F, Casellas JA, González-Huix F, et al. Sedation for gastrointestinal endoscopy. Endoscopy. 2014; 46:720–731.
2. Kochhar GS, Gill A, Vargo JJ. On the horizon: the future of procedural sedation. Gastrointest Endosc Clin N Am. 2016; 26:577–592.
3. Vargo JJ, Holub JL, Faigel DO, et al. Risk factors for cardiopulmonary events during propofol-mediated upper endoscopy and colonoscopy. Aliment Pharmacol Ther. 2006; 24:955–963.
4. Block R, Jankowski J, Johnston D, et al. The administration of supplementary oxygen to prevent hypoxia during upper alimentary endoscopy. Endoscopy. 1993; 25:269–273.
5. Griffin SM, Chung SC, Leung JW, et al. Effect of intranasal oxygen on hypoxia and tachycardia during endoscopic cholangiopancreatography. BMJ. 1990; 300:83–84.
6. Rostykus PS, McDonald GB, Albert RK. Upper intestinal endoscopy induces hypoxemia in patients with obstructive pulmonary disease. Gastroenterology. 1980; 78:488–491.
7. Qadeer MA, Vargo JJ, Dumot JA, et al. Capnographic monitoring of respiratory activity improves safety of sedation for endoscopic cholangiopancreatography and ultrasonography. Gastroenterology. 2009; 136:1568–1576.
8. Woods SD, Chung SC, Leung JW, et al. Hypoxia and tachycardia during endoscopic retrograde cholangiopancreatography: detection by pulse oximetry. Gastrointest Endosc. 1989; 35:523–525.
9. Sharma VK, Nguyen CC, Crowell MD, et al. A national study of cardiopulmonary unplanned events after GI endoscopy. Gastrointest Endosc. 2007; 66:27–34.
10. Kellner DB, Urman RD, Greenberg P, et al. Analysis of adverse outcomes in the post-anesthesia care unit based on anesthesia liability data. J Clin Anesth. 2018; 50:48–56.
11. Daley MD, Norman PH, Colmenares ME, et al. Hypoxaemia in adults in the post-anaesthesia care unit. Can J Anaesth. 1991; 38:740–746.
12. Practice Guidelines for Moderate Procedural Sedation and Analgesia 2018: a report by the American Society of Anesthesiologists Task Force on Moderate Procedural Sedation and Analgesia, the American Association of Oral and Maxillofacial Surgeons, American College of Radiology, American Dental Association, American Society of Dentist Anesthesiologists, and Society of Interventional Radiology. Anesthesiology. 2018; 128:437–479.
13. ASGE Standards of Practice Committee, Early DS, Lightdale JR, et al. Guidelines for sedation and anesthesia in GI endoscopy. Gastrointest Endosc. 2018; 87:327–337.
14. Shirota Y, Hirase Y, Suda T, et al. More than half of hypoxemia cases occurred during the recovery period after completion of esophagogastroduodenoscopy with planned moderate sedation. Sci Rep. 2020; 10:4312.
15. Mason KP, Green SM, Piacevoli Q, et al. Adverse event reporting tool to standardize the reporting and tracking of adverse events during procedural sedation: a consensus document from the World SIVA International Sedation Task Force. Br J Anaesth. 2012; 108:13–20.
16. Green SM, Irwin MG, Mason KP, et al. Procedural sedation: providing the missing definition. Anaesthesia. 2021; 76:598–601.
17. Tohda G, Higashi S, Wakahara S, et al. Propofol sedation during endoscopic procedures: safe and effective administration by registered nurses supervised by endoscopists. Endoscopy. 2006; 38:360–367.
18. Coté GA, Hovis RM, Ansstas MA, et al. Incidence of sedation-related complications with propofol use during advanced endoscopic procedures. Clin Gastroenterol Hepatol. 2010; 8:137–142.
19. Slagelse C, Vilmann P, Hornslet P, et al. Nurse-administered propofol sedation for gastrointestinal endoscopic procedures: first Nordic results from implementation of a structured training program. Scand J Gastroenterol. 2011; 46:1503–1509.
20. Mason KP, Roback MG, Chrisp D, et al. Results from the adverse event sedation reporting tool: a global anthology of 7952 records derived from >160,000 procedural sedation encounters. J Clin Med. 2019; 8:2087.
21. Karcz M, Papadakos PJ. Respiratory complications in the postanesthesia care unit: a review of pathophysiological mechanisms. Can J Respir Ther. 2013; 49:21–29.
22. Rose DK, Cohen MM, Wigglesworth DF, et al. Critical respiratory events in the postanesthesia care unit. Patient, surgical, and anesthetic factors. Anesthesiology. 1994; 81:410–418.