Respiratory Depression in Non-Operating Room Anesthesia: An Overview

Non-operating room anesthesia (NORA) is a rapidly growing domain for anesthesia professionals due to advances in procedural technology and increased emphasis on patient comfort. The majority of these procedures are conducted under monitored anesthesia care (MAC) where patients receive varying levels of sedation. Analysis of the Anesthesia Closed Claims database suggests that adverse respiratory events continue to be the main cause of morbidity and mortality in patients undergoing NORA procedures. Most NORA claims occurred under MAC, with oversedation leading to respiratory depression coupled with inadequate monitoring making up the majority of claims. The American Society of Anesthesiologists (ASA) has released standards of pre-anesthesia, intraoperative monitoring, and post-anesthesia care, which apply to all anesthetizing locations including NORA. The ASA has also made recommendations in a statement on NORA to promote patient safety. Evidence suggests that patient characteristics, monitoring tools, physical constraints, and team familiarity play a role in the risk for adverse respiratory events. Future studies are required to further understand the challenges specific to NORA locations.