Capnography was first proposed for use in the operating room in 1978 and has since become the standard of care for monitoring ventilation.1 Capnography is rapidly growing in use for intubated and non-intubated applications across hospital environments including the ICU, resuscitation, procedural sedation, and postoperative monitoring of patients receiving opioid analgesia. 1,2 When used appropriately, capnography has been cited as meaningful in providing key, often life- sustaining...