Editing Capnography (section)

== Registered nurses ==
[[Registered nurse]]s, but more so RRTs (respiratory therapists), in critical care settings may use capnography to determine if a [[nasogastric tube]], which is used for feeding, has been placed in the trachea as opposed to the esophagus.<ref>Potter, Patricia Ann, and Anne Griffin Perry. "Nutrition." Essentials for nursing practice. Eighth ed. St. Louis: Elsevier, 2015. 940. Print.</ref> Usually a patient will cough or gag if the tube is misplaced, but most patients in critical care settings are sedated or comatose. If a nasogastric tube is accidentally placed in the trachea instead of the esophagus, the tube feedings will go into the lungs, which is a life-threatening situation. If the monitor displays typical {{chem|CO|2}} waveforms then placement should be confirmed.<ref>{{Cite journal| last1=Roubenoff |first1=Ronenn | last2=Ravich |first2=William |date=April 1998 |title= Pneumothorax due to nasogastric feeding tubes. Report of four cases, review of the literature, and recommendations for prevention | journal=Arch Intern Med |language=en |volume=149 |issue=1 |pages=184–188|doi=10.1001/archinte.1989.00390010156022 |pmid=2492185 }}</ref>