Abstract
Capnography, or noninvasive measurement of maximum partial pressure of carbon dioxide (CO2) at the end of an exhaled breath, or end-tidal CO2 (EtCO2), can be used to continuously monitor a respiratory cycle. In procedures involving moderate sedation, capnography can detect hypoventilation prior to development of hypoxemia, potentially improving safety. In 2011, the American Society of Anesthesiologists (ASA) recommended EtCO2 monitoring of moderate sedation during endoscopy, yet there are few prospective studies to support its use for routine endoscopy.
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