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Understanding end-tidal CO2 monitoring American Nurse

Understanding end-tidal CO2 monitoring American Nurse

Gases diffuse from areas of higher concentrations to areas of lower concentration. In the pulmonary artery, deoxygenated blood has a partial pressure of carbon dioxide (Pco2) of approximately 46 mm Hg and a partial pressure of oxygen (Po2) of roughly 40 mm Hg. As a result, oxygen from the alveolus (where Po2 is about 100 mm Hg) diffuses int…Ventilation/Perfusion MatchingCO2 ProductionSidestream MonitorsMainstream MonitorsMicrostream MonitorsClinical Indices For Increased Arterial-To-Etco2 GradientsWaveform AnalysisETco2 reflects metabolism, circulation, and ventilation. In patients with normal pulmonary function, CO2 (normally 35 to 45 mm Hg) and ETco2 should correlate closely, with a deviation of about 2 to 5 mm Hg. Circulating blood CO2 is slightly greater than exhaled CO2 due to a ventilation-perfusion (.V/Q) mismatch. (Not all alveoli participate in gas exchange at a given time, resulting in some shunting.) In acutely ill patients, especially those on mechanical ventilators, pronounced changes in ventilation and/o…See more on myamericannurse.comPublished: Nov 11, 2012Key Facts in End Tidal CO2 monitoring | Medtronic (UK) End Tidal CO 2 Monitoring. End tidal CO 2 monitoring is represented as a number and a graph on a monitor. The number is called capnometry, which is the partial pressure of CO 2 detected at the end of exhalation, ranging between 35 - 45 mm Hg or 4.0 – 5.7 kPa. The waveform is called capnograph and shows how much CO 2 is present at each phase of the respiratory cycle. 1,3.

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