5/13/2024 0 Comments Etco2 capnography![]() (1) Arterial CO2 should be higher than etCO2.This leads to two foundational principles of etCO2:.#3) By the time gas reaches the endotracheal tube, the end-tidal CO2 concentration will be lower than the arterial CO2 tension.#2) As gas flows from this alveolus out of the lung, it will be diluted by dead space gas that will have a lower CO2 concentration (since this dead space gas doesn't absorb CO2 from the blood). ![]()
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