The Anesthesia Machine - Gas Analysis

Several methods are used to monitor concentrations of O2, CO2, and anesthetic gases in the breathing system. The oxygen analyzer is the most important monitor for detecting a hypoxic gas mixture. Capnometry, the measurement of CO2, has many uses, including monitoring the adequacy of ventilation and detecting breathing system faults. Breath-to-breath monitoring of anesthetic concentrations provides tracking of anesthetic uptake and distribution. Most gas analyzers incorporate alarms. Among the techniques for measurement are the following:

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