End tidal carbon dioxide gas analyzer

Details End tidal carbon dioxide gas analyzer End tidal carbon dioxide gas analyzer

G - Physics

01

N

73/59

G01N 21/35 (2006.01) A61B 5/00 (2006.01) A61B 5/02 (2006.01) A61B 5/083 (2006.01) G01N 33/48 (2006.01)

Patent

CA 1178082

END TIDAL CARBON DIOXIDE GAS ANALYZER ABSTRACT A method and apparatus are described for determin- ing the partial pressure of carbon dioxide in the arterial blood of a patient. The method and apparatus are particu- larly useful where the patient is under anesthesia. Carbon dioxide concentration is measured at the end tidal of the patient's exhaled breath. Nitrous oxide concen- tration is also measured so that the measured values of the carbon dioxide concentration may be corrected in accordance with the measured value of the nitrous oxide concentration. Particular wavelengths of detection are described, together with other apparatus parameters to provide a high level of accuracy.

410025

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