Gas measuring apparatus and method for the continuous...

Details Gas measuring apparatus and method for the continuous... Gas measuring apparatus and method for the continuous...

G - Physics

01

N

73/59

G01N 21/01 (2006.01) A61B 5/083 (2006.01) A61B 5/087 (2006.01) G01N 21/35 (2006.01)

Patent

CA 1041789

ABSTRACT This invention relates to a gas measuring apparatus and method based on infrared absorption and for measuring the CO2 content in respira- tory gas. A method of continually measuring the content of CO2 in respiratory gas, wherein a detector is irradiated by an infrared source via a cyclical respiratory gas flow. Measurement values are continually derived from said detector for both the inhalation and the exhalation phases under the control of respiratory phase detecting means, and these values are divided one by another in calculating means to give a resul- tant indicating approximately the CO2 content.

234844

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