End tidal carbon dioxide gas analyzer

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

1981-08-24

1984-01-03

Howell, Kyle L.

Surgery

Truss

Pad

128633, 12820422, 250345, A61B 508

Patent

active

044237391

ABSTRACT:
A method and apparatus are described for determining the partial pressure of carbon dioxide in the arterial blood of a patient. The method and apparatus are particularly useful where the patient is under anesthesia. Carbon dioxide concentration is measured at the end tidal of the patient's exhaled breath. Nitrous oxide concentration 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.

REFERENCES:
patent: 3790797 (1974-02-01), Sternberg et al.
patent: 3893770 (1975-07-01), Takami et al.
patent: 3898462 (1975-08-01), Ishida et al.
patent: 3953734 (1976-04-01), Dimeff
patent: 4011859 (1977-03-01), Frankenberger
patent: 4013260 (1977-03-01), McClatchie et al.
patent: 4110619 (1978-08-01), Zorner
patent: 4153837 (1979-05-01), Ross
patent: 4180734 (1979-12-01), Gedean
patent: 4281248 (1981-07-01), Fabinski et al.
Nishi et al., Mass Spectroscopy, vol. 22, No. 3, Sep. 1974, pp. 191-198.
Puritan-Bennett/Datex "CO.sub.2 Monitor & Recorder".

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