Apparatus for determining whether respiratory gas is present in

Details Apparatus for determining whether respiratory gas is present in Apparatus for determining whether respiratory gas is present in

1991-04-25

1993-01-12

Johnston, Jill A.

Chemistry: molecular biology and microbiology

Measuring or testing process involving enzymes or...

Involving oxidoreductase

128719, 422 56, 422 57, 422 58, 422 87, 436133, 436163, 436167, 436169, C12Q 126, G01N 3122, G01N 33497

Patent

active

051790025

ABSTRACT:
A method and apparatus are is disclosed for determining whether respiratory gas is present in a gaseous sample. The sample is brought into contact with an indicator which yields an indication within a diagnostically effective period of time of the presence in the sample of carbon dioxide in concentration of at least 2% while an indication of the presence of carbon dioxide or other trace acidic gas in a sample of ambient air is delayed beyond a predetermined period of time. The method and apparatus of the present invention have particular utility in determining the correct placement of an endotracheal catheter in a patient or in the direction of apnea.

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Berman, et al., "The Einstein Carbon Dioxide Detector", Anesthesiology 60, (1984), pp. 613-614.

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