Method of correcting componential concentration in...

Details Method of correcting componential concentration in... Method of correcting componential concentration in...

G - Physics

01

N

G01N 37/00 (2006.01) A61B 5/08 (2006.01) A61B 5/083 (2006.01) G01N 33/497 (2006.01)

Patent

CA 2134134

ABSTRACT OF THE DISCLOSURE A first sample measuring passage provided between a collection port and a suction pump has a sample gas measurer for measuring expiration components, while a second sample measuring passage which is provided in parallel with the first sample measuring passage has a standard gas measurer for measuring O2 gas. Assuming that [A] represents a measured value of a target component in an expiration sample and [b1] represents O2 concentration in the expiration sample, correction is made on the basis of: [A'] = f1?(21-[a1])[A]/(21-[b1]) where [A'] represents the corrected measured value of the target component, [a1] represents O2 concentration in end- tidal air which is supplied as a constant such as 15.3, for example, and f1 represents an experimentally prescribed coefficient such as 1.67, for example.

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