Method and apparatus for evaluation of a device for...

Details Method and apparatus for evaluation of a device for... Method and apparatus for evaluation of a device for...

2006-03-27

2010-10-19

Raevis, Robert R (Department: 2856)

Measuring and testing

Instrument proving or calibrating

Gas or liquid analyzer

Reexamination Certificate

active

07814774

ABSTRACT:
A method of evaluating a measuring device for measuring, in normal operation, a diffusion capacity of a person's lungs by measuring a change of concentration of a gas species in a mixture, when the mixture is inhaled and subsequently exhaled by the person or imposed by an artificial ventilator, the method comprising the steps of: (a) receiving the mixture in a compartment; (b) circulating gas from the compartment back to the compartment through a circulation circuit; and (c) selectively reducing partial pressure of the gas species in the circulation circuit to a predetermined level. A device for implementing the evaluation method is also disclosed.

REFERENCES:
patent: 2068882 (1937-01-01), Walker
patent: 5193551 (1993-03-01), Pilipski
patent: 5303712 (1994-04-01), Van Duren
patent: 5596129 (1997-01-01), Murashige et al.
patent: 6415642 (2002-07-01), Crapo et al.
patent: 1109018 (2001-06-01), None
patent: 00/72754 (2000-12-01), None

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