Non-airtight pulmonary measuring device

Details Non-airtight pulmonary measuring device Non-airtight pulmonary measuring device

1978-06-29

1980-09-09

Michell, Robert W.

Surgery

Truss

Pad

128725, A61B 508

Patent

active

042212243

ABSTRACT:
A non-airtight method for determining alveolar ventilation, oxygen uptake and carbon dioxide production which comprises introducing a known amount of an inert gas into the airway of a patient during inspiration and monitoring the expired gas until a steady state is reached wherein the volume of inert gas inhaled is equal to the amount exhaled and subsequently monitoring the expired air containing a known volume of inert gas for inert gas, carbon dioxide and oxygen concentrations.

REFERENCES:
patent: 3507146 (1970-04-01), Webb
patent: 3533398 (1970-10-01), Jones
patent: 3659590 (1972-05-01), Jones et al.
patent: 3666955 (1972-05-01), Suprenant et al.
patent: 3785370 (1974-01-01), Richards et al.
patent: 3896792 (1975-07-01), Vail et al.
patent: 3910261 (1975-10-01), Ragsdale et al.
patent: 3927670 (1975-12-01), Turney et al.
patent: 4034743 (1977-07-01), Greenwood et al.
patent: 4083367 (1978-04-01), Portner et al.
Ray, C. D., "Medical Engineering," pp. 326, 336, Yearbook Publ. Chic., 1974.

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