Cyclic injection method for continuous measurements of pulmonary parameters
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United States of America Patent
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Dec 14, 1982
Grant Date -
N/A
app pub date -
Aug 22, 1980
filing date -
Aug 22, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A non-invasive cyclic injection method for determining pulmonary blood flow, the ventilation-perfusion distribution and functional residual capacity, which consists of the non-invasive cyclical introduction of soluble and insoluble inert gases into the airstream of the human patient, each period of introduction followed by a similar period free from the introduction of soluble inert gases to allow for the washout of their concentrated buildup in the venous system. Sampling and analysis of expired air during all parts of the cyclic injection and non-injection of gases takes place with the results being electronically obtained and translated into digital data indicative of the parameter being determined.
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