Method and apparatus for measuring functional residual capacity (FRC) and cardiac output(CO)
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United States of America Patent
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Dec 16, 2008
Grant Date -
Dec 9, 2004
app pub date -
May 29, 2002
filing date -
May 29, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a method and an apparatus for measuring Functional Residual Capacity (CO). Further, it relates to a method and an apparatus for measuring cardiac output (CO). The method comprises the steps of determining the amount of oxygen and carbon dioxide being inhaled and exhaled during at least two breathing cycles, identifying at least one difference between said breathing cycles, and estimating the FRC and/or CO based on the determined uptake of oxygen and excretion of carbon dioxide and said identified difference.
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