Process for determining the functional residual capacity of the lungs
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United States of America Patent
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-
Apr 8, 2003
Grant Date -
May 2, 2002
app pub date -
Jul 11, 2001
filing date -
Sep 20, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is provided for determining the functional residual capacity (FRC) of the lungs during respiration. An environmentally friendly trace gas is used in a process and system for determining the FRC by using fluoropropanes as a trace gas. Values for the FRC can thus be calculated, resolved for individual breaths, from the expiratory trace gas concentration and the expired breathing gas volume and they can be used for determining the FRC depending on their convergence behavior.
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