Method to increase transpulmonary thermodilution cardiac output accuracy by use of extravascular thermovolume to control the amount of thermal indicator
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United States of America Patent
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May 28, 2002
Grant Date -
N/A
app pub date -
Oct 27, 2000
filing date -
Oct 28, 1999
priority date (Note) -
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Abstract
The present invention relates to a method for determining the cardiac output of a subject by thermodilution measurements by providing a predetermined amount of thermal indicator in a blood vessel with the thermal indicator having a temperature different from the temperature of subject's blood, thus exhibiting an indicator temperature difference. By measuring the temperature of subject's blood at a second place downstream the cardiac output (CO) and the extravascular thermovolume can be determined as a function of the time for the thermodilution curve. As a function of the thermodilution curve the measurements of the amount of thermal indicator and/or thermal indicator volume temperature difference are adjusted to provide a more accurate determination of cardiac output.
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