System and a computer program for the determination of quantities relating to the circulatory system of a patient
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United States of America Patent
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-
Apr 24, 2007
Grant Date -
Mar 27, 2003
app pub date -
Aug 19, 2002
filing date -
Sep 7, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for the determination of quantifies relating to the circulatory system of a patient including a device for the non-invasive measurement of the qualitative variation over time of the local concentration of an indicator injected into the blood circulation system at a first position, the measurement taking place at a second position of the blood circulation system. An evaluating unit is provided, in which there is implemented an evaluating algorithm which transforms the qualitative variation into a quantitative variation over time of the local concentration of the indicator injected into the blood circulation system. For the purposes of the transformation, the condition is fulfilled that the cardiac output COdye calculable from the quantitative variation over time of the local concentration in accordance with a predetermined relationship is equal to an input value of the cardiac output COe, which has been determined by thermodilution measurement.
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