Method and apparatus for measuring cardiac output
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United States of America Patent
Stats
-
Feb 25, 1986
Grant Date -
N/A
app pub date -
Apr 21, 1982
filing date -
Apr 21, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Cardiac output is measured utilizing an indicator, such as saline, which alters blood resistivity, and an electrically calibrated conductivity cell positioned at the tip of a catheter. The catheter with the tetrapolar conductivity cell at the tip is inserted into a blood vessel for current injection to develop a potential which is proportional to blood resistivity for inscribing the dilution curve occurring due to injection of the indicator, which curve is utilized to determine blood flow or cardiac output.
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