Methods and apparatus for monitoring cardiac output
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United States of America Patent
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Jan 10, 1989
Grant Date -
N/A
app pub date -
Aug 9, 1985
filing date -
Aug 9, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for ascertaining the cardiac output of a human patient, said method comprising the steps of: measuring the systolic velocity of the blood flowing through the patient's descending aorta; determining the cross-sectional area of the patient's ascending aorta; and calculating the patient's cardiac output from said systolic velocity and said aortic area. The cardiac output can be converted: (1) to cardiac index by dividing it by the patient's body surface area, and (2) to systemic vascular resistance by dividing a value representing the patient's blood pressure by said cardiac output.
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