System for calculating compliance and cardiac hemodynamic parameters
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 13, 1995
Grant Date -
N/A
app pub date -
Aug 30, 1993
filing date -
Aug 30, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A catheter set (10) is used in connection with a blood flow monitor and calibration system (80) to determine the compliance C of a vessel according to the equation C=dV2/ (PE-PA), where dV2 is the change in volume of the vessel created by the change in volume (e.g., deflation) of a displacement balloon (30) adjacent to a catheter (14), PE is an estimate of what the pressure measured by a pressure transducer (56) or a strain gage (78) would have been but for the change in volume of the displacement balloon at a particular time, and PA is the actual pressure measured by the transducer at the particular time. The determined compliance is more accurate than that obtained through thermal dilution procedures. The determined value of compliance C may then be used in calculation of blood flow. In addition, pulmonary vascular resistance and systemic vascular resistance may calculated through procedures and in equations using the determined compliance without directly measuring the pulmonary capillary wedge pressure.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully