Apparatus and method for continuously measuring volumetric blood flow using multiple transducer and catheter for use therewith
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United States of America Patent
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Aug 14, 1990
Grant Date -
N/A
app pub date -
Oct 5, 1988
filing date -
Oct 5, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus for measuring volumetric flow of a liquid in a vessel having a wall and having an axis extending longitudinally of the vessel parallel to the vessel wall. A flexible catheter is adapted to be disposed in the vessel. First and second ultrasonic transducers are carried by the catheter on one side of the catheter and face the wall of the vessel so that the beams from the transducers each cross substantially the longitudinal axis of the vessel. The first transducer beam is inclined at an angle with respect to the longitudinal axis of the vessel. The second transducer beam is inclined in a direction which is generally perpendicular to the longitudinal axis of the vessel.
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