APPARATUS AND METHOD FOR MEASURING VOLUMETRIC FLOW OF A LIQUID

摘要

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 comprises a flexible catheter (12) adapted to be disposed in the vessel. First and second ultrasonic transducers (T1, T2) are carried by the catheter on one side of the catheter and face the wall of the vessel so that the beams (B1, B2) from the transducers each cross the longitudinal axis of the vessel. The first transducer beam (B1) is inclined at an angle with respect to the longitudinal axis of the vessel. The second transducer beam (B2) is inclined in a direction which is generally perpendicular to the longitudinal axis of the vessel.