Apparatus and method for continuously measuring volumetric blood

Details Apparatus and method for continuously measuring volumetric blood Apparatus and method for continuously measuring volumetric blood

1988-10-05

1990-08-14

Jaworski, Francis

Surgery

Truss

Pad

A61B 812

Patent

active

049478524

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.

REFERENCES:
patent: 3542014 (1970-11-01), Peronneau
patent: 4674336 (1987-06-01), Johnston
patent: 4733669 (1988-03-01), Segal
patent: 4841977 (1989-06-01), Griffith et al.
Sabar, M. E. et al., -"Pulsed Doppler: Diameter BF & VF of Biochiral Artery", Circulation, vol. 63 No. 2 Feb. 1981.

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