Hydrodynamic system for blood flow measurement

Details Hydrodynamic system for blood flow measurement Hydrodynamic system for blood flow measurement

1992-03-23

1993-12-21

Cohen, Lee S.

Surgery

Truss

Pad

128692, 7386171, A61B 502

Patent

active

052714080

ABSTRACT:
A device for measuring blood flow in the vicinity of a catheter implanted within the vascular vessel or the heart uses hydrodynamic principles. The device has two transducers mounted at the exterior surface of the catheter spaced from each other. One of the transducers has a protrusion in the form of a hydrofoil profile, and the other transducer presents a substantially flat surface at the exterior of the catheter. The transducer having the hydrofoil profile generates a signal due to the quasi-static pressure acting on the transducer as well as due to the drag force acting on the transducer caused by the blood flow. The other transducer generates a signal solely due to the quasi-static pressure. The transducers can either be connected with opposite polarity, or their respective signals can be subtracted in a differential amplifier, so that a signal proportional to the axial flow velocity is obtained.

REFERENCES:
patent: 4237729 (1980-12-01), McLeod et al.
patent: 4691709 (1987-09-01), Cohen
patent: 4697595 (1987-10-01), Breyer et al.
patent: 4706681 (1987-11-01), Breyer et al.
patent: 4757821 (1988-07-01), Snyder
patent: 4771787 (1988-09-01), Wurster et al.
patent: 4783994 (1988-11-01), Ashby, Jr.
patent: 4790323 (1988-12-01), Leavitt et al.
patent: 5069679 (1991-12-01), Taheri
patent: 5099686 (1992-03-01), Kohler
"Possibilities of Ultrasound Catheters," Breyer et al. Int. J. Card. Imag., vol. 6 (1991) pp. 277-284.
"Properties of Ultrasonically Marked Leads," Breyer et al. PACE, vol. 12, Aug. 1989, pp. 1369-1380.

Affiliated with

Also associated with

Rating

Hydrodynamic system for blood flow measurement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydrodynamic system for blood flow measurement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrodynamic system for blood flow measurement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-303164