Surgery – Truss – Pad
Patent
1987-01-20
1989-02-07
Smith, Ruth
Surgery
Truss
Pad
128713, 7386125, A61B 1000
Patent
active
048024902
ABSTRACT:
A catheter, particularly adapted for cardiac output determination, comprises an elongated tube of flexible material, the tube having a substantially rigid distal portion on which is disposed an ultrasonic transducer and a proximate, inflatable balloon. The ultrasonic transducer is arranged so as to direct a beam of ultrasound toward a transverse plane that bisects the balloon, and is connected by appropriate leads to a conventional Doppler circuit. With the balloon deflated, the signal from the Doppler circuit is sensed to measure blood velocity. Thereafter, the balloon is inflated so that it has a predetermined cross-sectional area in the transverse plane. The signal from the Doppler circuit is again sensed to measure blood velocity. Using a simple mathematical relationship, the effective internal cross-sectional area of the blood vessel is determined from the two measured velocities and from the predetermined cross-sectional area of the balloon when inflated. The volumetric flow rate is then determined by multiplying the first measured velocity by the effective internal cross-sectional area.
REFERENCES:
patent: 3938502 (1976-02-01), Bom
patent: 4237729 (1980-12-01), McLeod et al.
patent: 4319580 (1982-03-01), Colley et al.
patent: 4459853 (1984-07-01), Miwa et al.
patent: 4566460 (1986-01-01), Sato et al.
patent: 4582067 (1986-04-01), Silverstein et al.
patent: 4637401 (1987-01-01), Johnston
Wells, "Biomedical Ultrasonics", 1977, pp. 354-357.
LandOfFree
Catheter for performing volumetric flow rate determination in in does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Catheter for performing volumetric flow rate determination in in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catheter for performing volumetric flow rate determination in in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1079459