Method and apparatus for measuring flow rate, particularly of bl

Details Method and apparatus for measuring flow rate, particularly of bl Method and apparatus for measuring flow rate, particularly of bl

1995-08-02

1997-04-15

Sykes, Angela D.

Surgery

Truss

Pad

128691, 356 28, A61B 5026

Patent

active

056200005

ABSTRACT:
A method for measuring the flow rate of a liquid, particularly of blood, in which the frequency shift of a laser beam reflected from the liquid is determined according to the optical Doppler effect. This method and the apparatus provided for its implementation are designed so as to enable reliable measurement of the flow rate of the flowing medium which is resolved both spatially and with respect to time. In accordance with the invention at each scanning point a number of N measured values is collected corresponding to the reflected light, N being a whole number equal to or larger than 2; the Doppler shift is calculated from the time variation of the thus measured intensity of the reflected light at the respective scanning points, and the flow rate is determined from the Doppler shift at each point of the scanning pattern.

REFERENCES:
patent: 4142796 (1979-03-01), Riva
patent: 4743110 (1988-05-01), Arnaud et al.
patent: 4979818 (1990-12-01), Kobayashi
patent: 5090416 (1992-02-01), Ogino et al.
patent: 5170276 (1992-12-01), Zinser
patent: 5240006 (1993-08-01), Fujii et al.
Duteil et al., "A Double Wavelength Laser Doppler System to Investigate Skin Microcirculation," IEEE Transactions on Biomedical Engineering, vol. BME-32, No. 6, Jun. 1985, pp. 439-447.
Abstract of Published Japanese Patent No. 62-195,533.
Chehroudi et al., "A rapidly scanning . . . ", J. Phys. E: Sci. Instrum., vol. 17, pp. 131-136 (1984).
Durst et al., "Laser-Doppler system . . . ", Rev. Sci. Instrum., vol. 52 (11), pp. 1676-1681 (1981).

Affiliated with

Also associated with

Rating

Method and apparatus for measuring flow rate, particularly of bl does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for measuring flow rate, particularly of bl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring flow rate, particularly of bl will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-354345