Surgery – Truss – Pad
Patent
1984-03-23
1985-05-07
Howell, Kyle L.
Surgery
Truss
Pad
A61B 1000
Patent
active
045151644
ABSTRACT:
A portable apparatus for determining the degree of occlusion in a blood vessel. The apparatus includes a transmitter for producing an ultrasonic signal, a first probe for directing the ultrasonic signal to a first location in a blood vessel and a second probe for directing an ultrasonic signal to a second location in the blood vessel. A first receiver receives the ultrasonic signal after return from contact of blood flowing in the blood vessel at the first location and produces a first received signal representative thereof. A second receiver receives the ultrasonic signal after returning from contact with blood vessel at the second location and produces a second received signal representative thereof. A difference measuring circuit receives the first and second received signals and produces a difference signal representative of the difference between the first and second received signals so that a difference in blood flow velocity at the first and second locations can be determined.
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patent: 3766517 (1973-10-01), Fahrbach
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Di Pietro, D. M., "IC's for an Implantable CW Doppler UTS Flowmeter", IEEE Solid State Ckts. Jrnl., vol. 12, #510, 1977, pp. 573-576.
USCI Brochure, "Medsonics Ultrasound Stethoscope", USCI Div. of CR Bond, Inc., Billerica, Mass., Dec. 1974.
Howell Kyle L.
Intech Systems Corp.
Jaworski Francis J.
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