Surgery – Truss – Pad
Patent
1980-03-24
1982-05-04
Michell, Robert W.
Surgery
Truss
Pad
A61B 1000
Patent
active
043277390
ABSTRACT:
In order to perform a non-invasive measurement of the blood flow rate in the smallest vessels, i.e. the capillaries, of a blood vessel bed, and to detect the presence of erythrocyte aggregations therein, acoustic pulses containing oscillations at a frequency above 20 MHz are directed through the skin of a subject from a crystal transducer and the resulting echo pulses are processed to produce information based on the Doppler frequency signals relating to blood flow in a predetermined direction and occurring within a time window corresponding to the distance from the crystal of the blood vessels to be examined. Interspersed between the above-mentioned pulses, spike pulses having a duration of the order of 20 ns are similarly transmitted, and echoes thereof are detected for the purpose of detecting the presence of erythrocyte aggregations.
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Grossman, H., "Bloodflow Measuring Process" Patentschrift (Deutsche Demokratische Republik) DL 133 040 Nov. 29, 1978.
Chmiel Horst
Mauser Rudolf
Jaworski Francis J.
Michell Robert W.
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