Doppler flow velocity meter

Surgery – Truss – Pad

Patent

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Details

7386125, A61B 806

Patent

active

050465007

ABSTRACT:
A Doppler measuring device for measuring the flow velocity of a fluid which carries particles which reflect ultrasonic waves is described. The device includes an ultrasonic transducer for insonating the fluid with ultrasonic wave pulses in response to corresponding transmit pulses supplied to the transducer at a predetermined pulse repetition rate. A transmitter connected to a transducer and adapted to produce transmission pulses which excite the transducer to deliver the ultrasonic wave pulses is present. The device also includes a receiver connected to the transducer to receive and process echo signals corresponding to at least two groups of echo waves reflected by particles in the fluid, and an evaluator connected to the output of the receiver to derive from the Doppler information obtained by the receiver an output signal corresponding to the flow velocity.

REFERENCES:
patent: 3914999 (1975-10-01), Grandchamp
patent: 4216537 (1980-08-01), Delignieres
patent: 4270191 (1981-05-01), Peynaud
patent: 4334543 (1982-06-01), Fehr
patent: 4434669 (1984-03-01), Roberts et al.
patent: 4534357 (1985-08-01), Powers
patent: 4780837 (1988-10-01), Namekawa

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