Ultrasonic pulse Doppler blood flow meter

Details Ultrasonic pulse Doppler blood flow meter Ultrasonic pulse Doppler blood flow meter

1983-07-25

1985-09-17

Howell, Kyle L.

Surgery

Truss

Pad

7386125, A61B10100

Patent

active

045414378

ABSTRACT:
An ultrasonic pulse Doppler blood flow meter, wherein an amplitude equalizing circuit is inserted between the high-pass filter provided in the successive stage of the Doppler detector and the Doppler analyzer. The amplitude equalizing circuit not only effectively utilizes the input dynamic range of the Doppler analyzer but also automatically adjusts the cut-off frequency of the high-pass filter in accordance with the input signal. Therefore, a blood flow meter which requires minimal manual adjustment is obtained.

REFERENCES:
patent: 4060763 (1977-12-01), Hassler
patent: 4122713 (1978-10-01), Stasz et al.
patent: 4143650 (1979-03-01), Hathe
patent: 4227407 (1980-10-01), Drost
patent: 4357278 (1981-03-01), Papadofrongakis et al.
patent: 4357944 (1982-11-01), Mauser et al.
patent: 4391148 (1983-07-01), Sainz et al.
patent: 4434669 (1984-03-01), Roberts et al.
Mauser, R., "Cardiotachometer", Europaische Patent on Melding 0 027215, published Oct. 1980.

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