Fetal heart rate counting system using digital signal processing

Details Fetal heart rate counting system using digital signal processing Fetal heart rate counting system using digital signal processing

1988-03-22

1990-01-02

Jaworski, Francis

Surgery

Truss

Pad

A61B 802

Patent

active

048906247

ABSTRACT:
A fetal heart rate counting system which includes a transducer element for transmitting an ultrasound signal into the fetal heart while the fetus is in utero and for receiving a returning Doppler signal frequency shifted by action of the fetal heart. The returning Doppler signal is processed to produce a forward heart movement Doppler signal, a reverse heart movement Doppler signal and the complete Doppler signal, from each of which fetal heart rate data is obtained. A composite fetal heart rate data is then produced from the three processed Doppler signal which is more accurate and complete than the data from any one signal individually.

REFERENCES:
patent: 3934577 (1976-01-01), Roman
patent: 4086917 (1978-05-01), Burks et al.
patent: 4143650 (1979-03-01), Hatke
patent: 4357944 (1982-11-01), Manser et al.
Courtin, E. et al., "A Versatile, Semi-Automatic Fetal Monitor", H P Journal vol. 28 No. 5 pp. 16-23, Jan. 1977.
Takenchi, Y. et al., "An Adaptive Correlation Ratemeter", Ultrasonics May 1978 vol. 16 No. 3.

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