Fetal heart rate counting system using digital signal processing
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United States of America Patent
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Jan 2, 1990
Grant Date -
N/A
app pub date -
Mar 22, 1988
filing date -
Mar 22, 1988
priority date (Note) -
Expired
status (Latency Note)
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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.
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