Key result
An acoustic fetal heart rate monitor using a linear predictor algorithm demonstrated favorable feasibility for clinical use when compared to ultrasonic nonstress tests.
Why the study?
Does a passive acoustic fetal heart rate monitor accurately detect fetal heart rate compared to an ultrasonic monitor in pregnant women?
Does a passive acoustic fetal heart rate monitor accurately detect fetal heart rate compared to an ultrasonic monitor in pregnant women?
A prototype passive acoustic fetal heart rate monitor using PVDF sensors and linear prediction algorithms demonstrated feasibility and compared favorably to standard ultrasound monitoring during fetal nonstress tests.
Answers are grounded in this paper and cite their sources.
May support acoustic fetal monitoring development; hypothesis-generating and requires validation before clinical use.
Research and development is presented of real time signal processing methodologies for the detection of fetal heart tones within a noise-contaminated signal from a passive acoustic sensor. A linear predictor algorithm is utilized for detection of the heart tone event and additional processing derives heart rate. The linear predictor is adaptively "trained" in a least mean square error sense on generic fetal heart tones recorded from patients. A real time monitor system is described which outputs to a strip chart recorder for plotting the time history of the fetal heart rate. The system is validated in the context of the fetal nonstress test. Comparisons are made with ultrasonic nonstress tests on a series of patients. Comparative data provides favorable indications of the feasibility of the acoustic monitor for clinical use.
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Robert A. Pretlow (2024) studied Fetal monitoring. Acoustic fetal heart rate monitor vs. Ultrasonic nonstress tests was evaluated on Feasibility for clinical use. An acoustic fetal heart rate monitor using a linear predictor algorithm demonstrated favorable feasibility for clinical use when compared to ultrasonic nonstress tests.
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