Key result
Abdominal ECG fetal monitoring matches Doppler ultrasound with an average ~5% difference in heart rate detection.
Why the study?
A fetal monitor based on maternal abdominal electrocardiogram was developed and its accuracy compared to Doppler ultrasound for fetal heart rate detection.
Does a maternal abdominal ECG-based fetal monitor accurately detect fetal heart rate compared to Doppler ultrasound in low-risk pregnancies?
Cross-Sectional (n=5)
Does a maternal abdominal ECG-based fetal monitor accurately detect fetal heart rate compared to Doppler ultrasound in low-risk pregnancies?
A newly developed abdominal ECG-based fetal monitor demonstrates reasonable accuracy for fetal heart rate detection compared to standard Doppler ultrasound.
Answers are grounded in this paper and cite their sources.
Ambulatory fetal monitoring via abdominal ECG appears feasible in low-risk late pregnancy; leaves open validation during labor and in larger cohorts.
A fetal monitor has been developed for the measurement of the fetal and maternal heart rates from maternal abdominal electrocardiogram during pregnancy and labor for ambulatory monitoring. Developed algorithm of the fetal monitor is based on digital filtering, adaptive thresholding. statistical properties in the time domain and differencing of local maxima and minima. Five volunteers with low risk pregnancies, between 35 to 40 weeks of gestation and no evidence of labor, were studied for the fetal heart rate detection. A Doppler ultrasound fetal monitor was used to compare the accuracy of the measurement system. Results showed an average percent rms difference (PRD) of 5.32% in comparison with the reference ultrasound method. The fetal heart rates curve remained inside a +/- 5 beats/min limit relative to the reference ultrasound method for 84.1% of the time.
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Zahedi et al. (2001) conducted a cross-sectional in Pregnancy (n=5). Abdominal electrocardiogram (ECG) fetal monitor vs. Doppler ultrasound fetal monitor was evaluated on Fetal heart rate detection accuracy (percent rms difference). An abdominal ECG fetal monitor demonstrated an average percent root-mean-square difference of 5.32% compared to Doppler ultrasound for fetal heart rate detection.
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