Key result
The proposed fetal heart rate calculation system achieved over 98% accuracy on simulator data and produced FHR values within 1 bpm of the Monica AN24 system on clinical data.
Why the study?
Fetal electrocardiogram can be obtained non-invasively to monitor fetal growth status, but systems are needed to calculate fetal heart rate from abdominal ECG signals.
Does the proposed fetal heart rate calculation system accurately measure fetal heart rate compared to standard simulators and Monica AN24?
Does the proposed fetal heart rate calculation system accurately measure fetal heart rate compared to standard simulators and Monica AN24?
The proposed non-invasive fetal heart rate calculation system based on R-R interval is highly accurate and comparable to existing commercial devices.
May accelerate affordable fetal monitoring development; leaves open need for prospective clinical validation.
BACKGROUND: Fetal electrocardiogram (FECG) can be obtained in a non-invasive manner to monitor fetal growth status. OBJECTIVE: In this study, a fetal heart rate (FHR) calculation system was proposed, which consists of the FECG recorder (MF-HOLTER) and the FECG monitoring software (FECG-MS). The abdomen electrocardiogram (AECG) of pregnant woman is acquired through the MF-HOLTER. The FECG-MS packs the AECG data and calls the FECG separation algorithm to obtain the separated FECG and the fetal QRS (FQRS) position. The FHR is further obtained by calculating the R-R interval value. At the same time, this study proposed a FQRS position correction algorithm to calculate the correct FHR values. METHOD: In order to verify the accuracy of the FHR calculation, the ECG signal of FLUKE's PS320 FETAL SIMULATOR and clinical data were simultaneously tested. RESULTS: The accuracy rate is over 98% in processing the simulator's data. In processing clinical data, the FHR values obtained by both the system proposed in this study and Monica AN24 are very close, and the difference is less than 1 bpm. CONCLUSION: The results show that the FHR calculation system is accurate and stable, and has a positive application value and prospect.
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Zhang et al. (2020) studied Fetal monitoring. Fetal heart rate calculation system (MF-HOLTER and FECG-MS) vs. Monica AN24 and FLUKE PS320 FETAL SIMULATOR was evaluated on Accuracy of fetal heart rate calculation. The proposed fetal heart rate calculation system achieved over 98% accuracy on simulator data and produced FHR values within 1 bpm of the Monica AN24 system on clinical data.
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