Fetal Heart Rate Monitoring from Phonocardiograph Signal Using Repetition Frequency of Heart Sounds

Abstract

As a passive, harmless, and low-cost diagnosis tool, fetal heart rate (FHR) monitoring based on fetal phonocardiography (fPCG) signal is alternative to ultrasonographic cardiotocography. Previous fPCG-based methods commonly relied on the time difference of detected heart sound bursts. However, the performance is unavoidable to degrade due to missed heart sounds in very low signal-to-noise ratio environments. This paper proposes a FHR monitoring method using repetition frequency of heart sounds. The proposed method can track time-varying heart rate without both heart sound burst identification and denoising. The average accuracy rate comparison to benchmark is 88.3% as the SNR ranges from −4.4 dB to −26.7 dB.

Comparison of Envelope Detection and Signal Normalization Methods for Foetal Heart Rate Extraction from Foetal Heart Sound

“…This may be due to one of the two tins: 1. the peak detection identifies the peak wrongly or 2. the manual measurement in that area is wrong. The wrong peak detection can be avoided by either validating the detected peaks or by using advanced signal processing techniques such as Wavelet denoising, cyclostationary [13] or single cannel blind source separation [14] to effectively remove the noise so that they don't interfere in peak detection.…”

“…The heart sounds are repetitive in nature, therefore a method which describes tracking these frequency repetition to determine the heart rate and tested in the noisy environment using the simulated data from the physionet is proposed by Tang. et.al [13] Single channel blind source separation uses empirical mode decomposition and Nonnegative matrix factorization to extract the fPCG and the FHR is determined [14]. Though more advanced techniques are being proposed requiring additional computational resources, there is no comparison available in literature on adequacy of these approaches using real clinical data.…”

Model Identifkasi Sinyal Jantung Pertama (S1) dan Sinyal Jantung Kedua (S2) pada Janin

“…Penelitian [3], melakukan pemantauan ketidaknormalan jantung janin melalui detak jantung, Fetal Heart Rate (FHR). Pemantauan ini melacak pengulangan frekuensi bunyi jantung dalam siklus jantung yang berdekatan.…”

Non-Adaptive Methods for Fetal ECG Signal Processing: A Review and Appraisal

“…In Table 1 , we summarize the main information about each of the techniques showed in Figure 2 , such as the technical solution or the limitation of its usage in terms of gestation age. Moreover, Table 1 offers comparison of the most significant benefits and drawbacks of the EFM methods [ 1 , 2 , 4 , 16 , 37 , 38 , 39 ]. The summary implies that NI-fECG is a very promising method.…”