Multi-lead fetal electrocardiogram extraction device based on factor synchronism analysis

Abstract

The invention discloses a multi-lead fetal electrocardiogram extraction device based on factor synchronism analysis, and belongs to the field of electrocardiogram signal recognition. The method comprises the following steps: firstly, synchronously recording abdomen and chest multi-lead electrocardio mixed signals of a pregnant woman through an electrocardio testing system, and finishing preprocessing; inputting the chest multi-lead electrocardio mixed signal into a principal component analysis module to complete principal component decomposition; then, taking a principal component of chest guide decomposition as a reference signal, respectively calculating phase synchronization values between each factor of abdomen decomposition and the reference signal, sorting the phase synchronization values, and carrying out classified screening and eliminating mother electrocardio factors in combination with mother and fetus electrocardio frequency and waveform characteristics; using empirical mode decomposition to eliminate non-fetal electrocardio components to perfect local features of fetal electrocardio and reconstruct fetal electrocardio factors; and finally, reconstructing a clear fetal electrocardiosignal by using inverse operation of factor analysis. Compared with the prior art, the fetal electrocardiosignal extracted by the device has more fetal electrocardiosignal local features, the signal is smoother, and the device is of great significance to fetal electrocardiosignal and perinatal medical research.

Description

technical field [0001] The invention belongs to the field of electrocardiographic signal identification, in particular to a device for analyzing fetal electrocardiogram extraction based on factor phase synchronization. Background technique [0002] Fetal Electrocardiogram (FECG) is a physiological signal generated by fetal heart activity, which can reflect the real growth and health of the perinatal fetus in pregnant women, and is also an important indicator for pregnant women in prenatal checkups. However, because the fetus is located in the mother's body during the perinatal period, it brings great difficulties to the detection and study of FECG. At present, there are two main ways to detect fetal ECG: one is invasive and invasive fetal scalp electrode method, although this method can obtain relatively clean FECG, it will cause certain damage to mother and fetus; the other is non-invasive A non-invasive abdominal electrode method, that is, electrodes are arranged at diffe...

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Problems solved by technology

Although these methods can extract fetal ECG signals to a certain extent, the obtained signals are either too strict in data collection and have low accuracy, or the extraction or calculation process is too complicated to realize, or requires more manual intervention, etc., which leads to various The applicability of similar methods is limited, so there is still no particularly suitable method for non-invasive fetal ECG extraction.

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