Fetus electrocardiosignal extracting method and device
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A technology of ECG signal and extraction method, which is applied in medical science, sensors, diagnostic recording/measurement, etc., and can solve problems such as limited scope of use and limited application
Active Publication Date: 2016-06-08
深圳市国创汇康医疗器械科技有限公司
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[0008] The embodiment of the present invention provides a method and device for extracting fetal ECG signals, aiming to solve the problem that the input t...
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Embodiment 1
[0045] figure 1 The implementation process of the fetal electrocardiogram signal extraction method provided by the second embodiment of the present invention is shown, and the details are as follows:
[0046] In step S101, a single-channel abdominal ECG signal obtained by monitoring abdominal wall electrodes of a mother is received.
[0047] In step S102, the peak position of maternal ECG R wave in the abdominal wall ECG signal is extracted.
[0048] In this embodiment, the extraction of the maternal ECG R-wave peak position in the abdominal wall ECG signal specifically includes:
[0049] Step S11, performing a differential operation on the abdominal wall ECG signal to obtain a slope curve of the abdominal wall ECG signal;
[0050] Step S12, perform an absolute sliding integral operation on the slope curve, record the maximum value in each second, average the maximum value in the previous M seconds to obtain the average value of the maximum value, and obtain the R wave deter...
Embodiment 2
[0072] Figure 6 A specific structural block diagram of the fetal electrocardiogram signal extraction device provided by Embodiment 2 of the present invention is shown, and for convenience of description, only parts related to the embodiment of the present invention are shown. In this embodiment, the fetal ECG signal extraction device includes: a signal receiving unit 61, a peak extraction unit 62, a recursive template generation unit 63, and a fetal heart signal acquisition unit 64, and the peak extraction unit 62 includes: a signal difference module , a threshold acquisition module and a peak search module.
[0073] Wherein, the signal receiving unit 61 is used to receive the single-channel abdominal wall ECG signal obtained by monitoring the abdominal wall of the mother with the abdominal wall electrodes;
[0074] A peak extraction unit 62, configured to extract the position of the maternal ECG R-wave peak in the abdominal wall ECG signal;
[0075] The recursive template ...
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Abstract
The invention belongs to the technical field of electrocardiogram monitoring, and provides a fetus electrocardiosignal extracting method and device. The method includes the steps that one-way abdominal wall electrocardiosignals obtained from parent body abdominal wall monitoring of an abdominal wall electrode are received; a parent body electrocardio R wave crest position in the abdominal wall electrocardiosignals is extracted; N left and right sections, with the preset length, of the R wave crest position are intercepted and averaged to obtain an average waveform template, the average waveform template and a current waveform module are superposed to generate a recursion waveform template, and N is a positive integer larger than or equal to 5; the recursion waveform template is used as reference signals, and fetus electrocardiosignals are obtained from the abdominal wall electrocardiosignals through a self-adaptive filtering algorithm. As the recursion waveform template superposing is conducted on the abdominal wall electrocardiosignals to generate reference signals of a self-adaptive filter, and self-adaptive fetus electrocardiosignal separation is achieved under a single lead system.
Description
technical field [0001] The invention belongs to the technical field of electrocardiogram monitoring, and in particular relates to a method and a device for extracting fetal electrocardiogram signals. Background technique [0002] During the perinatal period, especially during the delivery process, the fetus may suffer from temporary hypoxia due to umbilical cord compression or other reasons, causing asphyxia, mental retardation, dementia and even death, which is related to the lack of adequate and effective fetal monitoring during the perinatal period. To realize fetal heart monitoring, it is necessary to obtain signals that reflect the health status of the fetus, such as fetal heart rate monitoring. There are usually three types of signals that reflect fetal heart function, namely heart sound, heartbeat and electrocardiographic signal. Among them, fetal electrocardiographic signal is one of the effective means to monitor the health status of the fetus, and has been valued b...
Claims
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