A discriminative method for time domain sparsity linear aliasing blind separation model of fetal heart rate detection

A discrimination method and fetal ECG technology, applied in the directions of diagnostic recording/measurement, medical science, sensors, etc., can solve the problems of dissatisfaction, isolation, poor electrical conductivity, etc. Effect

Inactive Publication Date: 2011-11-30
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

In addition, the vernix covered by the fetal skin is a fat layer, which has poor electrical conductivity and has an isolation effect.
There are two layers of fetal membranes outside the vernix, and the electrical conductivity is also poor. Th...

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  • A discriminative method for time domain sparsity linear aliasing blind separation model of fetal heart rate detection
  • A discriminative method for time domain sparsity linear aliasing blind separation model of fetal heart rate detection
  • A discriminative method for time domain sparsity linear aliasing blind separation model of fetal heart rate detection

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[0042] Such as figure 1 As shown, the discriminant method of the time-domain sparsity linear aliasing blind separation model of fetal electrocardiogram detection of the present invention comprises the following steps:

[0043] (1) collecting multi-channel mother and fetal ECG mixed observation signals in the mother's abdomen;

[0044] (2) Preprocessing the collected signals, including eliminating baseline drift, filtering out 50Hz power frequency interference and other high-frequency noise interference, to obtain observation signals with only mother's ECG signal and fetal ECG signal;

[0045] (3) The threshold-based method first identifies the positions of the maternal ECG R-wave and the fetal ECG R-wave respectively, and then respectively determines the positions of the maternal ECG complex wave and the fetal ECG complex wave in the observation signal;

[0046] (4) According to the positions of the maternal ECG complex wave and the fetal ECG complex wave determined in step (...

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Abstract

The invention provides a time-domain sparsity linear aliasing blind separation model discrimination method in fetal electrocardiogram detection, which mainly comprises the following steps: acquiring multiple mother/fetal electrocardiogram aliasing mixed signals from a mother belly; obtaining the position of mother electrocardiogram R wave and the mother electrocardiogram PQRS (Physician Quality Reporting System) wave range from the mixed source signals by using a threshold limitation method; obtaining the position of fetal electrocardiogram R wave and fetal electrocardiogram PQRS wave range by using threshold limitation and wave width limitation methods; judging aliasing between the mother electrocardiogram PQRS wave range and the fetal electrocardiogram PQRS wave range, thereby finding out the time period without aliasing and obtaining the electrocardiogram mixed signal sparse region; and measuring the aliasing linearity in the sparse region by calculating the correlation of the two acquired signals. The method has the advantage of simple structure, is easy to implement, and solves the problem of discrimination of the linear aliasing blind separation model based on source signal time-domain relative sparsity.

Description

technical field [0001] The invention belongs to the technical field of fetal electrocardiogram detection, in particular to a discrimination method for a time-domain sparse linear aliasing blind separation model of fetal electrocardiogram detection. Background technique [0002] With the advancement of science and technology and the improvement of people's living standards, in today's clinical medical field, the demand for effective monitoring of fetal conditions in the mother's body is becoming more and more strong. What followed was the emergence of various methods of fetal monitoring. At present, the clinical monitoring methods for fetal status in the mother mainly include ultrasonic electronic monitoring and fetal ECG monitoring. Among them, Doppler ultrasonic electronic monitoring is currently the most widely used monitoring method, but this method requires the instrument to actively send ultrasonic signals to act on Fetus determines the growth and development status of...

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Application Information

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IPC IPC(8): A61B5/0444A61B5/0452A61B5/344
Inventor 蔡坤王雷谢胜利傅予力
Owner SOUTH CHINA UNIV OF TECH
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