Technology for recording and processing sound signal and electric signal of heart of fetus

An electrocardiographic signal and signal technology, which is applied to the acquisition and processing of human biological signals, can solve problems such as reduced versatility, patient discomfort, and inaccuracy, and achieve the effects of accurate and reliable signals, accurate results, and simple operation.

Inactive Publication Date: 2009-10-14
唐业忠
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AI Technical Summary

Problems solved by technology

Collecting the maternal ECG reference signal requires placing one or several electrodes near the maternal heart, which brings discomfort to the patient
And more importantly, the maternal ECG signal collected near the heart is very different from the maternal ECG signal collected in the abdomen, which makes the implementation of the above technique difficult and imprecise
In addition, the location of the reference electrode has a great influence on the output results. This method of collecting the reference signal and the signal to be detected in different regions reduces the versatility of the above technology.

Method used

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  • Technology for recording and processing sound signal and electric signal of heart of fetus
  • Technology for recording and processing sound signal and electric signal of heart of fetus
  • Technology for recording and processing sound signal and electric signal of heart of fetus

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Embodiment Construction

[0010] During sampling, the user holds the acoustic-electric sensor and places it at the sampling site, that is, the abdomen of the pregnant woman. Touch and hold your finger against the reference electrode on the neck of the funnel. To improve conductivity, clean abdomen and fingers before use, and apply a small amount of conductive gel if necessary. Acoustoelectric sensors input the collected signals to processors or computers through acoustic-electric conversion. The channel 1 is given the signal converted from the heart sound, and the other channels (2-7) are given the electrocardiographic signal. After A / D conversion, the signal of channel 1 (namely, the heart sound signal) is filtered, and then FFT transformation and LPC modeling are carried out. Where strong signals appear above 1 kHz, 400-600 Hz and 650-850 Hz, and weak signals appear at 220-400 Hz, it may be a heart sound signal (see appendix figure 2 7). Extract the parameters of an LPC model matching these featu...

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Abstract

The invention relates to a technology for picking up and processing a sound signal and an electric signal (QRS waves) of the heart of a fetus, which comprises an acoustoelectric sensor and a signal processing method which is a self learning system using the synchronization of the sound signal and the electric signal as a target. The system acquires an ability to identify the sound signal of the heart of the fetus and mixed QRS waves of the mother and the fetus by learning. When the technology is carried out, and the sound signal and the electric signal synchronously appear, an operator determines the current QRS is the electric signal of the heart of the fetus, and a bigger weight is multiplied; if only the QRS exists without being followed by the sound signal of the heart, the operator determines the current QRS is the electric signal of the heart of the mother, and a smaller weight is multiplied.

Description

technical field [0001] The invention is a method for collecting and processing human biological signals, which involves the extraction, filtering, transformation, feature value extraction, synchronous comparison, weight assignment and execution of fetal heart sound signals and electrical signals. Background technique [0002] Human embryos begin to pace the heart from the fifth week, that is, the generation of electrocardiographic signals. Heart sounds can be detected at the tenth week. Fetal heart sounds are used in the diagnosis of heart valve disease. Fetal ECG signals have extremely important clinical significance and are widely used to monitor the nutritional status, emotional status, organ development status and cardiovascular diseases of the fetus. [0003] The heart sound signal and electrocardiographic signal of the fetus are submerged in the noise background of the mother's body, so the signal collected from the mother's womb is a mixed signal of mother and child...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B19/00A61B7/00A61B5/0472A61B5/366
Inventor 唐业忠
Owner 唐业忠
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