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A heart sound signal quantification analysis method and device

A quantitative analysis and heart sound technology, applied in medical science, auscultation equipment, diagnosis, etc., can solve problems such as increased difficulty of research, unsimplified system structure, and singleness

Active Publication Date: 2011-12-21
XIHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, due to the wide application of computer technology, modern digital signal processing technology, pattern recognition, etc., the research on intelligent heart disease diagnosis system based on heart sound signals has become a research hotspot in foreign countries. A series of in-depth studies have been carried out, but a large number of classifiers such as artificial neural networks and support vector machines are used to classify single cardiac murmurs, and the system structure is not simple enough.
[0004] In addition, when using a classifier to analyze heart sound signals, a large number of training samples are needed to improve the diagnostic accuracy of heart diseases, but clinically heart diseases are mostly mixed diseases, and a large number of completely similar mixed heart disease data collection makes The difficulty of research is greatly increased

Method used

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  • A heart sound signal quantification analysis method and device

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Experimental program
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Embodiment 1

[0066] figure 1 A schematic flowchart of a method for quantifying and analyzing heart sound signals is provided for the embodiment of the present application.

[0067] Such as figure 1 As shown, the method includes:

[0068] Step S101: collecting heart sound signals from a plurality of auscultation sites.

[0069] In the embodiment of the present application, four auscultation sites are selected, namely: the auscultation positions corresponding to the aortic valve, pulmonary valve, mitral valve and tricuspid valve, and when collecting the heart sound signals of each part, a multi-conductor is selected. The synchronous heart sound collection device simultaneously collects the heart sound signals at the above four auscultation positions.

[0070] Using a multi-channel synchronous heart sound acquisition device to collect heart sound signals can not only eliminate the time difference of heart sound collection in various parts, enhance the data contrast under the same condition...

Embodiment 2

[0095] The above-mentioned embodiment 1 can obtain the intensity of the normal heart sound of a certain patient, the time and intensity of the murmur. Clinically, the doctor can make a preliminary diagnosis of the patient based on these data, but the diagnosis process needs to rely on the experience of the doctor. . In order to reduce the dependence on doctors during auscultation, and to obtain more detailed auscultation results through the analysis of heart sound signals, the embodiment of the present application also provides another quantitative analysis method for heart sound signals. The patient's heart sound energy parameters are used as an index system for auscultation, and the heart sound energy obtained in Example 1 is compared with a large number of heart sound energy parameters in the database, so that detailed auscultation results of the patient can be obtained.

[0096] Image 6 It is a schematic flowchart of another heart sound signal quantitative analysis metho...

Embodiment 3

[0109] Corresponding to the heart sound signal quantitative analysis method provided in the first embodiment above, the embodiment of the present application also provides a heart sound signal quantitative analysis device, such as Figure 9 shown, the device includes

[0110] The multi-channel synchronous heart sound collection device 1 is used to collect heart sound signals from multiple auscultation positions.

[0111] The preprocessing unit 2 is used for preprocessing the multiple collected heart sound signals respectively.

[0112] In the embodiment of this application, as Figure 10 As shown, the preprocessing unit 2 includes: a band-pass filtering unit 21, which adopts band-pass filtering to remove external low-frequency noise and high-frequency interference in the heart sound signal; a noise reduction unit 22, which adopts wavelet threshold denoising method to filter the heart sound after band-pass filtering. The signal is denoised; the normalization processing unit 2...

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Abstract

The invention discloses a method and a device for quantitatively analyzing heart sound signals. The method comprises the following steps of: acquiring multiple heart sound signals at clinical auscultation positions; preprocessing the acquired multiple heart sound signals; extracting heart sound envelope curves and characteristic parameters of the preprocessed multiple heart sound signals respectively; dividing a systole period in a cardiac cycle of each heart sound signal into a first heart sound period and a systolic murmur period, dividing a diastole period into a second heart sound period and a diastolic murmur period, and computing heart sound energy in all periods respectively; and computing the percentage of the heart sound energy in all the periods in the whole cycle to determine the intensity of normal heart sound and the emergent time and intensity of murmurs. By the method for quantitatively analyzing the heart sound signals, the intensity, the emergent time and the duration time of all components of heart sound can be quantitatively analyzed, and an analysis result can be used as a diagnosis basis for clinical common cardiovascular diseases; and the method and the device are used for evaluating the relationship between cardiac murmur types and the cardiovascular diseases.

Description

technical field [0001] The present application relates to the technical field of medical equipment, in particular to a method and device for quantitative analysis of heart sound signals. Background technique [0002] Heart sound is a compound sound produced by the opening and closing of heart valves, the relaxation and contraction of tendons and muscles, the impact of blood flow and the vibration of the cardiovascular wall. It contains a large amount of pathological information about the functional status of various parts of the heart, such as the atrium, ventricle, great vessels, cardiovascular system and various valves, and is the most basic parameter for clinical evaluation of the functional status of the heart. Before the cardiovascular disease has developed enough to produce clinical and pathological changes (such as changes in the electrocardiogram), murmurs and distortions in heart sounds are important diagnostic information. Therefore, heart sounds have important cl...

Claims

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Application Information

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IPC IPC(8): A61B7/00
Inventor 王海滨刘锦群刘武昌陶婷邬晓臣房玉马杨林张琼敏
Owner XIHUA UNIV
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