Acquisition method for medical index data of heart sound signal

A technology for acquiring methods and index data, applied in the field of medical testing, can solve the problems of weak anti-interference ability and low accuracy, and achieve high accuracy and improve accuracy.

Active Publication Date: 2019-11-22
BEIJING BLUE SATELLITE COMM TECH
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Although easy to implement, the accuracy is not hi

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  • Acquisition method for medical index data of heart sound signal
  • Acquisition method for medical index data of heart sound signal
  • Acquisition method for medical index data of heart sound signal

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Embodiment Construction

[0037] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0038] figure 1 It is a flow chart of a specific embodiment of the method for obtaining medical index data of heart sound signals in the present invention.

[0039] In this example, if figure 1 Said, the acquisition method of heart sound signal medical index data of the present invention comprises the following steps:

[0040] 1. Heart sound signal acquisition and preprocessing S1

[0041] First use an electronic stethoscope at a sampling frequency F s Collect human heart sound signals to obtain discrete heart sound signals x 0 (n), then for the collected discrete hear...

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Abstract

The invention discloses an acquisition method for medical index data of a heart sound signal. Dual-threshold limit is used for heart sound signal segmentation, the problem of poor anti-interference capacity of single-threshold segmentation is solved, the accuracy of heart sound signal segmentation is improved, and the guarantee is provided for accurately extracting the medical index data of the heart sound signal in the later period. Meanwhile, the collected heart sound signal is subjected to spike signal elimination before segmentation, and by taking the logarithm, a linear low pass filter isused for conducting lowpass filtering to obtain an extremely smooth heart sound signal envelope, which is very beneficial to heart sound signal segmentation and determination of various components inheart sound. Finally, according to heart sound signal segmentation, first heart sound and second heart sound of the heart sound signal, duration of a contraction period and duration of a contractionperiod are obtained, and according to the duration, various kinds of medical index data of the heart sound signal can be extracted and used for following diagnosis.

Description

technical field [0001] The invention belongs to the technical field of medical testing, in particular, relates to a method for acquiring medical index data of heart sound signals. Background technique [0002] The heart sound signal is the sound signal generated by the regular mechanical vibration of the heart and transmitted to the surface of the human skin through the cardiothoracic conduction system. Auscultation of heart sound signals (referred to as heart sound auscultation) can diagnose whether there are some abnormalities in the heart. It can detect heart problems earlier than ECG, so as to grasp the opportunity of early treatment. At the same time, heart sound auscultation is convenient, non-invasive, and economical, so heart sound auscultation plays a very important role in clinical diagnosis. [0003] However, traditional heart sound auscultation also has certain limitations. The accuracy of diagnosis often depends on the medical knowledge and experience of the au...

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Application Information

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IPC IPC(8): G16H50/20G16H50/30G16H10/60G06K9/00A61B7/00
CPCG16H50/20G16H50/30G16H10/60A61B7/00G06V2201/03G06F2218/16G06F2218/02G06F2218/08
Inventor 兰峰
Owner BEIJING BLUE SATELLITE COMM TECH
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