Method for detecting pulmonary artery blood pressure by using heart sound analysis method of multilayer feedforward network

A feedforward network, pulmonary artery technology, applied in cardiac catheterization, vascular evaluation, etc., can solve problems such as difficulty in pulmonary artery blood pressure detection, and achieve the effects of accurate heart sound signal characteristics, simplified measurement procedures, and accurate measurement results.

Inactive Publication Date: 2012-02-01
THE HONG KONG POLYTECHNIC UNIV
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a non-invasive, risk-free, low-cost, simple and convenient detection method for pulmonary arterial blood pressure in view of the above-mentioned defects in the prior art that the detection of pulmonary arterial blood pressure is difficult

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  • Method for detecting pulmonary artery blood pressure by using heart sound analysis method of multilayer feedforward network
  • Method for detecting pulmonary artery blood pressure by using heart sound analysis method of multilayer feedforward network
  • Method for detecting pulmonary artery blood pressure by using heart sound analysis method of multilayer feedforward network

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Embodiment Construction

[0021] exist figure 1 A schematic flow chart of the first preferred embodiment of the method for detecting pulmonary artery blood pressure using the heart sound analysis method of the multi-layer feed-forward network of the present invention is shown in . The method starts at step 101, and then proceeds to step 102 to extract the heart sound signal, and the heart sound signal recorded by the electronic stethoscope is extracted and stored in wav.file format for subsequent signal feature analysis. The extracted heart sound signal is as Figure 4 shown. After step 102, step 103 is performed to preprocess the heart sound signal to obtain the characteristics of the heart sound signal. After step 103, step 104 is performed to filter the characteristics of the heart sound signal. The filtered heart sound signal features are more obvious and the amount of data is smaller, which is convenient for artificial neural network learning and recognition. After step 104, go to step 105, usi...

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Abstract

The invention relates to a method for detecting the pulmonary artery blood pressure by using a heart sound analysis method of a multilayer feedforward network. The method comprises the steps of: extracting a heart sound signal; preprocessing the heart sound signal by fast Fourier transform and normalized average Shannon energy distribution to obtain heart sound signal features; filtering the heart sound signal features by using a principal component analysis method; and performing training learning on the filtered hear sound signal features by using a perceptron neural network or a multilayer perceptron feedforward neural network to obtain an optimal neural network between the heart sound signal features and a pulmonary artery blood pressure value. The heart sound signal features are signal features of a first heart sound and a second heart sound; the heart sound signal features comprise crest frequency, average frequency, crest amplitude, average amplitude, duration and time interface of heart sounds. By adopting the method for detecting the pulmonary artery blood pressure by using the heart sound analysis method of the multilayer feedforward network, provided by the invention, the pulmonary artery blood pressure can be easily and conveniently detected at low cost in a non-intrusive and no risk manner.

Description

technical field [0001] The invention relates to a method for detecting pulmonary artery blood pressure, more specifically, to a method for detecting pulmonary artery blood pressure using a heart sound analysis method. Background technique [0002] Pulmonary hypertension was defined as a mean pulmonary artery pressure in the capillaries of the lungs above 25 mmHg or a left arterial pressure below 15 mmHg. Pulmonary hypertension is generally triggered by previous disease and is an incurable chronic disease with a prevalence between 9% and 63%. The 5-year survival rate is only between 47% and 55%. Pulmonary hypertension is generally difficult to predict in advance because it is difficult to detect pulmonary arterial blood pressure. Right heart catheterization is currently the only gold standard for detecting pulmonary arterial blood pressure, but as a Invasive intervention testing has certain risks and may even cause fatal complications. Doppler echocardiography is the most e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/021
Inventor 钟慧仪汪国成陈静涵
Owner THE HONG KONG POLYTECHNIC UNIV
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