A method of photoplethysmography analysis and processing based on cluster analysis

A photoplethysmography and volumetric pulse wave technology, applied in medical science, diagnosis, catheter, etc., can solve the problems of the influence of model accuracy and the accuracy of characteristic parameters, and achieve the effect of improving efficiency and accuracy

Active Publication Date: 2022-05-17
XIAN UNIV OF TECH
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Problems solved by technology

When extracting the characteristic parameters of the pulse wave data containing such "distorted" waveforms, the accuracy of the characteristic parameters will be affected, and the accuracy of the subsequent model will also be affected.

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  • A method of photoplethysmography analysis and processing based on cluster analysis
  • A method of photoplethysmography analysis and processing based on cluster analysis
  • A method of photoplethysmography analysis and processing based on cluster analysis

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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] see figure 1 , a kind of photoplethysmography analysis and processing method based on cluster analysis proposed by the present invention comprises the following steps:

[0044] Step 1, based on Lambert-Beer's theorem, use infrared light source to irradiate the fingertips of the human body, collect the optical signal transmitted through the fingertips by the photodetector, and use an analog filter to perform low-pass filtering on the photoplethysmography signal containing high-frequency noise , and the collected photoplethysmogram signal is amplified by the amplifier circuit, and then A / D is converted to it, and then the data is sent to the host computer;

[0045] Step 2, use the FIR digital filter to re-filter the noise brought by the acquisition card, human respiration, jitter, etc. in the volume pulse wave signal, and judge wh...

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Abstract

A method for analyzing and processing photoplethysmography based on cluster analysis, comprising the following steps: 1) collecting a photoplethysmogram signal at a finger end, performing low-pass filtering on the photoplethysmography signal, amplifying it and sending it to a host computer; 2) using The digital filter performs noise filtering processing on the collected signal to obtain a pure pulse wave signal; 3) performs differential processing on the pure photoplethysmography signal to extract its peak and valley points; 4) calculates each of the extracted waveform signals Single cycle k' value and independent pulse pressure index P1, P2; 5) Perform cluster analysis on the k' value and P1, P2 value of each heartbeat cycle extracted from a single acquisition waveform, and extract a representative waveform; 6) Collect characteristic parameters of representative waveforms; by extracting characteristic parameters of representative waveforms, the efficiency and accuracy of modeling are correspondingly improved.

Description

technical field [0001] The invention belongs to the technical field of biological signal processing, in particular to a photoplethysmography analysis and processing method based on cluster analysis. Background technique [0002] When the blood pressure spreads from the heart to the entire circulatory system in the form of waves, the pressure on the blood vessel wall in the internal circulatory system of the human body changes accordingly due to the change in the volume of blood in the blood vessels. Such changes are reflected in the waveform changes of the pulse wave. Therefore, the pulse wave contains a lot of physiological and pathological information. [0003] According to Lambert-Beer's law and light scattering theory, when a certain wavelength of light irradiates a certain substance, its absorbance has a good linear relationship with the concentration of the substance and the optical path, so when the light of a constant wavelength is irradiated on the human body, throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/02A61B5/00
CPCA61B5/02A61B5/7203A61B5/7225A61B5/7257A61B5/7264A61B5/725A61B5/7246
Inventor 陈剑虹刘泽晨郑铱郭亚亚
Owner XIAN UNIV OF TECH
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