Non-invasive blood pressure extraction method and system

A non-invasive, extraction method technology, applied in the field of non-invasive blood pressure extraction methods and systems, can solve the problems of large errors and low accuracy.

Pending Publication Date: 2021-11-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a non-invasive blood pressure extraction method and system, which are used to solve the technical problems of large errors and low accuracy in the existing non-invasive blood pressure extraction methods

Method used

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  • Non-invasive blood pressure extraction method and system
  • Non-invasive blood pressure extraction method and system
  • Non-invasive blood pressure extraction method and system

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Experimental program
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Effect test

Embodiment 1

[0045] For ease of understanding, see figure 1 , an embodiment of a non-invasive blood pressure extraction method provided by the present invention, comprising:

[0046] Step 101, synchronously collect the PPG signal and ECG signal of the subject through the PPG signal collection device and the ECG signal collection device on the smart bracelet.

[0047] In the present invention, firstly, the PPG signal and the ECG signal of the person under test are synchronously collected through the smart bracelet having the functions of PPG signal collection and ECG signal collection.

[0048] Step 102, calculating the number of periods of the PPG signal, and combining the PPG signals of the preset number of periods.

[0049] For the PPG signal, calculate the number of cycles within a preset duration (for example, 5s), and combine the periodic PPG signals within this duration as the research object.

[0050] Step 103, perform fast Fourier transform on the periodically combined PPG signal...

Embodiment 2

[0071] see figure 2 , the present invention provides another embodiment of a non-invasive blood pressure extraction method, including:

[0072] Step 201, synchronously collect the PPG signal and ECG signal of the subject through the PPG signal collection device and the ECG signal collection device on the smart bracelet.

[0073] Step 201 in this embodiment is consistent with step 101 in Embodiment 1, and will not be repeated here.

[0074] Step 202: Input the PPG signal into the FIR filter for filtering, and filter out the dicrotic peak high frequency component of the PPG signal.

[0075] Step 203, calculating the number of periods of the PPG signal, and combining the PPG signals of the preset number of periods.

[0076] Step 204: Perform fast Fourier transform on the periodically combined PPG signal to obtain spectrum amplitude information and phase information of the PPG signal.

[0077] Carrying out discrete Fourier transform to the PPG signal can find that the frequenc...

Embodiment 3

[0088] The present invention provides an embodiment of a non-invasive blood pressure extraction system, including:

[0089] The signal acquisition module is used to synchronously acquire the PPG signal and ECG signal of the subject through the PPG signal acquisition device and the ECG signal acquisition device on the smart bracelet;

[0090] The signal period processing module is used to calculate the number of periods of the PPG signal, and merge the PPG signals of the preset number of periods;

[0091] The signal conversion module is used to carry out fast Fourier transform to the PPG signal after the periodic combination, to obtain the spectrum amplitude information and phase information of the PPG signal;

[0092] The PAT calculation module is used to calculate the pulse wave arrival time PAT according to the PPG signal and the ECG signal, wherein, PAT=ECG peak -PPG D-max , ECG peak is the time point corresponding to the peak value of the ECG signal positioned through t...

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Abstract

The invention discloses a non-invasive blood pressure extraction method and system. The method comprises the steps of taking a single-cycle PPG signal formed by combining a plurality of cycle PPG signals as a research object, and carrying out the frequency decomposition of the single-cycle PPG signal through the fast Fourier transform extracted according to a time axis. The problem of researching the relationship between different PPG signals and blood pressure is converted into the problem of researching the relationship between the frequency spectrum amplitude and phase of PPG signal waveforms and the blood pressure, and the time interval between an ECG signal peak value and a point with the maximum gradient of a PPG signal rising edge is defined as the pulse wave arrival time PAT. The pulse wave arrival time PAT and the PPG signal frequency spectrum amplitude and phase can completely represent the body characteristics of a testee, the pulse wave arrival time PAT and the PPG signal frequency spectrum amplitude and phase serve as the input of a Stacking model to train the Stacking model, then the trained Stacking model is used for blood pressure prediction, accurate judgment of the blood pressure can be achieved, and the technical problems that an existing non-invasive blood pressure extraction method is large in error and low in accuracy are solved.

Description

technical field [0001] The invention relates to the technical field of blood pressure detection, in particular to a non-invasive blood pressure extraction method and system. Background technique [0002] Blood pressure is an important physiological parameter that reflects the function of the human circulatory system. It can indirectly map the pumping function of the heart, peripheral vascular resistance, heart rate, arterial elasticity, blood volume in the whole body, and the physical state of blood. Hypertension is the most common one. It is also a chronic disease that involves a wide range of age groups, and it is the most important risk factor for cardiovascular and cerebrovascular diseases. It is a major complication such as stroke, myocardial infarction, and heart failure, and has a high disability and mortality rate. Therefore, it is of great significance to monitor human blood pressure. [0003] The existing blood pressure measurement methods are divided into two met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/021A61B5/318A61B5/00
CPCA61B5/02125A61B5/318A61B5/02416A61B5/02438A61B5/681A61B5/7235A61B5/7203A61B5/725A61B5/7257
Inventor 王峰陈雅清黄诗茜刘梅刘怡俊林泳志王冰丹桂雨
Owner GUANGDONG UNIV OF TECH
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