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Blood pressure measuring method based on characteristic parameter of photoelectricity plethysmography of signal cycle

A technology of photoplethysmography and characteristic parameters, applied in vascular assessment, cardiac catheterization, etc., can solve problems such as blood pressure measurement errors, hypertension patients cannot be detected, arterial blood pressure does not have correlation, etc.

Inactive Publication Date: 2007-09-12
THE CHINESE UNIVERSITY OF HONG KONG
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Problems solved by technology

However, in practical applications, we found that the relationship between the time-domain characteristic parameters of many subjects and arterial blood pressure does not have a good correlation, and some characteristics, such as dicrotic notch, have a negative effect on some hypertensive patients. may not detect at all
However, the pattern matching and recognition of the time-domain waveform of the photoplethysmography signal requires pre-extracting feature patterns and training of the waveform, and the time-domain waveform will also be affected by many uncertain factors, which will bring errors to blood pressure measurement

Method used

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  • Blood pressure measuring method based on characteristic parameter of photoelectricity plethysmography of signal cycle
  • Blood pressure measuring method based on characteristic parameter of photoelectricity plethysmography of signal cycle
  • Blood pressure measuring method based on characteristic parameter of photoelectricity plethysmography of signal cycle

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Embodiment Construction

[0034] The method described in the present invention will be specifically described below with reference to FIGS. 1 to 6 .

[0035]Figure 1 shows the photoplethysmographic signals of the same subject under different arterial blood pressures. The three groups of signals (a), (b) and (c) are respectively when the systolic blood pressure of the subject is 117mmHg, 148mmHg, and 122mmHg Record the photoplethysmographic signal. It can be seen from Fig. 1 that as the blood pressure changes, the waveform characteristics of the photoplethysmography signal will change accordingly, especially the position of the dicrotic notch. When the blood pressure is high, the position of the dicrotic wave will rise, and because it will be close to the peak, the dicrotic wave will become less obvious or even disappear. This indicates that the increase of blood pressure will bring changes in the frequency distribution of the beat waveform of the photoplethysmography signal, and the selection of appro...

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Abstract

The blood pressure measuring process based on photoelectronic volume tracing signal includes the following steps: 1. measuring and recording photoelectronic volume tracing signal essential for blood pressure measurement, and selecting the period domain characteristic parameters based on the signal; 2. calibrating blood pressure measurement and determining the specific blood pressure measuring expression; 3. performing arterial blood pressure measurement based on the period domain characteristic parameters; and 4. controlling and compensating the factors affecting the photoelectronic volume tracing signal for even accurate blood pressure measuring result. The present invention realizes arterial blood pressure measurement with single photoelectronic volume tracing signal.

Description

technical field [0001] The present invention generally relates to a blood pressure measurement method, in particular to a blood pressure measurement method based on a characteristic parameter in a period domain of a photoplethysmography signal. Background technique [0002] With the increasing incidence of hypertension, sphygmomanometers have entered people's lives and become one of the indispensable household appliances, bringing convenience to early detection of hypertension and monitoring of treatment effects. Blood pressure is formed by the contraction force and blood output of the heart, the elasticity of the arterial wall and the resistance of the small arteries in the whole body. It is the driving force for the continuous flow of blood in the arteries. Measuring blood pressure can help you understand the condition of the cardiovascular system. Especially for patients with hypertension, they should have a sphygmomanometer and measure it frequently every day, so as to g...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/022
Inventor 张元亭颜永生
Owner THE CHINESE UNIVERSITY OF HONG KONG
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