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Photoplethysmography based noninvasive continuous blood pressure measurement method

A technology of photoplethysmography and volumetric pulse wave, which is applied in vascular assessment, diagnostic signal processing, cardiac catheterization, etc., can solve problems such as errors, complex measurement operations, and poor linear correlation of human diastolic blood pressure, achieving high accuracy of results, Reduce the difficulty of signal acquisition and realize the effect of continuous blood pressure monitoring

Inactive Publication Date: 2017-09-15
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

These two methods can be collectively classified as a two-point measurement method. The measurement process involves multiple parts of the human body, the measurement operation is complicated, and it is easy to be affected by the measurement position and cause errors.
In addition, the pulse wave transit time has a linear relationship with the systolic blood pressure of the human body, and the linear correlation with the diastolic blood pressure of the human body is not good, so the diastolic blood pressure of the human body cannot be measured well by the pulse wave transit time

Method used

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  • Photoplethysmography based noninvasive continuous blood pressure measurement method
  • Photoplethysmography based noninvasive continuous blood pressure measurement method
  • Photoplethysmography based noninvasive continuous blood pressure measurement method

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Embodiment 1

[0025] This embodiment provides a non-invasive continuous blood pressure measurement method based on photoplethysmography, which can obtain the systolic blood pressure and diastolic blood pressure of the human body through the photoplethysmography wave, so as to obtain blood pressure measurement results in a non-invasive, convenient, accurate and continuous manner .

[0026] The non-invasive continuous blood pressure measurement method in this embodiment includes the following steps:

[0027] Step 1, collecting the volume pulse wave of the measurement object, after processing, obtaining the digital volume pulse wave in the form of a digital signal, the mapping relationship from the digital volume pulse wave time c to the amplitude value is represented by f(c);

[0028] combine figure 1 As shown, in this embodiment, a photoelectric sensor 100 is used to collect the volume pulse wave of the measurement object from the finger end 200 of the measurement object. The photoelectric ...

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Abstract

The invention relates to the technical field of blood pressure measurement, in particular to a photoplethysmography based noninvasive continuous blood pressure measurement method. The method comprises the following steps that 1, a volume pulse wave of a measuring object is collected, and a digital volume pulse wave is obtained; 2, the maximum amplitude Hp, minimum amplitude Ht and cardiac cycle T of the digital volume pulse wave are extracted, and then the pulse waveform area Aarea and pulse wave average amplitude Have of the digital volume pulse wave in one cardiac cycle T are obtained; 3, a second-order differential volume pulse wave is obtained, a first rise fulcrum P1 and a second rise fulcrum P2 in one cardiac cycle T of the second-order differential volume pulse wave are extracted, and then pulse wave translation time PWTT is obtained, wherein the pulse wave translation time is a time difference of the first rise fulcrum P1 and the second rise fulcrum P2; 4, a pulse-pressure difference DP is obtained; 5, systolic blood pressure SBP is obtained; 6, diastolic blood pressure is obtained. Accordingly, the measurement precision is high, and measurement is easy and convenient.

Description

technical field [0001] The invention relates to the technical field of blood pressure measurement, in particular to a noninvasive continuous blood pressure measurement method based on photoplethysmography. Background technique [0002] Blood pressure (Blood Pressure, BP) is an important physiological health indicator of the human body, which can provide important parameter basis for the diagnosis and treatment of cardiovascular diseases. [0003] Existing blood pressure measurement can be divided into two categories: invasive blood pressure measurement and non-invasive blood pressure measurement. In invasive blood pressure measurement, the catheter of the pressure sensor needs to be inserted into the aorta or heart of the measurement object to detect the blood pressure signal. The measurement result is accurate, but preparation Long time, high requirements on the subjects and easy to cause complications; non-invasive blood pressure measurement generally obtains blood pressur...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/021
CPCA61B5/02108A61B5/02125A61B5/72
Inventor 李晓风李皙茹谭海波许金林吕波元沐南程龙乐潘婉苏
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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