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Method for measuring arterial pressure, apparatus and individual correction tech. therefor

A technology of arterial blood pressure and measurement methods, applied in vascular assessment, cardiac catheterization, etc.

Inactive Publication Date: 2006-11-29
BEIJING XINXING YANGSHENG TECHN CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It was also proposed that by changing the body position (such as lying down and raising the legs), the pressure in some of the blood vessels of the subject will change, so that the pulse wave velocity in this blood vessel will change, and finally cause the change of the pulse wave transit time. Under normal conditions Carry out two groups of independent tests under the state of changing the body position, and determine the two parameters a and b through the two groups of measured results. This method can improve the accuracy of the correction, but it cannot continuously obtain the pulse rate corresponding to each beat under the state of changing the body position. Multiple sets of information related to blood pressure

Method used

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  • Method for measuring arterial pressure, apparatus and individual correction tech. therefor
  • Method for measuring arterial pressure, apparatus and individual correction tech. therefor
  • Method for measuring arterial pressure, apparatus and individual correction tech. therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] In this example, the method for determining the arterial blood pressure value of a beat is:

[0056] 1. Fix the cuff on the upper arm of the individual under test, and obtain the average blood pressure BP of the subject through the oscillometric method or auscultation method 0 , and measure the pulse wave transit time PWTT at the corresponding moment 0 .

[0057] 2. Obtain a series of Korotkoff sound delay time T and the corresponding cuff pressure P value through the complete deflation process of the cuff, and form the average blood pressure of the testee as BP 0 The function of the delay time of Korotkoff sound under the horizontal cuff pressure T K (P), the quadratic curve fitting is carried out on the discrete data forming the function, and a T that shortens the delay time of the Korotkoff sound as the cuff pressure decreases is obtained. K (P) relationship curve (see Figure 8 ); and according to the function T K (P) Calculate dT for each point K / dP function...

Embodiment 2

[0066] This example is an example of measuring changes in arterial blood pressure beat by beat.

[0067] Figure 7 It is a schematic diagram of the data acquisition and processing process in this example, and the specific process is as follows:

[0068] 1. First use the same method as in Example 1 to obtain a series of Korotkoff sound delay times T and corresponding cuff pressure P values ​​in the complete deflation process of the cuff to form a function T K (P); Carry out quadratic curve fitting to the discrete data forming this function, obtain a Korotkoff sound delay time T K T as a function of cuff pressure P K (P) fitting curve (see Figure 8 ).

[0069] 2. For the above T K(P) Fit the curve to obtain the difference, and obtain the change of the corresponding Korotkoff sound delay time when the unit pressure (1mmHg) changes, and form a new function sequence g(P), see Figure 9 .

[0070] 3. Continuously maintain the cuff pressure at a substantially constant level u...

Embodiment 3

[0080] This example is an example of individualized correction using the data obtained by the method for measuring arterial blood pressure of the present invention.

[0081] The regression equation between PWTT and beat-to-beat arterial blood pressure BP was established for the measured individual:

[0082] BP=a+b*PWTT...(A)

[0083] In the formula, BP is arterial blood pressure, PWTT is pulse wave transit time, and a and b are undetermined regression coefficients;

[0084] The individual correction method for the regression coefficients a and b in the above equation is:

[0085] (1) Fix the cuff and the sensor at the far end of the cuff to the upper arm of the subject, measure the blood pressure of the subject by auscultation, obtain the systolic blood pressure and diastolic blood pressure of the subject, and calculate the average arterial blood pressure through the empirical formula Value BP 0 (A more accurate BP can also be obtained by the oscillometric method 0 ):...

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Abstract

A method and device for measuring the blood pressure of artery and its personalized correction technique are disclosed. A series of the pressure values (P) for sleeve band and the time delay values (Tk) of the relative remote Ke's sounds are obtained. The function relation Tk(P) between said pressure change and sound delay is in turn obtained. Measuring a Tk relative to a P can calculate out the blood pressure change. A regression equation for continuous measurements of arteral blood pressure is used to obtain a personalized correction coefficient.

Description

technical field [0001] The invention belongs to a method and device for non-invasive measurement of arterial blood pressure, and an individualized correction technology for realizing continuous measurement of arterial blood pressure by using the method. Background technique [0002] Non-invasive blood pressure measurement is to indirectly obtain blood pressure by detecting parameters such as the pulsation of the side arterial wall or blood vessel volume. This measurement can be divided into two types: intermittent and continuous. The intermittent measurement is the blood pressure value at a specific measurement time. Since the pressure of blood on the arterial wall is changing every heartbeat and every time point, the systolic blood pressure and diastolic blood pressure measured by this method are not necessarily the representative blood pressure of the subject, and they are not in the same heartbeat. The continuous type can measure blood pressure without intermission, it ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/022A61B5/0225
CPCA61B5/02208A61B5/0225
Inventor 俞梦孙向海燕杨福生陶祖莱谢敏
Owner BEIJING XINXING YANGSHENG TECHN CORP
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