Korotkoff-sound-based blood pressure measurement method and blood pressure measurement and cardiovascular system evaluation system

Abstract

The invention discloses a korotkoff-sound-based blood pressure measurement method and a blood pressure measurement and cardiovascular system evaluation system, aiming to solve the problems of inaccurate blood pressure measurement and large influences of individual differences on measurement results in the prior art. Through combination of information detection at radial arteries with intelligent pressurization and pressure relief techniques, signal sources are stable, accurate capture of korotkoff sounds is ensured, and accordingly, the stability and reliability of the measurement results areimproved. Cardiovascular parameters of a human body can be calculated according to basic information of the human body and the measurement results, information of the human body, such as age, height,gender, weight and arm length, is entered, and a series of measured cardiac function parameters such as PWV (pulse wave velocity), heartbeat, heart output and blood viscosity are acquired through algorithm processing, so that an examinee is assisted in evaluating the state of his/her cardiovascular system.

Description

technical field [0001] The invention belongs to the technical field of medical detection, and specifically refers to a Korotkoff sound-based blood pressure measurement method and a blood pressure measurement and cardiovascular system evaluation system. Background technique [0002] Blood pressure measuring instruments are mainly used to measure human blood pressure, and are generally used in the prevention and treatment of abnormal blood pressure. The accuracy of blood pressure measurement is directly related to the effect of prevention and treatment. For example, if the blood pressure measurement is inaccurate, the treatment will lose its effective basis. health and even life. Whether the blood pressure can be measured accurately depends on the accuracy and stability of the blood pressure measuring instrument. [0003] At present, although there are many types and brands of blood pressure measuring instruments on the market, in terms of the working methods and principles ...

AI Technical Summary

Problems solved by technology

Oscillometric blood pressure measurement technology is currently widely used in automatic blood pressure measuring instruments, and its criterion is given by statistical methods through a large number of population experiments. Therefore, there are obvious defects in oscillometric blood pressure measurement : That is, there is a large error between individual measurements

[0009] (1) Mercury sphygmomanometer judges systolic and diastolic blood pressure by human auscultation to judge the first and fifth phases of Korotkoff sounds (controversial: some scholars think it should be the fourth phase), but it generally requires well-trained professionals It is closely related to the user's experience and operation, which leads to a very limited range of use of mercury sphygmomanometers

On the other hand, the dependence of the mercury sphygmomanometer itself on the professional quality of the operator leads to human subjective errors and objective errors caused by the theoretical defects of the Korotkoff sound method itself, such as: the beginning and end characteristics of the Korotkoff sound, false The pressure error between high pressure, false low pressure, and two pulse beats sometimes cannot give accurate blood pressure measurement values, and sometimes even has large errors

At the same time, mercury-containing products are also more harmful to the environment

[0010] (2) The Korotkoff sound electronic sphygmomanometer uses an electronic auscultation device to collect Korotkoff sound signals for auscultation, but because electronic collection of Korotkoff sounds is extremely difficult and the anti-interference ability is poor, it is difficult to separate effective Korotkoff sounds from background noise It comes out that the error comes from the professional skills of the measurement personnel and the standardization of the measurement process. Therefore, the Korotkoff sound electronic sphygmomanometer is rarely used in clinical practice, and it is not suitable for conventional home users.

[0011] In the prior art, the Korotkoff sound method measurement accuracy also faces the following problems: (1) blood pressure of arrhythmia: although the measurement of the blood pressure of hypertensive patients with premature premature beats, atrial fibrillation, and premature ventricular contractions must manually use mercury desktop sphygmomanometers, Barometer-type sphygmomanometer or reading-assistant sphygmomanometer for detection, but there are too many hypertensive patients in this part of the population, and it is difficult to measure accurate blood pressure even with manual detection

(2) Blood pressure of reflux disorder: Upper arm blood reflux disorder is an unavoidable problem both at home and abroad. It is manifested in the sudden decrease of Korotkoff volume when some people measure blood pressure after the first blood pressure measurement and the second continuous blood pressure measurement. , it is difficult to find the volume of the first time repeatedly, so the measurement fails, after that, the Korotkoff volume in the third consecutive blood pressure measurement is smaller or even difficult to distinguish

(3) The speed of decompression is uneven, which affects the accuracy of measurement: the sphygmomanometer is fast first and then slow when pressurizing and releasing, the air pressure does not change at a uniform speed, and there is a large error in the systolic blood pressure, especially the 3rd grade of >180mmHg Blood pressure levels are difficult to measure accurately

[0012] In addition, the smart bracelets (watches) currently on the market also have the function of blood pressure measurement. Its working principle is to calculate the blood pressure measurement value based on the measured heart rate and pulse wave, but its measurement accuracy is extremely low. no application value

[0013] In summary, the existing technology can no longer meet the urgent need for blood pressure control of patients at the present stage. It is hoped that blood pressure can be measured accurately and conveniently, and the operation is stable and reliable. Therefore, for those skilled in the art, it is necessary to develop a new set of design ideas and Theory, used to solve the problems existing in the existing technology, is particularly important

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