Continuous dynamic blood pressure monitoring device and method based on pulse wave transit

Abstract

The invention provides an independently researched and developed continuous dynamic blood pressure monitoring device and method based on pulse wave transit time (PWTT) and pulse wave transit velocity (PWV). According to the device, an electrocardiosignal collecting module (104) is arranged on a main case (101) in a wristwatch form, a pulse wave signal collecting module (103) is arranged at the position, corresponding to the wrist radial artery, of a wristband (102), and the electrocardiosignal collecting module (104) and the pulse wave signal collecting module (103) are in signal connection with a control module (105). The device and algorithm can obtain pulse waves in real time, the problem that in-vitro heart pulse waves are inconvenient to obtain is solved, the method for rapidly and accurately obtaining the cardiac ejection time point is provided, and the method is an important part of continuous dynamic blood pressure monitoring.

Description

technical field [0001] The invention belongs to the technical field of continuous monitoring of non-invasive dynamic blood pressure, and in particular relates to a device and method for realizing continuous monitoring of dynamic blood pressure by obtaining pulse wave transit time and velocity. Background technique [0002] Cardiovascular and cerebrovascular diseases are the leading cause of death worldwide. The prevalence of cardiovascular disease in China is on the rise. As of the end of 2014, there were approximately 290 million cardiovascular disease patients nationwide ("China Cardiovascular Disease Report 2014"). Hypertension is the most common cardiovascular disease, a clinical syndrome mainly manifested by increased systemic arterial pressure. Arterial pressure includes systolic blood pressure (SBP) and diastolic blood pressure (DBP), and the average value of arterial blood pressure during a cardiac cycle is called mean arterial pressure (MAP). There are many cause...

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Problems solved by technology

[0011] 1) The device for pressurizing the inflatable cuff cannot realize real continuous dynamic blood pressure detection;

[0012] 2) It is somewhat difficult to calculate the distance L between the two measurement points collected by the pulse wave, and the prior art does not mention the exact solution;

[0013] 3) The existing technology does not exactly explain the influence of cardiovascular related parameters when using PWV to calculate blood pressure, the corresponding blood pressure value obtained from the sampling results has a large difference, and the obtained fitting curve deviates greatly from the actual situation;

[0014] 4) The results of photoelectric components are biased due to factors such as different skin colors at the detection site, scars, thick stratum corneum, and poor fit with the skin;

[0016] 6) The prior art does not clearly explain the relationship between systolic blood pressure and diastolic blood pressure calculated by PWV, especially the calculation method of diastolic blood pressure is relatively vague

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