Non-invasive blood pressure detecting system and method based on finger artery waves

Abstract

The invention provides a non-invasive blood pressure detecting system and method based on finger artery waves. The detecting system comprises two photocapacitance pulse wave sensors, a filtering and amplifying circuit, a microprocessor master control circuit, a battery module, a mobile communication module and a cloud platform. The detecting method includes the steps that firstly, photocapacitance pulse wave signals of two points in front of and behind the same finger artery are acquired at the same time, after being filtered and amplified, the two paths of photocapacitance pulse wave signals are subjected to AD conversion, corresponding feature points are subjected to position marking, the waveform feature point time difference between the two paths of waves is calculated, pulse wave conduction time is obtained, and a linear equation is established according to the direct proportion relation between blood pressure and the pulse wave conduction time; finally, the obtained pulse wave conduction time and blood pressure data obtained through a sphygmomanometer are substituted into the linear equation, individual undetermined parameters are calibrated, new pulse wave conduction time is substituted into the linear equation obtained after the parameters are determined, and the blood pressure of a testee is obtained through calculation. The non-invasive blood pressure detecting system is light, small and ingenious in design, no traditional cuff is needed, and the testing result is precise.

Description

technical field [0001] The invention belongs to the field of human health monitoring, in particular to a noninvasive blood pressure detection system and method based on finger arterial waves. Background technique [0002] In recent years, with the advancement of science and technology and the continuous improvement of living standards, people's lifestyles and dietary structures have undergone tremendous changes, resulting in an increasing trend of cardiovascular diseases in our country year by year. As one of the important physiological parameters of the human body, blood pressure can reflect the cardiovascular function of the human body and is of great significance in medical research, disease diagnosis, and prognosis judgment. [0003] There are currently two methods for measuring blood pressure: invasive measurement and noninvasive measurement. [0004] Invasive measurement is to directly insert a catheter with a pressure sensor into the patient's arterial blood vessel t...

AI Technical Summary

Problems solved by technology

These two methods also require the use of a cuff during blood pressure measurement. Long-term measurement can easily lead to venous congestion, which will affect the accuracy and make the subject feel uncomfortable.

However, the newly emerging measurement method obtains the pulse wave transit time by analyzing the ECG signal and the photoplethysmography signal, and then obtains the blood pressure. Since the measurement of the ECG signal will make the overall structure of the device complicated and inconvenient to use, it is not conducive to blood pressure. Portable and beautiful design

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