Non-invasive blood pressure measuring device based on characteristics of photoelectric capacitive pulse wave

Abstract

The invention provides a non-invasive blood pressure measuring device based on the characteristics of photoelectric capacitive pulse wave. The device includes a processor, a pulse wave module, a signal processing module and a blood pressure measurement calibration module. The device has the beneficial effects of extracting the characteristics of the pulse wave by processing photoelectric capacitive pulse wave signals, and extracting the new parameter, namely mean slope transmission time (MSTT), capable of replacing pulse wave transmission time. The mean slope transmission time is not affected by the heart pre-ejection period (PEP), so that the effect of PEP on non-invasive blood pressure continuous measuring device is eliminated to achieve blood pressure estimation through the single physiological signal photoelectric capacitive pulse wave; moreover, a passive measurement mode is adopted to reduce the influence of external factors on the measuring device. The non-invasive blood pressure measuring device based on the characteristics of the photoelectric capacitive pulse wave has the advantages of being capable of achieving real-time non-invasive blood pressure continuous measurement, easy to operate, wearable in use, and convenient to use daily for users.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a noninvasive blood pressure measuring device based on the characteristics of photoplethysmography waves. Background technique [0002] Blood pressure is an important physiological parameter that reflects cardiovascular and cerebrovascular functions, and is of great significance in disease diagnosis and treatment effect observation. In practical applications, blood pressure indicators need to be detected conveniently, quickly, accurately and continuously, and the current measurement methods mainly include auscultation and oscillometric methods, constant volume methods and pulse wave velocity methods. [0003] The auscultation method is also called the Keshi sound method. It is to bind the armband of the manometer (commonly called a sphygmomanometer) to the pulse position of the brachial artery of the upper arm, inflate and pressurize the brachial artery, and then deflat...

AI Technical Summary

Problems solved by technology

[0013] Poor portability: the existing continuous blood pressure measurement devices are too bulky to be carried around

[0014] Active measurement: Most of the existing measurement methods are active measurement, and the testee must take the initiative to cater to the detection device to obtain the test results, which is not suitable for daily use

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