Wearable continuous blood pressure estimating system and method based on dynamic compensation of diastolic blood pressure

Abstract

The invention relates to a wearable continuous blood pressure estimating system and a method based on dynamic compensation of diastolic blood pressure.A wearable electrocardio-sensing unit and a volume pulse wave sensing unit are used for measuring an electrocardiosignal and a volume pulse wave signal, both of which are connected to a signal acquisition and transmission unit by means of a connection converting unit at the neck portion and synchronously collected and sent wirelessly to a portable intelligent computing and processing unit. The portable intelligent computing and processing unit provides functions of blood pressure calibration and continuous estimation, more specifically, comprises real-time wireless reception of signals, pre-processing, detection of feature points, display and storage and real-time computation and display of systolic blood pressure and diastolic blood pressure.A pulse transit time method is adopted by an estimation of systolic blood pressure. A way of thinking for dynamic compensation based on volume pulse amplitude value and time parameters is utilized by an estimation of diastolic blood pressure. Therefore, estimating accuracy is improved. The wearable continuous blood pressure estimating system is characterized by being small in size and power consumption and low in cost and is suitable for being worn everyday without influencing upon daily activities.

Description

technical field [0001] The invention belongs to a wearable continuous blood pressure estimation system and method, in particular to a wearable continuous blood pressure estimation system and method based on diastolic pressure dynamic compensation. Background technique [0002] Blood pressure (BP) is the lateral pressure acting on the vessel wall per unit area when blood flows in the vessel, that is, the pressure. Blood pressure is an important parameter of the function of the human circulatory system, and it is also an important basis for clinical diagnosis and treatment of diseases, and continuous blood pressure estimation is of great significance. [0003] Currently, continuous blood pressure estimation based on pulse transit time (PTT) method usually chooses PTT as an independent variable, and calculates systolic blood pressure (SBP) and diastolic blood pressure (diastolic blood pressure) through linear function, inverse proportional function or parabolic function. blood...

AI Technical Summary

Problems solved by technology

Among them, the inflatable cuff has an oppressive effect on human blood vessels, which is not conducive to long-term estimation, and cannot realize continuous blood pressure estimation; non-cuff systems include wearable wristbands, wearable bracelets, wearable clothes, wearable chest straps and watches, etc. Although these wearable systems can realize continuous blood pressure estimation, there are still some practical problems: for example, wearable wristbands or wristbands generally use the pressure pulse wave sensor on the wrist or the volume pulse wave sensor on the fingertips to collect blood pressure. Signals, while the sensors located on the wrist or fingertips are not only susceptible to interference from movement due to the flexibility and hyperactivity of the arms, but also the fingertip sensors bring inconvenience to many actions of people; wearable devices are used to achieve good ECG signals and skin Contact, usually in the form of Lycra material or sports tight tops or underwear, this design is not suitable for wearing in hot summer weather and does not meet the aesthetics of many modern people's clothing, so it has not yet been widely accepted by the crowd

[0005] To sum up, there are still some problems in the current wearable continuous blood pressure estimation system. Some systems are not convenient and comfortable to wear, and the blood pressure estimation accuracy of some systems needs to be improved.

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