Noninvasive beat-to-beat blood pressure measurement device and method based on double pulse waves

Abstract

The invention discloses a noninvasive beat-to-beat blood pressure measurement device and method based on double pulse waves, and relates to the field of medical apparatus and instruments. The device comprises a pulse wave signal measuring module, a microprocessor, a data storage module and a data processing module; the pulse wave signal measuring module comprises a first pulse wave signal measuring unit and a second pulse wave signal measuring unit; the microprocessor is used for receiving a first pulse wave signal and a second pulse wave signal measured by the first pulse wave signal measuring unit and the second pulse wave signal measuring unit, the first pulse wave signal and the second pulse wave signal are processed through the data processing module to obtain a blood pressure measurement value, and the blood pressure measurement value is stored in the data storage module. Accordingly, pulse wave transit time is defined by subtracting a cardiac cycle reduced by few times from a time interval from the feature point of one pulse wave signal to the feature point of the other pulse wave signal, and the situation that due to individual varieties, model parameters are different, and the individual physiological state changes slowly is considered.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a noninvasive beat-by-beat blood pressure measurement device and a measurement method based on dual pulse waves. Background technique [0002] Blood pressure is an important physiological parameter of the human body, which can reflect the functional status of the human heart and blood vessels. Continuous measurement of blood pressure is of great significance. First of all, continuous blood pressure measurement is of great significance for the prevention, diagnosis and treatment of hypertension. Secondly, continuous measurement of blood pressure and understanding of the diurnal variation of blood pressure are of great significance to the prevention of sudden cardiovascular diseases. Thirdly, since arterial blood pressure can reflect the state of cardiovascular function, it is important for astronauts to observe the overall change law of heart and blood circulation system function ...

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Problems solved by technology

[0004] The domestic application number is 201510335331.5 and the patent application titled "a non-invasive continuous blood pressure measurement method" uses the ECG signal and the pulse wave signal to obtain the pulse wave transit time, and then estimates the blood pressure, but the ECG signal of the human skin is very weak and very weak. Susceptible to electrostatic interference, difficult to use for 24 / 7 monitoring

The domestic application number is 201410831159.8 and the title is "a blood pressure measurement method and device based on double PPG". As time changes, it does not involve the model parameter correction process, and also does not realize the beat-by-beat measurement of blood pressure

[0005] The existing technology uses electrocardiographic signals, which are seriously affected by electrostatic interference, and are not suitable for all-day blood pressure monitoring; the equipment comes with a display screen, which not only leads to huge power consumption, but also is not conducive to the miniaturization of the equipment; the current pulse wave transit time and The relationship model of blood pressure is not accurate enough, resulting in too much error; the model parameters change greatly with time, and there is no convenient and easy parameter correction method

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