Non-invasive blood pressure monitoring system and method for body surface

Abstract

The embodiment of the invention discloses a non-invasive blood pressure monitoring system and method for body surface. The system comprises a blood pressure monitoring sensor subsystem and a processor, wherein the blood pressure monitoring sensor subsystem comprises a transducer array unit, and the transducer array unit comprises a plurality of ultrasonic micro-transducers; the processor comprisesan excitation signal control module, wherein the excitation signal control module is used for controlling the excitation frequency and the excitation time of excitation signals of each ultrasonic micro-transducer of the transducer array unit according to the subcutaneous position depth of the detected arterial blood vessel, the blood flow speed and the detection resolution; and each ultrasonic micro-transducer of the transducer array unit is used for generating acoustic waves under the excitation of corresponding excitation signals so that the transducer array unit emits acoustic wave beams with preset incident angles to arterial blood vessel. The universality, convenience and accuracy of the blood pressure monitoring can be greatly improved by utilizing embodiments in the specification.

Description

technical field [0001] The invention relates to the technical field of medical monitoring, in particular to a non-invasive blood pressure monitoring system and method for body surface. Background technique [0002] Blood pressure monitoring has gained more and more attention in people's daily life, and the blood pressure curve can reflect many cardiovascular diseases. Real-time and convenient blood pressure monitoring is getting more and more demand. At present, there are many portable blood pressure monitoring methods on the market, such as PPG (photoplethysmography), ECG (electrocardiography) combined with PPG, and oscillometric method. (oscillation method), pressure measurement method, etc. [0003] PPG measurement is based on measuring the change of beam volume in blood to obtain blood pressure pulse wave signal. However, the penetration depth of this method is insufficient (<8mm), and it is only suitable for arteries that are relatively shallow from the skin surfac...

AI Technical Summary

Problems solved by technology

At the same time, the PPG method lacks directivity during detection, and the lateral resolution is low, and the measurement accuracy is low

Poor stability, easily affected by external light interference, skin (color, hair and sweat, etc.)

[0004] However, the combination method of ECG and PCG has high manufacturing cost and user cost, and the acquisition method is relatively complicated, which requires photoelectric sensors and ECG modules.

The oscillometric method has the disadvantages of making the miniaturized structure complicated, expensive, and exerting pressure on the user's blood vessels, resulting in poor user experience, etc.

The pressure measurement method is difficult to operate, and it is difficult to measure the signal of the subject with a thick fat layer.

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