Research of dynamic blood pressure detection and calibration method of radial artery

Abstract

The invention relates to a dynamic blood pressure detection and calibration method of a radial artery. The method comprises the following steps: measuring a blood pressure value BP1 to perform first calibration by using oscillography; measuring a blood pressure value BP2 to perform second calibration by using correlation of an electrocardiosignal, a pulse wave signal and human arterial pressure; finally performing continuous monitoring of blood pressure by using the linear relation between pulse wave transmission time difference PWT of two different parts on a wrist and the human arterial blood pressure which are measured at the same time.

Description

technical field [0001] The present invention generally relates to the research of a radial artery dynamic blood pressure detection and calibration method, and in particular to a device for continuous monitoring of blood pressure by using the linear relationship between the pulse wave transit time difference PWT and the human arterial blood pressure after two calibrations. method. Background technique [0002] Today, hypertension has become the most common chronic disease of the cardiovascular system and one of the global public health problems. Existing families and hospitals commonly used blood pressure measuring devices are mainly based on the Korotkoff sound method and the oscillometric method. Although it can accurately measure the blood pressure value, it needs to use a cuff during the measurement process. There is a process of inflation and deflation of the cuff, so it can only measure the blood pressure value at a certain moment, and because of the "white coat" pheno...

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Problems solved by technology

However, since the distance between the two sensors is susceptible to changes in human body movement, it will affect the measurement time interval PTT, resulting in errors in the estimated blood pressure value

[0005] Using pulse wave transit time PWT to estimate human arterial blood pressure is a non-invasive and continuous blood pressure measurement method. In 1922, someone discovered the relationship between pulse wave transit time PWT and human arterial blood pressure; in 1957, someone proposed the pulse conduction time There is a linear relationship between time PWT and arterial blood pressure, but this relationship is relatively stable only in a certain period of time for an individual, and the proportional coefficient between PWT and BP is different for different individuals, and in previous studies , different individuals are calculated using the same proportional coefficient, there is a certain error

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