A dynamic continuous blood pressure measurement watch based on pwtt

Abstract

The invention provides a PWTT-based dynamic continuous blood pressure measurement watch, which belongs to the technical field of non-invasive continuous blood pressure measurement. The present invention flexibly screens PWTT data, and obtains PWV through PWTT, arm length, and the average distance from the shoulder to the heart of a normal person, so that the final calculation of PWV has higher precision. At the same time, when calculating blood pressure based on PWTT, not only the direct correlation between the two is considered It also considers the relationship between high pressure, pulse pressure, heart rate and blood pressure, by calculating the autocorrelation coefficient, regression coefficient and regression constant between each group of data, and finally calculates the blood pressure value according to the calculated parameter regression equation, the result is more accurate, In addition, during this process, the real-time collected data and calibration data will participate in data screening and calculation of subsequent regression coefficients, etc., and the real-time collected data will be added to the calibration area for new measurements. By continuously optimizing the calibration area, the Blood pressure measurements are more accurate.

Description

technical field [0001] The invention relates to the technical field of non-invasive continuous blood pressure measurement, in particular to a dynamic continuous blood pressure measurement watch based on PWTT. Background technique [0002] Pulse Wave Transit Time (PWTT) is the transmission time of the arterial blood pressure wave along the blood vessel wall. This time is composed of the time from the start of the heart contraction to the opening of the aortic valve to the pulsation of blood in the aorta, which is transmitted to the peripheral part through the blood vessel. , PWTT parameters can be obtained from the ECG and pulse wave of the wrist. At present, there are a large number of clinical trials showing that the relationship between pulse wave transit time and blood pressure is a clear phenomenon in physiology. Using this phenomenon, combined with individual gender, height, Based on basic characteristics such as body weight, arm length, and age, a special algorithm can...

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Problems solved by technology

[0012] The purpose of the present invention is to overcome the defect that the existing algorithm cannot flexibly and dynamically adjust the calculation time and calculation error, and provides a dynamic continuous blood pressure measurement watch based on PWTT, wherein the PWTT data is flexibly screened, and the PWTT, arm length The PWV is obtained from the average distance from the shoulder to the heart of a normal person, which makes the final calculated PWV more accurate. At the same time, when calculating blood pressure based on PWTT, not only the direct correlation between the two is considered, but also high pressure (SBP), pulse pressure (PP), The relationship between heart rate (PULSE) and blood pressure, by calculating the autocorrelation coefficient, regression coefficient and regression constant between each group of data, and finally calculate the blood pressure value according to the calculated parameter regression equation, the result is more accurate, in addition, in the process The real-time collected data and calibration data will also participate in data screening and subsequent calculation of regression coefficients, etc., and the real-time collected data will be added to the calibration area for new measurements. By continuously optimizing the calibration area, the blood pressure measurement results will be more accurate.

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