Main artery non-invasive continuous blood pressure measuring method and device thereof

Abstract

The invention relates to a main artery non-invasive continuous blood pressure measuring method. The method comprises the following steps: emitting a first ultrasonic beam and a second ultrasonic beam to a region of a main artery blood vessel to be measured and collecting an echo signal; extracting shear wave from the echo signal and calculating the feature value of the shear wave spread along the wall of the main artery blood vessel; calculating the transient elasticity modulus of the wall of the main artery blood vessel according to the feature value; obtaining the continuous variation waveform of the diameter of the main artery blood vessel or the cross section area of the main artery blood vessel according to the echo signal; calculating the continuous variation waveform of the blood pressure of the main artery according to the transient elasticity modulus of the wall of the main artery blood vessel and the continuous variation waveform of the diameter of the main artery blood vessel or the cross section area of the main artery blood vessel; and calculating the continuous blood pressure waveform of the main artery. The main artery non-invasive continuous blood pressure measuring method can be applied to measurement of the blood pressure of main arteries such as carotid artery and achieves an important clinical value. In addition, the invention also provides a main artery non-invasive continuous blood pressure measuring device.

Description

technical field [0001] The invention relates to the field of blood pressure measurement, in particular to a large artery non-invasive continuous blood pressure measurement method and a device thereof. Background technique [0002] Cardiovascular disease has always been the "number one killer" that threatens human life. According to the statistics of the World Health Organization, more than 17 million people died of cardiovascular diseases in the world in 2008, and more than 3 million of them died under the age of 60. Cardiovascular disease has always been the leading cause of death in my country. In 2009, about 3 million people died of cardiovascular diseases in my country, accounting for 41% of the total deaths. The morbidity and mortality of cardiovascular diseases in the Chinese population are on the rise. It is estimated that the number of cardiovascular patients in the country has reached 230 million, and 1 in every 5 adults suffers from cardiovascular disease. How t...

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Problems solved by technology

The "blood pressure-vessel diameter (cross-sectional area)" relationship formula used in this method is a kind of nonlinear relationship between the difficult-to-measure arterial wall transient elastic modulus and blood pressure using the assumed analytical function relationship. Empirical approximation, essentially a subjective guess, accuracy not guaranteed

Although the measurement results of this method have been compared with the measurement results of invasive blood pressure many times, because its theoretical basis - "blood pressure-vessel diameter (cross-sectional area)" relationship formula - is not based on hemodynamic physics The mathematical derivation of the model is difficult to avoid the influence of individual differences on the established empirical formula, and it is also difficult to ensure the accuracy of the measurement results, so it has not been widely used clinically.

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