Method and device for detecting occlusion/reopening of an artery and system for measuring systolic blood pressure

Abstract

This invention provides a method and a device for detecting occlusion and / or reopening of an artery of a body caused by a changing pressure applied on the artery as well as a system for measuring the systolic blood pressure of an artery of a body. The method comprises the steps of: obtaining a blood flow signal indicative of a change of the blood flow in the artery caused by the changing pressure,using a Doppler Ultrasound transducer attached to the exterior of the body; deriving, from the blood flow signal, at least one variable of a first variable indicative of the magnitude of the blood flow and a second variable indicative of the periodicity of the blood flow; and detecting the occlusion and / or reopening of the artery on the basis of the at least one variable. In this way, the occlusion / reopening of the artery can be detected automatically. Since the need to manually detect the occlusion and reopening of the artery by listening with a stethoscope or a Doppler probe is eliminated, the detecting result is more predictable and repeatable, and therefore also more accurate.

Description

technical field [0001] The present invention relates to non-invasive blood pressure measurement, in particular to methods and devices for detecting occlusion / re-opening of arteries, and systems for measuring systolic blood pressure (SBP). Background technique [0002] Unlike invasive blood pressure measurement, non-invasive blood pressure measurement is an indirect method of measuring blood pressure in the arteries of the body. There are currently two types of noninvasive blood pressure measurement. [0003] One type of method is auscultatory (from the Latin for "listen"), which is the main method of clinical measurement because of its accuracy. With auscultation, the inflatable cuff of the sphygmomanometer is used to exert varying pressure on the artery to restrict blood flow in the artery. The cuff is first inflated until the artery is completely occluded, and then deflated until the artery reopens. The pressure values ​​at the moment of occlusion and reopening are usua...

AI Technical Summary

Problems solved by technology

However, the oscillometric method is relatively inaccurate compared to the auscultatory method because the measurements are calculated based on statistics without regard to individual

[0005] Therefore, existing blood pressure measurement methods are either inconvenient or inaccurate

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