Non-invasive detection method and system for aortic stenosis section by section positioning by transfer function

Abstract

The invention discloses a non-invasive detection method and a system for aortic stenosis section by section positioning by a transfer function. According to the system, firstly a single chip microcomputer is utilized to control a pressure sensor to measure a carotid artery blood pressure signal, a four-limb cuff oscillometric method is utilized to measure blood pressure signals of four limbs, then blood pressure signals of five ways are sent to an upper computer, the signals are subjected to a fast fourier transform in the upper computer to obtain frequency spectrums of blood pressure wave forms of a carotid artery and an artery of four limbs, the carotid artery blood pressure wave form frequency spectrum is similar to an ascending aorta blood pressure frequency spectrum, and four-limb blood pressure wave form frequency spectrums are sequentially divided by the ascending aorta blood pressure frequency spectrum to obtain four transfer functions. Finally, whether the artery has a stenosis or not and the area and degree of the stenosis are judged according to similarity of modes and phase angles of four actually measured transfer functions and a theoretical standard reference curve. Besides, the non-invasive detection system for aortic stenosis section by section positioning is further disclosed. By means of the non-invasive detection method and the system for the aortic stenosis section by section positioning by the transfer function, pulse waves of the carotid artery and the artery of four limbs are merely required to be measured to achieve the non-invasive detection of the aortic stenosis, and defect that four limbs and a thoracic aorta stenosis can not be positioned by existing detecting technologies and systems is overcome.

Description

technical field [0001] The invention relates to the technical field of signal measurement and analysis, in particular to a non-invasive detection method for segmental positioning of aortic stenosis, and also to a measurement system. Background technique [0002] At present, the limb cuff oscillometric method is widely used in arterial detection systems and devices. It mainly measures the specific conditions of the arteries through the pulse wave propagation velocity, and uses the ankle-brachial index to detect lower extremity arterial stenosis. It has been widely used in clinical practice. The test results show that It works well for detecting narrowing of arteries and arteries of the lower extremities. However, there are deficiencies in the function of the artery detection system and device, because the ankle-brachial index can only be used to judge the arterial stenosis of the lower extremities, and cannot judge whether there is stenosis in the upper extremity and aortic s...

AI Technical Summary

Problems solved by technology

However, there are deficiencies in the function of the artery detection system and device, because the ankle-brachial index can only be used to judge the arterial stenosis of the lower extremities, and cannot judge whether there is stenosis in the upper extremity and aortic segment. In addition, the system cannot locate the arterial stenosis

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