System and method for multi-segment large artery stiffness test

Abstract

The invention discloses a system and a method for multi-segment large artery stiffness tests. The system comprises a measuring system, a photoelectric pulse sensor, a signal conditioning device, and a signal display device. The measuring system is used to measure the body surface distance between strongest pulsation points of two arterial pulses. The photoelectric pulse sensor comprises a PPG emission light source, a photosensitive reception member, and a constant current source control circuit. The signal conditioning device is formed by an integrated instrument amplifier, a low pass filter, an A / D converter, and a single-chip microcomputer. The system can be used for noninvasive acquisition of photoelectric plethysmography signals of human main superficial large arteries, including common carotid-femoral artery, common carotid-radial artery, and femoral-arteria dorsalis pedis, and realizes rapid detection of pulse wave speed of upper limbs and lower limbs, so as to more accurately and more directly show stiffness conditions of aortas and upper limb and lower limb aortas, and evaluate risks of cardiovascular and cerebrovascular diseases. The system and the method are beneficial for early discovery and prevention of cardiovascular and cerebrovascular diseases.

Description

technical field [0001] The invention discloses a test system and method for multi-segment aorta stiffness based on photoplethysmography signals, and relates to the field of cardiovascular medicine. Background technique [0002] The aging of the population makes cardiovascular and cerebrovascular diseases one of the main health hazards of the population, and arterial and vascular structural and functional lesions typically characterized by atherosclerosis are the common pathological basis of cardiovascular and cerebrovascular diseases such as myocardial infarction and stroke . Atherosclerosis has the characteristics of invisibility and long-term progression of the disease process. Therefore, early detection of arterial function and structural lesions, and active and targeted interventions can delay the process of atherosclerosis, effectively Reduce the morbidity, disability and mortality of cardiovascular and cerebrovascular diseases. [0003] In each cardiac cycle, the pul...

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Problems solved by technology

[0004] At present, the detection of arterial stiffness in the field of cardiovascular medicine is mostly based on the pressure method or the oscillation method to obtain pulse wave signals. Among them, the pressure method is greatly affected by the operator's human factors, while the oscillation method has errors in estimating the length of blood vessels based on height. Therefore, the above two test methods may cause a certain degree of measurement error

However, photoplethysmography (PPG) is currently limited to the acquisition of volumetric pulse signals at extremities (such as fingers and toes) by means of transmission, and this method has not been applied to the collection of pulse signals of superficial large arteries such as carotid arteries and femoral arteries.

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