Abstract
During pulse signal collection, width information of pulse waves is essential for the diagnosis of disease. However, currently used measuring instruments can only detect the amplitude while can’t acquire the width information. This paper proposed a novel wrist pulse signal acquisition system, which could realize simultaneous measurements of the width and amplitude of dynamic pulse waves under different static forces. A tailor-packaged micro-electro-mechanical system (MEMS) sensor array was employed to collect pulse signals, a conditioning circuit was designed to process the signals, and a customized algorithm was developed to compute the width. Experiments were carried out to validate the accuracy of the sensor array and system effectiveness. The results showed the system could acquire not only the amplitude of pulse wave but also the width of it. The system provided more information about pulse waves, which could help doctors make the diagnosis.
Highlights
A non-invasive diagnostic method, is one of the most widely used diagnostic methods in traditional Chinese medicine (TCM), and its unique advantages are significant in the diagnosis of chronic disease
When the amplitude of the pulse signal sensed by the physician reaches its maximum, the static force is the best pulse-taking force, which corresponds to the depth of the radial artery
The results showed that the sensor array had good accuracy and repeatability and the proposed system could acquire the pulse waves under different static forces, meaning our proposed system could measure the depth, and measure the width of the pulse wave
Summary
A non-invasive diagnostic method, is one of the most widely used diagnostic methods in traditional Chinese medicine (TCM), and its unique advantages are significant in the diagnosis of chronic disease. There are three pulse regions of the radial artery called Cun, Guan, and Chi [1]. TCM physicians put their fingers on the patient’s wrist and exert different static forces on the three regions. The strength of pulse wave varies with the static force. When the amplitude of the pulse signal sensed by the physician reaches its maximum, the static force is the best pulse-taking force, which corresponds to the depth of the radial artery. At this time, the patient’s pulse characteristics [2,3], including length, width, amplitude, speed, rhythm, intensity, etc., are captured and analyzed to help
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