Abstract
Pulse diagnosis is important in oriental medicine. The purpose of this study is explaining the mechanisms of pulse with a cardiovascular simulator. The simulator is comprised of the pulse generating part, the vessel part, and the measurement part. The pulse generating part was composed of motor, slider-crank mechanism, and piston pump. The vessel part, which was composed with the aorta and a radial artery, was fabricated with silicon to implement pulse wave propagation. The pulse parameters, such as the depth, rate, shape, and strength, were simulated. With changing the mean pressure, the floating pulse and the sunken pulse were generated. The change of heart rate generated the slow pulse and the rapid pulse. The control of the superposition time of the reflected wave generated the string-like pulse and the slippery pulse. With changing the pulse pressure, the vacuous pulse and the replete pulse were generated. The generated pulses showed good agreements with the typical pulses.
Highlights
Pulse diagnosis is one of the most important diagnostic methods in oriental medicine
This study focused on the explaining of the pulse parameters such as depth, rate, shape, and strength that are clinically relevant [1] to hemodynamics
Various algorithms were suggested to distinguish between the floating pulse and the sunken pulse by measuring the changes of pulse amplitude based on the applied pressure or depth [3,4,5]
Summary
Pulse diagnosis is one of the most important diagnostic methods in oriental medicine. Fei [2] suggested the P-H (applied pressurepulse amplitude) curve based on the clinical measurements by a pulse-taking device. According to the P-H curve, a floating pulse has maximum pulse amplitude at low applied pressure. Various algorithms were suggested to distinguish between the floating pulse and the sunken pulse by measuring the changes of pulse amplitude based on the applied pressure or depth [3,4,5]. Fei [2] suggested the mechanism of the floating pulse and the sunken pulse with the blood pressure. The amplitude of pulse reached a maximum when the intravascular pressure and externally applied pressure were equal, and the P-H curve moved to the right as the inner pressure of the blood pressure increased.
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