The theoretical analysis and the tube simulation experiments of the blood pressure wave velocity
Date Issued
2010
Date
2010
Author(s)
Chang, Chi-Wei
Abstract
Foot-to foot method is widely used to measure the pressure wave velocity (PWV) in large arteries and to assess arterial stiffness. However, the harmonic proportions of the pressure pulse varying along the large arteries may give an additional influence on the PWV measurement. Our effort is to investigate the validity of this method by a T-tube simulated arterial system. To find the true wave velocity, we generated a single impulse and measured the interval of the time as the pulse arriving at two different locations of the tube. We then replaced the impulse by a periodic water input to simulate the effect of heart. The measurements of pulse wave velocity for five tubes of different elasticity were performed. We found that the PWVs evaluated by foot-to foot method depend greatly on the locations of the pressure transducers and are not in consistent with the true wave velocity. Nevertheless, the correlation of the arterial stiffness with the PWV by foot-to foot method is significant. We would base on the “radial oscillation theory” to get the analytical solution of the T-tube system and compared the numerical answer to the experimental result. We will give a new explanation about the correlation between the PWV and the elasticity of the arterial wall.
Subjects
pulse wave velocity
PWV
Type
thesis
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