J022053 Study of Examining Reflection Ratio of Human Peripheral Artery

Abstract

Human arterial model was proposed by Avolio in 1980. Medium-sized artery and aorta of the body are discretized into 128 segments in the model, and the Young's modulus and dimension of each segment are described. Terminal condition of the aorta is also given as the impedance based on the peripheral resistance. In 2004, John assumed terminal condition to be not only resistance but both resistance and capacitance at the end of this model. In his model, the reflection ratio is defined to be a real number even though there is time delay of pulse wave transmitted into arteriole. In this study, the reflection ratio is defined to be a complex number in our model, and the transfer function of John model and our model are compared. The results suggest that the reflection ratio of the terminal condition should be expressed as complex number and our model is better than John's one.