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RESEARCH PAPERS

Bio-Medico-Mechanical Behavior of Natural Artery Blood Vessel Under Constant and Variable Internal Pulsatile Pressure Flow Test In Vitro

[+] Author and Article Information
A. T. Yokobori

Department of Mechanical Engineering II, Tohoku University, Sendai, Japan

T. Maeyama, T. Ohkuma, H. Sasaki, M. Kasai

Department of Second Surgery, Tohoku University, Sendai, Japan

T. Yokobori

Institute for Fracture and Safety, Sendai, Japan

H. Ohuchi

Sendai National Rail Road Hospital, Sendai, Japan

S. Nara

Toa Fuel Ltd., Kawasaki, Japan

J Biomech Eng 108(4), 295-300 (Nov 01, 1986) (6 pages) doi:10.1115/1.3138617 History: Received May 23, 1985; Revised June 02, 1986; Online June 12, 2009

Abstract

Studies have been carried out on the bio-medico-mechanical behavior in vitro of natural blood vessel (dogs) under constant and variable internal pulsatile pressure flow. The apparatus designed by us well simulated the arterial system. The studies were made for the case of pressure amplitude kept as constant, of the two-step-multi-duplicated pulsatile pressure and of the fluctuating pressure. For the case of the fluctuating pressure, the strength of the artery becomes considerably lower than those under constant amplitude and two-step-multi-duplicated pulsatile pressure. SEM observations of the inner walls of the artery shows that collagen fibers are more elongated under fluctuating pulsatile pressure flow. In conclusion, in order to avoid the mechanical deterioration of the artery strength, it is useful to keep the pulsatile blood pressure at constant amplitude. Even for the case of the blood pressure fluctuation, it is necessary to manage to keep the blood pressure as near a regular wave as possible, the total number of repeated pulse being equal.

Copyright © 1986 by ASME
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