DocumentCode :
2309819
Title :
Pulse wave velocities in the aorta under radial periodic motion
Author :
Gupta, R.S. ; Devi, L. Shila
Author_Institution :
Dept. of Appl. Sci. & Humanities, KNIT, Sultanpur, India
fYear :
1995
fDate :
15-18 Feb 1995
Firstpage :
32540
Lastpage :
32905
Abstract :
In the present study, an expression for the pulse wave velocity is derived as a function of the periodic motion through the use of finite deformation theory. The artery is assumed to be a thin-walled elastic cylinder which behaves as a nonlinear anisotropic, homogeneous and incompressible material. The effect of the surrounding tissues is also taken into account in the analysis which based on the use of the strain energy function. Numerical values of the wave velocities are computed from the derived analytical expression using the elastic constants for the in-vivo canine middle descending thoracic aorta as well as for a polyurethane graft used as a arterial prosthesis. The pulse velocity for the polyurethane graft is observed to be abnormally higher than that obtained for the case of an in-vivo artery. The difference in the results obtained for the two cases points out a mismatch in pulse velocity thereby suggesting the polyurethane graft arterial prosthesis is a poor mechanical model of a real artery
Keywords :
elastic constants; haemodynamics; physiological models; prosthetics; pulsatile flow; aorta; finite deformation theory; in-vivo canine middle descending thoracic aorta; nonlinear anisotropic homogeneous incompressible material; polyurethane graft arterial prosthesis; pulse velocity mismatch; pulse wave velocities; radial periodic motion; thin-walled elastic cylinder; Anisotropic magnetoresistance; Arteries; Biological materials; Capacitive sensors; Heart; Motion analysis; Prosthetics; Shearing; Tensile stress; Thin wall structures;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, 1995 and 14th Conference of the Biomedical Engineering Society of India. An International Meeting, Proceedings of the First Regional Conference., IEEE
Conference_Location :
New Delhi
Print_ISBN :
0-7803-2711-X
Type :
conf
DOI :
10.1109/RCEMBS.1995.532172
Filename :
532172
Link To Document :
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