Circumferentially flexible vascular grafts.
An arterial graft with a corrugated cylindrical cross-section has been proposed as a partial solution to the problem of elastic stiffness mismatch between conventional grafts and arterial tissue (Trescony et al., 1994, US Patent 5,282, 847 (granted February 1 1994)). A two-dimensional ring theory model and a finite element shell theory model are used to study the inflation under uniform interior pressure of grafts with noncircular cross-sections as a first approximation to their behavior in vivo. For the physically relevant range of area expansions (typically 7-10%) and pressures (8-18 kPa), corrugations can significantly reduce the graft stiffness in comparison to conventional circular cross-section grafts.
Stump
D M
DM
Department of Mathematics, The University of Queensland, St. Lucia, Australia.
Hart
V G
VG
Tuttle
S L
SL
D000465:Algorithms; D001158:Arteries / Q000502:physiology / Q000601:surgery; D001672:Biocompatible Materials / Q000737:chemistry; D001794:Blood Pressure; D001807:Blood Vessel Prosthesis; D003187:Compliance; D003198:Computer Simulation; D004548:Elasticity; D020342:Finite Element Analysis; D006801:Humans; D008955:Models, Cardiovascular; D018583:Pliability; D011474:Prosthesis Design; D013499:Surface Properties
D001672:Biocompatible Materials