title: Influence of elastic nonlinearity on arterial anastomotic compliance.
abstract: This study illustrates how the highly nonlinear elastic behavior of artery wall material can cause unusual structural characteristics that do not occur with a linear-elastic material. An example mathematical model of an end-to-end anastomosis successfully predicts the experimentally observed area of elevated elastic compliance, called the "Para-anastomotic Hypercompliant Zone" (PHZ). The elastic hypercompliance is shown to occur because the anastomosis locally restricts the arterial diameter, thus forcing the adjacent material to remain in a lower strain, and correspondingly a lower stiffness, part of its non-linear stress-strain curve. Elevated elastic compliance can be avoided by locally matching both the arterial diameter and the elastic compliance within the physiological pressure range.
authors.affiliation: Department of Mechanical Engineering, University of British Columbia, Vancouver, Canada.
authors.forename: G S
authors.initials: GS
authors.lastname: Schajer
authors.forename: S I
authors.initials: SI
authors.lastname: Green
authors.forename: A P
authors.initials: AP
authors.lastname: Davis
authors.forename: Y N
authors.initials: YN
authors.lastname: Hsiang
mesh_terms: D000714:Anastomosis, Surgical; D000818:Animals; D001158:Arteries / Q000502:physiology*; D001672:Biocompatible Materials; D001807:Blood Vessel Prosthesis; D004548:Elasticity; D006801:Humans; D008955:Models, Cardiovascular; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials