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Updated: Jul 24, 2026

Mechanical Testing of Mouse Carotid Arteries: from Newborn to Adult
Published on: February 23, 2012
Influence of elastic nonlinearity on arterial anastomotic compliance
G S Schajer1, S I Green, A P Davis
1Department of Mechanical Engineering, University of British Columbia, Vancouver, Canada.
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.
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