Document Detail


Twist buckling behavior of arteries.
MedLine Citation:
PMID:  23160845     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Arteries are often subjected to torsion due to body movement and surgical procedures. While it is essential that arteries remain stable and patent under twisting loads, the stability of arteries under torsion is poorly understood. The goal of this work was to experimentally investigate the buckling behavior of arteries under torsion and to determine the critical buckling torque, the critical buckling twist angle, and the buckling shape. Porcine common carotid arteries were slowly twisted in vitro until buckling occurred while subjected to a constant axial stretch ratio (1.1, 1.3, 1.5 (in vivo level) and 1.7) and lumen pressure (20, 40, 70 and 100 mmHg). Upon buckling, the arteries snapped to form a kink. For a group of six arteries, the axial stretch ratio significantly affected the critical buckling torque ([Formula: see text]) and the critical buckling twist angle ([Formula: see text]). Lumen pressure also significantly affected the critical buckling torque ([Formula: see text]) but had no significant effect on the critical twist angle ([Formula: see text]). Convex material constants for a Fung strain energy function were determined and fit well with the axial force, lumen pressure, and torque data measured pre-buckling. The material constants are valid for axial stretch ratios, lumen pressures, and rotation angles of 1.3-1.5, 20-100 mmHg, and 0-270[Formula: see text], respectively. The current study elucidates the buckling behavior of arteries under torsion and provides new insight into mechanical instability of blood vessels.
Authors:
Justin R Garcia; Shawn D Lamm; Hai-Chao Han
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2012-11-16
Journal Detail:
Title:  Biomechanics and modeling in mechanobiology     Volume:  12     ISSN:  1617-7940     ISO Abbreviation:  Biomech Model Mechanobiol     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-09-16     Completed Date:  2014-05-30     Revised Date:  2014-10-14    
Medline Journal Info:
Nlm Unique ID:  101135325     Medline TA:  Biomech Model Mechanobiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  915-27     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Animals
Biomechanical Phenomena
Carotid Artery, Common / physiology*
Pressure
Rotation
Stress, Mechanical
Sus scrofa / physiology*
Torque
Torsion, Mechanical*
Grant Support
ID/Acronym/Agency:
GM60655/GM/NIGMS NIH HHS; HL095852/HL/NHLBI NIH HHS; R01 HL095852/HL/NHLBI NIH HHS; R25 GM060655/GM/NIGMS NIH HHS; T32 HL007446/HL/NHLBI NIH HHS
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