Twist buckling of veins under torsional loading

Journal of Biomechanics
Justin R GarciaHai-Chao Han

Abstract

Veins are often subjected to torsion and twisted veins can hinder and disrupt normal blood flow but their mechanical behavior under torsion is poorly understood. The objective of this study was to investigate the twist deformation and buckling behavior of veins under torsion. Twist buckling tests were performed on porcine internal jugular veins (IJVs) and human great saphenous veins (GSVs) at various axial stretch ratio and lumen pressure conditions to determine their critical buckling torques and critical buckling twist angles. The mechanical behavior under torsion was characterized using a two-fiber strain energy density function and the buckling behavior was then simulated using finite element analysis. Our results demonstrated that twist buckling occurred in all veins under excessive torque characterized by a sudden kink formation. The critical buckling torque increased significantly with increasing lumen pressure for both porcine IJV and human GSV. But lumen pressure and axial stretch had little effect on the critical twist angle. The human GSVs are stiffer than the porcine IJVs. Finite element simulations captured the buckling behavior for individual veins under simultaneous extension, inflation, and torsion with strong c...Continue Reading

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Citations

Nov 16, 2017·Scientific Reports·Selda GoktasKerem Pekkan
Jan 22, 2020·Journal of Biomechanical Engineering·Nir Emuna, David Durban
Nov 5, 2019·International Journal for Numerical Methods in Biomedical Engineering·Mohammadali SharzeheeHai-Chao Han
Apr 4, 2019·Biomedical Engineering Online·Kun PengYongliang Mu
Dec 15, 2020·European Journal of Ophthalmology·Manuel Ap VilelaMaria Angélica T Ferreira

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