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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: J Mech Behav Biomed Mater. 2017 Jul 13;75:160–168. doi: 10.1016/j.jmbbm.2017.07.017

Fig 8.

Fig 8

Behavior of stents under torsional loads. A) Torque (Nmm) – rotation (°/cm) relations for clockwise (+) twist; B) Torque (Nmm) – rotation (°/cm) relations for both clockwise (+) and counterclockwise (-) rotations for non-symmetric stents; C) Torsional stiffness (µN·m/°) calculated for linear and non-linear regions in panel A. Non-symmetric LifeStent, SmartFlex and Misago devices had different values in clockwise and counterclockwise twists which are marked accordingly; D) Maximum rotation that stents can withstand before buckling. Absolute Pro, Innova, Zilver, Viabahn and Tigris stents did not buckle within 0 to 90°/cm rotation range. Intersubject mean and maximum values of the largest rotation experienced by the Popliteal Artery (PA) in the gardening posture(Desyatova et al., 2017) are marked with blue and red horizontal lines at 26°/cm and 43°/cm respectively; E) Non-symmetric LifeStent, SmartFlex and Misago stents experienced buckling differently when rotated clockwise and counterclockwise. Images are presented for ±45°/cm rotations.