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The presented investigation was designed to assess the biomechanical behavior of a 3D biomimicking self-expanding stent with respect to general technical parameters added by first clinical tests. The test sample was a Veryan Medical Biomimics 3D with 6.0 mm expanded diameter and 80 mm length. The profile of the delivery catheter with mounted stent, the strut thickness, the bending stiffness, the axial stiffness for tension and compression and the length change during expansion were measured. The bending stiffness was 2.73 Nmm², axial stiffness at tension 7.77 N/mm and at compression 97.61 N/mm. The stent shortened during expansion by 11.54 %. Radial force at 5 mm diameter was 2.54 N. Clinical experience provided no stent fractures after 24 months. Duplexsonography showed stent patency without any binary restenosis or intimal hyperplasia.

Biomechanics and clinical experience of a 3D biomimicking vascular stent