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Updated: Nov 12, 2025

Monitoring the Wall Mechanics During Stent Deployment in a Vessel
Published on: May 8, 2012
Deformation mechanics of self-expanding venous stents: Modelling and experiments
Masoud Hejazi1, Farrokh Sassani1, Jöel Gagnon2
1Department of Mechanical Engineering, 6250 Applied Science Lane, University of British Columbia, Vancouver, B.C V6T 1Z4, Canada.
Abstract:
Deformation properties of venous stents based on braided design, chevron design, Z design, and diamond design are compared using in vitro experiments coupled with analytical and finite element modelling. Their suitability for deployment in different clinical contexts is assessed based on their deformation characteristics. Self-expanding stainless steel stents possess superior collapse resistance compared to Nitinol stents. Consequently, they may be more reliable to treat diseases like May-Thurner syndrome in which resistance against a concentrated (pinching) force applied on the stent is needed to prevent collapse. Braided design applies a larger radial pressure particularly for vessels of diameter smaller than 75% of its nominal diameter, making it suitable for a long lesion with high recoil. Z design has the least foreshortening, which aids in accurate deployment. Nitinol stents are more compliant than their stainless steel counterparts, which indicates their suitability in veins. The semi-analytical method presented can aid in rapid assessment of topology governed deformation characteristics of stents and their design optimization.
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