Preventing Stent Failure with Bi-Stable Structures

A leading cause of stent failure and re-stenosis is unreliable and inconsistent expansion of stents inflated with balloons. Prof. James from the department of aerospace engineering has created a new bi-stable design that consistently and uniformly snaps open into a secondary configuration. The secondary position is in equilibrium and resist plastic deformations. The new stent design can be fabricated with different materials and will reduce failed stent procedures that are currently 10-15% with 40% of patients requiring a second procedure within a year. 

James & Waisman, "Layout design of a bi-stable cardiovascular stent using topology optimization". Comput. Meth. Appl. Mech. Eng. 2015