GRK 2154 - Materials for Brain

Project 2a Prasanth Velvaluri

Thin film flow-diverter stents based on superelastic shape memory alloys

Flow diverter (FD) stents produced from thin film technologies based on shape memory alloys have a lot of unseen potential when compared to the commercially available counter parts. The ability to produce 3D structures on stent struts gives an additional edge to the design capabilities. The current project aims in developing new FD stents with increased functionality in the treatment of certain intracranial aneurysms, which are hard to treat with current FD stents. Finite element modelling is carried out in order to test the crimpability of various stent designs and to find optimum design parameters. Furthermore, validated stent designs are to be produced using thin film technologies and will be characterized for their functional behavior. The mechanical and structural functionalities are evaluated using various techniques to determine crimpability, radial force, flexural strength, wall opposition etc. The major part of the testing is flow characterization and this is to be carried out in co-operation with project P2b, where the produced stents will be tested for flow efficacy in 3D printed aneurysm models.