User login


You are here

Investigation of Interaction between Guidewire and Native Vessel Using Finite Element Analysis

SIMULIA's picture

Endovascular aneurysm repair involves insertion of an introductory component called guidewire through native vessels to help with the guidance of the delivery catheter. Guidewire tends to alter the vessel geometry due to its higher stiffness compared to the vessel wall. Very limited data is available to understand such interactions. Investigation of interaction between guidewire and native vessels could provide useful insight into vessel stresses and guidewire deformation in-vivo. This could further help in understanding the initial conditions for delivery catheter and device performance testing to improve deliverability in tortuous anatomy. So, in this study, we evaluated the vessel deformation during guidewire insertion using 3-D finite element analysis with undeformed vessel geometry developed from patient specific Computed-Tomography (CT) scans. Pre-operative CT scans were used to generate 3-D reconstructions of human iliac region using Mimics (Materialise, Ann Arbor, MI). A finite element model was set up to simulate the vessel deformation where a guidewire was introduced from the distal end of the iliac and pushed up to the aneurysm region. The guidewire insertion analysis was run with both Abaqus/Standard and Abaqus/Explicit to compare the performance and to determine advantages of using one procedure over the other. Both Abaqus/Standard and Abaqus/Explicit were able to successfully predict the overall deformed shape of the vessel accurately. It was also observed that the guidewire has a tendency to significantly deform the native vessels specifically around sharp bends in the iliac resulting in reduced tortuosity.

Subscribe to Comments for "Investigation of Interaction between Guidewire and Native Vessel Using Finite Element Analysis"

Recent comments

More comments


Subscribe to Syndicate