Self Expanding Stent Finite Element Analysis
Date Issued
2011
Date
2011
Author(s)
Tee, Yu-Seng
Abstract
Cardiovascular disease is the world''s leading cause of death. Stenting is the minimally-invasive method of opening blocked arteries to restore blood flow and has become the primary treatment for vascular diseases. When making an intravascular stent, a 2-D stent design is first sketched and then the CAM-coded stent geometry is fed into the laser machine to cut the designed stent patterns. The manufactured stents are then tested to evaluate whether the stent performance matches the design intents. Each design iteration could take days to weeks to complete, which is time-consuming and inefficient. In this study, we propose to apply the parametric design concept into the stent design and combine with Finite Element Analysis (FEA) to shorten the stent development cycle. Several Finite Element models was developed which are able to predict the mechanical behavior of self expanding stents during manufacturing, in vivo deployment, and service life in human body subjected to pulsatile blood pressure. Results show that a modified stent drawing can be completed in just a few seconds and many inappropriate designs can be screened out by FEA analysis without going into subsequent lengthy testing process. This work will help to achieve stent optimization within a very short time compared with the traditional approaches without parametric stent design and/or FEA models.
Subjects
Self Expanding Stent
Finite Element Analysis
Nitinol
SDGs
Type
thesis
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