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Fabrication of Small Caliber Stent-grafts Using Electrospinning and Balloon Expandable Bare Metal Stents
Published on: October 26, 2016
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A multi-objective optimization of degradable polymer vascular stents.
Mingkai Liang1,2, Ruiqi Zhang3, Yuanming Gao2,4
1Innovation Center for Medical Engineering & Engineering Medicine, Hangzhou International Innovation Institute, Beihang University, Hangzhou, China.
Summary
This study optimized degradable polymer stents to overcome insufficient support and fractures. The optimized design significantly improved mechanical support and effective working time, offering a promising strategy for enhanced stent performance.
Area of Science:
- Biomaterials Engineering
- Medical Device Design
- Polymer Science
Background:
- Degradable polymer stents present challenges in mechanical support and premature fracture.
- Existing designs often compromise between mechanical integrity and degradation profiles.
Purpose of the Study:
- To enhance both mechanical support and degradation performance of polymer stents.
- To develop an optimization strategy for improved stent functionality.
Main Methods:
- Multi-objective structural optimization using three design variables.
- Development of surrogate models (Radial Basis Function - RBF) to predict performance.
- Application of a genetic algorithm to identify optimal design parameters.
Main Results:
- The optimized polymer stent demonstrated a 52.1% increase in support force (F).
- Effective working time (EWT) was enhanced by 27.4% in the optimized design.
- Radial Basis Function (RBF) surrogate model showed high accuracy with prediction errors under 4%.
Conclusions:
- The study presents an effective optimization strategy for polymer stent design.
- Improved mechanical and degradation performance was achieved through multi-objective optimization.
- The findings suggest a viable approach to enhance the clinical performance of degradable polymer stents.
