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Updated: Jun 3, 2026
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Fabrication of Small Caliber Stent-grafts Using Electrospinning and Balloon Expandable Bare Metal Stents
Published on: October 26, 2016
Microfabrication and nanotechnology in stent design
Adam W Martinez1, Elliot L Chaikof
1Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, GA, USA.
Summary
Drug-eluting stents reduce restenosis but can impair vessel healing. Novel microfabrication and nanotechnology offer promising solutions to overcome current stent limitations and improve vascular healing.
Area of Science:
- Cardiovascular Medicine
- Biomaterials Science
- Medical Device Engineering
Background:
- Intravascular stents, introduced in the 1980s, improved angioplasty outcomes but faced high restenosis rates.
- Drug-eluting stents (DES) were developed to mitigate restenosis by delivering anti-proliferative agents, significantly reducing its incidence.
- Despite DES advancements, challenges persist, including incomplete endothelial repair and potential late stent thrombosis, linked to polymeric coatings and eluted drugs.
Purpose of the Study:
- To review the evolution of intravascular stent technology, focusing on strategies to improve vascular healing.
- To explore the role of microfabrication and nanotechnology in addressing limitations of current stent platforms.
- To highlight novel approaches for enhancing stent performance and reducing adverse vascular responses.
Main Methods:
- Review of existing literature on intravascular stent development, drug-eluting stent technology, and vascular healing.
- Analysis of microfabrication techniques and nanotechnologies applied to stent design and material science.
- Discussion of the impact of stent materials, coatings, and design features on vascular wall healing and thrombotic risk.
Main Results:
- Drug-eluting stents have substantially decreased restenosis but may compromise endothelial repair and increase late thrombosis risk.
- Polymeric stent coatings and eluted drugs are implicated in impaired vessel wall healing.
- Novel microfabrication processes and advanced materials show potential for improving stent biocompatibility and performance.
Conclusions:
- Current stent technologies, while effective against restenosis, present challenges in achieving complete vascular healing.
- Microfabrication and nanotechnology offer innovative pathways to develop next-generation stents with enhanced biocompatibility and reduced thrombotic risk.
- Future stent designs must prioritize not only efficacy in preventing restenosis but also promoting optimal vessel wall repair.
