Related Experiment Video
Updated: Jun 24, 2026
Novel and Innovative Hybrid Technique for Type A Aortic Dissection
Published on: March 28, 2025
Auxetic Stents as a Next Generation Solution for Vascular Diseases-A Review
Khanish Gupta1, Kusum Meena2, S H Chandrashekhara3
1Indian Institute of Technology Delhi, New Delhi, India.
Insights
Auxetic stents, featuring a negative Poisson
Area of Science:
- Biomedical Engineering
- Materials Science
- Cardiovascular Research
Background:
- Atherosclerosis and vascular diseases are major global health concerns, with endovascular stenting being a primary treatment.
- Conventional stents have limitations like restenosis, thrombosis, and mechanical failure due to their positive Poisson's ratio design, causing foreshortening and vascular mismatch.
Purpose of the Study:
- To review auxetic stents, a novel stent design with a negative Poisson's ratio, as a potential solution to conventional stent limitations.
- To evaluate the biomechanical and biological advantages of auxetic stents over traditional designs.
Main Methods:
- Critical review of existing in-silico (computational modeling) and in-vitro (bench-top) evidence.
- Analysis of the structural properties and mechanical behavior of auxetic stent designs.
- Exploration of the hypothesized biological implications, including endothelialization and neointimal hyperplasia.
Main Results:
- Auxetic stents exhibit superior biomechanical characteristics, including axial expansion upon radial deployment, eliminating foreshortening.
- The negative Poisson's ratio enhances conformability to tortuous vessels and promotes uniform stress distribution on the arterial wall.
- Optimized mechanical environment and hemodynamics are expected to reduce neointimal hyperplasia and promote endothelialization.
Conclusions:
- Auxetic stents offer a promising paradigm shift in endovascular therapy, moving from material-centric to structure-driven innovation.
- Further research and development are needed for successful clinical translation, addressing challenges in structure integration.
- Auxetic structured stents hold potential for improved long-term safety and efficacy in various vascular and non-vascular applications.
Objective:
Vascular diseases, particularly atherosclerosis, represent a leading cause of global morbidity and mortality. Endovascular stenting has emerged as a cornerstone of therapy to restore vessel patency, yet conventional stents remain obstructed by significant clinical limitations, including in-stent restenosis, thrombosis, and mechanical failure. These adverse outcomes are intrinsically linked to their fundamental structural design, which is characterized by a positive Poisson's ratio, leading to foreshortening and a biomechanical mismatch with the native vasculature.
Methods:
This review critically examines auxetic stents as a next-generation solution, engineered with a structure possessing a negative Poisson's ratio. This unique property allows them to expand axially upon radial deployment, thereby eliminating foreshortening, enhancing conformability to tortuous vessels, and distributing mechanical stress more uniformly onto the arterial wall.
Results:
This paper synthesizes the robust body of in-silico/bench-top evidence from computational modeling and in-vitro experimentation that validates these superior biomechanical characteristics. Furthermore, it explores the profound and favorable biological implications, arguing that the optimized mechanical environment and improved hemodynamics are hypothesized to attenuate the primary triggers for neointimal hyperplasia and foster rapid, complete endothelialization.
Conclusion:
The review concludes by outlining the translational pathway, including challenges in structure integration and discussing the vast future horizons for auxetic structured stents in complex peripheral, carotid, and non-vascular applications. Auxetic design represents a paradigm shift from material-centric iteration to structure-driven innovation, holding the promise to significantly improve the long-term safety and efficacy of endovascular stent implants.
