Cardiovascular diseases remain one of the leading causes of death worldwide and place a major burden on healthcare systems. Millions of patients each year require vascular interventions involving stents to restore blood flow in narrowed or blocked blood vessels. Despite their widespread use, conventional metallic stents remain passive devices that cannot be actively controlled after implantation. They also face persistent challenges including restenosis, limited adaptability to complex vascular geometries, and restricted capability for localized therapeutic intervention. Recent advances in soft materials, magnetic nanotechnology, and microfabrication have created opportunities to develop next-generation biomedical devices that are more responsive, adaptable, and patient-specific. However, significant scientific barriers remain. Existing magnetic soft robotic systems often suffer from limited mechanical robustness, insufficient magnetic responsiveness, poor reproducibility of magnetic materials, and a lack of scalable design methodologies that connect material properties with device performance.
The MagStents project was established to address these challenges through the development of magnetically responsive soft stent technologies based on engineered magnetic nanomaterials, magnetic hydrogels, and auxetic architectures. The project aimed to create an integrated design platform capable of combining magnetic actuation, soft-material mechanics, and advanced microfabrication into a single biomedical device concept. Particular emphasis was placed on achieving precise remote actuation through externally applied magnetic fields while maintaining the flexibility and compliance required for minimally invasive vascular applications. The project pathway to impact was based on three sequential stages. First, a reproducible library of ferrite magnetic nanoparticles with tunable magnetic properties was developed to provide controlled magnetic torque generation. Second, these nanoparticles were incorporated into dual-crosslinked magnetic hydrogels to create mechanically stable and magnetically responsive materials suitable for biomedical actuation. Third, computational modelling and advanced microfabrication approaches were employed to design auxetic stent architectures capable of controlled deformation under magnetic stimuli.
During the reporting period, the project successfully established the materials platform and design framework required for future magnetically actuated stent systems. Although the fellowship ended before biofluid testing and drug-release studies could begin, the completed work generated critical scientific knowledge, validated materials technologies, and fabrication methodologies that significantly advance the development of remotely controllable soft biomedical devices. The results provide a technological foundation for future vascular implants, soft robotic medical devices, and magnetically controlled therapeutic platforms that could ultimately contribute to safer, less invasive, and more personalized healthcare solutions.
