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- Title
Microfabricated Nitinol Stent Retrievers with a Micro-Patterned Surface.
- Authors
Kato, Shogo; Ban, Yuzuki; Ota, Takashi; Miki, Norihisa
- Abstract
Stent retrievers are medical devices that are designed to physically remove blood clots from within the blood vessels of the brain. This paper focuses on microfabricated nitinol (nickel–titanium alloy) stent retrievers, which feature micro-patterns on their surface to enhance the effectiveness of mechanical thrombectomy. A thick film of nitinol, which was 20 µm in thickness, was sputtered onto a substrate with a micro-patterned surface, using electroplated copper as the sacrificial layer. The nitinol film was released from the substrate and then thermally treated while folded into a cylindrical shape. In vitro experiments with pig blood clots demonstrated that the micro-patterns on the surface improved the efficacy of blood clot retrieval.
- Subjects
NICKEL-titanium alloys; THROMBOSIS; COPPER films; COPPER; THICK films; BLOOD vessels; TITANIUM alloys
- Publication
Micromachines, 2024, Vol 15, Issue 2, p213
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi15020213