Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 419, Issue 1-2, Pages 131-137Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2005.12.016
Keywords
stent graft; self-deployable structure; Ni-rich TiNiSMA foil; photochemical etching
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Funding
- Engineering and Physical Sciences Research Council [EP/C51937X/1] Funding Source: researchfish
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This paper describes the design, manufacturing and properties of a new type of stent graft, the origami stent graft. Unlike conventional stent grafts which consist of a wire mesh stent and a covering membrane, the new origami stent graft is made from a single foldable foil with hill and valley folds. The Ni-rich titanium/nickel (TiNi) shape memory alloy (SMA) foil made by the newly developed ultrafine laminates method was used in order to produce the stent graft. The pattern of folds on the foil was produced by negative photochemical etching. The deployment of the stent graft is achieved either by SMA effect at the body temperature or by making use of property of superelasticity. A number of prototypes of the stent graft, which are the same size as standard oesophageal and aortal stent grafts, have been produced successfully. It was demonstrated that the stent graft deploy as expected. (c) 2006 Elsevier B.V. All rights reserved.
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