Biliary stent
AssigneeBVW Holding AG
InventorsLukas Bluecher, Michael Milbocker
Life of this patent
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Abstract
The present disclosure provides an endoprosthesis where a preferably polymeric coating has a number of surface features such as protrusions or textures that are arranged in a micropattern. The endoprosthesis optionally has an expanded state and a contracted state, and in some cases includes a stent with a polymeric coating attached to an outer surface of the stent. The stent may have an inner surface defining a lumen, an outer surface, and a stent thickness defined between the inner surface and outer surface. The stent may comprise a plurality of surface textures extending from the stent surfaces, wherein the textures are arranged in a macropattern.
Claims20
An endoprosthesis for placement in a body lumen comprising:
- a tubular member having a body comprising an interior surface and an exterior surface, at least a portion of the exterior surfacing having disposed thereon a polymer coating, wherein the polymer coating comprises a surface having a first hierarchical microstructure pattern having a first pattern geometry comprising at least a first microtexture and at least a second microtexture;
- the at least first microtexture being hierarchically disposed about the at least second microtexture such that the first hierarchical microstructure pattern is configured to develop a Wenzel interface and a Cassie interface when in contact with a wet surface;
- and
- the interior surface of the body comprises a second hierarchical microstructure pattern having a second pattern geometry wherein the second pattern geometry is different than the first pattern geometry and does not develop a Wenzel interface and a Cassie interface when in contact with a wet surface.
An endoprosthesis for placement in a body lumen, the endoprosthesis comprising:
- a tubular member having a body comprising an inner surface and an outer surface, at least a portion of the outer surface having disposed thereon a polymer coating, wherein the polymer coating is arranged in a concentric pattern around the outer surface, the polymer coating comprising an exterior surface having a first hierarchical microstructure pattern having a first pattern geometry comprising at least a first microtexture and at least a second microtexture, the at least first microtexture being hierarchically disposed about the at least second microtexture such that the first hierarchical microstructure is configured to develop a Wenzel Cassie interface when interacting with a wet surface;
- the inner surface of the body comprises a second hierarchical microstructure pattern having a second pattern geometry wherein the second pattern geometry is different than the first pattern geometry and does not develop a Wenzel interface and a Cassie interface when in contact with a wet surface.
Dependencies are inferred from the claim text.