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US 7,077,837 B2Granted
Multi-layered radiopaque coating on intravascular devices
AssigneeImplant Sciences Corporation
InventorRichard Sahagian
Life of this patent
Estimating the term…
Abstract
Intravascular devices having a radiopaque layer thereon for visualization are provided. The devices further includes a capping layer on the radiopaque layer to prevent exposure of the radiopaque material to surrounding tissues. A method of coating the device is also provided. The method includes using an unbalanced magnetic field magnetron to generate, from a source, metal atoms for coating and bombarding ions for compressing deposited metal atoms to the surface of the device.
Claims24
An intravascular device comprising:
- a substrate surface;
- a layer of a radiopaque material on the substrate surface and having a thickness sufficient to permit visualization;
- a capping layer positioned on the layer of radiopaque material to prevent exposure of the layer of radiopaque material to surrounding tissue;
- and
- at least one adhesion layer disposed between the radiopaque material and the substrate surface, wherein a first part of the adhesion layer adjacent to the substrate surface has a different composition than a combination of the radiopaque material and a material in the substrate surface and wherein a second part of the adhesion layer adjacent to the layer of radiopaque material has a combination of the material used for the first part of the adhesion layer and the radiopaque material.
2 more elements
An intravascular stent comprising:
- a flexible expandable body having a surface;
- a layer of a radiopaque material on the surface and having a thickness sufficient to permit visualization;
- an adhesion layer between the layer of radiopaque material and the surface to enhance bonding between the layer of radiopaque material and the surface;
- and
- a capping layer positioned on the layer of radiopaque material to prevent exposure of the layer of radiopaque material to surrounding tissue, wherein a first part of the adhesion layer adjacent to the flexible expandable body has a different composition than a combination of the radiopaque material and a material in the flexible expandable body and wherein a second part of the adhesion layer adjacent to the layer of radiopaque material has a combination of the material used for the first part of the adhesion layer and the radiopaque material.
2 more elements
Dependencies are inferred from the claim text.