Tubular medical endoprostheses
AssigneeBoston Scientific Corporation
InventorKevin R. Heath
Life of this patent
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Abstract
A tubular prosthesis device for use within the body. The device includes, a metal filament material formed of metal outer member having an exposed outer surface and a core within the extended outer member formed of a different metal than the outer member. The core is secured within and substantially enclosed by the outer member. The device can be reduced to a small size for introduction into the body lumen and expandable to a sufficiently large size to engage the wall of the body lumen. Stents formed of composite wires are shown.
Claims26
A self-expanding implantable tubular medical stent device, comprising;
- a catheter carrying a stent, said stent being elastically compressed to a small diameter for delivery into a body and capable of being elastically expanded to a larger diameter, said stent being formed of metal wire configured to substantially define a tube when said stent is expanded to said larger diameter, said wire composed of a core and a sheath surrounding said core, said core being formed of a first metal and said sheath being formed of a second metal, the first metal having greater density than the second metal and the second metal having greater elasticity than the first metal.
A self-expanding implantable tubular medical stent comprising metal wire configured to substantially define a tube when said stent is expanded, said wire composed of a core and a sheath surrounding said core, said core being formed of a first metal and said sheath being formed of a second, different metal, said first metal having greater density than the second metal and being selected from the group consisting of tantalum, platinum, tungsten and irridiun.
Dependencies are inferred from the claim text.