Tubular medical endoprostheses
First Claim
1. A tubular prosthesis device for use within the body comprised of a metal filament material formed of a metal outer member of extended length having an exposed outer surface, and a core within said extended outer member comprising a different metal than said outer member, said core being secured within and substantially enclosed by said outer member, said device being capable of reduction to a small size for introduction into said body lumen and expandable to a sufficiently large size to engage the wall of said body lumen.
4 Assignments
0 Petitions
Accused Products
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.
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Citations
30 Claims
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1. A tubular prosthesis device for use within the body comprised of a metal filament material formed of a metal outer member of extended length having an exposed outer surface, and
a core within said extended outer member comprising a different metal than said outer member, said core being secured within and substantially enclosed by said outer member, said device being capable of reduction to a small size for introduction into said body lumen and expandable to a sufficiently large size to engage the wall of said body lumen.
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13. A self-expanding tubular prosthesis device for use within the body comprised of loosely interlocked knitted loops of a metal filament material formed of an elastic material capable of deflection without plastic deformation to produce a self-restoring force, said filament material comprising an elastic metal outer member of extended length and an exposed outer surface, and
a core comprising a different metal than said outer member, said core being secured within and substantially enclosed by said outer member, said device being capable of reduction to a small size for introduction into said body lumen and expandable by said internal restoring force to a sufficiently large size to engage the wall of said body lumen.
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25. A medical stent device capable of placement or manipulation in the body by means external of the body under guidance of a fluoroscope, said device comprised at least in part of an elongated filament-form metal member adapted to be subjected to elastic deformation to enable the device to be forced into a characteristic deformed configuration during a stage of use and to elastically self-recover from said deformation when deformation forces are relieved, said filament-form metal member comprised of a core of a first metal of a first selected thickness and an intimately surrounding sheath of a second selected metal of a second thickness, said first metal being a high density metal that demonstrates characteristic relatively high radiopacity and said second metal being a lower density metal having substantially more elasticity than said first metal, the combined effect of the selected thicknesses of said first and second metals in said filament-form member serving to enhance the radio-opacity of said filament-form member to provide improved fluoroscopic or x-ray visualization of said filament-form member in the body while imparting sufficient elasticity to enable the filament-form member to elastically self-recover from its characteristic deformed configuration.
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29. A tubular endoprosthesis device for use within the body comprised of a metal member formed in tubular shape, wherein said metal member has a cross-sectional thickness of about 0.015 inch or less and is composed of at least two-different metals, including an exposed outer metal having select mechanical properties and an inner metal encompassed within said outer metal, said inner metal having a relatively high density compared to said outer metal for enhancing the radiopacity of said endoprosthesis.
Specification