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.
3 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.
-
Citations
30 Claims
-
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.
-
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.
- 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.
- 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