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EP0183372A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Prosthetic stent

Assignee: Raychem Corp
•
Filing: 1985-10-18
•
Granted: —
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Expires: 2005-10-18
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Abstract

Abstract A prosthetic stent (20) for internal support of a bodily duct such as a blood vessel (10) or other passage which may be collapsed for insertion into a duct and then expanded to provide active internal support for the duct. The stent (20) comprises a flexible generally tubular body of braided filaments having a first configuration (26) that is radially expanded and axially shortened and having a second configuration (28) which is radially contracted and axially lengthened and having means for biasing the tubular body from said second configuration (28) towards said first configuration (26). In one embodiment, the means for biasing the tubular body comprises the braided filaments themselves, the filaments having been annealed to a rest geometry in the first configuration (26). In another embodiment, means for biasing comprises a plurality of warp filaments that are longitudinally woven into the braided filaments to provide a frictional interface with respect to the various filaments. In yet other embodiments, elastic or heat-recoverable, shrinkable warp filaments are utilized.

Inventors

  • 👤 Dennis A. Caponigro

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-22 23:00
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/95; A61F2/958; A61L; A61L31/00; A61L31/04; A61L31/06; A61F2002/825; A61F2250/00; A61F2250/0014; A61F2250/0039

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 74 words
l. A prosthetic stent which may be collapsed for insertion into a bodily duct and then expanded to provide active internal support to the duct, comprising: a flexible, generally tubular body of braided filaments, said body having a first configuration that is radially expanded and axially shortened, and having a second configuration that is radially contracted and axially lengthened; and means for biasing said tubular body from said second configuration towards said first configuration.
Claim 2
Dependent Claim 25 words
A stent as in claim 1 wherein said means for biasing comprises braided filaments which are annealed to a rest geometry in the first configuration.
Claim 3
Dependent Claim 34 words
A stent as in claim 1 or 2, wherein said means for biasing comprises a plurality of warp filaments longitudinally woven into the braided filaments generally parallel to the axis of said tubular body.
Claim 4
Dependent Claim 27 words
A stent as in claim 3 wherein the warp filaments frictionally interface with respect to the braided filaments when the tubular body is in said first configuration.
Claim 5
Dependent Claim 14 words
A stent as in claim 3 or 4, wherein the warp filaments are shrinkable.
Claim 6
Dependent Claim 30 words
A stent as in claim 3, 4 or 5, wherein the warp fiia-- ments are shrinkable and are secured at their ends to the respective ends of the tubular body.
Claim 7
Dependent Claim 20 words
A stent as in any one of claims 3 to 6 wherein the warp filaments are elastic, and/or heat recoverable.
Claim 8
Dependent Claim 16 words
A stent as in any preceding claim, wherein said braided filaments are receptive to tissue ingrowth.
Claim 9
Dependent Claim 16 words
A stent as in any preceding claim, wherein said " braided filaments are non-thrombogenic, or non-hemolytic.
Claim 10
Dependent Claim 20 words
A stent as in any preceding claim, wherein the diameter of the tubular body varies along the axial length thereof.
Claim 11
Dependent Claim 20 words
A stent as in any preceding claim wherein said braided filaments are bioerodable, and preferably are made from catgut material.
Claim 12
Dependent Claim 26 words
A stent as in any preceding claim, wherein the braided filaments are made from a thermoplastic polyester material, or- from a thermoplastic soft segment polyurethane material.
Claim 13
Dependent Claim 46 words
A prosthetic stent according to any preceding chain, for use in a method of providing internal support to a bodily duct, in which method the stent is collapsed to insert it into the bodily duct and then expanded to provide active internal support for the duct.

References Cited (Backward Citations)

GB1205743A Cited
US3868956A Cited
US4434797A Cited
US4448195A Cited
WO1983003752A1 Cited

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