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EP0441516B1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Inflatable stent

Assignee: MTG Divestitures LLC
•
Filing: 1991-01-29
•
Granted: 1995-03-29
•
Expires: 2011-01-29
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Abstract

Abstract A stent for placement within a body lumen and comprising a wall structure wherein at least a portion thereof is a hollow wall. The hollow wall has disposed therein a hydrophilic material which can be in the form of a gel, for example, which swells upon introduction of a liquid into the hollow wall to thereby achieve inflation thereof. The hollow wall is fabricated of a semi-permeable membrane whereby fluid from tissues surrounding the stent at the site of placement can pass through the membrane and swell the hydrophilic material to thereby inflate the hollow wall. A drug can be disposed with the hydrophilic material for release through the membrane at the site of stent placement. The entire wall structure of the stent can be a hollow wall, or the wall structure can incorporate both hollow and non-hollow wall portions such as hollow and solid fibers which are braided, woven or wound together.

Inventors

  • 👤 Thomas A. Silvestrini

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 14:18
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/90; A61F2/91; A61F2002/825; A61F2250/00; A61F2250/0003; A61F2250/0058; A61F2250/0067; A61M; A61M25/00; A61M25/10; A61M25/1002

Claims Analysis

Total Claims: 19
Claim 1
Independent Claim 38 words
A stent for placement within a body lumen, the stent comprising a wall structure wherein at least a portion thereof is a hollow wall (12), characterized in that the hollow wall (12) is fabricated from a semi-permeable membrane.
Claim 2
Dependent Claim 32 words
A stent as claimed in claim 1 wherein the hollow wall (12) has disposed therein a hydrophilic material (32) capable of absorbing a liquid to thereby increase the volume of said material.
Claim 3
Dependent Claim 15 words
A stent as claimed in claim 2 wherein the hydrophilic material (32) is a gel.
Claim 4
Dependent Claim 14 words
A stent (10) as claimed in claim 2 wherein the configuration thereof is tubular.
Claim 5
Dependent Claim 17 words
A stent (10) as claimed in claim 4 wherein the hollow wall (12) comprises a balloon (18).
Claim 6
Dependent Claim 21 words
A stent (10) as claimed in claim 5 wherein the hollow wall (12) has a plurality of radial openings (16) therethrough.
Claim 7
Dependent Claim 21 words
A stent (10) as claimed in claim 2 wherein the hollow wall (12) has a plurality of radial openings (16) therethrough.
Claim 8
Dependent Claim 26 words
A stent (20) as claimed in claim 2 wherein the hollow wall (24) comprises hollow fibers (26) held together by being braided, woven or wound together.
Claim 9
Dependent Claim 31 words
A stent (40) as claimed in claim 8 wherein the wall structure additionally comprises solid fibers (28) held together with the hollow fibers (26) by being braided, woven or wound together.
Claim 10
Dependent Claim 17 words
A stent as claimed in claim 2 wherein the hydrophilic material (32) has disposed therewith a drug.
Claim 11
Dependent Claim 15 words
A stent as claimed in claim 10 wherein the hydrophilic material (32) is a gel.
Claim 12
Dependent Claim 17 words
A stent (10) as claimed in claim 10 wherein the hollow wall (12) comprises a balloon (18).
Claim 13
Dependent Claim 26 words
A stent (20) as claimed in claim 10 wherein the hollow wall (24) comprises hollow fibers (26) held together by being braided, woven or wound together.
Claim 14
Dependent Claim 31 words
A stent (40) as claimed in claim 13 wherein the wall structure additionally comprises solid fibers (28) held together with the hollow fibers (26) by being braided, woven or wound together.
Claim 15
Dependent Claim 17 words
A stent (50) as claimed in claim 2 wherein the configuration thereof when inflated is a spiral.
Claim 16
Dependent Claim 17 words
A stent (50) as claimed in claim 15 wherein the hollow wall (52) comprises a balloon (54).
Claim 17
Dependent Claim 20 words
A stent (50) as claimed in claim 16 wherein at least a portion of the hollow wall (52) is reinforced.
Claim 18
Dependent Claim 16 words
A stent (50) as claimed in claim 15 wherein the hydrophilic material (32) is a gel.
Claim 19
Dependent Claim 18 words
A stent (50) as claimed in claim 18 wherein the hydrophilic material (32) has disposed therewith a drug.

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