EP0775472A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Expandable stent graft covered with expanded polytetrafluoroethylene
Assignee: Schneider USA Inc
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Filing: 1996-11-20
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Granted: —
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Expires: 2016-11-20
Abstract
Abstract The expandable stent-graft generally defines a cylindrical lumen made from a stent having a discontinuous wall that is at least substantially covered with an expanded polytetrafluoroethylene material. The expanded polytetrafluoroethylene covering may be a biaxially oriented, expanded polytetrafluoroethylene material having nodules and longitudinal and circumferential fibrils or a uniaxially oriented, expanded polytetrafluoroethylene material. The expandable stent-graft expands and compresses in association with the stent structure as it is contracted and expanded.
Inventors
- 👤 Paul J. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 07:36
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/22; A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61L; A61L31/00; A61L31/08; A61L31/10; B29D; B29D23/00; B29D23/001; A61F2/82; A61F2/86; A61F2/90; A61F2002/072; A61F2002/075; A61F2210/00; A61F2210/0057; A61F2230/00; A61F2230/0063; A61F2230/0073; A61F2230/0078; A61F2250/00; A61F2250/0014; A61F2250/0028; A61F2250/0039; A61F2250/0058; A61F2250/006; A61F2250/0063; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29K2995/00; B29K2995/0037; B29K2995/005; B29K2995/0051; B29K2995/0053
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
85 words
An expandable prosthesis comprising: (a) a discontinuous wall defining a lumen adapted to assume a longitudinally contracted position and a longitudinally expanded position; and (b) at least one layer of expanded polytetrafluoroethylene having a first average longitudinal inter-nodule distance in a free state, the layer of polytetrafluoroethylene affixed to the wall such that it has a second average longitudinal inter-nodule distance when the wall is in the longitudinally contracted position, the second average longitudinal inter-nodule distance being less than the first average longitudinal inter-nodule distance.
Claim 2
Dependent Claim
59 words
The prosthesis of claim 1 wherein the layer of expanded polytetrafluoroethylene has (i) an average longitudinal inter-nodule distance of between about 0 and about 50 microns when the wall is in the longitudinally contracted position, and (ii) an average longitudinal inter-nodule distance of between about 50 and about 150 microns when the wall is in the longitudinally expanded position.
Claim 3
Dependent Claim
35 words
The prosthesis of claim 2 wherein the layer of expanded polytetrafluoroethylene has (i) an average longitudinal inter-nodule distance when the wall is in the longitudinally contracted position of between about 5 and about 45 microns.
Claim 4
Dependent Claim
35 words
The prosthesis of claim 3 wherein the layer of expanded polytetrafluoroethylene has (i) an average longitudinal inter-nodule distance when the wall is in the longitudinally contracted position of between about 20 and about 30 microns.
Claim 5
Dependent Claim
35 words
The prosthesis of claim 2 wherein the layer of expanded polytetrafluoroethylene has (ii) an average longitudinal inter-nodule distance when the wall is in the longitudinally expanded position of between about 60 and about 140 microns.
Claim 6
Dependent Claim
35 words
The prosthesis of claim 5 wherein the layer of expanded polytetrafluoroethylene has (ii) an average longitudinal inter-nodule distance when the wall is in the longitudinally expanded position of between about 80 and about 120 microns.
Claim 7
Dependent Claim
87 words
An expandable prosthesis comprising: (a) a discontinuous wall defining a lumen adapted to assume a radially contracted position and a radially expanded position; and (b) at least one tubular layer of an expanded polytetrafluoroethylene having a first average circumferential inter-nodule distance in a free state, the layer of polytetrafluoroethylene affixed to the wall such that it has a second average circumferential inter-nodule distance when the wall is in the radially contracted state, the second average circumferential inter-nodule distance being less than the first average circumferential inter-nodule distance.
Claim 8
Dependent Claim
60 words
The prosthesis of claim 7 wherein the tubular layer of expanded polytetrafluoroethylene has (i) an average circumferential inter-nodule distance of between about 0 and about 75 microns when the wall is in the radially contracted position, and (ii) an average circumferential inter-nodule distance of between about 75 and about 150 microns when the wall is in the radially expanded position.
Claim 9
Dependent Claim
36 words
The prosthesis of claim 8 wherein the tubular layer of expanded polytetrafluoroethylene has (i) an average circumferential inter-nodule distance of between about 5 and about 70 microns when the wall is in the radially contracted position.
Claim 10
Dependent Claim
36 words
The prosthesis of claim 9 wherein the tubular layer of expanded polytetrafluoroethylene has (i) an average circumferential inter-nodule distance of between about 20 and about 50 microns when the wall is in the radially contracted position.
Claim 11
Dependent Claim
36 words
The prosthesis of claim 8 wherein the tubular layer of expanded polytetrafluoroethylene has (ii) an average circumferential inter-nodule distance of between about 80 and about 140 microns when the wall is in the radially expanded position.
Claim 12
Dependent Claim
36 words
The prosthesis of claim 11 wherein the tubular layer of expanded polytetrafluoroethylene has (ii) an average circumferential inter-nodule distance of between about 80 and about 120 microns when the wall is in the radially expanded position.
Claim 13
Dependent Claim
84 words
An expandable prosthesis comprising: (a) a discontinuous wall generally defining a lumen adapted to assume a longitudinally expanded position and a longitudinally contracted position; and (b) at least one layer of expanded polytetrafluoroethylene having a first average longitudinal inter-nodule distance in a free state, the layer of polytetrafluoroethylene affixed to the wall such that the polytetrafluoroethylene has a second average longitudinal inter-nodule distance between 0 and 99 percent of the first average longitudinal inter-nodule distance when the wall is in the longitudinally contracted position.
Claim 14
Dependent Claim
36 words
The prosthesis of claim 13 wherein the second average longitudinal inter-nodule distance is between about 20 and about 50 percent of the first average longitudinal inter-nodule distance when the wall is in the longitudinally contracted position.
Claim 15
Dependent Claim
84 words
An expandable prosthesis comprising: (a) a discontinuous wall generally defining a lumen adapted to assume a radially expanded position and a radially contracted position; and (b) at least one layer of expanded polytetrafluoroethylene having a first average circumferential inter-nodule distance in a free state, the layer of polytetrafluoroethylene affixed to the wall such that the polytetrafluoroethylene has a second average circumferential inter-nodule distance less than about 50 percent of the first average circumferential inter-nodule distance when the wall is in the radially contracted position.
Claim 16
Dependent Claim
34 words
The prosthesis of claim 15 wherein the second average circumferential inter-nodule distance is less than about 25 percent of the first average circumferential inter-nodule distance when the wall is in the radially contracted position.
Claim 17
Dependent Claim
119 words
An expandable prosthesis comprising: (a) a discontinuous wall defining a lumen adapted to assume a radially expanded position and a radially contracted position; and (b) at least one layer of expanded polytetrafluoroethylene having a first average longitudinal inter-nodule distance and a first average circumferential inter-nodule distance in a free state, the layer of the polytetrafluoroethylene affixed to the wall such that the polytetrafluoroethylene has a second average longitudinal inter-nodule distance between 0 and 99 percent of the first average longitudinal inter-nodule distance when the wall is in the radially expanded position and a second average circumferential inter-nodule distance less than about 50 percent of the first average circumferential inter-nodule distance when the wall is in the radially contracted position.
Claim 18
Dependent Claim
47 words
The prosthesis of claim 17 wherein the second average longitudinal inter-nodule distance is between about 20 and about 50 percent of the first average longitudinal inter-nodule distance, and the second average circumferential inter-nodule distance is less than about 25 percent of the first average circumferential inter-nodule distance.
Claim 19
Dependent Claim
108 words
An expandable stent-graft comprising: (a) a braided self-expanding stent characterized by a longitudinal shortening upon radial expansion from a first longitudinal stent length to a second longitudinal stent length; and (b) at least one tubular layer of biaxially oriented expanded polytetrafluoroethylene comprising nodules and fibrils affixed to the stent characterized by a shortening of average longitudinal inter-nodule distance upon radial expansion from a first average longitudinal inter-nodule distance to a second average longitudinal inter-nodule distance; wherein the ratio of first longitudinal stent length to second longitudinal stent length is within about 25 percent of the ratio of first average longitudinal inter-nodule distance to a second average inter-nodule distance.
Claim 20
Dependent Claim
39 words
An expandable stent-graft comprising: (a) a braided self-expanding stent characterized by a longitudinal shortening upon radial expansion; (b) at least one layer of uniaxially oriented expanded polytetrafluoroethylene affixed to the stent, the polytetrafluoroethylene characterized by having substantially no nodules.
Claim 21
Independent Claim
123 words
A method of making an expandable prosthesis comprising: (a) providing a self-expanding braided stent having a longitudinal orientation in an at least partially radially expanded state; (b) providing at least one layer of expanded polytetrafluoroethylene having a longitudinal orientation and a first average longitudinal inter-nodule distance in a free state; (c) longitudinally compressing the layer of expanded polytetrafluoroethylene so that the resulting longitudinally compressed layer has a second average longitudinal inter-nodule distance which is less than the first average longitudinal inter-nodule distance; and (d) affixing the longitudinally compressed layer of expanded polytetrafluoroethylene to the self-expanding braided stent in the at least partially radially expanded state such that the longitudinal orientations of the stent and layer of expanded polytetrafluoroethylene substantially correspond with one another.
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