US6325820B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coiled-sheet stent-graft with exo-skeleton
Assignee: Boston Scientific Scimed Inc
•
Filing: 1998-11-16
•
Granted: 2001-12-04
•
Expires: 2018-11-16
Abstract
Abstract A stent-graft having an exo-skeleton attached to a tubular graft, the tubular graft having a peripheral wall defining a lumen therein extending between first and second ends. The exo-skeleton may assume contracted and enlarged conditions, and includes one or more serpentine elements, each extending both peripherally and axially along at least a portion of the peripheral wall. Coiled-sheet stents are provided on the ends of the tubular graft for anchoring the ends within a body passage. Each serpentine element is a zigzag structure extending peripherally about the peripheral-wall, with a plurality of serpentine elements distributed axially along the peripheral wall. The serpentine elements are individually attached to the peripheral wall and/or connector elements may extend between adjacent serpentine elements. Alternatively, each serpentine element may define a generally sinusoidal shape extending axially along the peripheral wall. The tubular graft may have a bifurcated end from which a tubular graft extension segment may extend and to which a docking limb may be attached. A plurality of serpentine elements may also be attached to the extension segment and the docking limb.
Inventors
- 👤 Farhad Khosravi
- 👤 Himanshu N. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:34
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/82; A61F2/92; A61F2/848; A61F2/86; A61F2/89; A61F2/90; A61F2/91; A61F2/915; A61F2/95; A61F2/958; A61F2002/065; A61F2002/072; A61F2002/075; A61F2002/8486; A61F2220/00; A61F2220/0008; A61F2220/0016; A61F2220/0025; A61F2220/005; A61F2220/0066; A61F2220/0075; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054; A61F2250/00; A61F2250/0014; A61F2250/0039
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
138 words
A stent-graft, comprising: a tubular graft having a peripheral wall defining a periphery and a lumen therein, the lumen extending axially between first and second ends of the tubular graft; an exo-skeleton attached to an intermediate portion of the peripheral wall, the exo-skeleton comprising a plurality of independent serpentine elements, each serpentine element extending both peripherally and axially along at least a portion of the peripheral wall, the serpentine elements being distributed axially along the peripheral wall in phase with one another for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element being biased to an enlarged condition for maintaining the lumen substantially open, and constrainable in a contracted condition for facilitating introduction into a body passage; and a stent on the first end for substantially anchoring the first end within a body passage.
Claim 2
Dependent Claim
138 words
A stent-graft, comprising: a tubular graft having a peripheral wall defining a periphery and a lumen therein, the lumen extending axially between first and second ends of the tubular graft; an exo-skeleton attached to an intermediate portion of the peripheral wall, the exo-skeleton comprising a plurality of independent serpentine elements, each serpentine element extending both peripherally and axially along at least a portion of the peripheral wall, the serpentine elements being distributed axially along the peripheral wall in phase with one another for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element being biased to an enlarged condition for maintaining the lumen substantially open, and constrainable in a contracted condition for facilitating introduction into a body passage; and a stent on the first end for substantially anchoring the first end within a body passage.
Claim 3
Dependent Claim
25 words
The stent-graft of claim 1 , wherein each serpentine element comprises a zigzag structure extending substantially peripherally about the peripheral wall of the tubular graft.
Claim 4
Dependent Claim
22 words
The stent-graft of claim 1 , wherein each serpentine element defines a generally sinusoidal shape extending substantially axially along the peripheral wall.
Claim 5
Dependent Claim
23 words
The stent-graft of claim 3 , further comprising a plurality of serpentine elements distributed substantially evenly about the periphery of the peripheral wall.
Claim 6
Dependent Claim
31 words
The stent-graft of claim 3 , wherein each serpentine element includes substantially transverse peripheral elements, adjacent transverse peripheral elements being connected by alternating curved elements, thereby defining the generally sinusoidal shape.
Claim 7
Dependent Claim
14 words
The stent-graft of claim 1 , wherein the tubular graft comprises a polymeric material.
Claim 8
Dependent Claim
23 words
The stent-graft of claim 1 , wherein the polymeric material is selected from the group consisting of polyester, polytetrafluorethaline, dacron, teflon, and polyurethane.
Claim 9
Dependent Claim
22 words
The stent-graft of claim 1 , wherein the exo-skeleton is attached to the tubular graft by sutures, staples, wires, or an adhesive.
Claim 10
Dependent Claim
27 words
The stent-graft of claim 1 , wherein the exo-skeleton is attached to the tubular graft by a process selected from thermal bonding, chemical bonding, and ultrasonic bonding.
Claim 11
Dependent Claim
18 words
The stent-graft of claim 1 , wherein each serpentine element comprises a wire formed into a serpentine shape.
Claim 12
Dependent Claim
17 words
The stent-graft of claim 1 , wherein the stent on the first end comprises a coiled-sheet stent.
Claim 13
Dependent Claim
22 words
The stent-graft of claim 1 , wherein the stent includes external outwardly oriented hooks for engaging a wall of a body passage.
Claim 14
Dependent Claim
31 words
The stent-graft of claim 1 , further comprising pro-thrombotic material on an exterior surface of at least the stent, or one of the first and second ends of the tubular graft.
Claim 15
Dependent Claim
32 words
The stent-graft of claim 1 , wherein the first end of the tubular graft has a cross-section that is substantially smaller than a cross-section of the second end of the tubular graft.
Claim 16
Dependent Claim
19 words
The stent-graft of claim 1 , wherein the exo-skeleton is attached to an exterior surface of the tubular graft.
Claim 17
Dependent Claim
112 words
A stent-graft, comprising: a tubular graft having a peripheral wall defining a periphery and a lumen therein, the lumen extending axially between first and second ends of the tubular graft; and a plurality of independent serpentine elements attached to and distributed axially along the peripheral wall in a predetermined configuration in phase with one another for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element defining a zigzag shape extending substantially peripherally about the peripheral wall of the tubular graft, each serpentine element being biased to an enlarged condition for maintaining the lumen substantially open, and constrainable in a contracted condition for facilitating introduction into a body passage.
Claim 18
Dependent Claim
112 words
A stent-graft, comprising: a tubular graft having a peripheral wall defining a periphery and a lumen therein, the lumen extending axially between first and second ends of the tubular graft; and a plurality of independent serpentine elements attached to and distributed axially along the peripheral wall in a predetermined configuration in phase with one another for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element defining a zigzag shape extending substantially peripherally about the peripheral wall of the tubular graft, each serpentine element being biased to an enlarged condition for maintaining the lumen substantially open, and constrainable in a contracted condition for facilitating introduction into a body passage.
Claim 19
Dependent Claim
20 words
The stent-graft of claim 16 , further comprising a stent on at least one of the first and second ends.
Claim 20
Dependent Claim
33 words
The stent-graft of claim 17 , wherein the stent comprises a plurality of resilient mesh elements, the mesh elements being adapted to partially recoil when the stent is subjected to radially compressive forces.
Claim 21
Dependent Claim
16 words
The stent-graft of claim 18 , wherein the entire stent is made of resilient mesh elements.
Claim 22
Dependent Claim
22 words
The stent-graft of claim 17 , wherein the stent comprises a coiled-sheet stent located substantially within the lumen of the tubular graft.
Claim 23
Dependent Claim
35 words
The stent-graft of claim 20 , wherein the coiled-sheet stent comprises a stretchable portion defined by a plurality of resilient mesh elements adapted to partially recoil when the stent is subjected to radially compressive forces.
Claim 24
Dependent Claim
20 words
The stent-graft of claim 21 , wherein the stretchable portion extends longitudinally between first and second ends of the stent.
Claim 25
Dependent Claim
29 words
The stent-graft of claim 21 , wherein the stretchable portion comprises a sleeve on an end of the coiled-sheet stent exposed beyond the respective end of the tubular graft.
Claim 26
Dependent Claim
19 words
The stent-graft of claim 16 , wherein the plurality of serpentine elements are individually attached to the peripheral wall.
Claim 27
Dependent Claim
78 words
The stent-graft of claim 16 , wherein the second end of the tubular graft is bifurcated, and wherein the stent-graft further comprises: a tubular graft extension segment extending from the second end, the tubular graft extension segment having a peripheral wall; and a plurality of serpentine elements attached to and distributed along the peripheral wall of the tubular graft extension segment in a predetermined configuration for providing articulation of the tubular graft extension segment between adjacent serpentine elements.
Claim 28
Dependent Claim
73 words
The stent-graft of claim 25 , further comprising: a tubular graft docking limb having a peripheral wall, the docking limb being attachable to the second end of the tubular graft adjacent the tubular graft extension segment; and a plurality of serpentine elements attached to and distributed along the peripheral wall of the tubular graft docking limb in a predetermined configuration for providing articulation of the tubular graft docking limb between adjacent serpentine elements.
Claim 29
Dependent Claim
154 words
A stent-graft for placement within a bifurcation, comprising: a first tubular graft segment having a first end and a second bifurcated end, the first tubular graft segment having a first peripheral wall; a second tubular graft segment extending from the second bifurcated end, the second tubular graft segment having a second peripheral wall; and an exo-skeleton attached to at least one of the first and second peripheral walls, the exo-skeleton comprising a plurality of independent serpentine elements, each serpentine element extending both peripherally and axially along at least a portion of the respective peripheral wall to which it is attached, the serpentine elements being distributed axially along the peripheral wall in phase with one another for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element being biased to an enlarged condition for maintaining the lumen substantially open, and constrainable in a contracted condition for facilitating introduction into a body passage.
Claim 30
Dependent Claim
154 words
A stent-graft for placement within a bifurcation, comprising: a first tubular graft segment having a first end and a second bifurcated end, the first tubular graft segment having a first peripheral wall; a second tubular graft segment extending from the second bifurcated end, the second tubular graft segment having a second peripheral wall; and an exo-skeleton attached to at least one of the first and second peripheral walls, the exo-skeleton comprising a plurality of independent serpentine elements, each serpentine element extending both peripherally and axially along at least a portion of the respective peripheral wall to which it is attached, the serpentine elements being distributed axially along the peripheral wall in phase with one another for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element being biased to an enlarged condition for maintaining the lumen substantially open, and constrainable in a contracted condition for facilitating introduction into a body passage.
Claim 31
Dependent Claim
24 words
The stent-graft of claim 27 , further comprising a stent on the first end for substantially anchoring the first end within a body passage.
Claim 32
Dependent Claim
26 words
The stent-graft of claim 27 , further comprising a stent on the second tubular graft segment opposite the second end of the first tubular graft segment.
Claim 33
Dependent Claim
35 words
The stent-graft of claim 27 , further comprising a third tubular graft segment attachable to the second bifurcated end adjacent the second tubular graft segment, the third tubular graft segment having a third peripheral wall.
Claim 34
Dependent Claim
21 words
The stent-graft of claim 30 , wherein the exo-skeleton comprises one or more serpentine elements attached to the third peripheral wall.
Claim 35
Dependent Claim
20 words
The stent-graft of claim 27 , wherein the plurality of serpentine elements are individually attached to the respective peripheral wall.
Claim 36
Dependent Claim
115 words
A stent-graft, comprising: a tubular graft having a peripheral wall defining a periphery and a lumen therein, the lumen extending axially between first and second ends of the tubular graft; a plurality of independent serpentine elements attached to and distributed axially along the peripheral wall in a predetermined configuration for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element defining a zigzag shape extending substantially peripherally about the peripheral wall of the tubular graft, adjacent serpentine elements being in phase with one another; and a stent secured to each of the first and second ends of the tubular graft for substantially anchoring the first and second ends within a body passage.
Claim 37
Dependent Claim
115 words
A stent-graft, comprising: a tubular graft having a peripheral wall defining a periphery and a lumen therein, the lumen extending axially between first and second ends of the tubular graft; a plurality of independent serpentine elements attached to and distributed axially along the peripheral wall in a predetermined configuration for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element defining a zigzag shape extending substantially peripherally about the peripheral wall of the tubular graft, adjacent serpentine elements being in phase with one another; and a stent secured to each of the first and second ends of the tubular graft for substantially anchoring the first and second ends within a body passage.
Claim 38
Dependent Claim
13 words
The stent-graft of claim 33 , wherein the stent comprises a coiled-sheet stent.
Claim 39
Dependent Claim
16 words
The stent-graft of claim 33 , wherein each serpentine element comprises a single strand of wire.
Claim 40
Dependent Claim
22 words
The stent-graft of claim 35 , wherein each of the single strands of wire is attached to the tubular graft by sutures.
Claim 41
Dependent Claim
138 words
A stent-graft, comprising: a tubular graft having a peripheral wall defining a periphery and a lumen therein, the lumen extending axially between first and second ends of the tubular graft; a plurality of independent serpentine elements attached to and distributed axially along an intermediate region of the tubular graft in a predetermined configuration for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element defining a zigzag shape extending substantially peripherally about the peripheral wall of the tubular graft, each serpentine element being biased to an enlarged condition for maintaining the lumen substantially open, and constrainable in a contracted condition for facilitating introduction into a body passage; and a stent secured to each of the first and second ends of the tubular graft for substantially anchoring the first and second ends within a body passage.
Claim 42
Dependent Claim
138 words
A stent-graft, comprising: a tubular graft having a peripheral wall defining a periphery and a lumen therein, the lumen extending axially between first and second ends of the tubular graft; a plurality of independent serpentine elements attached to and distributed axially along an intermediate region of the tubular graft in a predetermined configuration for providing articulation of the tubular graft between adjacent serpentine elements, each serpentine element defining a zigzag shape extending substantially peripherally about the peripheral wall of the tubular graft, each serpentine element being biased to an enlarged condition for maintaining the lumen substantially open, and constrainable in a contracted condition for facilitating introduction into a body passage; and a stent secured to each of the first and second ends of the tubular graft for substantially anchoring the first and second ends within a body passage.
Claim 43
Dependent Claim
13 words
The stent-graft of claim 37 , wherein the stent comprises a coiled-sheet stent.
Claim 44
Dependent Claim
23 words
The stent-graft of claim 37 , wherein each serpentine element comprises a single strand of wire attached to the tubular graft by sutures.
Claim 45
Dependent Claim
22 words
The stent-graft of claim 39 , wherein each of the single strands of wire is attached to the tubular graft by sutures.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-12-03 | 2005-06-04 | 2005-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-03 | 2009-06-04 | 2009-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-03 | 2013-06-04 | 2013-12-04 | $7700.00 | Window Closed / Lapsed |