US6231598B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radially expandable stent
Assignee: Cook Medical Technologies LLC
•
Filing: 1998-09-24
•
Granted: 2001-05-15
•
Expires: 2018-09-24
Abstract
Abstract A radially expandable stent (10) made from a cannula or sheet of biocompatible material that includes at least one longitudinal segment (14) comprised of a series of laterally interconnected closed cells (13). Each closed cell of a longitudinal segment is defined laterally by a pair of longitudinal struts (15, 16) that are interconnected at each end by a circumferentially adjustable member (19, 20). When the stent is expanded using a balloon (47), the opposing circumferentially adjustable members deform to allow circumferential expansion of the longitudinal segment, while the length of the segment, as defined by the longitudinal struts, is maintained. Self-expanding versions of the stent utilize a nickel-titanium alloy. Adjacent longitudinal segments are joined by flexible interconnection segments (21) that permit the stent to bend laterally. The flexible interconnection segment is comprised of curvilinear struts (22, 23) that form a series of serpentine bends (81) that distribute lateral bending forces. In a preferred embodiment, a short strut interconnects longitudinal segments and an adjacent interconnection segment. Each interconnection strut attaches to the longitudinal segment within a region (27) at the end (17) of a longitudinal strut (15) dividing two adjacent closed cells.
Inventors
- 👤 Dale T. Berry
- 👤 Coy M. Herald
- 👤 Brian L. Bates
- 👤 Scott E. Boatman
- 👤 Michael C. Hoffa
- 👤 Neal E. Fearnot
- 👤 William D. Voorhees, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/915; A61L; A61L31/00; A61L31/02; A61L31/022; A61L31/14; A61L31/18; A61F2/88; A61F2002/91508; A61F2002/91516; A61F2002/91525; A61F2002/91533; A61F2002/9155; A61F2002/91558; A61F2002/91566; A61F2002/91575; A61F2002/91583; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054; A61F2250/00; A61F2250/0014; A61F2250/0036; A61F2250/0058; A61F2250/0096; A61F2250/0098
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
120 words
A radially expandable stent ( 10 ) comprising: an elongated member ( 11 ) having a passage ( 12 ) extending longitudinally therein and a first longitudinal segment ( 14 ) including a plurality of cells ( 13 ), selected of said cells ( 13 ) each including a first and a second longitudinal strut ( 15 , 16 ), said first longitudinal segment ( 14 ) having a first expanded radial stiffness greater than 4.87×10 −3 lbs (force) per millimeter (length); and said elongated member ( 11 ) also having an interconnection segment ( 21 ) connected to said first longitudinal segment ( 14 ) and having a second expanded radial stiffness less than said first expanded radial stiffness.
Claim 2
Dependent Claim
120 words
A radially expandable stent ( 10 ) comprising: an elongated member ( 11 ) having a passage ( 12 ) extending longitudinally therein and a first longitudinal segment ( 14 ) including a plurality of cells ( 13 ), selected of said cells ( 13 ) each including a first and a second longitudinal strut ( 15 , 16 ), said first longitudinal segment ( 14 ) having a first expanded radial stiffness greater than 4.87×10 −3 lbs (force) per millimeter (length); and said elongated member ( 11 ) also having an interconnection segment ( 21 ) connected to said first longitudinal segment ( 14 ) and having a second expanded radial stiffness less than said first expanded radial stiffness.
Claim 3
Dependent Claim
38 words
The stent of claim 1 , wherein said first longitudinal segment ( 14 ) and said interconnection segment ( 21 ) have a combined lateral bending stiffness less than 5.3×10 −5 in-lb (force) per degree per millimeter (length).
Claim 4
Dependent Claim
30 words
The stent of claim 1 , wherein said interconnection segment ( 21 ) includes a plurality of interconnected curvilinear struts ( 22 , 23 ) forming an approximately serpentine pattern.
Claim 5
Dependent Claim
29 words
The stent of claim 1 , further comprising a connecting strut ( 36 ) interconnecting said first longitudinal segment ( 14 ) and said interconnection segment ( 21 ).
Claim 6
Dependent Claim
28 words
The stent of claim 1 further comprising a plurality of said longitudinal segments ( 11 ) adjacent ones being interconnected by a said interconnection segment ( 21 ).
Claim 7
Dependent Claim
29 words
The stent of claim 1 , wherein said interconnection segment ( 21 ) includes a plurality of interconnected linear struts ( 22 , 23 ) forming a zig-zag pattern.
Claim 8
Dependent Claim
21 words
The stent of claim 1 , wherein said stent is self-expanding and wherein said elongated member comprises a nickel-titanium alloy material.
Claim 9
Dependent Claim
36 words
The stent of claim 1 , wherein selected of said cells are closed cells ( 13 ) having opposed longitudinal struts ( 15 or 16 ) and opposed circumferentially adjustable members ( 19 , 20 ).
Claim 10
Dependent Claim
21 words
The stent of claim 1 , wherein at least one end of said stent includes a radiopaque marker ( 48 ).
Claim 11
Dependent Claim
123 words
A radially expandable stent ( 10 ) comprising: an elongated member ( 11 ) having a passage ( 12 ) extending longitudinally therein and a first longitudinal segment ( 14 ), said first longitudinal segment ( 14 ) including a plurality of cells ( 13 ) and having a first expanded radial stiffness; and said elongated member ( 11 ) also having an interconnection segment ( 21 ) connected to said first longitudinal segment ( 14 ) and having a second expanded radial stiffness less than said first expanded radial stiffness, wherein said first longitudinal segment ( 14 ) and said interconnection segment ( 21 ) have a combined lateral bending stiffness less than 3.33×10 −6 in-lb (force) per degree per millimeter (length).
Claim 12
Dependent Claim
123 words
A radially expandable stent ( 10 ) comprising: an elongated member ( 11 ) having a passage ( 12 ) extending longitudinally therein and a first longitudinal segment ( 14 ), said first longitudinal segment ( 14 ) including a plurality of cells ( 13 ) and having a first expanded radial stiffness; and said elongated member ( 11 ) also having an interconnection segment ( 21 ) connected to said first longitudinal segment ( 14 ) and having a second expanded radial stiffness less than said first expanded radial stiffness, wherein said first longitudinal segment ( 14 ) and said interconnection segment ( 21 ) have a combined lateral bending stiffness less than 3.33×10 −6 in-lb (force) per degree per millimeter (length).
Claim 13
Dependent Claim
25 words
The stent of claim 10 , wherein selected of said cells each includes a first and a second longitudinal strut ( 15 , 16 ).
Claim 14
Dependent Claim
21 words
The stent of claim 10 , wherein first expanded radial stiffness is greater than 4.87×10 −3 lbs (force) per millimeter (length).
Claim 15
Dependent Claim
246 words
A radially expandable stent ( 10 ) comprising: an elongated member ( 11 ) having a passage ( 12 ) extending longitudinally therein, said elongated member ( 11 ) having a first longitudinal segment ( 14 ) including a plurality of laterally interconnected cells ( 13 ), selected of said cells ( 13 ) each including a first and a second longitudinal strut ( 15 , 16 ), said longitudinal struts of said selected cells ( 13 ) being interconnected by at least one pair of circumferentially adjustable members ( 19 , 20 ), said circumferentially adjustable members ( 19 , 20 ) permitting the circumferential expansion of the longitudinal segment ( 14 ) with minimal change in axial length of said longitudinal struts ( 15 , 16 ) when said longitudinal segment ( 14 ) is radially expanded; said longitudinal struts remaining substantially parallel with the longitudinal axis of said stent, and said stent further comprising a second longitudinal segment ( 25 ) like said first longitudinal segment and an interconnection segment ( 21 ) comprised of a plurality of interconnected curvilinear or linear struts ( 22 , 23 ) forming an approximately serpentine or zig-zag pattern, said interconnection segment being radially expandable, and said interconnection segment joined to at least one said first longitudinal strut ( 15 ) of the first longitudinal segment ( 14 ) and to at least one longitudinal strut ( 32 ) of said second longitudinal segment ( 25 ).
Claim 16
Dependent Claim
246 words
A radially expandable stent ( 10 ) comprising: an elongated member ( 11 ) having a passage ( 12 ) extending longitudinally therein, said elongated member ( 11 ) having a first longitudinal segment ( 14 ) including a plurality of laterally interconnected cells ( 13 ), selected of said cells ( 13 ) each including a first and a second longitudinal strut ( 15 , 16 ), said longitudinal struts of said selected cells ( 13 ) being interconnected by at least one pair of circumferentially adjustable members ( 19 , 20 ), said circumferentially adjustable members ( 19 , 20 ) permitting the circumferential expansion of the longitudinal segment ( 14 ) with minimal change in axial length of said longitudinal struts ( 15 , 16 ) when said longitudinal segment ( 14 ) is radially expanded; said longitudinal struts remaining substantially parallel with the longitudinal axis of said stent, and said stent further comprising a second longitudinal segment ( 25 ) like said first longitudinal segment and an interconnection segment ( 21 ) comprised of a plurality of interconnected curvilinear or linear struts ( 22 , 23 ) forming an approximately serpentine or zig-zag pattern, said interconnection segment being radially expandable, and said interconnection segment joined to at least one said first longitudinal strut ( 15 ) of the first longitudinal segment ( 14 ) and to at least one longitudinal strut ( 32 ) of said second longitudinal segment ( 25 ).
Claim 17
Dependent Claim
46 words
The stent of claim 13 , wherein adjacent cells of said selected cells ( 13 ) share a common said first longitudinal strut ( 15 ) and common said second longitudinal strut ( 16 ) with respective laterally adjacent second cells ( 29 , 29 ′).
Claim 18
Dependent Claim
23 words
The stent of claim 13 , wherein said stent further includes at least one radiopaque marker ( 48 ) at an end thereof.
Claim 19
Dependent Claim
17 words
The stent of claim 13 , wherein said stent is self-expanding and comprises a nickel-titanium alloy material.
Claim 20
Dependent Claim
16 words
The stent of claim 13 , wherein said stent has a recoil of less than 3.3%.
Claim 21
Dependent Claim
48 words
The stent of claim 1 , wherein said interconnection segment ( 21 ) includes a plurality of struts each interconnected to adjacent other ones of said plurality of said struts of said interconnection segment to define a pattern of struts extending circumferentially around said passage ( 12 ).
Claim 22
Dependent Claim
16 words
The stent of claim 1 , wherein the elongated member is defined from a single cannula.
Claim 23
Dependent Claim
48 words
The stent of claim 10 , wherein said interconnection segment ( 21 ) includes a plurality of struts each interconnected to adjacent other ones of said plurality of said struts of said interconnection segment to define a pattern of struts extending circumferentially around said passage ( 12 ).
Claim 24
Dependent Claim
16 words
The stent of claim 10 , wherein the elongated member is defined from a single cannula.
Claim 25
Dependent Claim
204 words
A radially expandable stent ( 10 ) comprising: an elongated member ( 11 ) having a passage ( 12 ) extending longitudinally therein, said elongated member ( 11 ) having a first longitudinal segment ( 14 ) including a plurality of laterally interconnected cells ( 13 ), selected of said cells ( 13 ) each including a first and a second longitudinal strut ( 15 , 16 ), said longitudinal struts of said selected cells ( 13 ) being interconnected by at least one pair of circumferentially adjustable members ( 19 , 20 ), said circumferentially adjustable members ( 19 , 20 ) permitting the circumferential expansion of the longitudinal segment ( 14 ) with minimal change in axial length of said longitudinal struts ( 15 , 16 ) when said longitudinal segment ( 14 ) is radially expanded; said longitudinal struts remaining substantially parallel with the longitudinal axis of said stent, and said first longitudinal segment ( 14 ) having a first expanded radial stiffness, and said elongated member ( 11 ) also having an interconnection segment ( 21 ) connected to said first longitudinal segment ( 14 ) and having a second expanded radial stiffness less than said first expanded radial stiffness.
Claim 26
Dependent Claim
204 words
A radially expandable stent ( 10 ) comprising: an elongated member ( 11 ) having a passage ( 12 ) extending longitudinally therein, said elongated member ( 11 ) having a first longitudinal segment ( 14 ) including a plurality of laterally interconnected cells ( 13 ), selected of said cells ( 13 ) each including a first and a second longitudinal strut ( 15 , 16 ), said longitudinal struts of said selected cells ( 13 ) being interconnected by at least one pair of circumferentially adjustable members ( 19 , 20 ), said circumferentially adjustable members ( 19 , 20 ) permitting the circumferential expansion of the longitudinal segment ( 14 ) with minimal change in axial length of said longitudinal struts ( 15 , 16 ) when said longitudinal segment ( 14 ) is radially expanded; said longitudinal struts remaining substantially parallel with the longitudinal axis of said stent, and said first longitudinal segment ( 14 ) having a first expanded radial stiffness, and said elongated member ( 11 ) also having an interconnection segment ( 21 ) connected to said first longitudinal segment ( 14 ) and having a second expanded radial stiffness less than said first expanded radial stiffness.
Claim 27
Dependent Claim
29 words
The stent of claim 8 , wherein said circumferentially adjustable members ( 19 , 20 ) protrude into said closed cells ( 13 ) when said stent is unexpanded.
Claim 28
Dependent Claim
40 words
The stent of claim 8 , wherein a said circumferentially adjustable member ( 19 or 20 ) protrudes into a said closed cell and a said circumferentially adjustable member ( 20 or 19 ) protrudes outwardly from said closed cell.
Claim 29
Dependent Claim
30 words
The stent of claim 8 , wherein said circumferentially adjustable members ( 19 , 20 ) protrude outwardly from said closed cells ( 13 ) when said stent is unexpanded.
Claim 30
Dependent Claim
60 words
The stent of claim 8 , wherein said interconnection segment ( 21 ) includes zig-zag struts ( 81 ) that are interconnected to each other, and interconnections thus formed are disposed between protrusions of said circumferentially adjustable members ( 19 , 20 ) of adjacent cells of adjacent longitudinal segments ( 14 , 25 ) when said stent is unexpanded.
Claim 31
Dependent Claim
30 words
The stent of claim 26 , wherein closed cells ( 13 ) of adjacent ones of said longitudinal segments are radially offset from each other by half a cell width.
Claim 32
Dependent Claim
25 words
The stent of claim 25 , wherein closed cells ( 13 ) of adjacent ones of said longitudinal segments are axially aligned with each other.
Claim 33
Dependent Claim
32 words
The stent of claim 1 , wherein said interconnection segment ( 21 ) is connected to said longitudinal segment ( 14 ) by at least one serpentine-shaped interconnection strut ( 80 ).
Claim 34
Dependent Claim
15 words
The stent of claim 9 , wherein said radiopaque marker ( 167 ) is “T”-shaped.
Claim 35
Dependent Claim
69 words
The stent of claim 1 , wherein said stent ( 10 ) spaced inwardly from ends thereof includes an opening ( 160 ), and said stent further includes a plurality of radiopaque markers ( 161 , 161 ′, 161 ″, 161 ′″) affixed to said stent about said opening to assist alignment of the opening with a side branch ( 166 ) of a main vessel ( 168 ).
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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) | 2004-05-14 | 2004-11-13 | 2005-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-14 | 2008-11-13 | 2009-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-14 | 2012-11-13 | 2013-05-15 | $7700.00 | Window Closed / Lapsed |