US5824052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coiled sheet stent having helical articulation and methods of use
Assignee: Boston Scientific Scimed Inc
•
Filing: 1997-03-18
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Granted: 1998-10-20
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Expires: 2017-03-18
Abstract
Abstract An endoprosthesis is provided having at least first and second resilient coiled sheet portions, and an intermediate region comprising a helical articulation. The coiled sheet portions may be of the same or different diameters so as to accommodate a taper in the body lumen, while the helical articulation comprises a mesh portion that provides both flexibility and high radial strength, and which contracts to its delivery profile with relatively few turns. The coiled sheet portions also may be of the same or different lengths, and for very long devices, may be interspersed between a plurality of helical articulation portions. The pitch of the helical articulation may be varied to create a partial telescoping of the helical articulation within one of the first and second coiled sheet portions when in a contracted state. The prosthesis may also be used for treating bifurcated vessels.
Inventors
- 👤 Farhad Khosravi
- 👤 Michael Hogendijk
- 👤 John Spiridigliozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/92; A61F2/90; A61F2/91; A61F2/02; A61F2/04; A61F2/06; A61F2002/065; A61F2250/00; A61F2250/0004; A61F2250/0007; A61F2250/0014; A61F2250/0039
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
63 words
A stent for supporting a body lumen, the stent comprising: resilient first and second coiled sheet portions, each of the first and second coiled sheet portions being concentrically coiled; a helical articulation joining the first and second coiled sheet portions; wherein the stent has a first diameter suitable for transluminal delivery when in a contracted state and a second larger diameter when deployed.
Claim 2
Dependent Claim
63 words
A stent for supporting a body lumen, the stent comprising: resilient first and second coiled sheet portions, each of the first and second coiled sheet portions being concentrically coiled; a helical articulation joining the first and second coiled sheet portions; wherein the stent has a first diameter suitable for transluminal delivery when in a contracted state and a second larger diameter when deployed.
Claim 3
Dependent Claim
38 words
The stent as defined in claim 1 wherein the helical articulation comprises a plurality of turns, the helical articulation having a pitch sufficient to prevent formation of gaps between the plurality of turns when the stent is deployed.
Claim 4
Dependent Claim
32 words
The stent as defined in claim 2 wherein the helical articulation partially telescopes within one of the first and second coiled sheet portions when the stent is wound to the contracted state.
Claim 5
Dependent Claim
20 words
The stent as defined in claim 1 wherein the first coiled sheet portion has a tapered outer diameter when deployed.
Claim 6
Dependent Claim
26 words
The stent as defined in claim 1 wherein one of the first and second coiled sheet portions and the helical articulation have a multiplicity of openings.
Claim 7
Dependent Claim
18 words
The stent as defined in claim 1 wherein the first and second coiled sheet portions have equal lengths.
Claim 8
Dependent Claim
18 words
The stent as defined in claim 1 wherein the first and second coiled sheet portions have equal diameters.
Claim 9
Dependent Claim
18 words
The stent as defined in claim 1 wherein the first and second coiled sheet portions have equal thicknesses.
Claim 10
Dependent Claim
25 words
The stent as defined in claim 1 wherein the first coiled sheet portion and the helical articulation have equal lengths when the stent is deployed.
Claim 11
Dependent Claim
30 words
The stent as defined in claim 1 wherein at least one of the first and second coiled sheet portions includes locking elements to retain the stent at the second diameter.
Claim 12
Dependent Claim
14 words
The stent as defined in claim 1 wherein the stent comprises a nickel-titanium alloy.
Claim 13
Dependent Claim
122 words
The stent as defined in claim 1 for treating a bifurcation: wherein the first and second coiled sheet portions and the helical articulation form a first member, the first coiled sheet portion adapted for disposition in a common lumen of the bifurcation, the second coiled sheet portion adapted for disposition in a first branch of the bifurcation; the stent further comprising a second member comprising a third coiled sheet portion, a fourth coiled sheet portion, and a helical articulation disposed therebetween, the third coiled sheet portion adapted for disposition in the common lumen of the bifurcation nested within the first coiled sheet portion of the first member, the fourth coiled sheet portion adapted for disposition in a second branch of the bifurcation.
Claim 14
Dependent Claim
28 words
The prosthesis as defined in claim 12 wherein at least one of the first through fourth coiled sheet portions and the helical articulations have a multiplicity of openings.
Claim 15
Dependent Claim
22 words
The prosthesis as defined in claim 12 wherein at least two of the first through fourth coiled sheet portions have equal lengths.
Claim 16
Dependent Claim
22 words
The prosthesis as defined in claim 12 wherein at least two of the first through fourth coiled sheet portions have equal diameters.
Claim 17
Dependent Claim
26 words
The prosthesis as defined in claim 12 wherein the first and third coiled sheet portions have smaller thicknesses than the second and fourth coiled sheet portions.
Claim 18
Dependent Claim
22 words
The prosthesis as defined in claim 12 wherein at least one of the first through fourth coiled sheet portions includes locking elements.
Claim 19
Dependent Claim
16 words
The prosthesis as defined in claim 12 wherein the first and second members have unequal lengths.
Claim 20
Dependent Claim
17 words
The prosthesis as defined in claim 12 wherein the first and second members comprise a nickel-titanium alloy.
Claim 21
Dependent Claim
94 words
A stent for supporting a body lumen, the stent comprising: a resilient first coiled sheet portion having a first length, a first thickness, and a first range of expanded diameters, the first coiled sheet portion being concentrically coiled; a resilient second coiled sheet portion having a second length, a second thickness, and a second range of expanded diameters, the second coiled sheet portion being concentrically coiled; a helical articulation joining the first and second coiled sheet portions; wherein the stent has a contracted state suitable for transluminal delivery and an expanded state when deployed.
Claim 22
Dependent Claim
94 words
A stent for supporting a body lumen, the stent comprising: a resilient first coiled sheet portion having a first length, a first thickness, and a first range of expanded diameters, the first coiled sheet portion being concentrically coiled; a resilient second coiled sheet portion having a second length, a second thickness, and a second range of expanded diameters, the second coiled sheet portion being concentrically coiled; a helical articulation joining the first and second coiled sheet portions; wherein the stent has a contracted state suitable for transluminal delivery and an expanded state when deployed.
Claim 23
Dependent Claim
41 words
The stent as defined in claim 20 wherein the helical articulation comprises a plurality of turns, the helical articulation having a pitch sufficient to prevent formation of gaps between the plurality of turns when the stent is in the expanded state.
Claim 24
Dependent Claim
32 words
The stent as defined in claim 21 wherein the helical articulation partially telescopes within one of the first and second coiled sheet portions when the stent is wound to the contracted state.
Claim 25
Dependent Claim
20 words
The stent as defined in claim 20 wherein the first coiled sheet portion has a tapered outer diameter when deployed.
Claim 26
Dependent Claim
26 words
The stent as defined in claim 20 wherein one of the first and second coiled sheet portions and the helical articulation have a multiplicity of openings.
Claim 27
Dependent Claim
15 words
The stent as defined in claim 20 wherein the first and second lengths are unequal.
Claim 28
Dependent Claim
18 words
The stent as defined in claim 20 wherein the first and second ranges of expanded diameters are unequal.
Claim 29
Dependent Claim
15 words
The stent as defined in claim 20 wherein the first and second thicknesses are unequal.
Claim 30
Dependent Claim
25 words
The stent as defined in claim 20 wherein the first coiled sheet portion and the helical articulation have unequal lengths when the stent is deployed.
Claim 31
Dependent Claim
28 words
The stent as defined in claim 20 wherein the first coiled sheet portion includes locking elements to retain the first coiled sheet portion at a selected expanded diameter.
Claim 32
Dependent Claim
14 words
The stent as defined in claim 20 wherein the stent comprises a nickel-titanium alloy.
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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) | 2001-10-19 | 2002-04-20 | 2002-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-19 | 2006-04-20 | 2006-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-19 | 2010-04-20 | 2010-10-20 | $7700.00 | Window Closed / Lapsed |