US5486191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winged biliary stent
Assignee: Johns Hopkins University
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Filing: 1994-02-02
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Granted: 1996-01-23
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Expires: 2014-02-02
Abstract
Abstract A stent, for example for maintaining the patency of a duct such as a biliary duct, is provided that includes a plurality of radially extending wings. The wings project from a core which has a guide wire or wire stylet lumen. Each of the wings preferably includes a plurality of minute, longitudinally extending grooves for bile flow even in the event of tumor ingrowth. Advantageously the core itself is preformed into a helical configuration.
Inventors
- 👤 Pankaj J. Pasricha
- 👤 Anthony N. Kalloo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:03
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/94; A61F2/02; A61F2/04; A61F2002/041; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/005
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
100 words
A stent comprising: an elongated main body member having first and second longitudinal ends and a longitudinal axis extending therebetween; a plurality of wing elements extending outwardly from said main body member, said wing elements being substantially uniformly distributed about an outer circumference of said main body member, each said wing element having a length at least about as great as a length of said main body member and a width substantially greater than a cross-sectional dimension of said main body member, wherein each said wing element has a plurality of longitudinally extending grooves defined on each Side face thereof.
Claim 2
Dependent Claim
100 words
A stent comprising: an elongated main body member having first and second longitudinal ends and a longitudinal axis extending therebetween; a plurality of wing elements extending outwardly from said main body member, said wing elements being substantially uniformly distributed about an outer circumference of said main body member, each said wing element having a length at least about as great as a length of said main body member and a width substantially greater than a cross-sectional dimension of said main body member, wherein each said wing element has a plurality of longitudinally extending grooves defined on each Side face thereof.
Claim 3
Dependent Claim
19 words
A stent as in claim 1, wherein each said wing element extends radially outwardly from said main body member.
Claim 4
Dependent Claim
29 words
A stent as in claim 1, wherein; said main body member has a stylet lumen defined axially therethrough, coincident with said longitudinal axis, for placement of a guide wire.
Claim 5
Dependent Claim
14 words
A stent as in claim 1, wherein there are at least four wing elements.
Claim 6
Dependent Claim
12 words
A stent as in claim 4, wherein there are eight wing elements.
Claim 7
Dependent Claim
23 words
A stent as in claim 1, wherein said wing elements are preformed to extend in a helical configuration along said main body member.
Claim 8
Dependent Claim
15 words
A stent as in claim 1, wherein said main body member is formed from polyethylene.
Claim 9
Dependent Claim
16 words
A stent as in claim 1, wherein said wing elements are coated with a hydrophilic substance.
Claim 10
Dependent Claim
16 words
A stent as in claim 1, wherein said wing elements are coated with a therapeutic substance.
Claim 11
Dependent Claim
18 words
A stent as in claim 1, wherein said wing elements are integrally formed with said main body member.
Claim 12
Dependent Claim
112 words
A stent comprising an elongated main body member having first and second longitudinal ends and a longitudinal axis extending therebetween; a plurality of wing elements extending outwardly from said main body member said wing elements being substantially uniformly distributed about an outer circumference of said main body member, each said wing element having a length at least about as great a length of said main body member and a width substantially greater than a cross-sectional dimension of said main body member, wherein each said wing element has first and second longitudinal side faces, at least one of said longitudinal side faces having a plurality of grooves defined therein and extending longitudinally thereof.
Claim 13
Dependent Claim
112 words
A stent comprising an elongated main body member having first and second longitudinal ends and a longitudinal axis extending therebetween; a plurality of wing elements extending outwardly from said main body member said wing elements being substantially uniformly distributed about an outer circumference of said main body member, each said wing element having a length at least about as great a length of said main body member and a width substantially greater than a cross-sectional dimension of said main body member, wherein each said wing element has first and second longitudinal side faces, at least one of said longitudinal side faces having a plurality of grooves defined therein and extending longitudinally thereof.
Claim 14
Dependent Claim
19 words
A stent as in claim 11 wherein each said wing element extends radially outwardly from said main body member.
Claim 15
Dependent Claim
29 words
A stent as in claim 11, wherein said main body member has a stylet lumen defined axially therethrough, coincident with said longitudinal axis, for placement of a guide wire.
Claim 16
Dependent Claim
14 words
A stent as in claim 11, wherein there are at least four wing elements.
Claim 17
Dependent Claim
23 words
A stent as in claim 11, wherein said wing elements are preformed to extend in a helical configuration along said main body member.
Claim 18
Dependent Claim
16 words
A stent as in claim 11, wherein said wing elements are coated with a hydrophilic substance.
Claim 19
Dependent Claim
16 words
A stent as in claim 14, wherein said wing elements are coated with a therapeutic substance.
Claim 20
Dependent Claim
130 words
A stent comprising: an elongated main body member having first and second longitudinal ends and a longitudinal axis extending therebetween; a plurality of wing elements projecting outwardly from said main body member, said wing elements being substantially uniformly distributed about an outer circumference of said main body member, each said wing element extending in a helical configuration along said main body member so as to have a length greater than the length of said main body member, each said wing member having first and second longitudinal side faces along which fluid flows due to the action of surface tension provided by such surfaces, at least one of said longitudinal side faces of at least one of said wing elements having a plurality of grooves defined therein and extending longitudinally thereof.
Claim 21
Dependent Claim
130 words
A stent comprising: an elongated main body member having first and second longitudinal ends and a longitudinal axis extending therebetween; a plurality of wing elements projecting outwardly from said main body member, said wing elements being substantially uniformly distributed about an outer circumference of said main body member, each said wing element extending in a helical configuration along said main body member so as to have a length greater than the length of said main body member, each said wing member having first and second longitudinal side faces along which fluid flows due to the action of surface tension provided by such surfaces, at least one of said longitudinal side faces of at least one of said wing elements having a plurality of grooves defined therein and extending longitudinally thereof.
Claim 22
Dependent Claim
16 words
The stent of claim 18, wherein said longitudinal side surfaces are coated with a hydrophilic substance.
Claim 23
Dependent Claim
16 words
The stent of claim 18, wherein said longitudinal side surfaces are coated with a therapeutic substance.
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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) | 1999-01-22 | 1999-07-24 | 2000-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-22 | 2003-07-24 | 2004-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-22 | 2007-07-24 | 2008-01-23 | $7700.00 | Window Closed / Lapsed |