US5776160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winged biliary stent
Assignee: PASRICH PANKAJ
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Filing: 1995-05-18
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Granted: 1998-07-07
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Expires: 2015-05-18
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 Jay Pasricha
- 👤 Anthony N. Kalloo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:32
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: 14
Claim 1
Independent Claim
185 words
A method of providing for flow through a biological duct having a portion that is at least partially obstructed or constricted, comprising the steps of: providing a structure comprising: an elongated main body member having first and second longitudinal ends and a longitudinal axis extending therebetween; and 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 side faces; and inserting said structure into the biological duct so that it extends along at least a substantial portion of the constricted or partially obstructed portion thereof; whereby biological fluid is enabled to flow along said side faces of said wing members and further whereby axial displacement of said structure within said duct is resisted.
Claim 2
Independent Claim
185 words
A method of providing for flow through a biological duct having a portion that is at least partially obstructed or constricted, comprising the steps of: providing a structure comprising: an elongated main body member having first and second longitudinal ends and a longitudinal axis extending therebetween; and 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 side faces; and inserting said structure into the biological duct so that it extends along at least a substantial portion of the constricted or partially obstructed portion thereof; whereby biological fluid is enabled to flow along said side faces of said wing members and further whereby axial displacement of said structure within said duct is resisted.
Claim 3
Dependent Claim
24 words
A method as in claim 1, wherein said step of providing a structure comprises providing a structure having a plurality of non-perforated wing elements.
Claim 4
Dependent Claim
46 words
A method as in claim 1, wherein said step of providing a structure comprises providing a structure having a plurality of wing elements, at least one of which has a plurality of longitudinally extending grooves defined along at least a portion of a side face thereof.
Claim 5
Dependent Claim
25 words
A method as in claim 1, wherein said step of providing a structure comprises providing a structure having a plurality of radially extending wing elements.
Claim 6
Dependent Claim
19 words
A method as in claim 1, further comprising the step of coating said wing elements with a hydrophilic substance.
Claim 7
Dependent Claim
19 words
A method as in claim 1, further comprising the step of coating said wing elements with a therapeutic substance.
Claim 8
Dependent Claim
104 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 side faces.
Claim 9
Dependent Claim
104 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 side faces.
Claim 10
Dependent Claim
16 words
The stent of claim 7, wherein said longitudinal side faces are coated with a hydrophilic substance.
Claim 11
Dependent Claim
16 words
The stent of claim 7, wherein said longitudinal side faces are coated with a therapeutic substance.
Claim 12
Dependent Claim
11 words
The stent of claim 7, wherein said wing elements are non-perforated.
Claim 13
Dependent Claim
31 words
The stent of claim 7, wherein at least one of said wing elements has a plurality of longitudinally extending grooves defined along at least a portion of a side face thereof.
Claim 14
Dependent Claim
12 words
The stent of claim 7, wherein said wing elements extend radially outwardly.
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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) | 2001-07-06 | 2002-01-05 | 2002-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-06 | 2006-01-05 | 2006-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-06 | 2010-01-05 | 2010-07-07 | $7700.00 | Window Closed / Lapsed |