US6206915B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drug storing and metering stent
Assignee: Medtronic Vascular Inc
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Filing: 1998-09-29
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Granted: 2001-03-27
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Expires: 2018-09-29
Abstract
Abstract A drug storing and metering stent for placement within a vessel comprising an outer member having a lumen, an inner member positioned within the lumen of the outer member. A space separates the inner member from the outer member and within which space a therapeutic drug is disposed. The stent includes at least one protrusion provided on at least one of the inner and outer members and extending across the space so as to cause a friction fit between the inner and outer members. The stent also includes a pattern of perforation across both the inner and outer members to permit the stent to expand radially. The invention also relates to a method of making such a stent, and a method of releasing a therapeutic drug within a vessel.
Inventors
- 👤 John R. Fagan
- 👤 Chirag B. Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:42
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/005; A61F2220/0058; A61F2250/00; A61F2250/0058; A61F2250/0067
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
67 words
A stent comprising: an outer member having a lumen; a cannulated inner member positioned within the lumen of the outer member; a space separating the inner member from the outer member; and at least one protrusion provided on at least one of the inner and outer members, the protrusion extending across the space, so as to cause a friction fit between the inner and the outer member.
Claim 2
Dependent Claim
67 words
A stent comprising: an outer member having a lumen; a cannulated inner member positioned within the lumen of the outer member; a space separating the inner member from the outer member; and at least one protrusion provided on at least one of the inner and outer members, the protrusion extending across the space, so as to cause a friction fit between the inner and the outer member.
Claim 3
Dependent Claim
25 words
A stent as set forth in claim 1 further including a therapeutic drug disposed within the space separating the inner member from the outer member.
Claim 4
Dependent Claim
17 words
A stent as set forth in claim 2 , wherein the drug is imbedded within a gel.
Claim 5
Dependent Claim
33 words
A stent as set forth in claim 1 further including a pattern of perforation extending from the outer member through the inner members, so as to permit the stent to expand in diameter.
Claim 6
Dependent Claim
18 words
A stent as set forth in claim 1 , wherein the inner and outer member are concentrically aligned.
Claim 7
Dependent Claim
77 words
A stent comprising: first and second tubular members concentrically aligned about a longitudinal axis, and defining a substantially cylindrical profile; a space defined by an outer surface of the second tubular member and an inner surface of the first tubular member, wherein said space contains a therapeutic drug; and means for maintaining the space between the second member and the first member, said means also providing a friction fit between the second member and the first member.
Claim 8
Dependent Claim
77 words
A stent comprising: first and second tubular members concentrically aligned about a longitudinal axis, and defining a substantially cylindrical profile; a space defined by an outer surface of the second tubular member and an inner surface of the first tubular member, wherein said space contains a therapeutic drug; and means for maintaining the space between the second member and the first member, said means also providing a friction fit between the second member and the first member.
Claim 9
Dependent Claim
32 words
A stent as set forth in claim 6 , wherein means for maintaining includes at least one protrusion extending across the space from at least one of the first and second member.
Claim 10
Dependent Claim
23 words
A stent as set forth in claim 6 further including a therapeutic drug disposed within the space between the first and second members.
Claim 11
Dependent Claim
33 words
A stent as set forth in claim 6 further including a pattern of perforation extending from the outer member through the inner members, so as to permit the stent to expand in diameter.
Claim 12
Independent Claim
80 words
A method of manufacturing a stent, the method comprising: providing a first tubular member having a first initial diameter; positioning within the first member, a second tubular member having a second initial diameter, so that a difference between the first and second diameters define a space between the first and second members; and causing at least one protrusion to extend across the space from one of the first and second members to maintain the second member within the first member.
Claim 13
Independent Claim
80 words
A method of manufacturing a stent, the method comprising: providing a first tubular member having a first initial diameter; positioning within the first member, a second tubular member having a second initial diameter, so that a difference between the first and second diameters define a space between the first and second members; and causing at least one protrusion to extend across the space from one of the first and second members to maintain the second member within the first member.
Claim 14
Dependent Claim
26 words
A method as set forth in claim 10 further including the step of disposing a therapeutic drug in the space between the first and second members.
Claim 15
Dependent Claim
42 words
A method as set forth in claim 10 further including the step of etching the pattern of perforation which extends from the outer member through the inner members, so as to permit the members to expand proportionately beyond their respective initial diameters.
Claim 16
Independent Claim
105 words
A method of manufacturing a stent, the method comprising: providing a first tubular member having a first initial diameter; providing a second tubular member having a second initial diameter, such that when the second member is positioned within the first member a difference between the first and second diameters define a space between the first and second members causing at least one protrusion to extend from one of the first and second members toward the other of the first and second members; and inserting the second member within the first member, such that the protrusion provides a friction fit between the first and second member.
Claim 17
Independent Claim
105 words
A method of manufacturing a stent, the method comprising: providing a first tubular member having a first initial diameter; providing a second tubular member having a second initial diameter, such that when the second member is positioned within the first member a difference between the first and second diameters define a space between the first and second members causing at least one protrusion to extend from one of the first and second members toward the other of the first and second members; and inserting the second member within the first member, such that the protrusion provides a friction fit between the first and second member.
Claim 18
Dependent Claim
26 words
A method as set forth in claim 13 further including the step of disposing a therapeutic drug within the space between the first and second members.
Claim 19
Dependent Claim
42 words
A method as set forth in claim 13 further including the step of etching a pattern of perforation which extends from the outer member through the inner members, so as to permit the members to expand proportionately beyond their respective initial diameters.
Claim 20
Independent Claim
103 words
A method of releasing a therapeutic drug within a vessel, the method comprising: providing an expandable stent having a second tubular member disposed within a first tubular member, a space separating the second tubular member from the first tubular member, a therapeutic drug disposed within the space, and means for maintaining the space between the second member and the first member, said means also providing a friction fit between the second member and the first member; positioning the stent within a vessel; expanding the stent radially; and permitting fluid within the vessel to contact the drug as the fluid flows through the stent.
Claim 21
Independent Claim
103 words
A method of releasing a therapeutic drug within a vessel, the method comprising: providing an expandable stent having a second tubular member disposed within a first tubular member, a space separating the second tubular member from the first tubular member, a therapeutic drug disposed within the space, and means for maintaining the space between the second member and the first member, said means also providing a friction fit between the second member and the first member; positioning the stent within a vessel; expanding the stent radially; and permitting fluid within the vessel to contact the drug as the fluid flows through the stent.
Claim 22
Dependent Claim
39 words
A method as set forth in claim 16 , further comprising: exposing the space within which the therapeutic drug is disposed to fluid flow in the vessel, so as to cause the drug to be released into the vessel.
Claim 23
Dependent Claim
35 words
A method as set forth in claim 16 , wherein the first and second tubular members are expandable and the step of positioning includes expanding the first and second tubular members against the vessel walls.
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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) | 2004-03-26 | 2004-09-25 | 2005-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-26 | 2008-09-25 | 2009-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-26 | 2012-09-25 | 2013-03-27 | $7700.00 | Window Closed / Lapsed |