US6503272B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stent-based venous valves
Assignee: Cordis US Corp
•
Filing: 2001-03-21
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Granted: 2003-01-07
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Expires: 2021-03-21
Abstract
Abstract An artificial venous valve which incorporates a stent having one or more of the elements comprising its frame deformed inwardly towards its center and a biocompatible fabric attached to the one or more elements is utilized to replace or supplement incompetent or damaged venous valves. The elements are deformed and the fabric attached in such a way as to form valve flaps, which when there is no pressure differential on opposite sides of the flaps, substantially occludes the lumen of the vessel into which the artificial valve has been deployed. When there is a pressure differential, albeit slight, due to the pumping of the heart, the flaps easily open and allow blood to flow therethrough while substantially preventing backflow.
Inventors
- 👤 Thomas W. Duerig
- 👤 Andreas Melzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:16
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2475; A61F2/2412; A61F2/2418; A61F2/82; A61F2/848; A61F2002/8486; A61F2220/00; A61F2220/0008; A61F2220/0016; A61F2220/0025; A61F2220/005; A61F2220/0066; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054; A61F2230/0063; A61F2230/0067; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
60 words
An artificial venous valve comprising: a stent formed from a lattice of interconnected elements and having a substantially cylindrical configuration with first and second open ends, wherein one or more of the elements are deformed inwardly out of the circumferential plane; and a biocompatible material attached to the one or more elements thereby forming one or more venous valve flaps.
Claim 2
Dependent Claim
60 words
An artificial venous valve comprising: a stent formed from a lattice of interconnected elements and having a substantially cylindrical configuration with first and second open ends, wherein one or more of the elements are deformed inwardly out of the circumferential plane; and a biocompatible material attached to the one or more elements thereby forming one or more venous valve flaps.
Claim 3
Dependent Claim
37 words
The artificial venous valve according to claim 1 , wherein the stent comprises: a plurality of hoops formed from a plurality of struts connected by a plurality of loops; and a plurality of bridges connecting adjacent hoops.
Claim 4
Dependent Claim
16 words
The artificial venous valve according to claim 1 , wherein the stent comprises a superelastic alloy.
Claim 5
Dependent Claim
27 words
The artificial venous valve according to claim 3 , wherein the alloy comprises from about 50.5 percent to about 60 percent nickel and the remainder comprising titanium.
Claim 6
Dependent Claim
30 words
The artificial venous valve according to claim 2 , wherein the one or more valve flaps each comprise two deformed elements arranged to form a substantially triangularly shaped support frame.
Claim 7
Dependent Claim
38 words
The artificial venous valve according to claim 5 , wherein the deformed elements are angled towards one of the first and second open ends at an angle in the range from about twenty degrees to about seventy degrees.
Claim 8
Dependent Claim
24 words
The artificial venous valve according to claim 6 , wherein the deformed elements are thinner where they are deformed out of the circumferential plane.
Claim 9
Dependent Claim
34 words
The artificial venous valve according to claim 1 , wherein the one or more valve flaps are dimensioned to substantially occlude the stent when there are no differential forces acting on the valve flaps.
Claim 10
Dependent Claim
13 words
The artificial venous valve according to claim 8 , comprising six valve flaps.
Claim 11
Dependent Claim
15 words
The artificial venous valve according to claim 1 , wherein the biocompatible material comprises Teflon®.
Claim 12
Dependent Claim
15 words
The artificial venous valve according to claim 1 , wherein the biocompatible material comprises Dacron®.
Claim 13
Dependent Claim
115 words
An artificial venous valve comprising: a self-expanding stent formed from a lattice of interconnected elements and having a substantially cylindrical configuration with first and second ends and a compressed diameter for insertion into a vessel and an expanded diameter for deployment into the vessel, wherein the one or more of the elements are deformed inwardly out of the circumferential plane at a first angle when the self-expanding stent is at its compressed diameter and at a second angle when the self-expanding stent is at its expanded diameter, the second angle being greater than the first angle; and a biocompatible fabric attached to the one or more elements thereby forming one or more venous valve flaps.
Claim 14
Dependent Claim
115 words
An artificial venous valve comprising: a self-expanding stent formed from a lattice of interconnected elements and having a substantially cylindrical configuration with first and second ends and a compressed diameter for insertion into a vessel and an expanded diameter for deployment into the vessel, wherein the one or more of the elements are deformed inwardly out of the circumferential plane at a first angle when the self-expanding stent is at its compressed diameter and at a second angle when the self-expanding stent is at its expanded diameter, the second angle being greater than the first angle; and a biocompatible fabric attached to the one or more elements thereby forming one or more venous valve flaps.
Claim 15
Dependent Claim
38 words
The artificial venous valve according to claim 12 , wherein the self-expanding stent comprises: a plurality of hoops formed from a plurality of struts connected by a plurality of loops; and a plurality of bridges connecting adjacent hoops.
Claim 16
Dependent Claim
17 words
The artificial venous valve according to claim 12 , wherein the self-expanding stent comprises a superelastic alloy.
Claim 17
Dependent Claim
27 words
The artificial venous valve according to claim 14 , wherein the alloy comprises from about 50.5 percent to about 60 percent nickel and the remainder comprising titanium.
Claim 18
Dependent Claim
30 words
The artificial venous valve according to claim 14 , wherein the one or more valve flaps each comprise two deformed elements arranged to form a substantially triangularly shaped support frame.
Claim 19
Dependent Claim
25 words
The artificial venous valve according to claim 14 , wherein the second angle is in the range from about twenty degrees to about seventy degrees.
Claim 20
Dependent Claim
24 words
The artificial venous valve according to claim 17 , wherein the deformed elements are thinner where they are deformed out of the circumferential plane.
Claim 21
Dependent Claim
34 words
The artificial venous valve according to claim 12 , wherein the one or more valve flaps are dimensioned to substantially occlude the stent when there are no differential forces acting on the valve flaps.
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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) | 2006-01-06 | 2006-07-08 | 2007-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-01-06 | 2010-07-08 | 2011-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-01-06 | 2014-07-08 | 2015-01-07 | $7700.00 | Window Closed / Lapsed |