Patent US5624449A successfully refreshed from Google Patents.
US5624449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytically severable joint for endovascular embolic devices
Assignee: Stryker European Operations Holdings LLC
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Filing: 1995-04-28
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Granted: 1997-04-29
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Expires: 2015-04-28
Abstract
Abstract This invention is an apparatus for endovascular occlusion through the formation of thrombi in arteries, veins, aneurysms, vascular malformations, and arteriovenous fistulas. In particular, it deals with an improved sacrificial link between an endovascular device which is introduced to and is intended to remain at the desired thrombus formation site and the device used to introduce the device. The invention further includes a method for introduction of the device and its electrolytic separation.
Inventors
- 👤 Pete P. Pham
- 👤 Hong Doan
- 👤 Ivan Sepetka
- 👤 Joseph Eder
- 👤 Edward Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:13
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12099; A61B17/12109; A61B17/12113; A61B17/12131; A61B17/1214; A61B17/12145; A61B2017/00004; A61B2017/1205; A61B2017/12054; A61B2017/12063
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
192 words
A guidewire for use in the formation of a vascular occlusion, in combination with a catheter, comprising: a core wire, said core wire having an axis and not being susceptible to electrolytic disintegration in blood, a discrete, sacrificial, severable link having a diameter and which is susceptible to electrolytic disintegration in blood distal to and severably connected to said core wire, wherein said link has a length no greater than the diameter of the link or that the surface of the link after disintegration is not substantially greater than would be a circle having the diameter of the link, and wherein said core wire is insulated proximally of the link with at least one layer of an adherent polymeric covering and an elongate tip portion extending distally beyond said core wire and adapted to form said occlusion at a selected site within a mammal vasculature, said elongate tip portion not being susceptible to the electrolytic disintegration in blood, insulated just distally of the link with at least one layer of an adherent polymeric covering, and said elongate tip is severable from the core wire upon an electrolytic disintegration of the sacrificial link.
Claim 2
Dependent Claim
192 words
A guidewire for use in the formation of a vascular occlusion, in combination with a catheter, comprising: a core wire, said core wire having an axis and not being susceptible to electrolytic disintegration in blood, a discrete, sacrificial, severable link having a diameter and which is susceptible to electrolytic disintegration in blood distal to and severably connected to said core wire, wherein said link has a length no greater than the diameter of the link or that the surface of the link after disintegration is not substantially greater than would be a circle having the diameter of the link, and wherein said core wire is insulated proximally of the link with at least one layer of an adherent polymeric covering and an elongate tip portion extending distally beyond said core wire and adapted to form said occlusion at a selected site within a mammal vasculature, said elongate tip portion not being susceptible to the electrolytic disintegration in blood, insulated just distally of the link with at least one layer of an adherent polymeric covering, and said elongate tip is severable from the core wire upon an electrolytic disintegration of the sacrificial link.
Claim 3
Dependent Claim
28 words
The guidewire of claim 1 wherein said adherent polymeric coverings are of materials selected from the group consisting of polyfluorocarbons, polyxyxylene, polyethylene, polypropylene, polyurethane, polyimides, and silicone polymers.
Claim 4
Dependent Claim
17 words
The guidewire of claim 2 wherein at least one of the adherent polymeric coatings is a polyfluorocarbon.
Claim 5
Dependent Claim
17 words
The guidewire of claim 3 wherein at least one of the adherent polymeric coatings is a polytetrafluoroethylene.
Claim 6
Dependent Claim
16 words
The guidewire of claim 2 wherein at least one of the polymeric coatings is a polyxyxylene.
Claim 7
Dependent Claim
23 words
The guidewire of claim 2 wherein the discrete sacrificial link is a is a groove produced by laser scoring through a polymeric coating.
Claim 8
Dependent Claim
13 words
The guidewire of claim 1 wherein the elongate tip section is a coil.
Claim 9
Dependent Claim
15 words
The guidewire of claim 7 wherein the elongate tip section comprises a platinum alloy coil.
Claim 10
Dependent Claim
32 words
The guidewire of claim 1 wherein the core wire is electrically connected to a coil located coaxially about the axis of the core wire and which is electrically insulated from surrounding blood.
Claim 11
Dependent Claim
20 words
The guidewire of claim 9 wherein the discrete sacrificial link is a score in the insulation on the coaxial coil.
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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) | 2000-04-28 | 2000-10-28 | 2001-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-28 | 2004-10-28 | 2005-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-28 | 2008-10-28 | 2009-04-29 | $7700.00 | Window Closed / Lapsed |