Patent US5836893A successfully refreshed from Google Patents.
US5836893A
Expired / Lapsed
US
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Intravascular guidewire
Assignee: Boston Scientific Scimed Inc
•
Filing: 1996-03-08
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Granted: 1998-11-17
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Expires: 2016-03-08
Abstract
Abstract An intravascular guidewire providing enhanced steerability and radioscopic visibility. The guidewire has an elongated selectively formable core and a plastic jacket including proximal and distal jacket portions, where the distal jacket portion is further divided into a proximal jacket section and a distal jacket section. The distal jacket portion incorporates means for enhancing the radiopaque properties of the distal jacket portion relative to the proximal jacket portion. The distal jacket section has a different radiopacity than the proximal jacket section, making the distal jacket section more easily viewable under radioscopy. One embodiment provides enhanced steerability with a distal jacket section made of softer material than the proximal jacket section. Another embodiment provides enhanced steerability with a distal jacket cross-section smaller than the proximal jacket cross-section.
Inventors
- 👤 Michael J. Urick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:21
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09058; A61M2025/09083; A61M2025/09091; A61M25/0105; A61M25/0108
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
168 words
A guidewire comprising: an elongated core having a length, a width, proximal end, distal end, and an axial surface extending the length of said elongated core; and a plastic jacket extending around said axial surface of said elongated core, said plastic jacket including a proximal jacket portion and a distal jacket portion, said portions formed of a plastic material, wherein said distal jacket portion incorporates means for enhancing the radiopaque properties of said distal jacket portion relative to said proximal jacket portion; said distal jacket portion having a distal jacket section and a proximal jacket section, said proximal jacket section having a different radiopacity than said distal jacket section wherein said distal jacket section radiopacity is greater than said proximal jacket section radiopacity, and said distal jacket section is at least 80% loaded by weight with radiopaque material; and said distal jacket section including a softer material than said proximal jacket section and including a plastic atraumatic distal tip disposed distally of said distal end of said core.
Claim 2
Dependent Claim
168 words
A guidewire comprising: an elongated core having a length, a width, proximal end, distal end, and an axial surface extending the length of said elongated core; and a plastic jacket extending around said axial surface of said elongated core, said plastic jacket including a proximal jacket portion and a distal jacket portion, said portions formed of a plastic material, wherein said distal jacket portion incorporates means for enhancing the radiopaque properties of said distal jacket portion relative to said proximal jacket portion; said distal jacket portion having a distal jacket section and a proximal jacket section, said proximal jacket section having a different radiopacity than said distal jacket section wherein said distal jacket section radiopacity is greater than said proximal jacket section radiopacity, and said distal jacket section is at least 80% loaded by weight with radiopaque material; and said distal jacket section including a softer material than said proximal jacket section and including a plastic atraumatic distal tip disposed distally of said distal end of said core.
Claim 3
Dependent Claim
17 words
The guidewire of claim 1, wherein said distal jacket section has a length of about 1 inch.
Claim 4
Dependent Claim
20 words
The guidewire of claim 1, wherein said distal jacket section has a smaller cross section than said proximal jacket section.
Claim 5
Dependent Claim
17 words
The guidewire of claim 3, wherein said distal jacket section has a length of about 1 inch.
Claim 6
Dependent Claim
38 words
The guidewire of claim 1, wherein said distal jacket section has a Durometer value in the range of about 80 A to about 85 A, and said proximal jacket section has a Durometer value of about 93 A.
Claim 7
Dependent Claim
11 words
The guidewire of claim 1, wherein said core comprises stainless steel.
Claim 8
Dependent Claim
14 words
The guidewire of claim 1, wherein said radiopaque material is a compound containing tungsten.
Claim 9
Dependent Claim
39 words
The guidewire of claim 1, wherein said means for enhancing the radiopaque properties of said distal jacket section relative to said proximal jacket section include the incorporation of a radiopaque material within said plastic of said distal jacket portion.
References Cited (Backward Citations)
FR2401668A1
Cited
US4345602A
Cited
US4282876A
Cited
US4899787A
Cited
US4534363A
Cited
US4456017A
Cited
JPS6012069A
Cited
US4925445A
Cited
WO1985001444A1
Cited
US4835003A
Cited
US4642267A
Cited
US4729914A
Cited
US4721117A
Cited
US4739768B2
Cited
US4739768B1
Cited
US4739768A
Cited
EP0340304A1
Cited
US4811743A
Cited
US4867174A
Cited
US5078702A
Cited
WO1989009626A1
Cited
US4884579A
Cited
US4961731A
Cited
US4977901A
Cited
JPH02180277A
Cited
EP0380102A1
Cited
US4922924A
Cited
US5069226A
Cited
EP0395098A1
Cited
US4955862A
Cited
US5045072A
Cited
US5061254A
Cited
US4991602A
Cited
WO1991000051A1
Cited
US5129890A
Cited
EP0405823A2
Cited
EP0407965A1
Cited
US5095915A
Cited
US5452726A
Cited
US5333620A
Cited
US5342383A
Cited
US5533985A
Cited
JPH08257136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-11-16 | 2002-05-18 | 2002-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-16 | 2006-05-18 | 2006-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-16 | 2010-05-18 | 2010-11-17 | $7700.00 | Window Closed / Lapsed |