Patent US4013063A successfully refreshed from Google Patents.
US5368049A
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US
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Superelastic formable guidewire with malleable cladding
Assignee: CR Bard Inc
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Filing: 1993-10-15
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Granted: 1994-11-29
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Expires: 2013-10-15
Abstract
Abstract A guidewire is provided having a malleable segment extending beyond a superelastic tip portion of the guidewire. Such a configuration provides a guidewire which is resistant to kinking and plastic deformation in the superelastic portion, but which has a distal segment which can be shaped by a physician immediately prior to use in a surgical procedure. The malleable segment can be attached to the distal end of the superelastic tip portion, or alternatively, can result from a malleable coating on a portion of the superelastic tip, wherein the coating is thick enough to allow the coated portion of the tip to be formed into a desired shape. The malleable segment can be radiopaque to ease fluoroscopic visualization of the guidewire. In addition, the entire guidewire located proximally to the malleable segment can be fabricated from a superelastic alloy to provide resistance to kinking and plastic deformation along virtually the entire length of the guidewire.
Inventors
- 👤 L. Venkata Raman
- 👤 Stephen M. Salmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:21
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09058; A61M2025/09083; A61M2025/09175; A61M2205/00; A61M2205/02; A61M2205/0266
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
127 words
A guidewire for a catheter comprising: a. a core wire having a distal end portion formed of a superelastic alloy; b. a flexible coil surrounding the distal end portion and extending distally beyond the distal end portion; and c. a forming ribbon contained within the coil to be formed into a desired shape, the forming ribbon extending between the distal end portion and a portion of the coil located beyond the distal end portion; wherein the distal end portion includes a continuous layer of malleable material on a surface thereof, the malleable material covering at least about 2.2 centimeters of the distal end portion said malleable material being of thickness sufficient to impart manual formability to the distal end portion in the region of the malleable material.
Claim 2
Dependent Claim
127 words
A guidewire for a catheter comprising: a. a core wire having a distal end portion formed of a superelastic alloy; b. a flexible coil surrounding the distal end portion and extending distally beyond the distal end portion; and c. a forming ribbon contained within the coil to be formed into a desired shape, the forming ribbon extending between the distal end portion and a portion of the coil located beyond the distal end portion; wherein the distal end portion includes a continuous layer of malleable material on a surface thereof, the malleable material covering at least about 2.2 centimeters of the distal end portion said malleable material being of thickness sufficient to impart manual formability to the distal end portion in the region of the malleable material.
Claim 3
Dependent Claim
21 words
A guidewire as in claim 1 wherein the cladding comprises a metal or metallic alloy which does not exhibit superelastic properties.
Claim 4
Dependent Claim
11 words
A guidewire as in claim 2 wherein the cladding comprises gold.
Claim 5
Dependent Claim
17 words
A guidewire as in claim 1 wherein the superelastic alloy comprises an alloy of nickel and titanium.
Claim 6
Dependent Claim
12 words
A guidewire as in claim 4 wherein the superelastic alloy comprises nitinol.
Claim 7
Dependent Claim
15 words
A guidewire as in claim 1 wherein the core wire comprises a superelastic metallic alloy.
Claim 8
Dependent Claim
17 words
A guidewire as in claim 6 wherein the superelastic alloy comprises an alloy of nickel and titanium.
Claim 9
Dependent Claim
12 words
A guidewire as in claim 7 wherein the superelastic alloy comprises nitinol.
Claim 10
Dependent Claim
29 words
A guidewire as in claim 6 wherein the distal end portion of the guidewire and the core wire are fabricated from a single segment of a superelastic metallic alloy.
Claim 11
Dependent Claim
24 words
A guidewire as in claim 1 wherein the distal end portion of the guidewire is gradually tapered toward the distal end of the guidewire.
Claim 12
Dependent Claim
27 words
A guidewire as in claim 1 wherein the coil is fabricated of a material selected from the group consisting of platinum-tungsten alloys, gold-platinum alloys and stainless steel.
Claim 13
Dependent Claim
15 words
A guidewire as in claim 1 wherein the coil is formed of a radiopaque material.
Claim 14
Dependent Claim
14 words
A guidewire as in claim 1 having a lubricious coating on the surface thereof.
Claim 15
Dependent Claim
83 words
A guidewire for a catheter comprising: a. a shaft of a superelastic alloy, the shaft defining a body portion, a distal tip portion and a proximal end; and b. a continuous layer of malleable material on the surface of the shaft and extending on the distal tip portion at least about 2.2 centimeters and terminating distal to the proximal end, said malleable material being of a thickness sufficient to impart manual formability to the distal tip in the region of the malleable material.
Claim 16
Dependent Claim
83 words
A guidewire for a catheter comprising: a. a shaft of a superelastic alloy, the shaft defining a body portion, a distal tip portion and a proximal end; and b. a continuous layer of malleable material on the surface of the shaft and extending on the distal tip portion at least about 2.2 centimeters and terminating distal to the proximal end, said malleable material being of a thickness sufficient to impart manual formability to the distal tip in the region of the malleable material.
Claim 17
Dependent Claim
17 words
A guidewire as in claim 14 wherein the superelastic alloy comprises an alloy of nickel and titanium.
Claim 18
Dependent Claim
12 words
A guidewire as in claim 15 wherein the superelastic alloy comprises nitinol.
Claim 19
Dependent Claim
12 words
A guidewire as in claim 14 wherein the malleable material comprises gold.
Claim 20
Dependent Claim
12 words
A guidewire as in claim 14 wherein the malleable material is radiopaque.
Claim 21
Dependent Claim
16 words
A guidewire as in claim 14 additionally comprising a lubricious coating applied to the surface thereof.
Claim 22
Dependent Claim
21 words
A guidewire as in claim 14 wherein the distal tip portion is gradually tapered toward the distal end of the guidewire.
Claim 23
Dependent Claim
18 words
A guidewire as in claim 20 wherein the distal tip includes a spherical element at its distal end.
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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) | 1997-11-28 | 1998-05-30 | 1998-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-28 | 2002-05-30 | 2002-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-28 | 2006-05-30 | 2006-11-29 | $7700.00 | Window Closed / Lapsed |