Patent US6375629B1 successfully refreshed from Google Patents.
US6375629B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core wire with shapeable tip
Assignee: Mirage Ip LLC
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Filing: 2000-10-17
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Granted: 2002-04-23
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Expires: 2020-10-17
Abstract
Abstract The present invention provides an improved core wire for use in a medical catheter. In one aspect, the invention provides a core wire with a shapeable tip and method of manufacturing the same. A core wire previously made superelastic is subject to additional processing to remove its superelasticity thereby allowing the material to be shapeable to aid in advancing the core wire through a blood vessel or other body cavities. In another aspect of the present invention, a method is provided for securing the core wire to the distal end of an elongated catheter tubular body. The tubular body is mechanically crimped onto the core wire to secure the core wire in place. This crimping method has been found to increase the strength of the bond between the core wire and the catheter tube so that greater pull force is required to break the core wire off from the catheter.
Inventors
- 👤 Ketan P. Muni
- 👤 Sivette Lam
- 👤 Juan T. Domingo
- 👤 Gholam-Reza Zadno-Azizi
- 👤 Samuel Omaleki
- 👤 Isaac J. Kim
- 👤 Celso J. Bagaoisan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:00
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/006; A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09175; A61M25/10; A61M2025/1043; A61M2025/1093
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
108 words
A medical guidewire, comprising: an elongate tubular body having proximal and distal sections and proximal and distal ends; an expandable member on the distal section of the tubular body; a lumen in the tubular body, the lumen extending between the proximal end of the tubular body to the distal end of the tubular body; and a core wire having proximal and distal sections, the core wire securely mounted on the distal end of the tubular body and constructed of a nickel titanium alloy formed by imparting superelasticity to the elongate body followed by removing superelasticity from the distal section of the elongate body to produce a shapeable tip.
Claim 2
Dependent Claim
108 words
A medical guidewire, comprising: an elongate tubular body having proximal and distal sections and proximal and distal ends; an expandable member on the distal section of the tubular body; a lumen in the tubular body, the lumen extending between the proximal end of the tubular body to the distal end of the tubular body; and a core wire having proximal and distal sections, the core wire securely mounted on the distal end of the tubular body and constructed of a nickel titanium alloy formed by imparting superelasticity to the elongate body followed by removing superelasticity from the distal section of the elongate body to produce a shapeable tip.
Claim 3
Dependent Claim
32 words
The guidewire of claim 1 , further comprising a coil around the core wire which extends from a distal end of the core wire to the distal end of the tubular body.
Claim 4
Dependent Claim
17 words
The guidewire of claim 2 , wherein the coil is secured to the core wire with solder.
Claim 5
Dependent Claim
15 words
The guidewire of claim 2 , wherein the coil is made of a radiopaque material.
Claim 6
Dependent Claim
23 words
The core wire of claim 1 , wherein the shapeable tip is formed by heat treating the distal section of the elongate body.
Claim 7
Dependent Claim
39 words
A medical device comprising: a catheter; and a cold-worked shapeable tip on a distal section of said catheter, said tip exhibiting substantially linear elasticity, wherein the catheter has a section proximal to the distal section which exhibits transformational superelasticity.
Claim 8
Dependent Claim
39 words
A medical device comprising: a catheter; and a cold-worked shapeable tip on a distal section of said catheter, said tip exhibiting substantially linear elasticity, wherein the catheter has a section proximal to the distal section which exhibits transformational superelasticity.
Claim 9
Dependent Claim
17 words
The medical device of claim 6 , wherein the shapeable tip is made of a nickel-titanium alloy.
Claim 10
Dependent Claim
16 words
The medical device of claim 6 , wherein the shapeable tip is in a martensite phase.
Claim 11
Dependent Claim
22 words
The medical device of claim 6 , wherein the catheter has a section proximal to the distal section which is substantially flexible.
Claim 12
Dependent Claim
44 words
A core wire for use in a medical device comprising: an elongate body having proximal and distal sections, the proximal section having superelastic properties and the distal section having a cold-worked tip from which superelasticity has been removed so that the tip is shapeable.
Claim 13
Dependent Claim
44 words
A core wire for use in a medical device comprising: an elongate body having proximal and distal sections, the proximal section having superelastic properties and the distal section having a cold-worked tip from which superelasticity has been removed so that the tip is shapeable.
Claim 14
Dependent Claim
24 words
The core wire of claim 10 , wherein the proximal section is made superelastic by first cold working the body followed by heat treatment.
Claim 15
Dependent Claim
23 words
The core wire of claim 10 , wherein the proximal section is made superelastic by solution treatment of the body followed by aging.
Claim 16
Dependent Claim
15 words
The core wire of claim 10 , wherein the shapeable tip has a flattened configuration.
Claim 17
Dependent Claim
29 words
A tip for a medical device, comprising: a core wire having a substantially flexible proximal section and a shapeable cold-worked distal section; and a coil surrounding the core wire.
Claim 18
Dependent Claim
29 words
A tip for a medical device, comprising: a core wire having a substantially flexible proximal section and a shapeable cold-worked distal section; and a coil surrounding the core wire.
Claim 19
Dependent Claim
29 words
The tip of claim 14 , wherein the proximal section of the core wire exhibits transformational superelasticity and the distal section of the core wire exhibits substantially linearly elasticity.
Claim 20
Dependent Claim
25 words
The tip of claim 14 , wherein the core wire has a proximal end which is attached to a distal end of the medical device.
Claim 21
Dependent Claim
31 words
A core wire having proximal and distal sections comprising: means for flexibility in the proximal section; and means for shapeability in the distal section, said shapeability means including a cold-worked tip.
Claim 22
Dependent Claim
31 words
A core wire having proximal and distal sections comprising: means for flexibility in the proximal section; and means for shapeability in the distal section, said shapeability means including a cold-worked tip.
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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) | 2005-04-22 | 2005-10-22 | 2006-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-22 | 2009-10-22 | 2010-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-22 | 2013-10-22 | 2014-04-23 | $7700.00 | Window Closed / Lapsed |