US6190332B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core wire with shapeable tip
Assignee: Mirage Ip LLC
•
Filing: 1998-02-19
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Granted: 2001-02-20
•
Expires: 2018-02-19
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
2026-10-22 22:25
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: 28
Claim 1
Independent Claim
63 words
A method of manufacturing a core wire, comprising: providing an elongate body having proximal and distal sections and proximal and distal ends; imparting superelasticity to the elongate body; and removing superelasticity from the distal section of the elongate body by cold working the distal section, following the imparting of superelasticity to the elongate body, to provide the distal section with a shapeable tip.
Claim 2
Independent Claim
63 words
A method of manufacturing a core wire, comprising: providing an elongate body having proximal and distal sections and proximal and distal ends; imparting superelasticity to the elongate body; and removing superelasticity from the distal section of the elongate body by cold working the distal section, following the imparting of superelasticity to the elongate body, to provide the distal section with a shapeable tip.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the core wire is made of a NiTi alloy.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein removing superelasticity from the distal section results in the distal section being in a martensite phase.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein superelasticity is imparted to the elongate body by cold working the body followed by heat treatment.
Claim 6
Dependent Claim
22 words
The method of claim 4 wherein cold working of the elongate body reduces the cross-section of the body about 20 to 40%.
Claim 7
Dependent Claim
33 words
The method of claim 4 wherein the heat treatment of the elongate body following cold working occurs at a temperature between about 300° and 600° C. for about 10 seconds to 60 minutes.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein superelasticity is imparted to the elongate body by solution treatment of the body followed by aging.
Claim 9
Dependent Claim
20 words
The method of claim 7 wherein the solution treatment of the body occurs at a temperature above about 500° C.
Claim 10
Dependent Claim
20 words
The method of claim 7 wherein the solution treatment of the body occurs at a temperature of about 750° C.
Claim 11
Dependent Claim
17 words
The method of claim 7 wherein aging occurs at a temperature of about 300° to 500° C.
Claim 12
Dependent Claim
25 words
The method of claim 1 , wherein said cold working the distal section reduces the cross section of the distal section about 10 to 50%.
Claim 13
Dependent Claim
18 words
The method of claim 1 , wherein said cold working the distal section produces a flattened distal section.
Claim 14
Dependent Claim
24 words
The method of claim 12 wherein the flattened distal section extends about 5 to 10 mm from the distal end of the elongate body.
Claim 15
Dependent Claim
22 words
The method of claim 13 wherein the flattened distal section extends about 7.5 mm from the distal end of the elongate body.
Claim 16
Dependent Claim
19 words
The method of claim 13 wherein the flattened distal section has a thickness of about 0.001 to 0.004 inches.
Claim 17
Dependent Claim
17 words
The method of claim 13 wherein the flattened distal section has a thickness of about 0.002 inches.
Claim 18
Independent Claim
76 words
A method of manufacturing a medical device having an elongate body with proximal and distal ends, the method comprising: providing means for imparting flexibility to the proximal and distal ends of the elongate body; and providing means for imparting shapeability to the distal end of the elongate body, said means including cold working the distal end of the elongate body after providing means for imparting flexibility to the proximal and distal ends of the elongate body.
Claim 19
Independent Claim
76 words
A method of manufacturing a medical device having an elongate body with proximal and distal ends, the method comprising: providing means for imparting flexibility to the proximal and distal ends of the elongate body; and providing means for imparting shapeability to the distal end of the elongate body, said means including cold working the distal end of the elongate body after providing means for imparting flexibility to the proximal and distal ends of the elongate body.
Claim 20
Independent Claim
87 words
A method of manufacturing a medical device, comprising: providing an elongate body having proximal and distal sections and proximal and distal ends; imparting superelasticity to the elongate body; and removing superelasticity from the distal section of the elongate body, following said imparting of superelasticity to the elongate body, to provide the distal section with a shapeable tip, the tip including a flattened portion of substantially constant cross section which is in the martensitic phase, said removing superelasticity from the distal section including cold working the distal section.
Claim 21
Independent Claim
87 words
A method of manufacturing a medical device, comprising: providing an elongate body having proximal and distal sections and proximal and distal ends; imparting superelasticity to the elongate body; and removing superelasticity from the distal section of the elongate body, following said imparting of superelasticity to the elongate body, to provide the distal section with a shapeable tip, the tip including a flattened portion of substantially constant cross section which is in the martensitic phase, said removing superelasticity from the distal section including cold working the distal section.
Claim 22
Dependent Claim
18 words
The method of claim 18 , wherein the elongate body is a core wire of a NiTi alloy.
Claim 23
Dependent Claim
21 words
The method of claim 19 , further comprising joining the core wire to the distal end of a hollow catheter body.
Claim 24
Dependent Claim
23 words
The method of claim 18 , wherein superelasticity is imparted to the elongate body by cold working the body followed by heat treatment.
Claim 25
Dependent Claim
29 words
The method of claim 18 , wherein the flattened portion extends from the distal end of the elongate body to about 5 to 10 mm from the distal end.
Claim 26
Dependent Claim
27 words
The method of claim 18 , wherein the flattened portion extends from the distal end of the elongate body to about 7.5 mm from the distal end.
Claim 27
Dependent Claim
19 words
The method of claim 18 , wherein the flattened portion has a thickness of about 0.001 to 0.004 inches.
Claim 28
Dependent Claim
17 words
The method of claim 18 , wherein the flattened portion has a thickness of about 0.002 inches.
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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) | 2004-02-20 | 2004-08-21 | 2005-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-02-20 | 2008-08-21 | 2009-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-02-20 | 2012-08-21 | 2013-02-20 | $7700.00 | Window Closed / Lapsed |