US5636642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deformable tip super elastic guidewire
Assignee: Target Therapeutics Inc
•
Filing: 1995-04-25
•
Granted: 1997-06-10
•
Expires: 2015-04-25
Abstract
Abstract This invention is a surgical device. It is a guidewire for use in a catheter and is used for accessing a targeted site within a system of lumen within a patient's body. The guidewire may be of a high elasticity metal alloy, preferably a Ni--Ti alloy, having specified physical parameters, and is especially useful for accessing peripheral or soft tissue targets. The "necked" guidewire tip also forms a specific parameter of the invention.
Inventors
- 👤 Thomas J. Palermo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:23
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M25/0043; A61M25/0045; A61M2025/0046; A61M2025/09058; A61M2025/09083; A61M2025/09091; A61M2025/09133; A61M2025/09175
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
39 words
A guidewire suitable for guiding a catheter within a body lumen, comprising an elongated, flexible metal wire core of a super-elastic alloy having a UP of 75 ksi±10 ksi and an LP of 25±7.5 ksi measured at 3% strain.
Claim 2
Dependent Claim
39 words
A guidewire suitable for guiding a catheter within a body lumen, comprising an elongated, flexible metal wire core of a super-elastic alloy having a UP of 75 ksi±10 ksi and an LP of 25±7.5 ksi measured at 3% strain.
Claim 3
Dependent Claim
16 words
The guidewire of claim 1 where the guidewire has a eccentricity ratio of 1±10 -4 .
Claim 4
Dependent Claim
16 words
The guidewire of claim 1 having a distal section, a middle section, and a proximal section.
Claim 5
Dependent Claim
12 words
The guidewire of claim 1 in which the super-elastic alloy is Ni--Ti.
Claim 6
Dependent Claim
29 words
The guidewire of claim 3 in which the at least a portion of the distal portion is covered by an outer coil comprising platinum, tungsten, or an alloy thereof.
Claim 7
Dependent Claim
21 words
The guidewire of claim 3 in which the distal section comprises a proximal tapered portion and a constant diameter distal portion.
Claim 8
Dependent Claim
15 words
The guidewire of claim 6 wherein an inner coil surrounds the constant diameter distal portion.
Claim 9
Dependent Claim
27 words
The guidewire of claim 7 wherein the inner coil comprises a radiopaque metal selected from the group consisting of platinum, tungsten, or an alloy of the two.
Claim 10
Dependent Claim
20 words
The guidewire of claim 1 in which at least a portion of the guidewire is coated with a polymeric material.
Claim 11
Dependent Claim
96 words
The guidewire of claim 9 where the polymeric material comprises polymers produced from monomers selected from ethylene oxide; 2-vinyl pyridine; N-vinylpyrrolidone; polyethylene glycol acrylates such as mono-alkoxy polyethylene glycol mono(meth) acrylates, including mono-methoxy triethylene glycol mono (meth) acrylate, mono-methoxy tetraethylene glycol mono (meth) acrylate, polyethylene glycol mono (meth) acrylate; other hydrophilic acrylates such as 2-hydroxyethylmethacrylate, glycerylmethacrylate; acrylic acid and its salts; acrylamide and acrylonitrile; acrylamidomethylpropane sulfonic acid and its salts, cellulose, cellulose derivatives such as methyl cellulose ethyl cellulose, carboxymethyl cellulose, cyanoethyl cellulose, cellulose acetate, polysaccharides such as amylose, pectin, amylopectin, alginic acid, and cross-linked heparin.
Claim 12
Dependent Claim
10 words
The guidewire of claim 1 additionally comprising a catheter sheath.
Claim 13
Dependent Claim
45 words
A guidewire suitable for guiding a catheter within a body lumen, comprising an elongated, flexible metal wire core of a super-elastic alloy having an LP of 25±7.5 ksi measured at 3% strain and a transition temperature in the range of -11° C. and 13.5° C.
Claim 14
Dependent Claim
45 words
A guidewire suitable for guiding a catheter within a body lumen, comprising an elongated, flexible metal wire core of a super-elastic alloy having an LP of 25±7.5 ksi measured at 3% strain and a transition temperature in the range of -11° C. and 13.5° C.
Claim 15
Dependent Claim
16 words
The guidewire of claim 12 having a distal section, a middle section, and a proximal section.
Claim 16
Dependent Claim
12 words
The guidewire of claim 12 in which the super-elastic alloy is Ni--Ti.
Claim 17
Dependent Claim
15 words
The guidewire of claim 12 in which the distal section is tapered to a point.
Claim 18
Dependent Claim
28 words
The guidewire of claim 15 in which at least a portion of the distal portion is covered by an outer coil comprising platinum, tungsten, or an alloy thereof.
Claim 19
Dependent Claim
27 words
The guidewire of claim 16 in which the outer coil is connected at its distal end by a ribbon joined to the distal portion of the guidewire.
Claim 20
Dependent Claim
20 words
The guidewire of claim 12 in which at least a portion of the guidewire is coated with a polymeric material.
Claim 21
Dependent Claim
10 words
The guidewire of claim 12 additionally comprising a catheter sheath.
Claim 22
Dependent Claim
42 words
A guidewire suitable for guiding a catheter within a body lumen, comprising an elongated, flexible metal wire core of a super-elastic alloy having a UP of 75 ksi±10 ksi and a transition temperature in the range of -11° C. and 13.5° C.
Claim 23
Dependent Claim
42 words
A guidewire suitable for guiding a catheter within a body lumen, comprising an elongated, flexible metal wire core of a super-elastic alloy having a UP of 75 ksi±10 ksi and a transition temperature in the range of -11° C. and 13.5° C.
Claim 24
Dependent Claim
16 words
The guidewire of claim 20 having a distal section, a middle section, and a proximal section.
Claim 25
Dependent Claim
12 words
The guidewire of claim 20 in which the super-elastic alloy is Ni--Ti.
Claim 26
Dependent Claim
15 words
The guidewire of claim 20 in which the distal section is tapered to a point.
Claim 27
Dependent Claim
28 words
The guidewire of claim 20 in which at least a portion of the distal portion is covered by an outer coil comprising platinum, tungsten, or an alloy thereof.
Claim 28
Dependent Claim
27 words
The guidewire of claim 24 in which the outer coil is connected at its distal end by a ribbon joined to the distal portion of the guidewire.
Claim 29
Dependent Claim
20 words
The guidewire of claim 20 in which at least a portion of the guidewire is coated with a polymeric material.
Claim 30
Dependent Claim
10 words
The guidewire of claim 20 additionally comprising a catheter sheath.
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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) | 2000-06-09 | 2000-12-09 | 2001-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-09 | 2004-12-09 | 2005-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-09 | 2008-12-09 | 2009-06-10 | $7700.00 | Window Closed / Lapsed |