Patent US4934380A successfully refreshed from Google Patents.
US4934380A
Expired / Lapsed
US
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Medical guidewire
Assignee: Boston Scientific Corp
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Filing: 1988-11-23
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Granted: 1990-06-19
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Expires: 2008-11-23
Abstract
Abstract A medical guidewire has an elongated body that has a degree of flexibility and a distal tip region of relatively greater flexibility. The guidewire consists of a core having a body of first diameter, a distal portion of a relatively smaller diameter, and a generally flat distal end. The end is disposed in the tip region and is spaced proximally from a round tip element that defines the distal end of the guidewire. The distal portion of the core is formed of nitinol. A first coil is joined at its proximal end to the core body by a coupling or crimp ring and extends along the core to a termination point in the distal tip region, proximal of the end portion of the core. A relatively more flexible second coil has a proximal end joined to the first coil and has a distal end joined to the round tip element. A safety wire is secured to the core and has a generally flat distal end within the second coil, joined to the round tip. A transition wire is secured to the core and has a generally flat distal end that terminates within the second coil intermediate of the distal ends of the core and safety wire. The safety wire and transition wires are secured to the coupling.
Inventors
- 👤 Fernando A. de Toledo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:05
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M25/09016; A61M25/09033; A61M2025/09058; A61M2025/09083; A61M2025/09133; A61M2025/09141; A61M2025/09175
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
227 words
A medical guidewire having an elongated body that has a first flexibility and a distal tip region of a second, relatively greater flexibility, said guidewire comprising a core having a body portion of a first diameter, a distal portion terminating in a relatively smaller diameter, and a distal end portion, said distal end portion disposed in a distal tip region and spaced proximally from a round tip element that defines a distal end of said guidewire, said distal portion being formed of nitinol, a first coil joined to the body portion of said core at its proximal end at coupling means and extending along said core to a termination point in said distal tip region, proximal of the end portion of the core, a relatively more flexible second coil has a proximal end joined to said first coil and has a distal end joined to the round tip element, a safety wire secured to said core, said safety wire having a generally flat distal end portion within said second coil, joined to said round tip element, a transition wire secured to said core, said transition wire having a generally flat distal end portion disposed to terminate within said second coil intermediate of the distal end portions of said core and of said safety wire, said safety wire and said transition wire being secured to said coupling means.
Claim 2
Dependent Claim
227 words
A medical guidewire having an elongated body that has a first flexibility and a distal tip region of a second, relatively greater flexibility, said guidewire comprising a core having a body portion of a first diameter, a distal portion terminating in a relatively smaller diameter, and a distal end portion, said distal end portion disposed in a distal tip region and spaced proximally from a round tip element that defines a distal end of said guidewire, said distal portion being formed of nitinol, a first coil joined to the body portion of said core at its proximal end at coupling means and extending along said core to a termination point in said distal tip region, proximal of the end portion of the core, a relatively more flexible second coil has a proximal end joined to said first coil and has a distal end joined to the round tip element, a safety wire secured to said core, said safety wire having a generally flat distal end portion within said second coil, joined to said round tip element, a transition wire secured to said core, said transition wire having a generally flat distal end portion disposed to terminate within said second coil intermediate of the distal end portions of said core and of said safety wire, said safety wire and said transition wire being secured to said coupling means.
Claim 3
Dependent Claim
68 words
The medical guidewire of claim 1 wherein the generally flat distal end portions of the core, safety wire and, transition wire are of predetermined axial extent, and the generally flat distal end portion of said transition wire is disposed to span a gap between a proximal end of the safety wire generally flat distal end portion and a distal end of a core generally flat distal end portion.
Claim 4
Dependent Claim
23 words
The medical guidewire of claim 1 wherein at least one of said safety wire and said transition wire is a flat ribbon wire.
Claim 5
Dependent Claim
29 words
The medical guidewire of claim 1 wherein at least one of said safety wire, said transition wire, said second coil and said round tip element are of radiopaque material.
Claim 6
Dependent Claim
12 words
The medical guidewire of claim 1 wherein said radiopaque material comprises platinum.
Claim 7
Dependent Claim
104 words
The medical guidewire of claim 1 wherein said first coil in a first region preceding said second coil has a first outer diameter and in a second region distal said first region said first coil has a second, relatively smaller outer diameter, and said second coil, in a proximal region adjacent said first coil, has an outer diameter substantially equal to the first outer diameter of said first coil and an inner diameter substantially equal to the second outer diameter of said first coil, and the proximal region of said second coil is disposed about the second, smaller diameter region of said first coil.
Claim 8
Dependent Claim
44 words
The medical guidewire of claim 6 wherein the diameter of said first coil in said first region is substantially uniform, and the diameter of said first coil in said second region is substantially uniform, and said first region lies immediately adjacent said second region.
Claim 9
Dependent Claim
34 words
The medical guidewire of claim 6 wherein the relatively smaller second diameter of the second region of said first coil is formed by removal of coil wire material from the exterior of said coil.
Claim 10
Dependent Claim
24 words
The medical guidewire of claim 6 wherein said first coil and said second coil are joined in the proximal region of said second coil.
Claim 11
Dependent Claim
41 words
The medical guidewire of claim 1 or 6 wherein adjacent windings of said first coil in the region proximal of joining to said second coil are relatively more spaced than adjacent windings of other, more proximal regions of said first coil.
Claim 12
Dependent Claim
33 words
The medical guidewire of claim 1 wherein said first coil terminates distal of a proximal end of said core and said guidewire further comprises a sleeve of polymeric material disposed about said core.
Claim 13
Dependent Claim
17 words
The medical guidewire of claim 11 wherein the material of said sleeve s polytetrafluorethylene (PTFE) or polyethylene.
Claim 14
Dependent Claim
49 words
The medical guidewire of claim 11 wherein the sleeve terminates distally adjacent to coupling means or a proximal end of said first coil and the outer diameter of said first coil near the sleeve termination point is equal to or greater than the outer diameter of the adjacent sleeve.
References Cited (Backward Citations)
US2118631A
Cited
US2560915A
Cited
US3528406A
Cited
US3789841A
Cited
US3757768A
Cited
US3868956A
Cited
US3890977A
Cited
US4019925A
Cited
US3906938A
Cited
US4003369A
Cited
US4020829A
Cited
US4534363A
Cited
US4545390A
Cited
EP0141006A1
Cited
US4665906A
Cited
US4538622A
Cited
US4619274A
Cited
US4748986A
Cited
US4724846A
Cited
US4721117A
Cited
US4676249A
Cited
EP0255234A1
Cited
US4715378A
Cited
WO1988000844A1
Cited
US4719924A
Cited
EP0274130A2
Cited
EP0274412A2
Cited
EP0279959A1
Cited
US4779628A
Cited
US4830023A
Cited
US4827941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |