US6019736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guidewire for catheter
Assignee: Individual
•
Filing: 1997-05-15
•
Granted: 2000-02-01
•
Expires: 2017-05-15
Abstract
Abstract A flexible intravascular guidewire comprises a plurality of filaments braided together and drawn through a die to a reduced cross-sectional area of circular shape. Preferably, one or more of the filaments is coated with a radiopaque material prior to drawing it through the dye. According to a preferred embodiment, each of the filaments is made from the same metallic material; alternatively, the filament material may differ, e.g., to provide flexibility and torsional stiffness characteristics which are unachievable in a metal monofilament, or in a multifilament wire of the same filament materials.
Inventors
- 👤 Francisco J. Avellanet
- 👤 Robert Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:51
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/04; B21C37/045; A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09058; A61M2025/09075; A61M2025/09083; A61M2025/09091; A61M2025/09175; A61M2025/09191; D; D07; D07B; D07B2201/00; D07B2201/20; D07B2201/2001; D07B2201/2014; D07B2201/2015; D07B2201/2019; D07B5/00; D07B5/007
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
87 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire; and a hydrophilic low friction material over the length of the wire.
Claim 2
Dependent Claim
87 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire; and a hydrophilic low friction material over the length of the wire.
Claim 3
Dependent Claim
18 words
The catheter guidewire as defined by claim 1 wherein all of said filaments comprise the same metal material.
Claim 4
Dependent Claim
22 words
The catheter guidewire as defined by claim 1 wherein said material is selected from the group consisting of stainless steel and nickel-titanium.
Claim 5
Dependent Claim
91 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, at least one metal filament comprising a material different from that of the other metal filaments, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 6
Dependent Claim
91 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, at least one metal filament comprising a material different from that of the other metal filaments, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 7
Dependent Claim
88 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, one of said filaments comprising a metal tube filled with a radiopaque material, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 8
Dependent Claim
88 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, one of said filaments comprising a metal tube filled with a radiopaque material, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 9
Dependent Claim
82 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire which entraps particles of a radiopaque material, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 10
Dependent Claim
82 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire which entraps particles of a radiopaque material, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 11
Dependent Claim
23 words
The catheter guidewire as defined by claim 6 wherein said particles are selected from the group consisting of gold, platinum and barium sulfate.
Claim 12
Dependent Claim
90 words
A guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, at least one metal filament comprising a material different from that of the other metal filaments, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 13
Dependent Claim
90 words
A guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, at least one metal filament comprising a material different from that of the other metal filaments, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 14
Dependent Claim
28 words
The guidewire as set forth in claim 1 wherein the plurality of filaments are together drawn through a die to produce a guidewire core having a reduced diameter.
Claim 15
Dependent Claim
91 words
A guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire having a proximal end and a distal end that is smaller in diameter than said proximal end, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 16
Dependent Claim
91 words
A guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire having a proximal end and a distal end that is smaller in diameter than said proximal end, each filament of said multifilament wire having a transverse cross-section which complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 17
Independent Claim
54 words
A method for making a catheter guidewire having a proximal end and a distal end, the method comprising the steps of: twisting a plurality of metal filaments together; drawing the twisted metal filaments through a die to produce a guidewire core having a reduced diameter; and using the guidewire core in forming a guidewire.
Claim 18
Independent Claim
54 words
A method for making a catheter guidewire having a proximal end and a distal end, the method comprising the steps of: twisting a plurality of metal filaments together; drawing the twisted metal filaments through a die to produce a guidewire core having a reduced diameter; and using the guidewire core in forming a guidewire.
Claim 19
Dependent Claim
47 words
The method of claim 11, further comprising the step of either (i) applying radiopaque particles to said filaments prior to drawing through said die, whereby said particles become entrapped within said mulifilament guidewire and enhance the radiopacity thereof, or (ii) plating said guidewire core with radiopaque particles.
Claim 20
Dependent Claim
27 words
The method of claim 11, further comprising the step of grinding the guidewire core to reduce at least a portion of the diameter of the guidewire core.
Claim 21
Dependent Claim
26 words
The method of claim 13, further comprising the step of grinding the distal end of the guidewire core to produce a tapered tip for the guidewire.
Claim 22
Dependent Claim
22 words
The method of claim 13, wherein the step of grinding the distal end is done by electrochemical machining of the distal end.
Claim 23
Dependent Claim
18 words
The method of claim 14, further comprising the step of plating the distal end with a radiopaque material.
Claim 24
Dependent Claim
28 words
An intravascular guidewire for guiding medical devices through arterial passageways, said guidewire comprising a multifilament, drawn round core portion terminating in a flexible distal end of reduced diameter.
Claim 25
Dependent Claim
28 words
An intravascular guidewire for guiding medical devices through arterial passageways, said guidewire comprising a multifilament, drawn round core portion terminating in a flexible distal end of reduced diameter.
Claim 26
Dependent Claim
19 words
The guidewire as defined by claim 17, further comprising a protective coil made from a helically wound multifilament wire.
Claim 27
Dependent Claim
31 words
The guidewire as defined by claim 17, further comprising a protective coil comprising two monofilaments of dissimilar materials which are butt coupled together and helically wound to form an integral coil.
Claim 28
Dependent Claim
24 words
A catheter guidewire according to claim 1, wherein: none of said plurality of metal filaments forms a central core filament of said multifilament wire.
Claim 29
Dependent Claim
87 words
A catheter guidewire, comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, said filaments each provided with a non-circular transverse cross-section such that each said filament complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section defining a diameter which is appropriate for a guidewire; and a low friction material over the length of the wire.
Claim 30
Dependent Claim
87 words
A catheter guidewire, comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, said filaments each provided with a non-circular transverse cross-section such that each said filament complements that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, said circular transverse cross-section defining a diameter which is appropriate for a guidewire; and a low friction material over the length of the wire.
Claim 31
Dependent Claim
98 words
A catheter guidewire, comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, none of said plurality of metal filaments forming a central core filament of said wire, and each filament of said multifilament wire having a transverse cross-section which complements that of the other filaments so that said wire has a substantially circular transverse cross-section which is uniform over a length of the wire, said circular transverse cross-section defining a diameter which is appropriate for a guidewire; and a low friction hydrophilic material over the length of the wire.
Claim 32
Dependent Claim
98 words
A catheter guidewire, comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, none of said plurality of metal filaments forming a central core filament of said wire, and each filament of said multifilament wire having a transverse cross-section which complements that of the other filaments so that said wire has a substantially circular transverse cross-section which is uniform over a length of the wire, said circular transverse cross-section defining a diameter which is appropriate for a guidewire; and a low friction hydrophilic material over the length of the wire.
Claim 33
Dependent Claim
22 words
A catheter guidewire according to claim 22, wherein: said low friction material forms a sheath extending over the length of the wire.
Claim 34
Dependent Claim
67 words
A catheter guidewire, comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire having a first diameter over a length of the wire, and then drawn through at least one die to form a cable provided with a second diameter smaller than said first diameter over a length of the cable, said second diameter being appropriate for a guidewire.
Claim 35
Dependent Claim
67 words
A catheter guidewire, comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire having a first diameter over a length of the wire, and then drawn through at least one die to form a cable provided with a second diameter smaller than said first diameter over a length of the cable, said second diameter being appropriate for a guidewire.
Claim 36
Dependent Claim
20 words
A catheter guidewire according to claim 24, further comprising: a low friction sheath extending over the length of the cable.
Claim 37
Dependent Claim
12 words
A catheter guidewire according to claim 25, wherein: said sheath is hydrophilic.
Claim 38
Dependent Claim
88 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, each filament of said multifilament wire having a transverse cross-section which complements and is substantially the same as that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, which is solid at a center of said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 39
Dependent Claim
88 words
A catheter guidewire comprising: a plurality of metal filaments which have been twisted about each other to form a multifilament wire, each filament of said multifilament wire having a transverse cross-section which complements and is substantially the same as that of the other filament(s) so that said multifilament wire has a substantially circular transverse cross-section which is substantially uniform over a length of the multifilament wire, which is solid at a center of said circular transverse cross-section, and which defines a diameter which is appropriate for a guidewire.
Claim 40
Dependent Claim
24 words
A catheter guidewire according to claim 21, wherein: none of said plurality of metal filaments forms a central core filament of said multifilament wire.
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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) | 2003-01-31 | 2003-08-02 | 2004-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-31 | 2007-08-02 | 2008-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-31 | 2011-08-02 | 2012-02-01 | $7700.00 | Window Closed / Lapsed |