US5487729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic guidewire coupling for catheter exchange
Assignee: Cordis Corp
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Filing: 1994-03-25
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Granted: 1996-01-30
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Expires: 2014-03-25
Abstract
Abstract Apparatus and method are disclosed for facilitating balloon catheter exchange in the vascular system of a patient. The apparatus and method concern means for holding a guidewire longitudinally fixed with respect to a guiding catheter while a balloon catheter is moved over the guidewire. Specifically, the guidewire is held longitudinally fixed with respect to the guiding catheter by way of magnetic coupling. A first magnetic element constitutes a portion of the guide wire or is attached to the guide wire to move with it. A second magnetic element is located proximate the balloon catheter but is not fixed to the balloon catheter. When the guidewire is moved within the guiding catheter to a location at which the first magnetic element reaches its point of closest approach to the second magnetic element, magnetic force holds the guidewire against movement relative to the guiding catheter even while a balloon catheter is being moved over the guidewire.
Inventors
- 👤 Ernesto Avellanet
- 👤 Ernesto Hernandez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0169; A61M25/09; A61B; A61B17/00; A61B17/22; A61B2017/22038; A61B2017/22049; A61M2025/09125; A61M2025/09175; A61M25/0105; A61M25/0127
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; said first magnetic attraction means comprising ferromagnetic material; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
Claim 2
Dependent Claim
126 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; said first magnetic attraction means comprising ferromagnetic material; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
Claim 3
Dependent Claim
127 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; said first magnetic attraction means comprising permanent magnetic material; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
Claim 4
Dependent Claim
127 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; said first magnetic attraction means comprising permanent magnetic material; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
Claim 5
Dependent Claim
130 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; said first magnetic attraction means comprising a plurality of spaced ferromagnetic segments; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
Claim 6
Dependent Claim
130 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; said first magnetic attraction means comprising a plurality of spaced ferromagnetic segments; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
Claim 7
Dependent Claim
131 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; said first magnetic attraction means comprising a plurality of spaced permanent magnet segments; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
Claim 8
Dependent Claim
131 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; said first magnetic attraction means comprising a plurality of spaced permanent magnet segments; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
Claim 9
Dependent Claim
127 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, said second magnetic attraction means comprising a permanent magnet; whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
Claim 10
Dependent Claim
127 words
Apparatus for facilitating catheter exchange in the vascular system of a patient, which comprises: a flexible guidewire member for introduction into the vascular system of the patient, said flexible guidewire having first magnetic attraction means along a length of said guidewire member that is adapted to remain outside of the patient's body; a catheter adapted for advancement over said guidewire member; second magnetic attraction means for positioning outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force, said second magnetic attraction means comprising a permanent magnet; whereby said catheter may be withdrawn over said guidewire member while said guidewire member is retained in position in the vascular system of the patient, via magnetic force.
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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) | 1999-01-29 | 1999-07-31 | 2000-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-29 | 2003-07-31 | 2004-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-29 | 2007-07-31 | 2008-01-30 | $7700.00 | Window Closed / Lapsed |