Patent US3348546A successfully refreshed from Google Patents.
Patent US5269759A successfully refreshed from Google Patents.
US5269759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic guidewire coupling for vascular dilatation apparatus
Assignee: Cordis Corp
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Filing: 1992-07-28
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Granted: 1993-12-14
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Expires: 2012-07-28
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 Hernandez
- 👤 Ernesto Avellanet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
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: 33
Claim 1
Independent Claim
159 words
A Catheterization apparatus comprising: a flexible tubular guiding catheter sized for insertion into the vascular system of a patient, said guiding catheter defining distal and proximal ends; a guidewire adapted for longitudinal positioning within said guiding catheter while extending simultaneously from both ends of said guiding catheter, said guidewire being slidably moveable within said guiding catheter; a balloon catheter including a balloon coupled near its distal end, said balloon catheter defining a hollow longitudinal passage through which said guidewire can be threaded, said balloon catheter also defining a longitudinally extending conduit means for facilitating transmission of inflation fluid to said balloon; means for inhibiting longitudinal movements of said guide wire with respect to said guiding catheter as the balloon catheter is moved; said means for inhibiting comprises a first magnetic element fixed to said guidewire; a second magnetic element fixed with respect to said guiding catheter; said first and second magnetic elements together comprising permanently magnetic and ferromagnetic materials.
Claim 2
Dependent Claim
159 words
A Catheterization apparatus comprising: a flexible tubular guiding catheter sized for insertion into the vascular system of a patient, said guiding catheter defining distal and proximal ends; a guidewire adapted for longitudinal positioning within said guiding catheter while extending simultaneously from both ends of said guiding catheter, said guidewire being slidably moveable within said guiding catheter; a balloon catheter including a balloon coupled near its distal end, said balloon catheter defining a hollow longitudinal passage through which said guidewire can be threaded, said balloon catheter also defining a longitudinally extending conduit means for facilitating transmission of inflation fluid to said balloon; means for inhibiting longitudinal movements of said guide wire with respect to said guiding catheter as the balloon catheter is moved; said means for inhibiting comprises a first magnetic element fixed to said guidewire; a second magnetic element fixed with respect to said guiding catheter; said first and second magnetic elements together comprising permanently magnetic and ferromagnetic materials.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1, wherein one of said first and second magnetic elements comprises both ferromagnetic and permanently magnetic material.
Claim 4
Dependent Claim
27 words
The apparatus of claim 2, wherein said magnetic elements which comprises both ferromagnetic and permanently magnetic material comprises alternate portions of said permanently magnetic and ferromagnetic material.
Claim 5
Dependent Claim
52 words
The apparatus of claim 3, wherein: said guidewire comprises a core wire portion and a wire wound about said core wire portion; and said magnetic element which comprises alternate portions of permanently magnetic and ferromagnetic materials comprises portions of permanently magnetic outer coil windings separated by portions of ferromagnetic outer coil windings.
Claim 6
Dependent Claim
22 words
The apparatus of claim 1, wherein said first and second magnetic elements comprise magnetic bands and ferromagnetic spacers attached to said guidewire.
Claim 7
Dependent Claim
17 words
The apparatus of claim 1, wherein one of said first and second magnetic elements comprises an electromagnet.
Claim 8
Dependent Claim
16 words
The apparatus of claim 1, wherein; said first magnetic element comprises a portion of ferromagnetic material.
Claim 9
Dependent Claim
17 words
The apparatus of claim 1, wherein; said first magnetic element comprises a portion of permanently magnetized material.
Claim 10
Dependent Claim
40 words
The apparatus of claim 1, wherein; said first magnetic element comprises a portion of said guidewire which is made of alternative permanently magnetic and ferromagnetic laminations, the boundaries between said laminations extending generally perpendicular to the axis of the guidewire.
Claim 11
Dependent Claim
29 words
The apparatus of claim 1, wherein: said first magnetic element extends longitudinally along said guidewire over a distance substantially greater than the longitudinal expanse of said second magnetic element.
Claim 12
Dependent Claim
17 words
The apparatus of claim 1, wherein: said second magnetic element is located external to said guiding catheter.
Claim 13
Dependent Claim
171 words
A Catheterization apparatus comprising: a flexible tubular guiding catheter sized for insertion into the vascular system of a patient, said guiding catheter defining distal and proximal ends; a guidewire adapted for longitudinal positioning within said guiding catheter while extending simultaneously from both ends of said guiding catheter, said guidewire being slidably moveable within said guiding catheter; a balloon catheter including a balloon coupled near its distal end, said balloon catheter defining a hollow longitudinal passage through which said guidewire can be threaded, said balloon catheter also defining a longitudinally extending conduit means for facilitating transmission of inflation fluid to said balloon; means for inhibiting longitudinal movement of said guide wire with respect to said guiding catheter as the balloon catheter is moved; said guiding catheter and said guidewire being of sufficient length such that a portion of each of said guiding catheter and said guidewire extend outwardly from said patient; and said means for inhibiting longitudinal movement being located near the proximal end of said guidewire and said guiding catheter, respectively.
Claim 14
Dependent Claim
171 words
A Catheterization apparatus comprising: a flexible tubular guiding catheter sized for insertion into the vascular system of a patient, said guiding catheter defining distal and proximal ends; a guidewire adapted for longitudinal positioning within said guiding catheter while extending simultaneously from both ends of said guiding catheter, said guidewire being slidably moveable within said guiding catheter; a balloon catheter including a balloon coupled near its distal end, said balloon catheter defining a hollow longitudinal passage through which said guidewire can be threaded, said balloon catheter also defining a longitudinally extending conduit means for facilitating transmission of inflation fluid to said balloon; means for inhibiting longitudinal movement of said guide wire with respect to said guiding catheter as the balloon catheter is moved; said guiding catheter and said guidewire being of sufficient length such that a portion of each of said guiding catheter and said guidewire extend outwardly from said patient; and said means for inhibiting longitudinal movement being located near the proximal end of said guidewire and said guiding catheter, respectively.
Claim 15
Dependent Claim
16 words
The apparatus of claim 12, wherein: said guidewire includes a core wire comprising a ferromagnetic material.
Claim 16
Dependent Claim
121 words
Apparatus for facilitating balloon 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 balloon 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 balloon 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 17
Dependent Claim
121 words
Apparatus for facilitating balloon 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 balloon 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 balloon 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 18
Dependent Claim
34 words
Apparatus as defined by claim 14, including a guiding catheter adapted for introduction into the vascular system of the patient, said guiding catheter being adapted for receiving said flexible guidewire and said balloon catheter.
Claim 19
Dependent Claim
19 words
Apparatus as defined by claim 15, in which said second magnetic attraction means is fixed to said guiding catheter.
Claim 20
Dependent Claim
29 words
Apparatus as defined by claim 15, in which said guiding catheter has a proximal end and said second magnetic attraction means is positioned adjacent the guiding catheter proximal end.
Claim 21
Dependent Claim
22 words
Apparatus as defined in claim 14, in which portions of said guidewire other than said first magnetic attraction means are essentially nonmagnetic.
Claim 22
Dependent Claim
16 words
Apparatus as defined by claim 14, in which said second magnetic attraction means is an electromagnet.
Claim 23
Dependent Claim
30 words
Apparatus as defined by claim 14, in which said first magnetic attraction means comprises a section of said guidewire comprising magnetic metal, the remainder of said guidewire being essentially nonmagnetic.
Claim 24
Dependent Claim
22 words
Apparatus as defined by claim 14, in which said first magnetic attraction means extends for at least 15 cm. along said guidewire.
Claim 25
Independent Claim
105 words
A method for facilitating balloon catheter exchange in the vascular system of a patient, which comprises the steps of: introducing into the vascular system of a patient a flexible guidewire member having first magnetic attraction means along a length of said guidewire member that remains outside the patient's body; advancing a balloon catheter over said guidewire member; positioning second magnetic attraction means outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force; and withdrawing said balloon catheter over said guidewire member while said guidewire member is retained in position, via magnetic force.
Claim 26
Independent Claim
105 words
A method for facilitating balloon catheter exchange in the vascular system of a patient, which comprises the steps of: introducing into the vascular system of a patient a flexible guidewire member having first magnetic attraction means along a length of said guidewire member that remains outside the patient's body; advancing a balloon catheter over said guidewire member; positioning second magnetic attraction means outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force; and withdrawing said balloon catheter over said guidewire member while said guidewire member is retained in position, via magnetic force.
Claim 27
Dependent Claim
29 words
The method of claim 22 including the step of thereafter advancing another balloon catheter over said guidewire member while said guidewire member is retained in position by magnetic force.
Claim 28
Independent Claim
113 words
A method for facilitating balloon catheter exchange, which comprises the steps of: introducing into the vascular system of a patient a guiding catheter; providing a flexible guidewire member having first magnetic attraction means along a length of said guidewire member that remains outside the patient's body; introducing into said guiding catheter a portion of said guidewire member; advancing a balloon catheter along said guidewire member; positioning second magnetic attraction means outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force; and withdrawing said balloon catheter over said guidewire member while said guidewire member is retained in position, via magnetic force.
Claim 29
Independent Claim
113 words
A method for facilitating balloon catheter exchange, which comprises the steps of: introducing into the vascular system of a patient a guiding catheter; providing a flexible guidewire member having first magnetic attraction means along a length of said guidewire member that remains outside the patient's body; introducing into said guiding catheter a portion of said guidewire member; advancing a balloon catheter along said guidewire member; positioning second magnetic attraction means outside the patient's body in close proximity to said first magnetic attraction means to retain said guidewire member in position via magnetic force; and withdrawing said balloon catheter over said guidewire member while said guidewire member is retained in position, via magnetic force.
Claim 30
Dependent Claim
29 words
The method of claim 24 including the step of thereafter advancing another balloon catheter over said guidewire member while said guidewire member is retained in position by magnetic force.
Claim 31
Dependent Claim
62 words
A method as defined in claim 24, in which said guidewire member has a distal end, a mid-portion, and a proximal end; said first magnetic attraction means being located adjacent said proximal end; and said introducing step comprising the step of introducing into said guiding catheter said distal end and said mid-portion, with said proximal end remaining outside of said guiding catheter.
Claim 32
Dependent Claim
24 words
A method as defined by claim 24, said positioning step including the step of connecting said second magnetic attraction means to said guiding catheter.
Claim 33
Dependent Claim
40 words
A method as defined by claim 24, said positioning step comprising the step of connecting an electromagnet to said guiding catheter and the step of energizing said electromagnet to provide the magnetic force to retain said guidewire member in position.
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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) | 1996-12-13 | 1997-06-14 | 1997-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-13 | 2001-06-14 | 2001-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-13 | 2005-06-14 | 2005-12-14 | $7700.00 | Window Closed / Lapsed |