US4917103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide wire extension
Assignee: CR Bard Inc
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Filing: 1987-02-27
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Granted: 1990-04-17
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Expires: 2007-02-27
Abstract
Abstract A guide wire system for use in catheter exchanges avoids the need for a separate exchange wire. Instead of the conventional practice in which the initial guide wire is removed and replaced with a longer exchange wire, a guide wire extension is attached to the proximal end of the initial guide wire thereby increasing its effective length so that it may be used to perform a catheter exchange. The initial guide wire remains in place in the patient's vasculature. The proximal end of the guide wire and the distal end of the exchange wire are formed to define a connection which may be crimped to effect the connection between the two wires. A crimping tool is provided to hold the mating ends of the guide wire and extension wire together while effecting the crimp.
Inventors
- 👤 Richard A. Gambale
- 👤 James F. Crittenden
- 👤 James P. Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:33
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0169; A61M25/09; A61M25/0905; B; B21; B21F; B21F15/00; B21F15/02; B21F15/06; A61M25/09041
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
220 words
A guide wire system for guiding an elongate, flexible catheter having a guide wire lumen through a lumen in the body of a patient and adapted to facilitate exchange of the catheter for another catheter comprising: a guide wire having a proximal and a distal end; an extension wire having a proximal end and a distal end; tubular connector means on at least one of said wires for connection of the proximal end of the guide wire with the distal end of the extension wire thereby to extend the effective length of the guide wire; said tubular connector means being constructed and arranged to be received within the catheter lumen and to have a low profile in which its cross-sectional dimensions are substantially the same as those of the wire to enable the catheter to be passed over the wires and the connector means when the wires are connected by the connector means; whereby a catheter placed in a patient and having the guide wire extending therethrough may be exchanged for another catheter by connecting the proximal end of the guide wire with the distal end of the extension wire, then removing the catheter over the connected wires and then advancing another catheter onto and along the wires without requiring removal or substantial change of position of the guide wire.
Claim 2
Dependent Claim
220 words
A guide wire system for guiding an elongate, flexible catheter having a guide wire lumen through a lumen in the body of a patient and adapted to facilitate exchange of the catheter for another catheter comprising: a guide wire having a proximal and a distal end; an extension wire having a proximal end and a distal end; tubular connector means on at least one of said wires for connection of the proximal end of the guide wire with the distal end of the extension wire thereby to extend the effective length of the guide wire; said tubular connector means being constructed and arranged to be received within the catheter lumen and to have a low profile in which its cross-sectional dimensions are substantially the same as those of the wire to enable the catheter to be passed over the wires and the connector means when the wires are connected by the connector means; whereby a catheter placed in a patient and having the guide wire extending therethrough may be exchanged for another catheter by connecting the proximal end of the guide wire with the distal end of the extension wire, then removing the catheter over the connected wires and then advancing another catheter onto and along the wires without requiring removal or substantial change of position of the guide wire.
Claim 3
Dependent Claim
48 words
A guide wire system as defined in claim 1 further comprising, in combination, a flexible catheter through which the guide wire and extension wire are slidably received, and wherein the combined length of the guide wire and the extension wire is approximately twice the length of the catheter.
Claim 4
Dependent Claim
37 words
A guide wire system as defined in claim 1 wherein the tubular connector means comprises means for effecting a mechanical interlock between the proximal end of the guide wire and the distal end of the extension wire.
Claim 5
Dependent Claim
37 words
A guide wire system as defined in claim 3 further comprising: said mechanical interlock being constructed and arranged so as to have a tensile strength sufficient to withstand axial separation force of the order of one pound.
Claim 6
Dependent Claim
37 words
A guide wire system as defined in claim 4 further comprising: said mechanical interlock being constructed and arranged so as to have a compressive strength sufficient to withstand an axial load of the order of one pound.
Claim 7
Dependent Claim
17 words
A guide wire system as defined in claim 3 wherein said mechanical interlock comprises a crimped interlock.
Claim 8
Dependent Claim
37 words
A guide wire system as defined in claim 3 further comprising: said mechanical interlock being constructed and arranged so as to have a compressive strength sufficient to withstand an axial load of the order of one pound.
Claim 9
Dependent Claim
84 words
A guide wire system as defined in claim 3 wherein the mechanical interlock further comprises: a tubular socket formed on one of the proximal ends of the guide wire or distal end of the extension wire, the other of said ends of the guide wire and extension wire being dimensioned to be received within the tubular socket thereby to mate said other end and tubular socket; said received other end and tubular socket being adapted to be formed transversely into a generally U-shaped configuration.
Claim 10
Dependent Claim
40 words
A guide wire system as defined in claim 8 wherein the tubular socket is formed on the proximal end of the guide wire and the distal end of the extension wire is dimensioned to be received within the tubular socket.
Claim 11
Dependent Claim
41 words
A guide wire system as defined in claim 9 further comprising; the distal end of the extension wire being tapered and terminated in a substantially uniform diameter elongate tip adapted to be received within the tubular socket of the guide wire.
Claim 12
Dependent Claim
17 words
A guide wire system as defined in claim 10 wherein the extension wire is a solid rod.
Claim 13
Dependent Claim
54 words
A guide wire system as defined in claim 9 further comprising: the tubular socket being in the form of a thin walled tube of the order of four inches long, having a wall thickness of between about 0.0015 and 0.003 inches, the socket in the tube being of the order of three inches deep.
Claim 14
Dependent Claim
34 words
A guide wire system as defined in claim 8 wherein the outside dimensions of the tubular socket are the same as those of the portion of the guide wire adjacent to the tubular socket.
Claim 15
Dependent Claim
73 words
A guide wire system as defined in claim 3 wherein the mechanical interlock further comprises: a tubular socket formed on the proximal end of the guide wire, the distal end of the extension wire defining a mated end and being dimensioned to be received within the tubular socket; the mated end and tubular socket being deformed transversely int a generally trapezoidally-shaped portion having a central segment and a pair of sloped end segments.
Claim 16
Dependent Claim
35 words
A guide wire system as defined in claim 14 wherein said guide wire and extension wire extend along an axis and wherein said sloped segments extend at an angle of about 30° to said axis.
Claim 17
Dependent Claim
54 words
A guide wire system as defined in claim 14 wherein the guide wire and extension wire extend along an axis and wherein the central segment is displaced from the axis by an amount sufficient to retain the guide wire and extension wire together when subjected to a force of at least about one pound.
Claim 18
Dependent Claim
22 words
A guide wire system as defined in claim 16 wherein the central segment is displaced from the axis by about 0.06 inches.
Claim 19
Dependent Claim
21 words
A guide wire system as defined in claim 17 wherein the overall length of the trapezoidally-shaped portion is approximately 0.60 inches.
Claim 20
Dependent Claim
17 words
A guide wire system as defined in claim 1 wherein said body lumen comprises a blood vessel.
Claim 21
Dependent Claim
18 words
A guide wire system as defined in claim 1 wherein said guide wire is round in cross section.
Claim 22
Dependent Claim
26 words
A guide wire system as defined in claim 1 further comprising, in combination, a flexible catheter, and wherein the guide wire is longer than the catheter.
Claim 23
Dependent Claim
194 words
A guide wire system for guiding an elongate, flexible catheter having a guide wire lumen through a lumen in the body of a patient comprising: a guide wire having a proximal end and a distal end; an extension wire having a proximal end and a distal end; tubular connector means for connection of the proximal end of the guidewire with the distal end of the extension wire, thereby to extend the effective length of the guide wire; said guide wire being rounded in cross-section; said connector means being round in cross-section and having a diameter no greater than that of the guide wire thereby to enable the catheter to be passed over the wires and the connector means when the wires are connected by the connector means; whereby a catheter placed in a patient and having the guide wire extending therethrough may be exchanged for another catheter by connecting the proximal end of the guide wire with the distal end of the extension wire, then removing the catheter over the connected wires and then advancing another catheter onto and along the wires without requiring removal of substantial change of position of the guide wire.
Claim 24
Dependent Claim
194 words
A guide wire system for guiding an elongate, flexible catheter having a guide wire lumen through a lumen in the body of a patient comprising: a guide wire having a proximal end and a distal end; an extension wire having a proximal end and a distal end; tubular connector means for connection of the proximal end of the guidewire with the distal end of the extension wire, thereby to extend the effective length of the guide wire; said guide wire being rounded in cross-section; said connector means being round in cross-section and having a diameter no greater than that of the guide wire thereby to enable the catheter to be passed over the wires and the connector means when the wires are connected by the connector means; whereby a catheter placed in a patient and having the guide wire extending therethrough may be exchanged for another catheter by connecting the proximal end of the guide wire with the distal end of the extension wire, then removing the catheter over the connected wires and then advancing another catheter onto and along the wires without requiring removal of substantial change of position of the guide wire.
Claim 25
Dependent Claim
194 words
A guide wire and catheter system comprising: an elongate flexible catheter having a guide wire lumen; a guide wire having a proximal end and a distal end and being receivable in the guide wire lumen of the catheter, the guide wire being longer than the catheter; an extension wire having a proximal end and a distal end; tubular connector means for connection of the proximal end of the guide wire with the distal end of the extension wire thereby to extend the effective length of the guide wire; said tubular connector means being constructed and arranged to be received within the catheter lumen and to enable the catheter to be passed over the wires and the connector means when the wires are connected by the connector means; whereby a catheter placed in a patient and having the guide wire extending therethrough may be exchanged for another catheter by connecting the proximal end of the guide wire with the distal end of the extension wire, then removing the catheter over the connected wires and then advancing another catheter onto and along the wires without requiring removal of substantial change of position of the guide wire.
Claim 26
Dependent Claim
194 words
A guide wire and catheter system comprising: an elongate flexible catheter having a guide wire lumen; a guide wire having a proximal end and a distal end and being receivable in the guide wire lumen of the catheter, the guide wire being longer than the catheter; an extension wire having a proximal end and a distal end; tubular connector means for connection of the proximal end of the guide wire with the distal end of the extension wire thereby to extend the effective length of the guide wire; said tubular connector means being constructed and arranged to be received within the catheter lumen and to enable the catheter to be passed over the wires and the connector means when the wires are connected by the connector means; whereby a catheter placed in a patient and having the guide wire extending therethrough may be exchanged for another catheter by connecting the proximal end of the guide wire with the distal end of the extension wire, then removing the catheter over the connected wires and then advancing another catheter onto and along the wires without requiring removal of substantial change of position of the guide wire.
Claim 27
Dependent Claim
210 words
In a guide wire system for guiding an elongate, flexible catheter having a guide wire lumen through a lumen in the body of the patient, said system having a guide wire having proximal and distal ends, the improvement comprising: an extension wire having a proximal end and a distal end; connector means on at least one of said wires for connecting the proximal end of the guide wire with the distal end of the extension wire thereby to extend the effective length of the guide wire; said connector means being constructed and arranged to be received within the catheter lumen and to have a low profile in which its cross-sectional dimensions are substantially the same as those of the wires to enable the catheter to be passed over the wires and the connector means when the wires are connected by the connector means; whereby a catheter placed in a patient and having the guide wire extending therethrough may be exchanged for another catheter by connecting the proximal end of the guide wire with the distal end of the extension wire, then removing the catheter over the connected wires and then advancing another catheter onto and along the wires without requiring removal or substantial change of position of the guide wire.
Claim 28
Dependent Claim
210 words
In a guide wire system for guiding an elongate, flexible catheter having a guide wire lumen through a lumen in the body of the patient, said system having a guide wire having proximal and distal ends, the improvement comprising: an extension wire having a proximal end and a distal end; connector means on at least one of said wires for connecting the proximal end of the guide wire with the distal end of the extension wire thereby to extend the effective length of the guide wire; said connector means being constructed and arranged to be received within the catheter lumen and to have a low profile in which its cross-sectional dimensions are substantially the same as those of the wires to enable the catheter to be passed over the wires and the connector means when the wires are connected by the connector means; whereby a catheter placed in a patient and having the guide wire extending therethrough may be exchanged for another catheter by connecting the proximal end of the guide wire with the distal end of the extension wire, then removing the catheter over the connected wires and then advancing another catheter onto and along the wires without requiring removal or substantial change of position of the guide 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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |