GB2180454A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Catheter exchange method and means therefor
Assignee: CR Bard Inc
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Filing: 1986-06-30
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Granted: —
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Expires: 2006-06-30
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. <IMAGE>
Inventors
- 👤 Richard A Gambale
- 👤 James Frederick Crittenden
- 👤 James Patrick Ryan
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 05:23
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0169; A61M25/09; A61M25/0905; B; B21; B21F; B21F1/00; B21F1/004; B21F15/00; B21F15/02; B21F15/06; A61M25/09041
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
71 words
A guide wire system for guiding an elongate, flexible catheter through a patient comprising:
a guide wire having a proximal and a distal end and being longer than the catheter;
an extension wire having a proximal and a distal end;
connector means for enabling 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.
Claim 2
Dependent Claim
71 words
A guide wire system for guiding an elongate, flexible catheter through a patient comprising:
a guide wire having a proximal and a distal end and being longer than the catheter;
an extension wire having a proximal and a distal end;
connector means for enabling 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.
Claim 3
Dependent Claim
29 words
A guide wire system as defined in claim 1 wherein the combined length of the guide wire and the extension wire is approximately twice the length of the catheter.
Claim 4
Dependent Claim
36 words
A guide wire system as defined in claim 1 wherein the 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
17 words
A guide wire system as defined in claim 3 wherein said mechanical interlock comprises a crimped interlock.
Claim 7
Dependent Claim
37 words
A guide wire system as defined in claim 3 further comprising:
said mechanical interlocks being constructed and arranged so as to have a compressive strength sufficient to withstand an axial load of the order of one pound.
Claim 8
Dependent Claim
36 words
A guide wire system as defined in claim 4 further comprising:
said mechanical interlocks being constructed and arranged so asto have a compressive strength sufficient to withstand an axial load of the order of one pound.
Claim 9
Dependent Claim
74 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;
said mated end and tubular socket being adapted to be deformed transversely into a generally Ushaped 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 guide wire is dimensioned to be received within the tubular socket.
Claim 11
Dependent Claim
29 words
A guide wire system as defined in claim 9 wherein said general U-shape comprises a generally trapezoidally-shaped portion having a central segment and a pair of sloped end segments.
Claim 12
Dependent Claim
31 words
A guide wire system as defined in claim 10 wherein said sloped segments extend at an angle of about 300 to the central axis of the guide wire and extension wire.
Claim 13
Dependent Claim
47 words
A guide wire system as defined in claim 10 wherein the central segment is displaced from the axis of the guide wire system 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 14
Dependent Claim
27 words
A guide wire system as defined in claim 12 wherein the central segment is displaced from the axis of the guide wire system by about .06 inches.
Claim 15
Dependent Claim
20 words
A guide wire system as defined in claim 13 wherein the overall length of the crimp is approximately .60 inches.
Claim 16
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 17
Dependent Claim
17 words
A guide wire system as defined in claim 15 wherein the extension wire is a solid rod.
Claim 18
Dependent Claim
40 words
A guide wire system as defined in claim 9 further comprising:
a tubular member secured to the proximal end of the guide wire, the tubular member defining a deep socket adapted to receive the distal end of the extension wire.
Claim 19
Dependent Claim
55 words
A guide wire system as defined in claim 17 further comprising:
the guide wire socket being in the form of a thin walled tube of the order of four inches long, having a wall thickness of between about .0015 and .003 inches, the socket in the tube being of the order of three inches deep.
Claim 20
Dependent Claim
65 words
A guide wire system as defined in claim 18 wherein the connector means comprises:
an elongate tube attached to the proximal end of the wire-like member, the tube being adapted to receive the other wire, the tube being constructed and arranged so that it contains the other wire, the tube and the other wire may be crimped in a manner to effect a mechanical interlocktherebetween.
Claim 21
Independent Claim
207 words
A method for effecting a catheter exchange comprising:
providing a guide wire having a proximal end and a distal end;
providing a first catheter having a proximal end and a distal end, the first catheter being shorter than the guide wire;
placing the guide wire within a patient's blood vessel so that the proximal end of the guide wire protrudes exteriorly of the patient;
placing the first catheter in a patient's blood vessel over the guide wire so that the proximal end of the catheter protrudes exteriorly of the patient and with the proximal end of the guide wire protruding proximally of the proximal end of the catheter;
attaching an extension wire to the proximal end of the guide wire;;
while holding either of the guide wire or extension wire to maintain the position of the guide wire in the patient's vessel, drawing the first catheter proximally over the guide wire and extension wire to remove the first catheter from the patient's blood vessel;
placing a second catheter over the proximal end of the exchange wire and advancing the second catheter over the extension wire and guide wire and into the patient's blood vessel,
thereby to effect said catheter change without requiring removal of the guide wire.
Claim 22
Independent Claim
207 words
A method for effecting a catheter exchange comprising:
providing a guide wire having a proximal end and a distal end;
providing a first catheter having a proximal end and a distal end, the first catheter being shorter than the guide wire;
placing the guide wire within a patient's blood vessel so that the proximal end of the guide wire protrudes exteriorly of the patient;
placing the first catheter in a patient's blood vessel over the guide wire so that the proximal end of the catheter protrudes exteriorly of the patient and with the proximal end of the guide wire protruding proximally of the proximal end of the catheter;
attaching an extension wire to the proximal end of the guide wire;;
while holding either of the guide wire or extension wire to maintain the position of the guide wire in the patient's vessel, drawing the first catheter proximally over the guide wire and extension wire to remove the first catheter from the patient's blood vessel;
placing a second catheter over the proximal end of the exchange wire and advancing the second catheter over the extension wire and guide wire and into the patient's blood vessel,
thereby to effect said catheter change without requiring removal of the guide wire.
Claim 23
Dependent Claim
18 words
A method as defined in claim 20 further comprising:
thereafter separating the extension wire from the guide wire.
Claim 24
Dependent Claim
56 words
A method as defined in claim 20 wherein said step of connecting the extension wire to the guide wire comprises:
providing one of said guide wire or extension wire with a tubular socket and inserting an end of the other of said guide wire or extension wire into said socket; and
mechanically crimping said mated portion.
Claim 25
Dependent Claim
154 words
A tool for crimping a first wire having a tubular socket at one end and a second wire receivable within the socket comprising:
a pair of jaws mounted for movement toward and away from each other;
said jaws having facing surfaces contoured to cooperate in a manner which, when the jaws are butted together, will impart a crimp to a member disposed between the jaws;
said jaws having a first position in which they are brought together only sufficiently to hold a slender tubular member in substantially straight configuration;
said jaws further having guide means for aligning and guiding a wire into an open end of the socket in said tubular member thereby to combine the wire and socket; and
said jaws having a second position in which the jaws are brought together to effect a crimp in the combined tubular socket and wire end, thereby to mechanically secure the wire to the tube.
Claim 26
Dependent Claim
154 words
A tool for crimping a first wire having a tubular socket at one end and a second wire receivable within the socket comprising:
a pair of jaws mounted for movement toward and away from each other;
said jaws having facing surfaces contoured to cooperate in a manner which, when the jaws are butted together, will impart a crimp to a member disposed between the jaws;
said jaws having a first position in which they are brought together only sufficiently to hold a slender tubular member in substantially straight configuration;
said jaws further having guide means for aligning and guiding a wire into an open end of the socket in said tubular member thereby to combine the wire and socket; and
said jaws having a second position in which the jaws are brought together to effect a crimp in the combined tubular socket and wire end, thereby to mechanically secure the wire to the tube.
Claim 27
Dependent Claim
15 words
A device as defined in claim 23 wherein said crimp is substantially trapezoidal in shape.
Claim 28
Dependent Claim
121 words
A device as defined in claim 31 further comprising:
a first of said jaws having a platform which defines a generally trapezoidal configuration;
the other of said jaws having a trapezoidal indentation adapted to substantially mate with the trapezoidal platform; a transversely extending groove formed on the platform, the groove being adapted to receive partly said tubular member;
the other of the jaws having a pair of transversely spaced portions adapted to engage the tubular member;
said aliging means comprising means forming guiding passageways on each of the jaws which, when the jaws are in said first position, define a passageway for the wire, the passageway being in alignment with the transverse groove when the jaws are in the first position.
Claim 29
Dependent Claim
40 words
A device as defined in claim 25 wherein said aligning means is constructed and arranged so that it is movable in unison with the second of said jaws during movement of said jaws from the first to the second position.
Claim 30
Dependent Claim
14 words
A guide wire system substantially as herein described with reference to the accompanying drawings.
Claim 31
Dependent Claim
14 words
A guide wire system substantially as herein described with reference to the accompanying drawings.
Claim 32
Independent Claim
17 words
A method of effecting a catheter exchange substantially as herein described with reference to the accompanying drawings.
Claim 33
Independent Claim
17 words
A method of effecting a catheter exchange substantially as herein described with reference to the accompanying drawings.
Claim 34
Dependent Claim
22 words
A tool for use in a method for effecting a catheter exchange substantially as herein described with reference to the accompanying drawings.
Claim 35
Dependent Claim
22 words
A tool for use in a method for effecting a catheter exchange substantially as herein described with reference to the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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