Patent FR1518083A successfully refreshed from Google Patents.
EP0380227A2
Expired / Lapsed
EP
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Catheter exchange system with detachable luer fitting
Assignee: CR Bard Inc
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Filing: 1990-01-16
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Granted: —
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Expires: 2010-01-16
Abstract
Abstract A small diameter balloon dilatation catheter (10) having a shaft (12) formed from hypodermic tubing is provided with a detachable luer fitting (18) on its proximal end. The luer fitting may be removed and an extension wire (52) attached to the proximal end of the catheter. A larger diameter catheter (56) then may be advanced over the smaller catheter (51) utilizing the smaller catheter to guide the larger catheter to the stenosis (59) being treated. In another aspect of the invention, a guiding sheath assembly (60) is provided which permits catheter exchanges involving such small diameter catheters having integral guidewires. In one protocol such a catheter may be exchanged for a conventional balloon dilatation catheter with a movable guidewire by removing the dilatation catheter, advancing the sheath over the guidewire, then removing the guidewire and inserting the replacement catheter. Similarly, a catheter having an integral guidewire may be exchanged for a similar catheter by first removing the luer fitting at the proximal end of the catheter, then attaching a wire extension to the proximal end of the catheter, then advancing a sheath over the extension and catheter to locate the distal end of the sheath in proximity to the stenosis, then removing the catheter through the sheath and replacing that catheter with a new catheter inserted through the sheath.
Inventors
- 👤 James F. Crittenden
- 👤 George J. Purtell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0169; A61M25/09; A61M25/10; A61M25/104; A61M2025/09008; A61M25/1011; A61M2025/1015
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
55 words
A balloon dilatation catheter comprising: a tubular shaft having a tubular proximal end and defining a lumen extending therethrough; a dilatation balloon mounted to the distal end of the shaft and in communication with the lumen; a fitting for communicating with the lumen, the fitting being detachably connected to the proximal end of the shaft.
Claim 2
Dependent Claim
55 words
A balloon dilatation catheter comprising: a tubular shaft having a tubular proximal end and defining a lumen extending therethrough; a dilatation balloon mounted to the distal end of the shaft and in communication with the lumen; a fitting for communicating with the lumen, the fitting being detachably connected to the proximal end of the shaft.
Claim 3
Dependent Claim
16 words
A balloon dilatation catheter as defined in claim 1 wherein the fitting comprises a luer fitting.
Claim 4
Dependent Claim
160 words
A balloon dilatation catheter as defined in claim 2 wherein said fitting comprises: a hollow hub having a passageway extending therethrough and adapted to receive the tubular proximal end of the shaft, the interior of the hub having a distally tapering surface; a collet having a central bore therethrough adapted to receive the tubular proximal end of the shaft, the collet being receivable within the bore of the hub, the collet having a plurality of axially extending fingers, the distal ends of the fingers being tapered to mate with the tapered surface in the hub whereby drawing together of the hub and collet will cause the fingers of the collet to constrict tightly about the tubular shaft; a luer body threadably connected to the proximal end of the hub, said luer body having means for urging the collet distally into engagement with the tapered surface of the interior of the hub when the luer body and hub are screwed together.
Claim 5
Dependent Claim
97 words
A catheter as defined in claim 3 wherein said means comprises: a stop member carried by the luer body, the stop member being constructed to engage the proximal end of the tubular catheter shaft to preclude movement of the shaft proximally of the stop member, the stop member having an aperture formed therethrough to permit fluid communication between the lumen in the shaft and the interior of the luer body; and a compressible gasket disposed between the stop member and the collet, the gasket having a hole formed therethrough which receives the tubular shaft of the catheter.
Claim 6
Dependent Claim
41 words
A catheter as defined in claim 4 wherein the stop member has at its distal face a proximally tapering bore, the proximal end of the taper defining a smaller diameter than the diameter at the proximal end of the tubular shaft.
Claim 7
Dependent Claim
37 words
A dilatation catheter assembly comprising a balloon catheter as defined in claim 1 and further comprising a second elongate tubular flexible element having a lumen extending therethrough and being advanceable over the shaft of the dilatation catheter.
Claim 8
Dependent Claim
17 words
An assembly as defined in claim 6 wherein the second tubular element comprises another balloon dilatation catheter.
Claim 9
Dependent Claim
40 words
An assembly as defined in claim 6 wherein said second tube comprises a guide sheath having an inner diameter through which the dilatation catheter or a guidewire can be withdrawn and through which another catheter or guidewire can be passed.
Claim 10
Dependent Claim
22 words
An assembly as defined in claim 8 wherein the second tube comprises an assembly of an inner sheath and an outer sheath.
Claim 11
Dependent Claim
45 words
An assembly as defined in claim 9 wherein the outer sheath of the guide sheath assembly has an elongate flexible proximal portion and a distal portion connected to and extending distally from the proximal portion, the distal portion being more flexible than the proximal portion.
Claim 12
Dependent Claim
109 words
An assembly as defined in claim 8 further comprising: the guide sheath having a flexible distal end; and a helical coil mounted to the distal end of the guide sheath, the turns of the coil being slightly spaced from each other, the ends of the coil being attached to the guide sheath whereby in a relaxed configuration the portion of the guide sheath including the coil remains flexible, the spacing of the turns of the coil being such that upon application of an axial load to the distal end of the guide sheath, the coils will abut each other thereby to define a relatively rigid column resistant to buckling.
Claim 13
Dependent Claim
24 words
An assembly as defined in claim 11 further comprising: a relatively soft elastomeric short tip attached to the outer sheath distally of the coil.
Claim 14
Dependent Claim
16 words
An assembly as defined in claim 11 further comprising: the coil further defining a radiopaque element.
Claim 15
Dependent Claim
21 words
A dilatation catheter assembly as defined in any of claims 8-13 wherein the inner sheath is longer than the outer sheath.
Claim 16
Dependent Claim
67 words
A dilatation catheter assembly as defined in any of claims 9-13 wherein each of the sheaths has a luer fitting at its proximal end, the luer fitting of the inner sheath having a purging port disposed to communicate the lumen of the proximal fitting of the inner sheath with the lumen of the proximal fitting of the outer sheath when the fittings of the sheaths are connected.
Claim 17
Dependent Claim
52 words
A method for performing an angioplasty comprising: providing a dilatation catheter as defined in claim 1; detaching said luer fitting from the catheter shaft; attaching an extension wire to the proximal end of the catheter shaft; and passing a second, larger catheter over the extension wire and shaft of the dilatation catheter.
Claim 18
Dependent Claim
105 words
A method for performing an angioplasty catheter exchange comprising: providing a dilatation catheter as defined in claim 1; detaching the luer fitting from the shaft of the dilatation catheter; attaching an extension wire to the proximal end of the catheter shaft; advancing a guide sheath over the extension wire and catheter shaft so that the distal end of the guide sheath enters the coronary arteries and advances to a location adjacent the stenosis; removing the dilatation catheter through the guide sheath while maintaining the position of the guide sheath; and thereafter inserting a second catheter through the guide sheath and advancing it to the stenosis.
Claim 19
Dependent Claim
71 words
A method as defined in claim 17 further comprising: said guide sheath comprising a dual sheath including an inner sheath and an outer sheath, said combined inner and outer sheaths being advanced in unison over the extension wire and catheter shaft; and removing the inner sheath and extension wire and dilatation catheter before inserting said second catheter whereby said second catheter is inserted through and guided by the outer guide sheath.
Claim 20
Independent Claim
102 words
A method for performing an angioplasty catheter exchange for an indwelling dilatation catheter having a removable guidewire extending therethrough comprising: providing a means for effectively extending the guidewire length, either by extension of the existing guidewire or replacement with a longer exchange wire; removing the angioplasty catheter over the extended length guidewire; passing a guide sheath over the extended length guidewire so that the distal end of the guide sheath enters the coronary arteries and advances to a location adjacent the stenosis; removing the guidewire; and thereafter passing a small diameter angioplasty catheter through the sheath and advancing it to the stenosis.
Claim 21
Independent Claim
102 words
A method for performing an angioplasty catheter exchange for an indwelling dilatation catheter having a removable guidewire extending therethrough comprising: providing a means for effectively extending the guidewire length, either by extension of the existing guidewire or replacement with a longer exchange wire; removing the angioplasty catheter over the extended length guidewire; passing a guide sheath over the extended length guidewire so that the distal end of the guide sheath enters the coronary arteries and advances to a location adjacent the stenosis; removing the guidewire; and thereafter passing a small diameter angioplasty catheter through the sheath and advancing it to the stenosis.
Claim 22
Dependent Claim
52 words
A method as defined in claim 19 further comprising: said guide sheath comprising a dual sheath including an inner sheath and an outer sheath, said combined inner and outer sheaths being advanced in unison over the extended guidewire; and removing the inner sheath and guidewire before inserting said small diameter angioplasty catheter.
Claim 23
Dependent Claim
104 words
A method for performing an angioplasty catheter exchange comprising: providing a dilatation catheter as defined in claim 1; detaching the luer fitting from the shaft of the dilatation catheter; attaching an extension wire to the proximal end of the catheter shaft; advancing a guide sheath over the extension wire and catheter shaft so that the distal end of the guide sheath enters the coronary arteries and advances to a location adjacent the stenosis; removing the dilatation catheter through the guide sheath while maintaining the position of the guide sheath; and thereafter inserting a guidewire through the guide sheath and advancing it to the stenosis.
Claim 24
Dependent Claim
55 words
A method as defined in claim 21 further comprising: said guide sheath comprising a dual sheath including an inner sheath and an outer sheath, said combined inner and outer sheaths being advanced in unison over the extension wire and catheter shaft; and removing the inner and outer sheath thereby leaving the guidewire in the patient.
References Cited (Backward Citations)
No citation records indexed.
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