Catheter exchange system with detachable luer fitting
First Claim
1. A balloon dilatation catheter assembly 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; and
a second elongate tubular flexible element having a lumen extending therethrough and being advanceable over the shaft of the dilatation catheter.
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Accused Products
Abstract
A small diameter balloon dilatation catheter having a shaft formed from hypodermic tubing is provided with a detachable luer fitting on its proximal end. The luer fitting may be removed and an extension wire attached to the proximal end of the catheter. A larger diameter catheter then may be advanced over the smaller catheter utilizing the smaller catheter to guide the larger catheter to the stenosis being treated. In another aspect of the invention, a guiding sheath assembly 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.
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Citations
17 Claims
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1. A balloon dilatation catheter assembly comprising:
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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; and a second elongate tubular flexible element having a lumen extending therethrough and being advanceable over the shaft of the dilatation catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for performing an angioplasty comprising:
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providing a 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; and
a fitting with communicating with the lumen, the fitting being detachably connected to the proximal end of the shaft;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.
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12. A method for performing an angioplasty catheter exchange comprising:
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providing a 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; and
a fitting with communicating with the lumen, the fitting being detachably connected to the proximal end of the shaft;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. - View Dependent Claims (13)
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14. A method for performing an angioplasty catheter exchange for an indwelling dilatation catheter having a removable guidewire extending therethrough comprising:
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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. - View Dependent Claims (15)
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16. A method for performing an angioplasty catheter exchange comprising:
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providing a 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; and
a fitting with communicating with the lumen, the fitting being detachably connected to the proximal end of the shaft;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. - View Dependent Claims (17)
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Specification