Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1989-01-27
1991-07-30
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604243, 2853344, A61M 2900
Patent
active
050356860
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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"Abdominal Aortography: A New Catheter Tip Closing Obturator for Percutaneous Technique", by Straube et al., Radiology, vol. 81, No. 2, pp. 264-266, Aug. 1963.
Page from USCI 1969 Products Catalog--"Strabue Tip Occluder Assembly".
Crittenden James F.
Purtell George J.
C. R. Bard Inc.
Yasko John D.
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