Dilatation catheter and method for widening of strictures
First Claim
1. A method of widening a stricture in a blood vessel, the method comprising:
- a) providing a dilatation catheter comprising an elongated dilatation balloon arranged on a support tube and extensible up to a defined extent by means of an external pressure/section pump connected to the support tube, and a sealing balloon arranged on the support tube in the axial direction distally of and at a distance from the dilatation balloon, the wall of which sealing balloon is elastically extensible by means of an external pressure/suction pump connected to the support tube to seal off the vessel distally of the structure, with a draw-off and inlet opening being provided in the support tube distal to the dilatation balloon and proximal to the sealing balloon, said opening being of a size sufficient to accommodate detached structure material which can be drawn off to the exterior of the catheter or through which a washing fluid can be introduced;
b) positioning the dilatation catheter at the site of a stricture so that the sealing balloon is situated distally of the stricture and the dilatation balloon is situated within the stricture;
c) inflating the sealing balloon to an extent sufficient to seal off the vessel distally of the stricture;
d) inflating the dilatation balloon to an extent sufficient to widen the stricture;
e) drawing off any detached stricture material through the opening while simultaneously or immediately thereafter deflating the dilatation balloon; and
f) deflating the sealing balloon and removing the dilatation catheter from the site of the stricture.
1 Assignment
0 Petitions
Accused Products
Abstract
A dilatation catheter intended in particular for treatment of strictures in the carotid artery has at its front end a dilatation balloon, which is inserted in the folded state into the carotid artery and is inflated in order to widen the stricture. In front of the dilatation balloon a sealing balloon is arranged which serves to seal off the carotid artery downstream of the stricture, in order thereby to prevent a migration of any stricture material which may become detached during treatment, and thus to avoid the risk of an embolism. Between the dilatation balloon and the sealing balloon there is a draw-off and inlet opening through which, after widening and with the sealing balloon inflated, detached stricture material can be drawn off or washed away.
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Citations
8 Claims
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1. A method of widening a stricture in a blood vessel, the method comprising:
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a) providing a dilatation catheter comprising an elongated dilatation balloon arranged on a support tube and extensible up to a defined extent by means of an external pressure/section pump connected to the support tube, and a sealing balloon arranged on the support tube in the axial direction distally of and at a distance from the dilatation balloon, the wall of which sealing balloon is elastically extensible by means of an external pressure/suction pump connected to the support tube to seal off the vessel distally of the structure, with a draw-off and inlet opening being provided in the support tube distal to the dilatation balloon and proximal to the sealing balloon, said opening being of a size sufficient to accommodate detached structure material which can be drawn off to the exterior of the catheter or through which a washing fluid can be introduced; b) positioning the dilatation catheter at the site of a stricture so that the sealing balloon is situated distally of the stricture and the dilatation balloon is situated within the stricture; c) inflating the sealing balloon to an extent sufficient to seal off the vessel distally of the stricture; d) inflating the dilatation balloon to an extent sufficient to widen the stricture; e) drawing off any detached stricture material through the opening while simultaneously or immediately thereafter deflating the dilatation balloon; and f) deflating the sealing balloon and removing the dilatation catheter from the site of the stricture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification