Composite vascular catheter
First Claim
1. In a vascular dilation catheter for angioplasty procedures having an elongated outer tubular member which has a distal end, an inflatable balloon which has a distal end and which is on the distal end of the outer tubular member and an inner tubular member which has a distal end and an inner lumen adapted to receive a guidewire therein disposed within the outer tubular member forming therebetween an annular inflation lumen, the distal end of the inner tubular member being secured to the distal end of the balloon, the improvement in the catheter body comprising the inner tubular member having a tubular substructure and at least one fibrous, resin impregnated layer formed on the exterior thereof which provides longitudinal flexibility and diametric rigidity.
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Accused Products
Abstract
An improved vascular catheter having a tubular member of composite structure with a tubular substrate and a resin-impregnated fibrous covering extending over a substantial part of the length thereof. The tubular substrate which is longitudinally flexible but relatively inextendible, is preferably polyimide tubing with a lubricious coating on the inner surface thereof defining an inner lumen. The fibrous covering is preferably epoxy-impregnated aramid or polyester (Dacron) multi-filament fibers. The strands are is snugly wrapped about the tubular substrate and then impregnated with a suitable resin. One or more of the strands in the distal portion are at an angle with respect to the longitudinal axis of the tubular substrate between about 20° and about 45° greater than the angle of one or more strands in the proximal portion. Individual strand wraps in the distal portion are at an angle of about 60° to about 85° and strand wraps in such as the proximal portion are at an angle of about 30° to about 60°. The composite tubular member is preferably utilized in balloon dilatation catheters used in angioplasty procedures.
272 Citations
24 Claims
- 1. In a vascular dilation catheter for angioplasty procedures having an elongated outer tubular member which has a distal end, an inflatable balloon which has a distal end and which is on the distal end of the outer tubular member and an inner tubular member which has a distal end and an inner lumen adapted to receive a guidewire therein disposed within the outer tubular member forming therebetween an annular inflation lumen, the distal end of the inner tubular member being secured to the distal end of the balloon, the improvement in the catheter body comprising the inner tubular member having a tubular substructure and at least one fibrous, resin impregnated layer formed on the exterior thereof which provides longitudinal flexibility and diametric rigidity.
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10. A vascular dilation catheter assembly for performing angioplasty procedures comprising
(a) an elongated outer tubular member with proximal and distal ends; -
(b) an inflatable balloon which has a distal end and which is on the distal end of the outer tubular member; and (c) an elongated inner tubular member which is disposed within the outer tubular member thereby forming an annular inflation lumen therebetween and which has a distal end bonded to the distal end of the balloon, the inner tubular member having an inner lumen adapted to receive a guidewire therein and, a tubular substructure and at least one fibrous, resin impregnated layer on the exterior thereof. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification