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US 6,319,228 B1Granted
Multilayer interventional catheter
AssigneeSchneider (Europe) A.G.
InventorGerhard Kastenhofer
Life of this patent
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Abstract
The catheter comprises a catheter tube formed of two superposed tubular layers of materials which differ from one another. A tubular mediator layer is arranged between the layers to provide an adhesive anchorage for the layers.
Claims8
An interventional catheter comprising:
- a catheter tube having at least two superposed layers of materials, including an inner layer and an outer layer, secured together and with mechanical properties differing from one another, a guidewire lumen in the catheter tube for the sliding fit of a guidewire, and a balloon with a distal end sealingly surrounding the catheter tube, whereby the inner layer comprises high-density polyethylene and forms the guidewire lumen, and the outer layer comprises polyamide and forms an outer surface of the catheter tube, wherein the catheter tube further comprises a mediator layer of low-density polyethylene arranged between the inner layer and the outer layer for adhesive anchorage of the layers thereto.
A catheter comprising:
- (a) a rube comprising:
- (i) an outermost layer comprising a polyamide having a first coefficient of friction;
- (ii) an innermost layer coextensive with the outermost layer and forming a guidewire lumen, the innermost layer comprising a high-density polyethylene having a second coefficient of friction which is less than the first coefficient of friction;
- and
- (iii) a middle layer disposed between the outermost layer and the innermost layer and affixing the outermost layer to the innermost layer, the middle layer comprising a low-density polyethylene;
- and
- (b) a balloon with at least a distal end of the balloon sealed to the tube.
4 more elements
A catheter comprising:
- (a) a first tube comprising:
- (i) an outermost layer comprising a polyamide having a first coefficient of friction;
- (ii) an innermost layer coextensive with the outermost layer and forming a guidewire lumen, the innermost layer comprising a high-density polyethylene having a second coefficient of friction which is less than the first coefficient of friction;
- and
- (iii) a middle layer disposed between the outermost layer and the innermost layer and affixing the outermost layer to the innermost layer, the middle layer comprising a low-density polyethylene;
- (b) a second tube disposed about a portion of the first tube;
- and
- (c) a balloon with a distal end sealingly surrounding the first tube and a proximal end sealingly surrounding the second tube.
5 more elements
Dependencies are inferred from the claim text.