Coil reinforced multilayered inner tubular member for a balloon catheter
AssigneeAdvanced Cardiovascular Systems, Inc.
InventorsMarc L. Speck, Sharon Wong, Jeong S. Lee, Matthew Chludzinski
Life of this patent
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Abstract
A catheter having an elongated shaft formed of a polymeric tubular member with at least a section having a lubricious inner layer defining the guidewire lumen, a coiled support member at least partially embedded in the lubricious inner layer, and an outer layer on an outer surface of at least a distal portion of the lubricious inner layer. In a presently preferred embodiment, the coil supported polymeric tubular member forms an inner tubular member of a balloon catheter.
Claims19
A balloon catheter, comprising:
- a) an elongated shaft having an outer tubular member defining an inflation lumen, and an inner tubular member having an inner surface defining a guidewire lumen, the inner tubular member comprising a polymeric tubular member with at least a section having an inner lubricious layer, an intermediate layer on an outer surface of the inner layer, an outer layer on an outer surface of the intermediate layer, and a coiled support member having coils partially embedded in the inner layer so that the guidewire lumen is defined by an inner exposed surface of the coiled support member together with an inner surface of the inner lubricious layer interspersed between the coils of the coiled support member;
- and
- b) an inflatable balloon on a distal shaft section having an interior in fluid communication with the inflation lumen and a distal skirt section fusion bonded to the inner tubular member outer layer.
A method of making an elongated tubular shaft for a balloon catheter, comprising winding a wire or ribbon having a lubricious polymeric coating thereon on a mandrel, and placing at least a section of the mandrel and the wound wire or ribbon thereon in a lumen of a polymeric tubular member and applying heat and pressure thereto with heat shrink tubing around an outer surface of the polymeric tubular member, to form an elongated tubular shaft having an inner lubricious layer defining a lumen of the shaft and having a wall thickness of about 0.001 to about 0.003 inches and formed at least in part by the lubricious polymeric coating on the wire or ribbon, a coiled wire or ribbon embedded in the inner layer, and an outer layer on an outer surface of at least a distal portion of the inner layer and formed by the polymeric tubular member.
Dependencies are inferred from the claim text.