Patent ID: 7001420

Claim:
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.