Patent ID: 7195611

Claim:
A balloon catheter, comprising: a) an elongated shaft having a proximal end, a distal end, an inflation lumen extending from the proximal end to a location proximal of the distal end of the shaft, a guidewire lumen extending from a location distal of the proximal end to the distal end of the shaft, and i) a proximal shaft section comprising a proximal tubular member having a proximal end and a distal end, and defining a proximal section of the inflation lumen; and ii) a distal shaft section comprising an outer tubular member and an inner tubular member, the outer tubular member having a proximal end secured to a distal end of the proximal shaft section, a distal end, and an opening in a sidewall thereof, and the inner tubular member comprising a polymeric tube, and the inner tubular member having a proximal end, a distal end, a distal portion at least in part extending within the outer tubular member, and a proximal portion extending through the sidewall opening of the outer tubular member and along an outer surface of a portion of the outer tubular member located proximal to the sidewall opening, with polymeric filler material extending at least partially around an outer surface of the inner tubular member and having a length extending at least along the proximal portion of the inner tubular member such that the filler is between the outer surface of the inner tubular member and the outer surface of the same outer tubular member within which the inner tubular member is disposed, the inner tubular member defining the guidewire lumen so that the inner tubular member proximal portion defines a portion of the guidewire lumen extending proximal from the sidewall opening of the outer tubular member, and the outer tubular member defining a distal section of the inflation lumen in fluid communication with the proximal section of the inflation lumen; and b) a balloon on the distal shaft section, having an interior in fluid communication with the inflation lumen.