Patent ID: 7967781

Claim:
A rapid-exchange 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 rapid-exchange proximal port distal of the proximal end of the shaft to a distal port at the distal end of the shaft, and i) a proximal shaft section having a proximal end, a distal end, and a proximal section of the inflation lumen therein; and ii) a distal shaft section comprising an outer tubular member having a distal section of the inflation lumen therein, and an inner tubular member having the guidewire lumen therein, the inner tubular member extending within at least a portion of the outer tubular member and through a sidewall opening of the outer tubular member such that a proximal portion of the inner tubular member proximal to the sidewall opening extends along and is secured to an outer surface of the same outer tubular member within which a distally adjacent portion of the inner tubular member is disposed, with polymeric filler material around the inner and outer tubular members from the sidewall opening to the guidewire rapid-exchange proximal port; and b) a balloon on the distal shaft section, having an interior in fluid communication with the inflation lumen.