Patent ID: 8888741

Claim:
A balloon catheter, comprising: an outer shaft having a distal end and a fluid line; an inner shaft, provided at least at the distal end of the outer shaft, which projects beyond the distal end of the outer shaft; and, a balloon which is dilatable under the influence of a fluid introduced through the fluid line under pressure, and which at its proximal end is attached in a fluid-tight manner to the distal end of the outer shaft at a first attachment zone, at its distal end is attached in a fluid-tight manner to the distal end of the inner shaft at a second attachment zone, the balloon being adhered to the inner shaft along an entire length of the second attachment zone, and between the attachment zones, in the undilated state is placed in longitudinal folds along its length, characterized in that the balloon, at its distal end, has an untapered design with a thin wall thickness which is essentially unchanged over the length of the balloon, and the longitudinal folds extend into the second attachment zone at that location.