The present invention relates to a method of making a balloon catheter comprising providing a hypotube and a guidewire tube, cutting the hypotube to form one or more cuts in a proximal portion of the hypotube and one or more cuts in a distal portion of the hypotube, forming an opening through the wall of the hypotube, passing the guidewire tube through the opening and distally through a lumen defined by the hypotube, forming an inner catheter assembly.
