Patent ID: 8617149

Claim:
A method of manufacturing a catheter, the method comprising: assembling an inner balloon within a separate outer balloon, the inner and outer balloons each being open on opposing longitudinal ends, having a central radially expandable portion, and proximal and distal reduced diameter portions on each opposing longitudinal end; placing an elongate lumen structure between an inner surface of the outer balloon proximal reduced diameter portion and an outer surface of the inner balloon proximal portion; bonding a portion of the inner surface of the outer balloon proximal reduced diameter portion, a portion of the outer surface of the inner balloon proximal reduced diameter portion, and an outer surface of the elongate lumen structure to fix the elongate lumen structure between the outer balloon proximal reduced diameter portion and the inner balloon proximal reduced diameter portion; and bonding a distal end portion of an elongate catheter shaft to a proximal portion of the bonded inner and outer balloons such that the elongate lumen structure extends from distal of proximal ends of the inner and outer balloons to proximal of the inner and outer balloons and into a lumen of the elongate catheter shaft; wherein the bonding of the portion of the inner surface of the outer balloon proximal reduced diameter portion and the portion of the outer surface of the inner balloon proximal reduced diameter portion is performed with the elongate lumen structure between the portion of the inner surface of the outer balloon proximal reduced diameter portion and the portion of the outer surface of the inner balloon proximal reduced diameter portion such that the inner surface of the outer balloon proximal reduced diameter portion, the outer surface of the inner balloon proximal reduced diameter portion, and the outer surface of the elongate lumen structure are bonded to one another; wherein after completion of the method of manufacturing the catheter, a line extending perpendicular to and passing through a central longitudinal axis of the catheter passes through, in order, a first side of a wall of the proximal reduced diameter portion of the outer balloon, a first side of a wall of the proximal reduced diameter portion of the inner balloon, a second side of the wall of the proximal reduced diameter portion of the inner balloon, a first side of a wall of the elongate lumen structure, a second side of the wall of the elongate lumen structure, and a second side of the wall of the proximal reduced diameter portion of the outer balloon.