Patent ID: 8425458

Claim:
A catheter, comprising: an elongate catheter shaft having a first lumen and a second lumen defined therein; a balloon attached to the catheter shaft, wherein the balloon has a proximal waist, the balloon being in fluid communication with the first lumen; wherein the second lumen is an injection lumen that is free of a longitudinally-extending slit; wherein the catheter shaft has a distal end; wherein a distal port is defined in the shaft adjacent to the distal end; wherein a proximal port is defined in the shaft at a position proximal of the distal end; wherein a third lumen is defined in the shaft that extends between the distal port and the proximal port; and a sleeve disposed about the catheter shaft, wherein a distal end of the sleeve is positioned proximal of the proximal waist such that the sleeve is discontinuous with the balloon, the sleeve defining an fourth lumen in fluid communication with the third lumen, the fourth lumen being defined between an outer surface of the shaft and an inner surface of the sleeve.