A rapid exchange catheter extends from a proximal portion which remains outside
of a patient's body during use to a distal portion which, during use, is located
within a body lumen adjacent to a target area to be treated, wherein the proximal
and distal portions are coupled by a medial portion. The catheter comprises a guide
wire lumen extending longitudinally through the distal portion and a guide wire
receiving channel formed by an outer surface of the medial portion, wherein the
guide wire lumen is open to a distal end of the channel.