Patent ID: 6723063
Filing Date: 2004-04-20
Classification: A61B,A61M

Abstract:
A catheter configured for treatment of an occluded section of a patient's vascular system using a drug solution, the catheter comprising:(a) an elongate main catheter body adapted for treatment of the occluded section, the elongate main catheter body having a catheter body wall with all outer surface and an inner surface forming an inner lumen, the catheter body wall comprising a first material, a proximal end, and a distal end having an energy delivery section, the energy delivery section comprising a second material having an ultrasonic absorption that is lower than the first material; (b) at least one drug delivery lumen formed integral with the elongate main catheter body, the drug delivery lumen having a drug delivery lumen proximal section, a drug delivery lumen distal section, and at least one drug delivery port formed in the drug delivery lumen, the drug delivery port located within the energy delivery section and adapted to deliver the drug solution to the occluded section of the patient's vasculature; (c) an elongate ultrasonic core sized and configured to be removably inserted into the elongate main catheter body inner lumen, the elongate ultrasonic core having an outer wall, a ultrasonic core distal section, and at least one ultrasonic transducer positioned within the ultrasonic core, distal section, the ultrasonic core having a length sufficient to position the transducer in the energy delivery section; (d) a cooling fluid passageway formed between the outer wall of the ultrasonic core and the inner surface of the elongate main catheter body wall, the cooling fluid passageway having a cooling fluid passageway proximal section, and a cooling fluid passageway distal section, wherein the cooling fluid passageway surrounds the transducer in the energy delivery section; and (e) a stop element for axially registering the ultrasonic core in the elongate main catheter body inner lumen such that the transducer is positioned in the energy delivery section.