The present invention relates to an ultrasound catheter for disrupting occlusions in blood vessels, the ultrasonic catheter comprising: an elongate flexible catheter body having a proximal end, a distal end and at least one lumen； an ultrasound transmission member extending longitudinally through the lumen of the catheter body； a sonic connector coupled with a proximal end of the ultrasound transmission member for coupling the ultrasound transmission member with a separate ultrasound generating device； and at least one heat absorbing member coupled with the ultrasound transmission member adjacent the sonic connector.
