ATHERECTOMY DEVICE HAVING AN ULTRASONIC CATHETER ASSEMBLY

An atherectomy device includes a handpiece having an ultrasonic transducer, and an ultrasonic catheter assembly detachably attached to the handpiece. The ultrasonic catheter assembly includes a sheath having a proximal end, a distal end, and an elongate lumen. A core wire is located in the elongate lumen. The core wire has a distal tip and a distal portion proximal to the distal tip. The distal portion has an abrasive exterior surface portion. The abrasive exterior surface portion defines a plurality of cutting protrusions, wherein each of the plurality of cutting protrusions extends away from the core wire in a distal direction at an acute angle with respect to a longitudinal external surface of the core wire.