Ultrasonic angioplasty-atherectomy catheter and method of use

摘要

An ultrasonic device and method for removing obstructive matter from an anatomical structure or passageway (e.g., blood vessel). The device comprises an elongate pliable catheter having a distal tip member attached to the distal end thereof, and an ultrasound transmission member which extends longitudinally therethrough to carry ultrasound from the proximal end of the catheter to the distal tip member. The distal tip member has a concave indentation formed in the distal surface thereof, and at least one inlet passageway extending therethrough in communication with a catheter lumen to facilitate suctioning of severed matter which becomes located within the concave indentation of the distal tip. The device may further incorporate means for infusing fluid (e.g., irrigation fluid, medicaments) separately or concurrently with the aspiration of the severed obstructive matter.