Intra-luminal ultrasonic instrument

摘要

The intra-luminal ultrasonic instrument includes a catheter comprising a body, a flexible rotatable drive shaft within the body, an opalescent tip coupled to the flexible rotatable drive shaft having a distal end and a distal end portion adapted to be introduced into a lumen and a proximal portion, and a transducer mounted in the tip for rotation at a selected rpm, the catheter having a diameter no greater than 3 millimeters, the flexible rotatable drive shaft having a central longitudinal channel containing coaxial cable cooperative with conductors to connect the transducer to a source of energy for energizing the transducer to produce and supply sound waves, and the transducer having a top surface comprising a matching layer of a conductive polymer set upon a piezo plate.