Patent ID: 7727178

Claim:
A catheter system for delivering ultrasonic energy and a therapeutic compound to a treatment site within a body lumen, the catheter comprising: a tubular body having a proximal end, a distal end and an energy delivery section positioned between the proximal end and the distal end; a fluid delivery lumen extending at least partially through the tubular body and having at least one outlet in the energy delivery section; and an inner core configured for insertion into the tubular body, the inner core comprising: an elongate electrical conductor having a plurality of flattened regions, each flattened region having a first flat side and a second flat side opposite the first flat side, and a plurality of ultrasound radiating members mounted in pairs to the flattened regions of the elongate electrical conductor, such that a first ultrasound radiating member is mounted to the first flat side of the elongate electrical conductor, and a second ultrasound radiating member is mounted to the second flat side of the elongate electrical conductor; and wiring such that a voltage can be applied from the elongate electrical conductor across the first and second ultrasound radiating members such that the first and second ultrasound radiating members can be driven simultaneously.