Patent ID: 7166098

Claim:
A method for delivering a therapeutic substance to an internal body tissue target area comprising the acts of: (a) providing a catheter having a distal end and a proximal end, and further having a delivery lumen, said delivery lumen extending from the distal end of the catheter to the proximal end of the catheter for delivery of a therapeutic substance; (b) further providing a transducer, for creating an energy, supported at the distal end of the catheter by a number of anchoring points, wherein an inner surface of the transducer is positioned at a distance from an outer surface of the catheter, the distance defining a gap between the outer surface of the catheter and the inner surface of the transducer, the gap containing a low density material for reflecting the energy from the gap towards the target area, wherein the anchoring points comprise an adhesive that seals the gap at a distal end and proximal end of the gap; (c) positioning said catheter proximate the internal body tissue target area; (d) causing a therapeutic substance to elute from the delivery lumen at the distal end of the catheter; and (e) transmitting an electrical signal to the transducer for creating the energy.