| abstract |
Ultrasound catheters with lumens for fluid delivery and / or fluid drainage, and ultrasound radiating elements are used for delivery of the therapeutic compound to the target location. After the catheter is inserted into the cavity, the therapeutic compound can be delivered to the target location through selective activation of the ultrasound radiating elements. Selective activation of the ultrasound radiating elements can be used to cause fluid flow in the proximal and / or distal direction of the catheter. In addition, selective activation can be used to hold the fluid between specific ultrasonic radiating elements. |