The world’s first therapeutic ultrasound device for the treatment of deep vein thrombosis (DVT). The EKO-1 instrument controls the energy delivered by an array of miniature ultrasound transducers at the tip of a catheter guided into the vasculature. The EkoSonic Endovascular Device is intended for controlled and selective infusion of physician-specified fluids, including thrombolytics, into the peripheral vasculature.