Ekos (Bothell, Washington) reported that the FDA has cleared its EkoSonic Endovascular System for the ultrasound facilitated, controlled and selective infusion of physician-specified fluids, including thrombolytics, into the vasculature for the treatment of pulmonary embolism (PE). Ekos said its ultrasonic devices are designed to "gently accelerate" the penetration of thrombolytic agents into thrombus, providing high levels of lysis.