Effectiveness of Adventitial Dexamethasone in Peripheral Artery Disease

This trial will examine the ability for adventitial dexamethasone to safely delay restenosis in patients at least 18 years of age, who have peripheral atherosclerotic lesions involving the superficial femoral and/or popliteal arteries. These patients have no current therapeutic alternatives beyond the procedure used to open, or revascularize, their superficial femoral and/or popliteal arteries. Metal stents have the potential to fracture when implanted in this artery segment due to continual flexion and bending of the knee. It is desirable to improve the patency of this artery after percutaneous transluminal angioplasty (PTA) and/or atherectomy-based revascularization.