DKutting Balloon Versus Chocolate Balloon to Treat Femoral and Popliteal Artery Stenosis

Inclusion Criteria: * 18-80 year-old male \& non-pregnant female * Patients with Arteriosclerosis Obliterans of Lower Extremities, including stenosis or osculation in femoropopliteal artery. * Rutherford clinical category-Becker class: 2 to 5 * Patients understand the purpose of the study, will voluntarily participate in the study and sign informed consent. Patients are willing to undergo clinical follow-up as required by this study. * Digital subtraction angiography (DSA) shows femoropopliteal artery stenosis above 70%, appropriate for treatment with balloon angioplasty * Reference vessel diameter from 2.5 to 7mm; Total length of lesion is less than 200mm; Total length of osculation lesion is less than 100mm * Only one target lesion needs to be Treated. Treatment of non-target lesion, if any, must be completed prior to treatment of target lesion and must be deemed a clinical angiographic success as visually assessed by the physician. The number non-target lesions are limited to maximum 3. Exclusion Criteria: * Acute or sub-acute thrombosis exist in target lesion * Severe calcified lesion (PACSS Grading 4) * Guidewire cannot cross target lesion * Amputation planned within 30 days * In-stent restenosis * Flow-limiting dissection (NHLBI grading: D-F) occurred in target lesion by pre-dilation * No other lumen-reduction devices (such as: cutting balloon, dual-wire balloon, Hawk, ELCA etc.) are treated before or after test/control group treatment. * Before test/control group tr…