A Trail of Drug-coated Balloon Treating Below The Knee Arterial Diseases

Inclusion Criteria:

• Age 18-85 years；
• ≥70% diameter stenosis or occlusion in the target below-the-knee lesion；
• Rutherford Category 3-6；
• Subjects are willing to sign informed consent；

Exclusion Criteria:

• Planned major limb amputation within 30 days after the procedure;
• In-stent stenosis in the target lesion;
• Severely calcified target lesions；
• Creatinine>2.5mg/dL;
• History of allergies to anesthetics, contrast agents；
• Subjects who have participated in any other drug or medical device clinicalinvestigations and haven't reach the primary endpoint；
• Other circumstances judged by researchers that are not suitable for enrollment.