Scoring Balloon and High Pressure Balloon in the Treatment of Arteriovenous Graft Stenosis

Exclusion Criteria

• •1. The target lesion is located in the feeding artery, arterial anastomosis, artificial blood vessel puncture site, cephalic venous arch, thoracic outlet or central vein;
• •2. A stent has been implanted in any part of the access or there is ipsilateral central vein stenosis or occlusion that affects the function of the access;
• •3. Severely calcified lesions that are not expected to be dilatable with balloons;
• •4. Acute thrombosis or chronic total occlusion of AVG occurred at the time of enrolment;
• •5. The target lesion or any part of the vascular access has received PTA treatment within the last month;
• •6. There are thicker branch veins in the vein opening of the end-to-side anastomosis;
• •7. Patients who have undergone major surgical treatment within 30 days before inclusion in the study;
• •8. Patients known to be allergic to or intolerant to contrast media;
• •9. Patients receiving glucocorticoids or immunosuppressants;
• •10. The patient's life expectancy is less than 1 year;
• •11. Patients planning kidney transplantation or switching to peritoneal dialysis;
• •12. The degree of stenosis in the puncture point area is \>50%；
• •13. Patients with infection or other medical conditions that make the investigator think they are not suitable to participate in this study;
• •14. Those who have participated in clinical trials of other drugs or devices but have not completed them.