Abstract: Objective To investigate the long-term prognosis of stent implantation for arteriovenous graft (AVG) outflow stenosis.  Methods  Patients with AVG outflow stenosis and received stent implantation from January 2016 to December 2021 in Jinshan Hemodialysis Access Center, the First Affiliated Hospital of Chongqing Medical University were enrolled in this study. General information were collected, postoperative patency was followed up, and the influence factors for postoperative patency were analyzed.  Results  A total of 71 patients were included with (732.15±428.29) days after AVG creation and (4.17±2.52) times of percutaneous transluminal angioplasty (PTA) before stent implantation. Stent implantation was performed for recurrent stenosis within 3 months after PTA in 59.15% of the patients. The primary patency rates were 84.51%, 63.38%, 39.62% and 24.14%, and the secondary patency rates were 100%, 98.59%, 98.04% and 89.66% after stent implantation for 6 months, 12 months, 24 months and 36 months, respectively. The mean re-intervention times after the first stenting were 0.46, 0.83 and 1.31 times in the first year, second year and third year, respectively. The median re-intervention time was 9.80 months after stenting (0.33～41.53 months, calculated only the cases with re-intervention events during follow-up). Thirty cases developed in-stent edge stenosis, 18 cases developed de novo stenosis at two ends of stent, and 2 cases had AVG thrombosis without stenosis and probably caused by other factors.  Conclusion  Stent implantation is an effective management for AVG outflow stenosis. There are many factors affecting AVG patency, and new stenosis lesions may be induced by stenting itself. Therefore, stenting operation needs to be judged individually.

Key words: Arteriovenous graft, Stent, Patency rate