Technical success, clinical success, primary target lesion patency, and assisted primary patency and secondary patency were defined according to the Society of Interventional Radiology guidelines for dialysis access intervention.14 (link) Technical success was defined as an adequate stent graft location and sufficient lesion coverage. Clinical success was defined as restoration of normal function of AV access and improvement in symptoms. Primary target lesion patency was defined as the time interval between stent graft deployment and the time point of the next intervention for the target lesion. Primary assisted patency was defined as the time interval from stent graft deployment to thrombosis of AV access with salvage thrombectomy, PTA, or another stent graft extension over the original stent graft edge. Secondary patency was defined as the time interval between stent graft deployment and the abandonment date of AV access.
Data were collected using Microsoft Excel (Microsoft Corp., Redmond, WA, USA). All analyses were conducted using the commercially available SPSS statistics software program for Windows, Version 22.0 (IBM Corp., Armonk, NY, USA). Patency curves over time were calculated using the Kaplan–Meier method. P values <0.05 were considered statistically significant.
Data were collected using Microsoft Excel (Microsoft Corp., Redmond, WA, USA). All analyses were conducted using the commercially available SPSS statistics software program for Windows, Version 22.0 (IBM Corp., Armonk, NY, USA). Patency curves over time were calculated using the Kaplan–Meier method. P values <0.05 were considered statistically significant.