The Merit WRAPSODY AV Access Efficacy Study (WAVE)

The purpose of the study is to demonstrate the safety and efficacy of the Merit WRAPSODY Endovascular Stent Graft for treatment of stenosis or occlusion within the dialysis access outflow circuit

Inclusion Criteria: * Subject provides written informed consent * Subject is male or female, with an age ≥ 18 years at date of enrollment. * Subject is willing to undergo all follow-up assessments. * Subject has a life expectancy ≥ 12 months. * Subject is undergoing chronic hemodialysis. * Subject has either a mature AVF or AVG in the arm. * Target lesion(s) involves a de novo stenotic or non-stented restenotic lesion. * Target lesion has ≥50% stenosis. * Target lesion(s) reference vessel diameter is between 5.0 mm and 14.0 mm Exclusion Criteria: * Subject has a known or suspected infection of the hemodialysis access site, systemic infection and/or septicemia. * Subject has a stroke diagnosis within 3 months prior to enrollment. * Subject has a history of unstable angina or myocardial infarction within 60 days prior to enrollment. * Subject is pregnant, breastfeeding, or intending to become pregnant within the next year. * Target lesion is located within a stent / stent graft.