Subjects with stenosis or occlusion within the dialysis outflow circuit who meet the
inclusion and exclusion criteria are intended to participate in this study. The
eligibility criteria are kept to a minimum to better represent the subject profile treated
in actual clinical practice without selecting sub-groups of particular low/high risk or
excluding certain diseases or anatomies.

The goal of this observational study is to collect long-term safety and performance data for the use of the EndoForce System for connecting a hemodialysis graft to a vein in patients with End Stage Renal Disease. This is not an experimental procedure or an experimental therapy. This means that the study device has been approved by the FDA.