The InterGraft Vascular Venous Anastomotic Connector (VIG) was developed for minimally invasive anastomosis (connection) of a vein to a standard, currently sold synthetic graft for hemodialysis. The VIG is designed with a nitinol (metal) frame that is covered with a plastic material called expanded polytetrafluoroethylene, or ePTFE. The ‘vein end' of the VIG is placed within the vein using a special catheter delivery system that is inserted into the vein through a small needle puncture. The ‘graft end' of the VIG is fitted into the graft that is placed under the skin using standard methods. The purpose of this research study is to determine the safety and effectiveness of InterGraft Venous Anastomotic Connector for connecting a hemodialysis graft to a vein.