Interventional prospective, multicenter (8 dialysis units) , randomized, controlled, open study. Two strategies are compared in a parallel plan : a "valve arm " (implementation of TEGO ® valve associated with interdialytic saline locks) and a "control arm" ( standard care ). Rate of dialysis session with dysfunctions during the first six months of the study is the primary endpoint. It will be analyzed " per protocol ". The total duration of patient follow-up is 12 months.
After the first 6 months, patients in the "valve arm" retain the same type of care until the end of the study. The control patients continue to receive the usual concentrated heparin locks . The secondary endpoints of the study will be analyzed to 12 months. Training of health care teams is expected before the start of the study .
