Clinical Research Directory

Inclusion Criteria: * Patient must be 18 years of age or older at the time of signing and dating informed consent (no upper age limit), can be male or female. * Patient must have a vascular access for hemodialysis (type: brachial-cephalic autogeneous fistula or brachial-axillary prosthetic graft) * Patient must have a dysfunction of its vascular access, defined by : * dialysis sessions last \>4 hours * and/or access flow \< 400ml/min for fistulae and \<600ml for grafts, or 20% decrease in access flow as monitored during dialysis or by Duplex ultrasound scan, * and/or dialysis recirculation * and/or thrill not perceived * and/or pulsatile vascular access * and/or bleeding or increased bleeding time after puncture * A stenosis \>50% of the venous line must be diagnosed on the initial fistulogram * A successful plain balloon angioplasty of the stenosis, defined by residual stenosis \<30% on control angiogram, without dissection or indication for use of stent or additional surgical procedure, must be completed before inclusion. Exclusion Criteria: * Pregnant or nursing woman, or plans to become pregnant during the study. * Patient has hyperkalemia \>6,5 mmol/L with EKG modifications or acute cardiac insufficiency at the time of inclusion * Vascular access has in-stent restenosis * Initial fistulogram shows no stenosis * Initial fistulogram shows indication for open surgical intervention * Control fistulogram (after plain balloon angioplasty) shows indication for stenting or open surgical intervention