Regular Monitoring of Access Flow Compared with Monitoring of Venous Pressure Fails to Improve Graft Survival

112 patients with vascular access grafts

Monthly vascular access blood flow (Qa) surveillance plus standard surveillance (dynamic venous pressure and physical examination), with referral for angiogram if Qa <650 ml/min or a 20% decrease in Qa from baseline, and percutaneous angioplasty for stenosis >50%

Standard surveillance alone (dynamic venous pressure and physical examination)

Time to graft thrombosis and graft losshard clinical