I have been working as a "float" tech for a couple of month and at one of the clinics i was at they had some of there AVF bfr's up to 600. i have been working for many yrs and never seen it that fast. At home clinic the fastest we run a pt is 500. Does anyone know of P@P with FMC and bfr's and if there is a web site that explains how fast you can run a bfr!! Thanks been driving myself crazy over this one!!