My first fistula was done May 07, didnt work. Then I went to a different surgeon in June 07 and he did another av fistula in the same arm, then after 2 months the surgeon went in and raised it within the first two weeks it failed. In Nov 08 I went to a specialist that does av fistulas and he put one in my other arm and this one worked, two fistulagrams and fistula ballooning we are good but were having a problem infiltrating so in May 09 the really good surgeon raised my fistula and its been good, my husband puts my needles in.