Jon, It's sounds like you getting on the right track.(.no pun intended) I have this alderly lady that she just had the same think, however Julie (the olderly patient) is so fragile that they won't start her fustula until it develops more than three weeks. She(Julie) is not happy. She's been on dialysis using here graft for more than 10 years..She is some survior and she's 80years old.
Good luck!
Rivy
EDITED:Fixed smiley tag errors-kitkatz,Moderator