Petey, you can infiltrate a buttonhole, though it is not nearly as difficult. If it happens, the same needs to be done about it. Read the above trail.
Also...the self cannulating thing. Umm-not a fan of thinking about this now. I have been a diabetic for 26 years and have no problems sticking myself with a needle for that...but that is differeent! I am sure that when my fistula heals and I get used to all thiss it won't be so "different". This is my new life...
Is it "in a loop" or kind of staight, a little squigly? If there is a true "loop", it's a graft. The staff at the clinic can tell by looking at it. Sounds like a graft, porbably Bovine.