Cassandra, do you mean the skin is splitting and bleeding on the outside or the fistula itself is splitting and bleeding internally? Sorry to ask, but I've never heard of this.
This may be a totally stupid response as I haven't half a clue. But........I would think that the Vascular Surgeon could open the arm, tie off the souce and again tie off farther down the damaged vain, then strip out the damaged vein, closoing the arm and letting it heal.Sure the access site would be gone requiring creation elsewhere. But this should stop the swellilng and the skin spliting.Is this not an option? It seems to make sense to me, but then again, I am just a guy, a mechanic. I don't get to work on people.