Ive had fistula's on and off for 20 years or so. When I was younger I would be put on flagyl and do sitz baths in about
2 weeks it was gone. This happened a couple times I did the same thing then it left and didnt come back for about
10 years. Then all of a sudden it came back with a vengeance. I had to go to the hospital and have it drained and it was really deep. It took about
a year and a half to heal. (Cause it heals from the inside out.) very, very painful. Thats been going on for about
8years. I was on flagyl , then a new primary boost it up 500 mg. more Circulation, numbing and tingling and shooting pains started happening so I had to go back down on it. The shooting pains in my feet left but the tingling stayed. Eventually it lead to my hands so I was put on Humira and stopped Flagyl. Its been a little over a year and this last month it has not come back. I never had the septon procedure done I did'nt know about
it until now. So Im sorry i cant comment on that. I dont know if this helps any but i guess i would suggest ramicaid or humira before i would do any surgery. Much luck to your father.