In my experience, I think its the tech. I was like you, I had the same tech for two of the three sessions, but when I had a different tech I always alarmed, or cramped or the light on my machine ran yellow instead of green. I had my 1st cath placed in May of 2010 and one of the nurses said after a few months it needed to be replaced because I wasn't getting good cleaning, but my tech put in activasce and it started working but did give me problems here and there.When I had my 2nd try for a fistula they decided to replace it, which was just done, so I went almost 9 months with my first cath. See if they can try activace and see it that helps.
My permacaths didnt last long, they would use tpa to clean out my cath but eventually that wouldnt work. Av fistula is the way to go for best clearance, do u have a living donor if not I would really think about it. And why cant u go to the place u perfer to do ur surgeries.
Plus they are shunting me to the access center that is owned by the dialysis center instead of the hospital where I normally receive all of my medical care. I think they want me to get a fistula and make their lives easier but I refuse.