Petey,
It was nothing personal when I said it had never been said to me that the tube needs to be changed at any intervals. If I'm going to keep it in for three years, such as James did, then I would suspect it needs to be changed. Most of us don't have the tube for that amount of time, usually well under a year after treatments end so no need for the changes.
If one of your doctors said that to you, wonderful, he must have his reasons for saying it. What I stated is that I never had it changed and I was never told it needed to be changed. I stand by what I said.
Minnie