You are correct...my dad had PSP, a form of Parkinson's and was on a feeding tube, but the feeding tube was failing and they could not get another feeding tube to "take". They could have put him on intravenous feeding, but it would only have prolonged his life a month at best. He made the conscious decision not to go that route and he died two weeks later of starvation. It was very hard on our family, as once the process started, we were not allowed to give him a mere sip of water, even if he asked for it, we were only allowed to swab his mouth. I have still not fully recovered emotionally from the ordeal, not sure I ever will.