Your thoughts on dignified dying [View All]

Last night I watched something on TV about dignified dying. The reportage followed three families and their struggles to do the right for the person who was passing on. There was this one old lady (71) who wanted to die and not having to have a kidney dialysis every 3 days. There was no way she would get better because of it. She said "Let me go. Let me go." She didn't eat or drink anymore. The son wanted to respect her wishes and asked the doctor to stop dialysis. The doctor denied.
My question to you: When do you think it is time to let people go? How come there is this position that no matter how old the people are, how much they decided for themselves to leave this life, there HAS to be life-supporting procedure in the hospital. No matter what. Why don't we have the right to decide to die in situations like that?