Unfortunately, i have lived this nightmare. My only daughter was hit by a hit and run. She was in a similar state for two months but with no machinery hooked up. As nothing happens without a reason, a couple of years before she had worked in a hospital setting where they had children that had never woken for different health reasons. She told me that if she was ever in the same situation that she did not want to be left that way. Luckily i did not have to make the decision. She died after two months on her own. I think prolonging the death is for the family and not the patient. May this little girl rest in peace.