Apparently some mistakes were mad during anathesia and the planned operation to remove her lifelong brain shunt didn’t get to that point before she stopped breathing.
Much greater detail in this article from Daily News:
http://www.nydailynews.com/news/2007/12/26/2007-12-26_kin_battle_over_daughters_life_support-2.html
Thanks for that article. Much more informative. Sounds like the mother has already written her off completely.