I was thinking that the estimates I've seen were that thirst kills you in around a week depending on your ambient conditions and physical exertion; being in a hospital and doing little would seem to extend the expected duration before thirst kills you. Unless Kim were some sort of super-girl who could set world records for surviving weeks without any water, that strongly suggests that the food/water deprivation was what actually killed her.
Normally in a hospital, if a patient doesn't drink enough for any reason, they're hydrated via IV drip. When I was being treated for cancer, whenever I came in to be hospitalized I was connected to an IV drip - even if I wasn't medicated right away; that was standard policy for all hospitalized patients.
It seems bizarre that a hospitalized patient could suicide by not drinking without the staff being complicit. That's why I thought at first that something else must have killed her; perhaps she was already very weak from the cancer or from chemotherapy, and not eating for 11 days made her weak enough to die.
http://www.alcor.org/blog/?p=2716
Previously on LW: Aug 18, Aug 25, Aug 27, Jan 22.