my sister is in the hospital...they said she has no blood platelets...she is in her 70s...what does this mean...they also said she is not expiring carbon monoxide...what is going on...three days since they started testing her and no word on test results...she was also falling asleep even when she was just sitting at the table during the day...please let us know...her family is in IA and she and her husband are in WA state.