Hi My Sister Is In The Hospital They Have Done

Hi my sister is in the hospital they have done a MRI Cat scan and a spinal tap and blood work the only thing they have found is a very very bad UTI... My sister stays in bed all day she don't eat much at all or drink unless someone is there to make her... she sleeps all day she does not know whats going on around her she talks like shes in a dream most days. Her daughter died at the age of 18 wich was 8 years ago.. I'm very worried about her any info would be appreciated