95 year old woman with dehydration and other problems

A 94-year-old woman is admitted to your hospital with dehydration,   trouble breathing, and possible kidney failure. She is clearly in advanced Alzheimer's, weighs about 95 pounds, and shows multiple   bruises on her body. She cannot talk. Her caregiver attributes the   bruises to a blood disorder that reduces clotting. What are your   thoughts about this situation? What kind of investigation would you   conduct? What actions would you take to be in compliance with ethical principles? Please answer and add reference. Thank you.