Mom is 86 in a nursing facility with dementia, diabetes, chf, copd, and renal failure. 4 days ago she went to bed and has not been up since. She has not eaten and only takes sips of water. We have had to up her oxygen to 5 liters on the concentrater and still can't keep her Sats above 90. She sleeps most of the time, talking jibberish in her sleep, reaching out for things that aren't there. She became totally incontinent. She is on hospice has been for 4 months. The hospice nurse says watch and see an just keep her comfortable. Is this the end? How long can it go on?