It wasn't a case of CPR, but it was down to me to decide whether an aunt in her 80s, with quite advanced dementia, a very poor quality of life and the umpteenth UTI, who was refusing food and drink, should go to hospital for drips etc., or stay at her care home with palliative care - in other words, to die.
It was a horrible decision to have to make - I could only ask the lovely GP what he'd do if it were his much loved aunt. He said he'd leave her where she was, in familiar surroundings, where they'd keep her comfortable - especially since hospital is a terrible and confusing place for anyone with dementia, and given her history it was only going to happen again quite soon.
So she stayed, continued to refuse all food and drink - I sat with her as much as I could - and drifted away quite peacefully after about a week.
Although it was a horrible decision at the time, I felt no guilt afterwards, since I'm quite sure it's what she'd have wanted, if she'd been able to speak for herself.