I knew a lady with Alzheimer's who, one evening, fell and broke her wrist, badly. Luckily she had a life alert system and she was whisked away to the hospital and needed emergency surgery.
Now, dementia is a terrible thing, and one that can be exasperated by things like infection, injury, and pain. There's also a sort of stubbornness you get in dementia that, for example, makes them power through eating things like Tide pods and paint, because they think it's something that's supposed to be eaten.
So this lady gets home from the hospital. Her family's there, puts her to bed in the evening, and make sure she has her alert necklace. Just in case she falls again.
In the night, it goes off. The firefighters get sent, just in case, and find her on the floor in a pool of blood.
She had, in her stubborn and confused state, ripped off her cast.
And the stitches.
And the pins and rods.
Anyway, the hospital refused to release her home unless she had carers. She healed up pretty well, but moved on to scratching her leg raw and eating bullion cubes.