Sleep comes first
We can’t imagine how lazy and inconsiderate you have to be to ignore your spouse when she’s experiencing a health crisis. In this case, the OP’s mother’s blood sugar had spiked to over 500 and needed emergency care. Her husband, who was fast asleep, wouldn’t even get out of bed to take her to the hospital.
What was he expecting would happen next? That his wife’s diabetic attack would suddenly go away on its own? If your husband of however many decades doesn’t put sleep over your well-being, maybe it’s time to pack his things up and kick him out.