Take a deep breath, stop being an arse to your wife, and relax.
It will become clearer over the next 24 hours or so how much damage he has sustained, and in the mean time, lay off the booze, stop panicking and be calm.
I'm an intensive care nurse and i see people in your state and in his state for a living; it's not easy, but try to stop and think rationally.
Despair is a useless emotion, so don't despair….
Wait and see how things work out, aim to provide support to your mum; however bad you feel, she's feeling a hundred times worse, but can't show it to you.
Be calm.
…and give me a shout on here if you want to talk about what you learn when info is available.