Coma After A Brain Aneurysm My Friend Had A 9 Hr Surgery For A Brain Aneurysm And Still Hasn't Woken Up 12 Hrs Later - Is That Bad?

My friend had a 9 hr surgery for a brain aneurysm and still hasn't woken up 12 hrs later - is that bad? - coma after a brain aneurysm

Who has not woken up (currently 14 hours) - is a sign of a problem? Coma?