Knee Surgery

My brother is going to have his left knee replace this month. I want to be at the hospital when he has it done. He isn't in the best of health and it is rather risky. They will be doing a spinal but if anything goes wrong with his breathing, they will have to put him under general anesthesia and he has emphysema and it could mean he would have to be on oxygen the rest of his life. I hope that doesn't happen.