Thanks again everyone. I'm a total wreck but am doing the best I can. I always think the worst.
Max is not having general anesthesia. He's going to have dexdomitor/torb injection (copied from my paperwork). The doctor called it twilight anesthesia and believes Max will do fine. He says its less invasive.
I feels so badly for him. Max hates the car because he fears we are going to the vet (even though we always go to the dog park too). He walks in with his tail between his legs, rolls over in submission and pees

Everyone always says how sweet and docile is. He's such a good boy. I hope this ends quickly and painlessly for him. Poor dog has been through enough testing in his life.