I agree - Research this, and try to stay cool~Your dad is probably really scared!
My dad broke his back when I was about 7 years old... I knew he was hurt really bad... And he was in Alaska when this happened. Even though I was scared, I tried to stay calm for him - So he would feel safe... And he turned out to be okay. Well, he shrunk about two inches, but hey...
Thinking positive and being there for your dad is the best medicine he could ever get!
I'm sure things will work out. ^_^