Yes I agree with Chinmoy that it depends upon the level of injury and in case of major injury the patients should be taken to the medical care as soon as possible!!!
I think different patients are treated differently depending on their need.A person who meets with an accident is treated differently than one who suffers a heart attack.
We can do some of the things like asking the patient if he is ok or what kind of problem he or she is having. Next we have to be with the patient and have him or her sit or lie down as the situation demands and finally we should call a medical help or go to a hospital....