As a first responder, you are welcome to make medical decisions based on the injury but you also must promote the learning of first aid. First aid is given to prevent any further aggravation of an injury for the injured. Here are the 4Ps of first aid.
Yesterday, I was travelling to Mahabalipuram. Halfway through the drive, I saw a huge crowd on the side of the road. I stopped the vehicle, jumped out, and rushed there to see what had happened.
Today near Vadapalani I came across an accident. Looked like it had happened about 10 minutes before my arrival. I checked for scene safety and went to the spot.