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.
On November 25, when I was riding home on my bike, I came across a loud accident. I observed that one bike had collided with another bike at great speed and either of the drivers hadn’t worn helmet!