The First Aider must first reduce to a minimum any danger to the casualty or to himself (take care to avoid becoming a second casualty), e.g. in the case of:
fire and collapsing buildings: move the casualty to
safety;
road accidents: instruct someone to control the [...]
So, what are the main things that we must know in case of a real emergency? Well, firs of all, the first aider must be prepared to take responsibility. This includes:
an appreciation of the situation;
diagnosis;
treatment and disposal;
taking charge until someone more experienced is available.
Where there is more than one casualty (the case of multiple casualties), [...]