After dismounting bike whip out my SPOT and turn it on.
Evaluate the injured rider.
1.) Severe bleeding. If there is arterial blood loss it is imperative to control immediately.
3.) Less severe bleeding and other injuries.
Depending on the extent of the injuries press the 911 button on the SPOT and make sure it is in a place where it can get a signal out. Now you can figure out other stuff like making him comfortable, preventing shock from setting in, etc.
Never had to do any of this yet, thank god. I have seen plenty of injuries, but for the most part everyone has been able to ride
I'm actually looking into one of those "Spots" Have you used it much? Ever used the 911 feature? I have been kinda looking at the one that can send messages too but man its a lot of money.