The order of these four Actions really depends on the scenario, but generally, scene safety is paramount. If the scene is safe, and there is life-threatening external hemorrhage, your first step could be tourniquet placement. Each scenario is different, and the ordering of these actions could vary.
There are four major areas for action:
First, you must ensure the scene is safe for you to enter. You can help others who may be working to secure the scene, or you may have to do what you can to
make the scene safe to enter (return gunfire, firefighting etc.). You can’t risk your personal safety, the risk of injury to other personnel, or the safety of your casualty.
Move the casualty to a safer area due to a real or potential threat that exists in the environment. In that case, you must quickly develop a casualty movement plan that takes into account these important considerations: the location of the nearest cover, how best to move yourself or the casualty, the weight of the casualty, and the distance to be covered.
Place one or more hasty tourniquet(s) (in a “high and tight” manner) to an arm or leg to control life-threatening external hemorrhaging. This should be accomplished in less than 1 minute. If the casualty is conscious, you may direct the casualty to render self-aid and apply a tourniquet to him/herself, if they have one.
Once you are able to reach the casualty safely and have taken any other precautions through proper communication, you must: