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A multiple casualty situation in a remote area may require you to make some life-threatening decisions on treatment and evacuation of casualties. Multiple causality situations are where you need to deal with more than one person and is also referred to as a major incident. How serious the situation is, will depend on many factors not only the number of people you are dealing with like, the age of the people, level of injuries, the number of rescuers, what bystanders are available, the location, the environment and weather.

If you have to deal with multiple casualties it can be easy to approach the first person making the most noise and then miss someone who needs your help more. What you need to do is to quickly assess everyone's injuries and put them into 4 categories. This is also called triage.

There are 4 main categories, and the first is priority 1 or red group. These causalities need immediate treatment and who will be the first for the EMS to deal with or evacuate if you are in a remote location. These casualties have injuries that are life-threatening or with breathing, cardiac or circulation problems.

Priority 2 or yellow group are those who can be evacuated next. These people are those you think that you can manage until evacuation is possible. They could have serious injuries but they are stable and they are not immediately life-threatening. Keep a watch over this group in case they start getting worse, so reassess where possible.

Priority 3 or the green group are those who can be classified as walking wounded and these people may also be used to treat themselves or help treat others and then evacuated last by the EMS or they may be able to walk to safety. You would not want to waste your time with this group if there are more serious problems to deal with. They may be asking for help but you will need to be in control of the system to make sure you treat the people who need your help the most.

The final group is the dead group or white group. Unfortunately, there may be someone who you cannot help and they are not able to be resuscitated.

When the EMS arrive, they will carry out their own triage but the work you have done will help them in the hand over of the situation.