List four stages of guidance of trauma long-suffering?

Settings = ER doctor/ Resident/ Intern
List four stages of management of trauma forgiving and give a brief description of respectively.
thank you. Airway--maintain patent airway next to intubation if necessary
Breathing--check Lung Sounds, be paid sure sounds are equal bilaterally--
Circulation-monitor BP, blood volume, start two large-bore IV or get internal line access
Reassesment-keep checking! Trauma patients can decompensate.
1.free the airways of any hindrance
2.make sure the human being is breathing
3.try to maintain the blood pressure any by giving medication or restricting blood loss by applying pressure to the site of bleeding etc.
4.dont let the individual fall asleep.may jump into coma