Final answer:
The paramedic should follow the 'CAB' sequence: Airway, Breathing, and Circulation, to assess a patient for immediate life threats, with Airway being the first priority followed by Breathing, and then Circulation.
Step-by-step explanation:
The paramedic should assess for immediate threats to a patient's life in the order of Airway, Breathing, and Circulation, according to the widely accepted medical approach. This prioritization stems from the fact that a clear airway is necessary for effective breathing, and breathing is essential for sustaining the body's circulation and oxygenation.
Because respiratory system protection is vital and the airway forms the first part of this system, ensuring an open airway is a critical first step in many medical emergencies. Once the airway is secure, the paramedic will assess breathing to verify that adequate gas exchange is occurring. Lastly, circulation is checked to ensure that blood is being delivered efficiently to the tissues, particularly the brain.
In cases where CPR (Cardiopulmonary Resuscitation) is needed, such as when a patient's heart stops, high-quality chest compressions are performed to maintain blood flow, particularly to the brain, where irreversible damage can occur within minutes. The acronym 'CAB' reflects the order of Airway, Breathing, and Circulation, and is endorsed in life support protocols. The correct answer to the initial question is therefore Option 1: Airway, Breathing, Circulation.