What immediate action is taken for 'A' in the MARCH protocol?

In the MARCH protocol, which is specifically designed for providing care to trauma patients, the first step involves addressing the "A," which stands for "Airway." Establishing a patent airway is crucial because in trauma situations, a compromised airway can lead to inadequate oxygenation and ventilation, which can quickly become life-threatening.

By ensuring the airway is clear and unobstructed, medical personnel can facilitate proper breathing and maintain oxygen flow to vital organs. This immediate action takes precedence over other interventions because if a patient cannot breathe properly, subsequent treatments will not be effective. Techniques such as head-tilt-chin-lift or jaw-thrust maneuvers may be utilized to secure the airway.

Following airway management, other steps in the MARCH protocol can be conducted, like assessing vital signs or administering fluids, but these are contingent upon the assurance that the patient is able to breathe adequately. Thus, establishing a patent airway is the correct and immediate action for "A" in the MARCH protocol.