For a 17-year-old female who fell two meters and is unresponsive, what is the first step in treatment?

In the case of an unresponsive patient, particularly one who has experienced a significant fall such as two meters, the priority is to ensure that the airway is maintained and that oxygenation is provided. Unresponsiveness can lead to airway compromise due to the potential loss of protective airway reflexes, increasing the risk of aspiration and respiratory failure.

Oxygen should be applied immediately to facilitate adequate oxygen delivery to vital organs, which is crucial in any trauma situation. The maintenance of a patent airway must be assessed and managed effectively, which may include positioning the patient appropriately or preparing for advanced airway interventions if necessary.

While establishing IV access and assessing for hemorrhage are critical components of trauma management, they come after ensuring that the patient can breathe adequately. Administering vasopressors is typically a later step, used in the setting of confirmed hypotension and shock, and is only applicable after addressing the airway and oxygenation needs.