Which of these initial care steps should be included for a patient who drank a bottle of floor cleaner and is unconscious?

In the case of a patient who has consumed a toxic substance like floor cleaner and is unconscious, ensuring a patent airway is the top priority. Inserting a nasal airway can be an important step in this scenario because the patient may have a compromised airway due to loss of consciousness. This intervention helps keep the airway open, which is critical for effective ventilation and preventing airway obstruction.

Other interventions, while significant in specific contexts, may not address the immediate need for airway management as effectively. For instance, applying high-flow oxygen via a nonrebreather mask could help with oxygenation but does not resolve airway blockage. Similarly, suctioning the airway can be crucial if there are secretions obstructing it, but simply suctioning without ensuring a stable airway could be insufficient. Contacting poison control is an essential part of the management plan, but it would not provide immediate support in maintaining the airway during an emergency. Thus, the correct initial care step focuses on ensuring that the airway remains clear and accessible.