What do OPA and NPA stand for?

The correct answer is B, which stands for Oropharyngeal Airway and Nasopharyngeal Airway. These terms are essential in emergency medical situations for maintaining airway patency in patients who are unable to do so on their own.

An oropharyngeal airway is a device made of plastic that is inserted into the patient's mouth and extends into the oropharynx, ensuring that the airway remains open by preventing the tongue from obstructing it. It is typically used in unconscious patients who have no gag reflex.

On the other hand, a nasopharyngeal airway is a flexible tube that is inserted through the nostril and into the nasopharynx. It is suitable for both conscious and unconscious patients, as it typically does not trigger the gag reflex, making it easier to maintain airflow in some situations where the oropharyngeal airway may not be appropriate.

Understanding these devices and their proper use is crucial for EMTs, as they provide critical support in maintaining an open airway, especially in emergency scenarios.