What is an indication for using a nasal pharyngeal airway?

A nasal pharyngeal airway (NPA) is particularly indicated for patients who require airway support but present with trismus, which is a condition characterized by the inability to open the mouth fully. In such cases, oral intubation might be challenging or impossible due to the restricted jaw movement. An NPA can be inserted through the nostril and into the nasopharynx to help maintain an open airway without requiring mouth opening, making it a valuable tool in this situation.

The presence of a gag reflex typically suggests that a patient may not tolerate insertion of an NPA, as it could elicit vomiting or airway obstruction. Patients with facial burns may also face complications with NPA usage due to potential obstruction or discomfort, and immediate intubation is a more appropriate response for emergencies that demand rapid airway management. Thus, the scenario described in your answer aligns perfectly with the appropriate use of a nasal pharyngeal airway.