Which medical device is inserted through the nostril to help keep the airway open?

The nasopharyngeal airway is specifically designed to be inserted through the nostril and extends into the nasopharynx, helping to keep the airway open in patients who are unable to do so themselves due to obstruction or decreased consciousness. Its soft, flexible nature makes it suitable for use in patients with diminished gag reflexes as it minimizes discomfort while providing airway patency.

The oropharyngeal airway, while also intended to maintain airway patency, is inserted through the mouth rather than the nostril, making it an unsuitable choice for this question. The endotracheal tube is a more invasive device inserted into the trachea through the mouth or nose for ventilation purposes, usually in more critical situations. The tracheostomy tube is surgically placed directly into the trachea and is typically used for long-term airway management. Therefore, within the context of devices that can be inserted through the nostril, the nasopharyngeal airway is the only appropriate option.