Effective Use of Oropharyngeal and Nasopharyngeal Airways Oropharyngeal and nasopharyngeal airways are adjuncts that can be used to obtain/maintain an open airway. An oropharyngeal airway (OPA) is also known as an oral airway or Guedel pattern airway or simply Guedel airway (named after the original designer Arthur Guedel).2ย The nasopharyngeal airway (NPA) is also called a nasal airway, NPAT (nasopharyngeal airway tube), or […]