Nasopharangeal vs Oropharangeal airway

Well when do you wanna use nasopharangeal vs Oropharangeal situation in emergency setting 

-

 Nasopharangeal airway - used in a conscious patient , as oropharageal could trigger gag reflex

-

Oropharangeal airway - used in unconscious patient as tongue can fall back and cover epiglottis

which could prevent person from breathing