Abstract: An oropharyngeal airway configured for placement within a mouth of a patient to create a passageway between a mouth of a patient and the posterior pharyngeal wall that includes a passageway body, a flange assembly and a reactive material. The flange assembly is positioned at the end of the body and includes spaced apart upper and lower flange portions, which define a passageway therebetween which is in communication with the opening of the passageway body. The reactive material cooperates with the flange assembly and the passageway defined by the spaced apart flange portions. The reactive material provides qualitative visual indication as to whether the patient is effectively ventilating. A nasopharyngeal airway is likewise disclosed, as is a flange assembly which can be coupled to existing airways.