It can be used to measure nasal anatomical landmarks, nasal septum deviation, and nasal airway changes in response to allergen provocation tests.

Adenoids can also obstruct the nasal airway enough to affect the voice without actually stopping nasal airflow altogether.

Now they march in, chest out and nostrils flaring, to demonstrate their determined machismo and catarrh-free nasal airways.

Excessive consumption of dairy products by those susceptible to mucus build-up can raise the incidence or level of snoring, as it contributes to the restriction of the nasal airways.

He described that a long term adenoid hypertrophy will cause an obstruction of the nasal airways.