Rhinomanometry is a standard diagnostic tool aiming to objectively evaluate the respiratory function of the nose.
Unilateral measurements are performed to detect any asymmetry or abnormality in nasal airway resistance.
If there is no significant improvement after decongestant, anatomical abnormality, like deformity of cartilage or bone within nasal cavity is suspected.
However, it should be stressed that controlled ambient temperature and humidity, tight seal of the facial mask, contralateral nostril closure and prevention of mouth breathing are essential for reproducible results.
Posterior rhinomanometry should be done by more experienced technicians and very good collaboration of the patient is essential.