Rhinometry

Acoustic rhinometry is a procedure that uses sound echoes to measure the geometry of the nasal cavity. These measurements define patency to airflow, the effectiveness of mucosal therapies and the evaluation of mucosal responses to airborne irritants.

Performing the test

1. You will sit across from a pulmonary technologist as they hold the rhinometer, a tube up to your nostril.
2. You will breathe normally while the technologist makes sure there is a good seal around your nostril.
3. They will ask you to pause breathing on the count of three.
4. After 3 or 4 seconds you will be told to breathe normally again.
5. At least 4 reproducible efforts will be done for each nostril.
6. You may be given a nasal spray or exposed to an irritant and asked to repeat the test.