Rhinomanometry and Acoustic Rhinometry
© Blue Cross and Blue Shield of Montana
Current Effective Date:
September 24, 2013
Original Effective Date:
September 24, 2013
June 24, 2013
Rhinomanometry, acoustic rhinometry and optical rhinometry are techniques to objectively measure nasal patency. Several clinical applications are proposed including allergy testing, evaluation of obstructive sleep apnea and patient assessment prior to nasal surgery.
Nasal patency is a complex clinical issue that can involve mucosal, structural and psychological factors. The perception of nasal obstruction is subjective and does not always correlate with clinical examination of the nasal cavity, making it difficult to determine which therapy might be most likely to restore satisfactory nasal breathing. Therefore, procedures that objectively measure nasal patency have been sought. Three techniques that could potentially be useful in measuring nasal patency are as follows:
- Rhinomanometry is a test of nasal function that measures air pressure and the rate of airflow in the nasal airway during respiration. These findings are used to calculate nasal airway resistance. Rhinomanometry is intended to be an objective quantification of nasal airway patency.
- Acoustic rhinometry is a technique intended for assessment of the geometry of the nasal cavity and nasopharynx and for evaluating nasal obstruction. The technique is based on an analysis of sound waves reflected from the nasal cavities.
- Optical rhinometry uses an emitter and a detector placed at opposite sides of the nose and can detect relative changes in nasal congestion by the change in transmitted light. This technique is based on the absorption of red/near-infrared light by hemoglobin and the endonasal swelling-associated increase in local blood volume.
Ten models of rhinomanometers or acoustic rhinometers received marketing clearance by the U.S. Food and Drug Administration (FDA) 510(k) mechanism between 1984 and 2002. Optical rhinometry is a technique developed in Europe; to date, no devices had received clearance for marketing in the United States.
89.12. Experimental, investigational and unproven for all diagnoses.
Experimental, investigational and unproven for all diagnoses.
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||New 2013 BCBSMT medical policy. Rhinomanometry and acoustic rhinometry are considered experimental, investigational and unproven. |