Correlation between sensation of nasal obstruction and geometric evaluation by acoustic rhinometry.

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We evaluated the correlations between the geometric parameters obtained by acoustic rhinometry (AR) and the sensation of nasal obstruction assessed by Visual Analogue Scale (VAS). Fifty-nine patients (35 males, 24 females) with nasal disease, complaints of stuffy nose, and sixty-seven normal subjects (54 males, 13 females) were selected for this study.VAS was recorded according to sensation of nasal obstruction at the time AR was measured. An acoustic rhinometry (GM instrument) was used, and each subject were measured in a quiet sitting position.With regards to the results by AR, no significant difference was seen between the two groups. The results obtained by VAS correlated poorly with the geometric data obtained by AR. However, when the values of VAS were classified in three categories according to severity (mild, moderate, severe), rough correlations between the date by AR and these categories were demonstrated. This tendency was more obvious in single nasal airway breathing than in two nasal airway breathing. In sensation of nasal obstruction, this study revealed that most cases (40/59 cases) felt a difference between each nasal airway. Therefore, to diagnose the sensation of nasal obstruction by AR, evaluation of each nasal cavity separately should be carried out.
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