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Background and Objectives:It is often observed that the nasal cavity becomes atrophic with old age. However, there is no exact data that prove senile atrophic changes in the nasal cavity. Thus we evaluated the efect of aging on the dimension and the resistance of the nasal cavity. Subjects and Method:One hundred twelve healthy subjects free of nasal diseases were included in this study. Acoustic rhinometry and rhinomanometry were performed before and after nasal decongestion. The subjects were classified into 6 age groups and cros-sectional area (CSA) measured by acoustic rhinometry and the total nasal resistance were analyzed by rhinomanometry among each group. Results:with age. However, there was no significant diference before and after nasal decongestion. The average values of CSA at the attachment of the inferior turbinate before and after decongestion were on the increase with age. However, the diference of CSA between pre- and post-decongestion did not change significantly with age. Rhinomanometry showed that nasal resistance markedly decreased from twenties and thirties but did not change significantly after the thirty decade. Conclusion:The dimension of nasal attributed to the structural change such as bony atrophy rather than mucosal change.

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