الفهرس 
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Abstract
The primary physiological functions of the Eustachian tube (ET) are the ventilation of the middle ear and the balanc¬ing of the pressure of the external environment with that of the middle ear. In addition, protecting the middle ear from nasopharyngeal secretions and emptying the middle ear secretions into the nasopharynx are also among its functions. Eustachian tube dysfunction causes effusion, infection and chronic inflammation in the middle ear.
Chronic nasal obstruction is a frequent cause of Eustachian tube dysfunction which can lead to middle ear hypoventilation and suffering. Inferior turbinate hypertrophy is a very common cause of nasal obstruction in majority of cases. It may be unilateral or bilateral. Unilateral inferior turbinate enlargement is associated with septum deviation, and bilateral inferior turbinate enlargement is caused by allergic or non-allergic rhinitis. In chronic rhinitis, long-standing swelling may become irreversible.
During the duration from January, 2018 to September, 2018.our study was done on 25 patients with inferior turbinate hypertrophy who failed medical treatment and seeking for surgical management to clarify the impact of inferior turbinate hypertrophy on eustachian tube function.
According to statistical analysis of data of our study, there is strong relationship between inferior turbinate hypertrophy and eustachian tube dysfunction which was improved after partial inferior turbinectomy. We also found that tympanometry is very sensitive to ETD but many cases had symptoms and signs for ETD with type A tympanometry.
Treatment of inferior turbinate hypertrophy may improve eustachian tube function and middle ear aeration. Full history, examination and eustachian tube testing is preferred rather than depending only on tympanometry on assessment of ETF.