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Tympanograms were done on 120 patients with adenoid hyperplasia, chronic sinusitis and chronic tonsillitis to measure the middle-ear pressure as a parameter to eustachian tube function. The results were compared with those obtained in 50 normal subjects. The statistical significance of the mean values of middle-ear pressure is very highly significant in patients with adenoid hyperplasia, significant in chronic sinusitis group and insignificant in patients with chronic tonsillitis, as compared to the normal control group. Hence, eustachian tube dysfunction is maximum in patients with obstructing adenoids, less in chronic sinusitis and least in chronic tonsillitis.
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Alhady et al. (1984) studied this question.
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