![]() The 226 Hz probe-tone tympanograms of middle ears with fluid differed greatly from those without. We recorded the tympanograms and their percentage of every type and compared the tympanometric results with CT to get the concordance rate between tympanometry and CT diagnose while obtaining the normal values of 1000 Hz tympanometric measures. The patients were divided into 2 groups according to the results of the CT scan: group 1 patients had normal middle ears without fluid, and group 2 patients had ears with fluid. After a spiral computerized tomography (CT) scan of the patients, we tested their hearing using tympanometry of 2 probe-tone frequencies: 2 Hz. This study was carried out to evaluate the diagnostic value of 2 Hz probe-tone tympanometry in infants with effusion in the middle ear.įor this study, we recruited 52 infants with ages 42 days to 6 months as clinical subjects in a hearing-ability screening program.
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