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  • Title: Acoustic reflectometry for assessment of hearing loss in children with middle ear effusion.
    Author: Teele DW, Stewart IA, Teele JH, Smith DK, Tregonning SJ.
    Journal: Pediatr Infect Dis J; 1990 Dec; 9(12):870-2. PubMed ID: 2277742.
    Abstract:
    We sought associations between acoustic reflectometry and hearing loss in ears with and without middle ear effusion in 137 New Zealand children ages 3 to 16 years. Reflectometry was significantly associated with conductive hearing loss. These associations were present in the entire sample; correlation coefficients varied between 0.31 at 2000 Hz (P less than 0.001) and 0.55 for a three frequency pure tone average (P less than 0.001). The associations persisted for the sample of ears deemed to be filled entirely by effusion; correlation coefficients varied between 0.27 at 4000 Hz (P = 0.026) and 0.47 at 500 Hz (P less than 0.001). Using a reflectivity of 6.0 or greater to detect a three frequency pure tone average loss of 30 dB or more, the sensitivity was 88% and the specificity was 44%. The technique of acoustic reflectometry should be explored and extended to permit rational decisions about management of middle ear effusions.
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