Abstract
216 outpatients had 346 middle ear aspirates for either acute otitis media (#66) or insertion of pressure equalization tubes (#150). A.O. was available immediately prior to aspiration in 346 ears and both tympanometry and A.O. were available in 162 ears. The sensitivity of the A.O. was 85% with a specificity of 64% in the 346 ears aspirated. The sensitivity of tympanometry was 90% and specificity was 67% in the 162 ears for which both measurements were made. These sensitivities and specificities are not significantly different, but the specificities are better than the prediction of an experienced pediatrician using pneumatic otoscopy on the same patients.
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