title: Tympanometry in acute otitis media: prognostic implications.
abstract: Impedance tympanometry was performed on children with acute otitis media. Most acute tympanograms were classified as either type B (no peak pressure) or positive-pressure tympanograms. A striking difference in outcome was noted between these two groups: the patients with positive-pressure tympanograms were more likely to have normal results with examination at the two-week follow-up than were those with type B tympanograms. There was no difference in outcome between antihistamine-decongestant and placebo regimens evaluated concurrently.
mesh_terms: D000158:Acoustic Impedance Tests; D001274:Atmospheric Pressure; D002648:Child; D005500:Follow-Up Studies; D006634:Histamine H1 Antagonists / Q000627:therapeutic use; D006801:Humans; D007223:Infant; D010033:Otitis Media / Q000175:diagnosis*; D010035:Otitis Media, Suppurative / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology; D010919:Placebos; D011379:Prognosis
chemical_list: D006634:Histamine H1 Antagonists; D010919:Placebos