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Otoacoustic emissions in full‐term newborns at risk for hearing loss
Author(s) -
Lafreniere D.,
Smurzynski J.,
Jung M.,
Leonard G.,
Kim D. O.
Publication year - 1993
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1288/00005537-199312000-00003
Subject(s) - audiology , term (time) , hearing loss , medicine , full term , pregnancy , physics , biology , quantum mechanics , genetics
Distortion product otoacoustic emissions (DPOEs) and click‐evoked otoacoustic emissions (CEOEs) characteristics of the normal newborn population have been previously reported in the literature. There is little information about DPOE evaluations in the newborn population at risk for hearing loss. The authors now report the DPOE and/or CEOE data from six full‐term subjects at risk for hearing loss or with highly suspected hearing loss. These subjects were less than 1 year of age and at risk for hearing loss secondary to a history of hereditary hearing loss, meningitis, hyperbilirubinemia, and ototoxic drug exposure. Audiometric evaluation included auditory brainstem responses (ABR), behavioral observation audiometry, and tympanometry. The CEOEs and DPOEs were found to be decreased or absent in the subjects with suspected hearing loss secondary to cochlear pathology; they were found to be normal in a subject with a suspected central hearing loss. This study's data suggest that otoacoustic emissions when combined with ABR can provide a frequency‐specific evaluation of cochlear function and help determine the anatomic site of a pathologic lesion.