Características das emissões otoacústicas por transientes em programa de triagem auditiva neonatal

Abstract

Results: reference tables were calculated for the over all OAE levels and for frequency bands, according to gender and ear. The duration of the exam in the nursery was shorter than in the clinic. Conclusion: The level of the OAE was influenced by gender and ear, except for 0,7kHz. However, there were no observed differences between neonates without and with auditory risk.

Simetria das medidas timpanométricas e as respostas das emissões otoacústicas transientes em neonatos

“…There was a general trend for the right ear response to be greater. This "advantage" relative to the left ear has also been observed in other studies 7,20 . It has been argued that the difference in TEOAE records between the ears is associated with the right ear having a slight advantage in aural sensitivity.…”

“…In the central auditory nervous system, the left hemisphere is dominant for language skills. Regarding the peripheral auditory system, there is also evidence that TEOAE responses are stronger in the right ear 7,18 . Given that middle ear conditions interfere with TEOAE responses and that an asymmetry in tympanometry could indicate a difference in this structure, the study of symmetry in tympanometric measurements, even within normal limits, will assist in understanding whether this fact is related to failures or differences in the otoacoustic emission records between the ears.…”

“…It has been argued that the difference in TEOAE records between the ears is associated with the right ear having a slight advantage in aural sensitivity. This advantage could be a factor favoring left hemispheric dominance for language 7 , suggesting that the cochlear portion of the peripheral auditory system may also play an important role in the right ear advantage that is observed when evaluating the auditory processing of speech sounds.…”

“…The size of the external auditory canal is also an aspect to be considered, given that responses of greater amplitude are observed in neonates because the volume of the canal is small 7,[9][10][11][12][13] . Acoustic immittance measurements are used to evaluate the general condition of the middle ear.…”

“…Thus, this method is an excellent tool for detecting moderate to severe cochlear hearing loss [5][6][7][8] . males, and the infants exhibited no risk factors for hearing loss according to the Joint Committee on Infant Hearing criteria 19 .…”