Purpose
check the feasibility of searching the minimum response of the Auditory Evoked Potential Steady State by air and bone conduction in children from birth to six months and measure the “gap” air-bone of children with impairment conductive.
Methods
we evaluated 60 children from birth to six months, 30 with and 30 without impairment conductive, divided into a control group and study group. Were measured acoustic impedance, otorhinolaryngological evaluation, and the Auditory Evoked Potential Steady State by air and bone conduction. The Auditory Evoked Potential Steady State was carried by air with insert earphones and bone with bone vibrator. By airway responses were surveyed in both ears and bone captured only the left ear.
Results
in the control group, there was a predominance of type curve “A”. In the study group, there was a predominance of type curves “B” and “C”. In otorhinolaryngological evaluation found in the control group showed up normal. In the study group, opacity and tympanic membrane retraction. The Auditory Evoked Potential Steady State in the control group by air responses were around 17.2, 26.2, 22, 7 and 19.8 dBHL at frequencies 500 to 4 kHz and bone conduction between 18.8 to 20dBHL. In the study group by airway responses were 53, 56, 50.2 and 48dBNA to 500 to 4kHz and bone of 25, 25, 20 and 20dBHL.
Conclusion
it was possible to perform the Auditory Evoked Potential Steady State by air and bone conduction in children from birth to six months of age and the “gap” air-bone was around 20dB in children with impairment conductive.
Evoked Potentials; Auditory; Auditory Perception; Early Diagnosis; Ear; Middle; Hearing
