Auditory evoked potentials in premature and full-term infants |
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| Authors: | Maria Angélica de Almeida Porto Marisa Frasson de Azevedo Daniela Gil |
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| Affiliation: | 1. Master''s degree in human communication disorders, UNIFESP. Speech therapist of the Medical Specialty Outpatient Unit (Ambulatório Médico de Especialidades or AME) São José dos Campos;2. Doctoral degree in human communication disorders, UNIFESP. Associate professor, UNIFESP;3. Doctoral degree in human communication disorders, UNIFESP. Adjunct professor I, UNIFESP |
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| Abstract: | Accurate information about type, degree, and configuration of hearing loss are necessary for successful audiological early interventions. Auditory brainstem response with tone burst stimuli (TB ABR) and auditory steady-state response (ASSR) exams provide this information.AimTo analyze the clinical applicability of TB ABR and ASSR at 2 kHz in infants, comparing responses in full-term and premature neonates.Material and MethodThe study was cross-sectional, clinical and experimental. Subjects consisted of 17 premature infants and 19 full-term infants. TB ABR and ASSR exams at 2000 Hz were done during natural sleep.ResultsThe electrophysiological minimum response obtained with TB ABR was 32.4 dBnHL (52.4 dBSPL); the ASSR minimum was 13.8 dBHL (26.4 dBSPL). The exams required 21.1 min and 22 min, respectively. Premature and full-term infant responses showed no statistically significant differences, except for auditory steady-state response duration.ConclusionsBoth exams have clinical applicability at 2 kHz in infants, with 20 min of duration, on average. In general, there are no differences between premature and full-term individuals. |
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| Keywords: | evoked potentials auditory audiometry evoked response hearing infant |
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