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Auditory evoked potentials in premature and full-term infants
Maria Angélica de Almeida Porto1, Marisa Frasson de Azevedo, Daniela Gil
1Medical Specialty Outpatient Unit, São José dos Campos.
Brazilian Journal of Otorhinolaryngology
|October 28, 2011
Summary
Tone burst auditory brainstem response (TB ABR) and auditory steady-state response (ASSR) are clinically applicable for infant hearing loss detection. These audiological tests show no significant differences between premature and full-term neonates.
Area of Science:
- Audiology
- Neonatal Medicine
- Neuroscience
Background:
- Accurate hearing loss assessment is crucial for early audiological interventions in infants.
- Auditory brainstem response (ABR) with tone burst stimuli (TB ABR) and auditory steady-state response (ASSR) are key diagnostic tools.
Purpose of the Study:
- To evaluate the clinical applicability of TB ABR and ASSR at 2 kHz in infants.
- To compare the responses of TB ABR and ASSR between full-term and premature neonates.
Main Methods:
- A cross-sectional, clinical, and experimental study design was employed.
- 17 premature and 19 full-term infants underwent TB ABR and ASSR testing at 2000 Hz during natural sleep.
Main Results:
- The minimum response levels were 32.4 dBnHL for TB ABR and 13.8 dBHL for ASSR.
- Both tests averaged approximately 20-22 minutes in duration.
- No statistically significant differences were found between premature and full-term infants, except for ASSR duration.
Conclusions:
- TB ABR and ASSR demonstrate clinical applicability for 2 kHz hearing assessment in infants.
- The average test duration is around 20 minutes for both methods.
- Generally, no significant differences exist in audiological responses between premature and full-term infants.
