Abstract
Auditory brainstem responses (ABR) were recorded in 30 normal and 60 high-risk neonates with gestational age between 30 and 45 weeks. The normative data of normal group as regard to age, sex and various parameters of ABR were compared with high-risk group. ABR parameters especially wave V and interwave V-I intervals were significantly prolonged in high-risk infants. An infant was considered to “pass” the ABR test if an identifiable and replicable wave V response was present at 30 dB HL in both ears. All the normal neonates had click thresholds consistent with normal hearing. 12 of the highrisk neonates showed mild to moderate hearing impairment (absent replicable wave V at 30–60 dB HL) and 2 of them showed severe to profound hearing impairment (absent replicable wave V at 70 dB HL). 9 of the “failed” group were reevaluated within 3 months and several times thereafter if the abnormal responses persisted. 2 (3.3%) infants showed persistent hearing loss, which was confirmed later by behavioral audiometry.
Keywords: Auditory brainstem responses, Hearing screening, High-risk neonates
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References
- 1.Galambos R., Hicks G., Wilson M. The auditory brainstem response reliably predicts hearing loss in graduates of a tertiary intensive care nursery. Ear Hear. 1984;5:254–260. doi: 10.1097/00003446-198407000-00011. [DOI] [PubMed] [Google Scholar]
- 2.Hall J.W., III . Handbook of Auditory Evoked Responses. Boston, MA: Allyn & Bacon; 1992. [Google Scholar]
- 3.Halpern J., Hosford-Dunn H., Malachowski N. Four factors that accurately predict hearing loss in “high risk” neonates. Ear Hear. 1987;8:21–25. doi: 10.1097/00003446-198702000-00004. [DOI] [PubMed] [Google Scholar]
- 4.Joint Committee on Infant Hearing. ASHA. 1994;36:38–41. [PubMed] [Google Scholar]
- 5.Kileny P., Magathan M. Predictive value of ABR in infants and children with moderate to profound hearing loss. Ear Hear. 1987;8:217–221. doi: 10.1097/00003446-198708000-00005. [DOI] [PubMed] [Google Scholar]
- 6.Kramer S., Dianne R., Marie C. Auditory Brainstem Responses and Clinical Follow-up of High-risk infants. Pediatrics. 1989;83(3):385–392. [PubMed] [Google Scholar]
- 7.Lary S., Briassoulis G., Vries L., Dubowitz V. Hearing threshold in preterm and term infants by auditory brainstem response. J Pediatr. 1985;107(4):593–599. doi: 10.1016/S0022-3476(85)80030-5. [DOI] [PubMed] [Google Scholar]
- 8.McClellan M.S., Strong J.P., Vautier T., Blatt L. Otitis media in the newborn. Arch Otolaryngol. 1967;85:380. doi: 10.1001/archotol.1967.00760040382007. [DOI] [PubMed] [Google Scholar]
- 9.Shahnaz D., Charles M.S., Kimberley K.B., Ronald L.G. Neonatal screening with auditory brainstem responses: results of follow-up and risk factor evaluation. J Pediatrics. 1986;108(2):276–281. doi: 10.1016/S0022-3476(86)81004-6. [DOI] [PubMed] [Google Scholar]
- 10.Stockard JE, Kleinberg F, Westmoreland BF (1984) Prognostic value of brainstem auditory potentials in neonates. Arch Neurol [DOI] [PubMed]
- 11.Yang E.Y., Stuart A., Mencher G.T., Mencher L.S., Vincer M.J. Auditory brainstem responses to Air- and Boneconducted Clicks in the audiological assessment of At-risk infants. Ear & Hearing. 1993;14(3):175–182. doi: 10.1097/00003446-199306000-00004. [DOI] [PubMed] [Google Scholar]