Normative Values for Auditory Brainstem Responses and Wave V Thresholds in Indian Neonates and Infants.
Indian J Otolaryngol Head Neck Surg
; 74(Suppl 3): 3658-3661, 2022 Dec.
Article
en En
| MEDLINE
| ID: mdl-36742655
ABSTRACT
Click-evoked auditory-brainstem-response (ABR) is widely used for hearing screening in neonates and infants. However, their normative values are based on small studies. This retrospective study was done at a tertiary-care centre where click-ABR based screening is done in all newborns. ABR records (Nihon-Kohden machine, model MEB-9400K) of 420 healthy neonates (preterm 75; full-term 32) and infants (113) done over a period 4 years (2014-2018) were analysed retrospectively. Sick neonates and those with Wave V threshold > 40 dbnHL were excluded. Infants were divided into four groups based on post-conceptual age, Group A (75) 34-36 weeks; Group B (44) 37-40weeks; Group C (188)41 weeks-1 month; and Group D (113) 1-6months. The mean absolute latencies for wave I, wave III, and wave V varied from 1.45-1.56 milliseconds (ms), 4.14-4.37 ms, and 6.36-6.81 ms respectively. Interpeak latencies for I-V and I-III varied from 4.91 ms to 5.22 ms and 2.69 ms to 2.81 ms respectively. Older infants had lower absolute and interpeak latencies. Late preterm babies were not different from term babies suggesting early maturation of brainstem pathways.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Observational_studies
Idioma:
En
Revista:
Indian J Otolaryngol Head Neck Surg
Año:
2022
Tipo del documento:
Article
País de afiliación:
India