Hearing Screening of Newborns and Infants by Otoacoustic Emission

Abstract

Introduction: This study was undertaken to assess the hearing of newborns and infants using otoacoustic emission as a screening tool. Screening of hearing impairment in infants is done before the third month of life, and intervention, if any, required by the age of 6 months is of prime importance. The aim of this study was to screen 215 newborns for hearing.
Materials and Methods: About 215 neonates and infants were included after a thorough ENT examination and history taking. Two stage DPOAE was done on the newborns with 2, 3, 4, and 6 kHz frequencies in both ears. Newborns who failed the first OAE in any ear were tested for a second OAE in both ears within 15 days to 3 months.
Result: Out of 215 cases, 10.2% (n = 22) babies had referred results for 1st DPOAE in which low birth weight, prematurity, respiratory distress syndrome, post-natal sepsis, and maternal anemia and pregnancy-induced hypertension were among the identified infantile and maternal risk factors respectively. For these infants, repeated DPOAE screening was done. On repeat DPOAE testing, all babies passed the DPOAE 2nd test.
Conclusion: This study was an attempt to show the importance of developing a hearing screen with DPOAE when repeated appropriately. The hearing of all infants should be screened at no later than one month of age; those that do not pass screening should have a comprehensive audiological evaluation at no later than three months of age, and infants with confirmed hearing loss should receive appropriate intervention by six months of age.