Distortion-Product Otoacoustic Emission of Cochlear Hair Cells in Pediatric Patients Presenting with Various Perinatal Morbidities

Abstract

Background: Hearing plays a substantial role in the growth of intellect- as well as language-related abilities in children. Congenital hearing loss leads to deficiency and defects in the growth of various abilities such as speech leading to emotional distress. The aim of our study was to detect cochlear hair cell damage in various perinatal morbidities as measured from distortion-product otoacoustic emission (DPOAE) in the pediatric age group. Materials and Methods: A 1-year prospective observational study was conducted on 65 children comprising 28 pediatric and 37 neonatal patients attending a tertiary care hospital. Results: Among 65 children, 25% of patients having perinatal risk factors failed the OAE test. The majority of neonates passed the OAE test (97.3%) as compared to the pediatric age group (60.7%). The most common risk factor associated with OAE “fail” was neonatal jaundice (100%), followed by low birth weight (35%) and respiratory distress (36%). We found no relation of “fail” OAE test with the Apgar scale (4–6). The mean signal–noise ratio (SNR) variable was highest in the frequency range of 4 and 6 kHz in neonates with statistically significant values for the frequency band of 2, 4, and 6 kHz. The above findings confirmed that the OAE recordings observed in the group of children were reliable. Conclusion: The SNR variable of DPOAE is an effective and reliable screening tool at particular frequencies. Emphasis on hearing screening using OAE should be prioritized in cases of neonatal jaundice and respiratory distress and also for patients in the age group from >1 month to 12 years.