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Reading: Brain-stem auditory evoked potentials in at-risk infants and follow up assessment in Sri Lanka

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Original Articles

Brain-stem auditory evoked potentials in at-risk infants and follow up assessment in Sri Lanka

Authors:

Padmini Dahanayake ,

University of Peradeniya, LK
About Padmini

Department of Physiology, Faculty of Medicine

 

Teaching Hospital, Peradeniya

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Tharaka L. Dassanayake,

University of Peradeniya, LK
About Tharaka

Department of Physiology, Faculty of Medicine

 

Teaching Hospital, Peradeniya

 

School of Psychology, University of Newcastle, UK

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Vajira S. Weerasinghe,

University of Peradeniya, LK
About Vajira
Department of Physiology, Faculty of Medicine
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Nimal Senanayake

University of Peradeniya, LK
About Nimal
Department of Medicine, Faculty of Medicine
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Abstract

Background:  The effect of various risk factors on hearing defects in infants has not been studied extensively in Sri Lanka until now.


Objectives: To determine the influence of perinatal risk factors on the brainstem auditory evoked potentials (BAEP) in infants in Sri Lanka and to assess the follow up BAEP waveforms of infants with elevated hearing thresholds after 6 months.


Method: We recorded BAEP waveforms of 100 eligible at-risk infants using auditory click stimuli. Prematurity (<37 weeks of gestation), prolonged neonatal intensive care unit (NICU) stay (>5 days), very low birth weight (VLBW) (<1.5kg), hyperbilirubinaemia, ototoxic medications, mechanical ventilation, meningitis and sepsis were the perinatal risk factors considered. Risk factors of hearing impairment (HI) were determined using multiple logistic regression modeling. We did a follow up assessment after 6 months in 26 infants with elevated hearing thresholds and compared the data of the two assessments.


Results: Prematurity (odds ratio: 3.08, 95% CI: 1.05-9.04, p=0.04) and prolonged NICU stay (odds ratio: 3.67, 95% CI: 1.00-13.49, p=0.05) were the significant risk factors for developing HI as indexed by increased BAEP threshold levels. Seventeen out of 26 infants attended the follow up study and five showed improvement.


Conclusions: Prematurity and prolonged NICU stay were the statistically significant risk factors for developing HI as indexed by increased BAEP threshold levels.


Sri Lanka Journal of Child Health, 2022; 51(3): 412-417

How to Cite: Dahanayake, P., Dassanayake, T.L., Weerasinghe, V.S. and Senanayake, N., 2022. Brain-stem auditory evoked potentials in at-risk infants and follow up assessment in Sri Lanka. Sri Lanka Journal of Child Health, 51(3), pp.412–417. DOI: http://doi.org/10.4038/sljch.v51i3.10241
Published on 05 Sep 2022.
Peer Reviewed

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