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Assessment of Hearing Loss by OAE in Asphyxiated Newborns

Elaheh Amini1, Zahra Kasheh Farahani1, Mehdi Rafiee Samani1

  • 1Family Health Institute, Breastfeeding Research Center, Tehran University of Medical Sciences, Tehran, IR Iran.

Iranian Red Crescent Medical Journal
|April 11, 2014
PubMed

Insights

Severe birth asphyxia is not directly linked to hearing loss in newborns. While recommended for screening, this study found no correlation between Apgar scores and abnormal otoacoustic emissions, suggesting other factors may be more influential.

Area of Science:

  • Neonatal care
  • Audiology
  • Perinatal medicine

Background:

  • Severe birth asphyxia is a known risk factor for hearing loss, recommended for screening by the Joint Committee on Infant Hearing (JCIH).
  • Approximately 50% of newborns with hearing loss have no apparent risk factors at birth.
  • JCIH recommended universal hearing screening in 2000, particularly for high-risk infants.

Purpose of the Study:

  • To evaluate the incidence of hearing loss in neonates experiencing birth asphyxia.
  • To facilitate early diagnosis and subsequent treatment for affected newborns.

Main Methods:

  • A 3-year study (2003-2006) in Tehran, Iran, assessed the link between asphyxia and hearing impairment in 149 neonates.
  • Otoacoustic emission (OAE) testing was performed on the 3rd and 5th days of life.
  • Infants with abnormal OAE results underwent repeat testing and tympanometry with an ENT specialist.

Main Results:

  • Of 149 asphyxiated neonates, 2% (3) exhibited abnormal OAEs.
  • No statistical correlation was found between the 5th-minute Apgar score and abnormal OAE results (P=0.391).
  • A significant relationship was observed between lower mean birth weight and abnormal OAE results (P=0.0406).

Conclusions:

  • Birth asphyxia, as indicated by Apgar scores, does not appear to be significantly correlated with hearing loss in neonates.
  • Lower birth weight emerged as a potential risk factor for hearing impairment in this cohort.
  • Further research may be needed to identify specific risk factors for hearing loss in asphyxiated neonates.
Abstract

Keywords:
AsphyxiaHearing LossOtoacoustic Emissions, Spontaneous

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