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Brainstem auditory evoked response in neonates with birth asphyxia

P K Misra1, C P Katiyar, R K Kapoor

  • 1Department of Pediatrics, King George's Medical College, Lucknow.

Indian Pediatrics
|March 1, 1997
PubMed
Summary

Brainstem auditory evoked response (BAER) abnormalities in neonates with birth asphyxia are transient and typically resolve by 3 months. These findings suggest BAER may not be a reliable tool for early detection of neurological handicaps in these infants.

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Area of Science:

  • Neonatal neurology
  • Auditory neurophysiology

Background:

  • Birth asphyxia can lead to hypoxic-ischemic encephalopathy (HIE) in neonates.
  • Brainstem auditory evoked response (BAER) is used to assess auditory pathway function.

Purpose of the Study:

  • To investigate BAER abnormalities in neonates with birth asphyxia.
  • To evaluate the reversibility of these BAER abnormalities.

Main Methods:

  • Prospective case-control study involving 30 neonates with birth asphyxia (5-min Apgar < 6, HIE) and 30 controls.
  • BAER testing was performed, with follow-up at 3 months.
  • Association with HIE stages and neurological abnormality duration was analyzed.

Main Results:

  • 43.3% of neonates with birth asphyxia exhibited BAER abnormalities, primarily transient prolongation of wave latencies and interside latency differences.

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  • Abnormalities correlated with HIE stage and prolonged neurological deficits (>5 days).
  • All observed BAER abnormalities normalized by 3 months; BAER did not predict later developmental screening results.

    • Conclusions:

    • BAER abnormalities in neonates following birth asphyxia are transient and resolve by 3 months.
    • BAER appears to have limited utility for the early identification of long-term neurological deficits in this population.