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Brainstem evoked response audiometry (BAER) in neonates with hyperbilirubinemia
Pramod Sharma1, N P Chhangani, Kesh Ram Meena
1Department of Pediatrics, Umaid Hospital for Women and Children, Dr. S.N. Medical College, Jodhpur, Rajasthan, India. drpramodsh@ hotmail. com
Indian Journal of Pediatrics
|June 3, 2006
Summary
Brainstem Evoked Response Audiometry (BAER) effectively assesses hearing in jaundiced newborns. This objective test detects early auditory changes linked to high bilirubin levels, aiding in the diagnosis of bilirubin encephalopathy.
Area of Science:
- Neonatal Auditory Assessment
- Neurophysiology
- Bilirubin Toxicity
Background:
- Hyperbilirubinemia, common in neonates, poses a risk of neurological damage.
- Assessing auditory function in jaundiced infants is crucial for early intervention.
- Objective hearing tests are needed to evaluate auditory pathway integrity in neonates.
Purpose of the Study:
- To evaluate Brainstem Evoked Response Audiometry (BAER) as an objective hearing assessment tool for icteric neonates.
- To correlate BAER abnormalities with serum bilirubin levels.
- To identify early signs of bilirubin encephalopathy affecting auditory pathways.
Main Methods:
- BAER recordings were performed on 30 icteric neonates.
- Testing was conducted at birth, at peak serum bilirubin levels, and during a follow-up visit (2-4 months).
- Results were compared to a control group.
Main Results:
- Prolonged mean latency of waves and interwave intervals were observed in icteric neonates compared to controls.
- Abnormal BAER records were found in 73.3% of the study group.
- Auditory abnormalities persisted in 23.3% of cases at follow-up.
Conclusions:
- BAER is a reliable and effective method for assessing auditory functions in neonates.
- BAER can detect auditory changes associated with early bilirubin toxicity.
- This technique aids in the early identification of potential hearing impairments in jaundiced infants.
