Hearing screening in neonates with hyperbilirubinemia.

BACKGROUND

Hyperbilirubinemia is toxic to the auditory pathways and to the central nervous system, leaving sequelae such as hearing loss and encephalopathy. The damage to the auditory system occurs primarily within the brainstem and cranial nerve VIII, and manifests clinically as auditory neuropathy spectrum disorder.

AIM

to establish the relationship that exists between hyperbilirubinemia at birth as a risk factor of neonatal hearing loss in children born in ABOU-EL-REISH hospital.

MATERIALS AND METHODS

we carried out of 60 neonates categorized into two groups: Group (A n = 30), neonates with hyperbilirubinemia; Group (B n = 30), neonates without hyperbilirubinemia.

RESULTS

Ten neonates were boys and twenty were girls from group A and eleven boys and nigh-teen girls from group B.There was significant statistical difference between group A and group B regarding ABR (P-value = 0.001) and a statistical difference regarding OAE (P-value = 0.103 in the right ear and 0.028 in the left ear). Also, our study shows the area under the curve and the diagnostic accuracy of total serum bilirubin (TSB) level for detection of hearing screening results (ABR) at a cut-off point 21 mg/dl (P-value = 0.008 and 0.009 in the right and left ears respectively.) CONCLUSIONS: Our study showed a relevant association between bilirubin levels and abnormal hearing screening results and the importance of combined screening with OAE and ABR tests.