What is the reason why a newborn baby cannot hear clearly?

Patient's question:

The child was six days old when they went to the hospital for screening and found they couldn't hear. They were told to come back for another screening at 42 days after birth. About the previous treatment and its effectiveness: I didn't care what kind of help was offered. I just want to know if the child can be cured if they can't hear, and whether it will leave any lasting health issues.

Doctor's answer:

Neonatal middle ear effusion, retention of amniotic fluid, vernix caseosa, and fetal residual matter in the external auditory canal can lead to a decrease or disappearance of the transmitted and reflected signals of auditory brainstem response (ABR), thereby causing the ABR evoked response signals to weaken or disappear. Infants who fail the initial screening should undergo audiological and medical examinations by the age of 3 months to ensure confirmation of congenital or permanent hearing loss by 6 months, enabling timely intervention. It is recommended to seek further detailed examination at the otolaryngology department of a hospital.

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