Issues in early identification of hearing loss

Area of Science:

• Neonatal care
• Audiology
• Pediatric medicine

Background:

• Neonatal hearing loss is a significant concern.
• Early detection is crucial for intervention and developmental outcomes.
• Existing screening methods may not identify all at-risk infants.

Purpose of the Study:

• To evaluate an early detection research program for neonatal hearing loss.
• To assess the effectiveness of brain stem electric response audiometry (BERA) in identifying at-risk neonates.
• To compare BERA outcomes at discharge versus four months of age.

Main Methods:

• A high-risk register and BERA with click and frequency-specific stimuli were used.
• 631 at-risk neonates from general and intensive care nurseries were tested.
• BERA was performed before discharge and again at four months.

Main Results:

• Significant discrepancies were observed between initial and follow-up BERA tests.
• 51 neonates were identified with mild to severe hearing loss from the four-month follow-up.
• Frequency-specific BERA detected cases missed by click stimuli alone.

Conclusions:

• Comprehensive neonatal hearing evaluation is justified despite resource demands.
• Deferring BERA testing to four months is a feasible and desirable strategy.
• Risk factor criteria influence case load and detection yield; frequency-specific BERA is essential.