Hearing screening of high risk newborns

Area of Science:

• Neonatal care
• Audiology
• Neuroscience

Background:

• Newborn Intensive Care Units (NICUs) care for high-risk infants requiring specialized monitoring.
• Early detection of hearing loss in infants is crucial for developmental outcomes.
• Auditory Brainstem Response (ABR) is a key electrophysiologic tool for neonatal hearing screening.

Purpose of the Study:

• To prospectively screen a high-risk infant population for hearing loss using ABR.
• To identify risk factors associated with sensorineural hearing loss in neonates.
• To evaluate the optimal timing for neonatal hearing screening.

Main Methods:

• Prospective screening of 137 high-risk infants in the NICU.
• Auditory Brainstem Response (ABR) testing using a clinical evoked potential system.
• Follow-up behavioral and audiometric testing for infants who passed or conditionally passed ABR.

Main Results:

• Four infants (2.9%) had severe sensorineural hearing loss, all failing the initial ABR.
• No infants who passed or conditionally passed ABR showed hearing loss on follow-up.
• Risk factors included intraventricular hemorrhage, apnea, family history, and head/neck malformations.

Conclusions:

• Initial ABR screening can identify infants at high risk for sensorineural hearing loss.
• Delayed ABR screening (3-6 months) may enhance test specificity.
• Identifying high-risk factors aids in targeted neonatal hearing loss detection.