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Unexpected hearing loss in high-risk infants
Pediatrics
|September 1, 1986
Summary
High-risk infants with normal newborn hearing tests can develop sensorineural hearing loss later. This study highlights the need for ongoing auditory monitoring in vulnerable infants post-neonatal intensive care unit discharge.
Area of Science:
- Neonatal Medicine
- Audiology
- Pediatric Neurology
Background:
- High-risk infants often undergo auditory screening before neonatal intensive care unit (NICU) discharge.
- Sensorineural hearing loss (SNHL) is a significant concern in this population.
- The long-term auditory outcomes of infants passing initial screenings are not fully understood.
Purpose of the Study:
- To investigate the incidence of delayed-onset SNHL in high-risk infants who passed initial auditory brainstem response (ABR) screening.
- To identify risk factors associated with the development of SNHL in this cohort.
Main Methods:
- Follow-up audiological assessments were conducted on 11 high-risk infants between 13 and 48 months of age.
- Infants were products of high-risk pregnancies and deliveries, with varying birth weights and gestational ages.
- Clinical data, including NICU complications and medications, were reviewed.
Main Results:
- All 11 infants developed significant SNHL on follow-up, despite normal ABRs at NICU discharge.
- Common complications included respiratory distress, chronic lung disease, and need for mechanical ventilation.
- Other factors included abnormal central nervous system findings, acidosis, and persistent fetal circulation.
Conclusions:
- High-risk infants, including term infants, remain susceptible to developing SNHL post-NICU discharge, even after passing newborn hearing screenings.
- Prolonged illness and interventions in the NICU may contribute to delayed auditory impairment.
- Regular, long-term audiological monitoring is crucial for high-risk infants.