Auditory Performance in Early Implanted Children with Cochleovestibular Malformation and Cochlear Nerve Deficiency

Area of Science:

• Pediatric Otolaryngology
• Neuroscience
• Audiology

Background:

• Cochleovestibular malformation (CVM) and cochlear nerve deficiency (CND) present unique challenges for auditory development.
• Early cochlear implantation (CI) is a critical intervention for hearing restoration in children with inner ear abnormalities.

Purpose of the Study:

• To evaluate the auditory performance of children with CVM/CND who underwent early CI.
• To compare the outcomes of these children with a matched control group with normal inner ear structures.

Main Methods:

• A cohort of 14 children with CVM/CND and unilateral CI (implanted before age 4) was compared to 14 age-matched controls.
• Auditory performance was assessed using Categorical Auditory Performance (CAP)-II and Speech Intelligibility Rating (SIR) scales at 6-month intervals post-implantation.

Main Results:

• No significant overall difference in auditory performance was observed between the CVM/CND group and the control group.
• Children with CVM/CND demonstrated statistically significant improvements in CAP-II scores and SIR scales between evaluations.
• Longer duration of CI use correlated with significant improvements in speech perception outcomes for children with CVM/CND.

Conclusions:

• Early cochlear implantation in children with CVM/CND leads to comparable auditory performance to peers with normal inner ear structures.
• Children with radiographically malformed inner ears benefit significantly from cochlear implantation, showing progressive auditory skill development.