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The management of cochlear nerve deficiency
Cochlear Implants International
|February 19, 2014
Summary
Assessing profoundly deaf children with cochlear nerve deficiency (CND) for cochlear implants or auditory brainstem implants (ABI) requires careful evaluation. Outcomes vary, and many children may need sign language, with long-term ABI results still unknown.
Area of Science:
- Audiology
- Neurosurgery
- Pediatric Medicine
Background:
- Cochlear nerve deficiency (CND) presents challenges for hearing restoration in profoundly deaf children.
- Accurate assessment is crucial for determining candidacy for cochlear implants (CI) or auditory brainstem implants (ABI).
Purpose of the Study:
- To outline the critical assessment process for profoundly deaf children with CND.
- To discuss the suitability and potential outcomes of cochlear implants and auditory brainstem implants in this population.
Main Methods:
- Mandatory Magnetic Resonance Imaging (MRI) with specific sequences to diagnose CND.
- Behavioral and electrophysiological tests, including electric auditory brainstem response (EABR), to assess auditory function and tissue.
- Evaluation of age and cognitive development for ABI candidacy.
Main Results:
- MRI is essential for diagnosing CND, but auditory tests may reveal functional tissue not visible on imaging.
- EABR can help quantify auditory tissue and guide decisions on CI benefit.
- Hearing outcomes for both CI and ABI are variable and potentially limited in children with CND.
Conclusions:
- The assessment process for CI and ABI in children with CND is complex, involving imaging and functional testing.
- Age and cognitive factors are paramount for ABI success.
- Profound hearing loss in CND may necessitate alternative communication methods like sign language, and long-term ABI outcomes require further study.
