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[Surgery and electroneurophysiological evaluation for CI case with modiolus ossification]
Summary
Cochlear implantation (CI) in cases with modiolus ossification presents surgical challenges. A negative post-operative electrophysiological test (EABR) may indicate surgical failure and poor speech recognition outcomes.
Area of Science:
- Otolaryngology
- Neurosurgery
- Audiology
Context:
- Modiolus ossification complicates cochlear implantation (CI).
- Temporal bone high-resolution computed tomography (HRCT) identifies modiolus ossification.
- This study focuses on CI in patients with modiolus ossification.
Purpose:
- To report surgical techniques for CI in modiolus ossification cases.
- To correlate electrophysiologic test results with speech recognition outcomes.
- To define indications for CI in this specific patient group.
Summary:
- Seven patients with modiolus ossification underwent CI surgery.
- Intraoperative impedance was normal; however, 6/7 showed atypical electroencephalography auditory brainstem response (EABR) waves.
- Speech recognition varied, with 0% in the patient lacking EABR response and 30-100% in others.
Impact:
- Spiral electrode insertion is frequently hindered by ossification.
- Atypical EABR waves and poor speech recognition correlate with modiolus ossification.
- Post-operative negative EABR response suggests potential CI surgical failure.
