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Implantation of the ossified cochlea: management with the split electrode array
D A Millar1, Todd A Hillman, Clough Shelton
1Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, University of Utah Health Sciences Center, Salt Lake City, Utah, USA.
The Laryngoscope
|December 22, 2005
Summary
Split electrode array cochlear implants offer a viable alternative for patients with cochlear ossification, demonstrating significant improvements in sound and speech perception for both adults and children.
Area of Science:
- Otolaryngology
- Biomedical Engineering
- Neuroscience
Background:
- Cochlear ossification presents challenges for traditional cochlear implant efficacy.
- Split electrode arrays offer a novel approach to overcome anatomical limitations.
Purpose of the Study:
- To evaluate the indications, surgical technique, and functional outcomes of split electrode array cochlear implantation.
- To assess the effectiveness of this technology in patients with cochlear ossification.
Main Methods:
- Retrospective chart review of five patients (two adults, three children) implanted with split electrode arrays.
- Pre- and postoperative audiological assessments including pure tone thresholds and speech perception tests (CNC, HINT, IT-MAIS).
Main Results:
- Significant improvements in hearing thresholds and speech perception were observed post-implantation.
- Adults showed average threshold gain of 38.5 dB, with one achieving 72% speech perception. Children averaged 28/40 on the IT-MAIS.
- The split electrode array demonstrated high functional integrity with 42 of 48 electrodes operational.
Conclusions:
- Split electrode arrays are a valuable alternative for deafened individuals with cochlear ossification.
- This technology leads to marked improvements in auditory and speech perception, enhancing quality of life.