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Electrode to modiolus proximity: a fluoroscopic and histologic analysis
J T Roland1, A J Fishman, G Alexiades
1Department of Otolaryngology, New York University School of Medicine, New York 10016, USA.
Hypothesis:
This study was conducted to evaluate the electrode to modiolus proximity of two commonly used electrodes (Nucleus and Clarion) and a new prototype electrode.
Background:
Theoretical advantages of modiolus-hugging cochlear implant electrodes include reduced stimulus energy requirements, more efficient power management and longer battery life, more discreet ganglion cell population stimulation, and reduced facial nerve stimulation.
Methods:
Fluoroscopic analysis and histologic surface preparation analysis of electrode position and trauma.
Results:
The Nucleus straight electrode occupied an outer wall position in the scala tympani. The Clarion electrode occupied a more intermediate position. The actively coiling prototype electrode was modiolus hugging but caused more trauma than the other two electrodes tested.
Conclusions:
The optimal modiolus-hugging atraumatic intracochlear electrode does not currently exist.
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