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The scala vestibuli for cochlear implantation. An anatomic study
1Department of Otolaryngology-Head and Neck Surgery, Georgetown University, Washington, DC, USA.
Archives of Otolaryngology--Head & Neck Surgery
|February 1, 1996
Summary
Cochlear implantation may be feasible via the scala vestibuli (SV) and scala media when the scala tympani (ST) is ossified. Anatomical dimensions suggest the SV and scala media can accommodate electrode arrays, offering an alternative surgical route.
Area of Science:
- Otolaryngology
- Neurosurgery
- Biomedical Engineering
Background:
- Cochlear implantation traditionally uses the scala tympani (ST) for electrode insertion.
- Scala tympani ossification presents a surgical challenge, often requiring drilling.
- The scala vestibuli (SV) is a theoretical alternative insertion route.
Purpose of the Study:
- To assess the anatomical feasibility of cochlear implantation via the SV.
- To determine if SV dimensions can accommodate a cochlear implant electrode array.
Main Methods:
- Analysis of 20 normal human temporal bones.
- Comparison of the maximum diameter and surface area of the ST versus the combined SV and scala media.
Main Results:
- The SV and scala media dimensions were comparable to the ST.
- The combined SV and scala media appear anatomically sufficient for electrode array insertion.
Conclusions:
- The combination of SV and scala media presents a viable alternative for electrode insertion.
- This route is particularly relevant for cases with an obliterated ST.
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