Evaluation of a sealing device for the intracochlear electrode entry point
AuthorPURSER, SIMON; Shepherd, Robert K.; Clark, Graeme M.
Source TitleJournal of the Otolaryngological Society of Australia
Document TypeJournal Article
CitationsPurser, S., Shepherd, R. K., & Clark, G. M. (1991). Evaluation of a sealing device for the intracochlear electrode entry point. Journal of the Otolaryngological Society of Australia, July, 6(6), 472-480.
Access StatusOpen Access
This is a publisher’s version of an article published in the Journal of the Otolaryngological Society of Australia 1991. This version is reproduced with permission from the Otolaryngological Society of Australia.
Experimental evidence in animals indicates that middle ear infection in the presence of an intracochlear electrode may result in widespread cochlear damage due to the passage of organisms or products of inflammation through the electrode entry point. In this paper, results are presented of a study undertaken to test the efficacy of a titanium electrode entry point seal designed by the principal author, to protect the implanted cochlea from the pathological effects of experimentally induced pneumococcal otitis media in five cats. lntracochlear electrodes were inserted into both cochleas of each cat, one side sealed with the device and the other side left unsealed, as is current operative practice in human cochlear implantation, as a control. After a minimum of twelve post-operative weeks, pneumococcal otitis media was successfully inoculated in all but one (control) middle ear, which was not inoculated due to accidental removal of the electrode. One week after inoculation the animals were sacrificed and cochleas removed for histological examination. Results of histological examination of the cochleas are presented together with bacteriological data. The results of microscopic examination of the bond interface between otic capsule bone and the titanium seal are presented.
Keywordsotolaryngology; intracochlear electrodes; cochlear implants
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