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    The surgery for multiple-electrode cochlear implantations

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    Author
    Clark, Graeme M.; Pyman, Brian C.; Bailey, Quentin R.
    Date
    1979
    Source Title
    Journal of Laryngology and Otology
    Publisher
    Cambridge University Press
    University of Melbourne Author/s
    Clark, Graeme; PYMAN, BRIAN
    Metadata
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    Document Type
    Journal Article
    Citations
    Clark, G. M., Pyman, B. C., & Bailey, Q. R. (1979). The surgery for multiple-electrode cochlear implantations. Journal of Laryngology and Otology, 93(3), 215-223.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/28718
    Description

    This is a publisher’s version of an article published in The Journal of Laryngology & Otology © 1979 Cambridge University Press. www.cambridge.org/

    Abstract
    The multiple-electrode hearing prosthesis designed in the Departments of Otolaryngology and Electrical Engineering (UMDOLEE) at the University of Melbourne (Clark et al., 1977) has been miniaturized with hybrid circuitry so that, if design changes are necessary as a result of initial patient testing, they can be made at minimal cost. This results, however, in increased package dimensions which makes its placement and the design of the surgery more critical. This problem is increased by the fact that we have considered it important to be able to remove the package and replace it with another without disturbing the implanted electrode array, should the first receiver-stimulator fail or an improved design become available. This has meant the design of a special connector (Patrick, 1977; Clark et al., 1978) which adds to the dimensions of the implanted unit. In addition the placement of the coils for transmitting power and information has to be considered. Not only is it desirable to site the coils at a convenient location behind the ear to facilitate the placement and wearing of the external transmitter, but there should also be no relative movement between the coils and the electronic package. These design considerations have led to the sitting of the coils on top of the hermetically-sealed box, and further increased the height of the package. The dimensions of the package shown in Fig. 1 are length 42 mm, width 32 mm, height of connector 8.5 mm, height of receiver-stimulato unit 13 mm. The surgical considerations discussed are the result of a number of temporal bone and cadaver dissections, and the surgical implantation at The Royal Victorian Eye and Ear Hospital of the UMDOLEE unit in a specially-selected patient.
    Keywords
    cochlear implant; hearing prosthesis; otolaryngology

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