Open AccessJournal Article
The biologic safety of the Cochlear Corporation multiple-electrode intracochlear implant
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Studies have been undertaken to confirm the biologic safety of the Cochlear Corporation multi-electrode intracochlear implant.Abstract:
Studies have been undertaken to confirm the biologic safety of the Cochlear Corporation multi-electrode intracochlear implant. The materials used are biocompatible. The electrode array is flexible: it can be inserted with minimal or no trauma, providing the insertion is stopped when resistance is first felt. An atraumatic insertion is facilitated if a good view is obtained along the scala tympani of the basal turn of the cochlea by drilling through the crista fenestrae. The passage of the electrode around the cochlea can be facilitated if the electrode is rotated during insertion (clockwise for the left and anticlockwise for the right cochlea). The electrode can be explanted and another one reinserted with minimal or no trauma. A seal established around the electrode after an implantation period of 2 weeks can prevent infection extending from the middle to the inner ear. The electrical stimulus parameters produced by the Nucleus receiver-stimulator cause no loss of spiral ganglion cells or corrosion of the platinum band electrodes. Long-term stimulation has been carried out for up to 8 years in patients without affecting their clinical performance.read more
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Journal ArticleDOI
Vestibular effects of cochlear implantation.
TL;DR: Cochlear implantation carries with it the potential risk for vestibular system insult or stimulation with resultant dysfunction, and understanding the significance of this risk takes on an increasing importance.
Journal ArticleDOI
Cochleostomy site: Implications for electrode placement and hearing preservation
TL;DR: The results of this paper demonstrate that the cochleostomy must be made inferior, rather than anterior, to the round window to ensure scala tympani insertion and to decrease the likelihood of insertion-induced intracochlear damage during electrode insertion.
Journal ArticleDOI
Comparison of round window and cochleostomy approaches with a prototype hearing preservation electrode
Robert Briggs,Michael Tykocinski,Jin Xu,Frank Risi,Martin Svehla,Robert Cowan,Timo Stöver,Peter Erfurt,Thomas Lenarz +8 more
TL;DR: A prototype hearing preservation electrode array was inserted by either a RWM or a scala tympani cochleostomy without evidence of significant intracochlear trauma.
Journal ArticleDOI
Intracochlear inflammatory response to cochlear implant electrodes in humans.
Mohammad Seyyedi,Joseph B. Nadol +1 more
TL;DR: An inflammatory response is common after cochlear implantation, and it is more robust at the cochleostomy than distal to it, suggesting the role of trauma of insertion as a contributing factor.
Journal ArticleDOI
Comparison of electrode position in the human cochlea using various perimodiolar electrode arrays.
Michael Tykocinski,Lawrence T. Cohen,Brian C. Pyman,Thomas Roland,Claudiu Treaba,Claudiu Treaba,Joseph E.A. Palamara,Markus C. Dahm,Robert K. Shepherd,Jin Xu,Robert Cowan,Noel L. Cohen,Graeme M. Clark +12 more
TL;DR: None of the three perimodiolar electrode array designs investigated fulfilled satisfactorily all three criteria of being easy, safe, and atraumatic to implant.