Evaluation of the short hybrid electrode in human temporal bones

J. Thomas Roland, Daniel M. Zeitler, Daniel Jethanamest, Tina C. Huang

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


HYPOTHESIS:: The current hybrid electrode can be inserted without trauma to the temporal bone and, after insertion, assumes a position within the scala tympani near the outer cochlear wall just beneath the basilar membrane. BACKGROUND:: Conservation of residual hearing after cochlear implant electrode insertion requires a special insertion technique and an atraumatic short electrode. This allows electroacoustic stimulation in ears with significant residual hearing. METHODS:: Human cadaveric temporal bones were implanted with soft surgical technique under fluoroscopic observation. Dehydrated and resin-impregnated bones are dissected. Real-time electrode insertion behavior and electrode position were evaluated. The bones are examined for evidence of insertion-related trauma. RESULTS:: No gross trauma was observed in the implanted bones, and the electrode dynamics evaluation revealed smooth scala tympani insertions. CONCLUSION:: Atraumatic insertion of the 10-mm hybrid electrode can be accomplished using an appropriate cochleostomy and insertion technique.

Original languageEnglish (US)
Pages (from-to)482-488
Number of pages7
JournalOtology and Neurotology
Issue number4
StatePublished - Jun 1 2008


  • Cochlear implant
  • Electroacoustic hearing
  • Hybrid electrode
  • Temporal bone


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