Seeing electrode movement in the cochlea

Micro-focus fluoroscopy - A great tool for electrode development

Jin Xu*, Rob Briggs, Michael Tyconcinski, Carrie Newbold, Frank Risi, Robert Cowan

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Citations (Scopus)


The aim of this study was to utilise micro-focus X-ray fluoroscopy for viewing electrode movement in the cochlea. Various prototypes of newly designed cochlear implant electrodes were evaluated during insertion studies on human cadaver temporal bones. The magnified fluoroscopic images were observed in real-time and recorded for retrospective studies. In 30 insertions of hearing preservation (Hybrid-L) arrays, fluoroscopy provided crucial information on the tip design, length of array and stiffening stylet. In 44 insertions of Contour Advance enhanced (CAe) arrays, the length, curvature, depth of insertion and degree of stiffness were assessed. CAe arrays were successfully inserted to the designated depth and positioned close to the modiolus. High quality microfocus fluoroscopic images of electrode movement in the cochlea greatly assisted in the validation of newly designed intra-cochlear electrode arrays.

Original languageEnglish
Pages (from-to)115-119
Number of pages5
JournalCochlear implants international
Issue numberSUPPL. 1
Publication statusPublished - 2009
Externally publishedYes


  • Cochlea
  • Electrode
  • Insertion
  • Micro-focus X-ray imaging
  • Temporal bone

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