title: Evaluation of cochlear implant electrode position after a modified round window insertion by means of a 64-multislice CT.
abstract: CONCLUSIONS
  The modified round window insertion enables reproducible insertion into the scala tympani as demonstrated by comparing the 64-CT scanning data and the surgeon's reports.
  
  
  OBJECTIVE
  To estimate the postoperative cochlear implant electrode position using a modified round window approach.
  
  
  METHODS
  In a prospective study, 82 patients were operated via a modified round window approach to insert primarily into the scala tympani. Surgery had been performed from 2005 to 2008, implanting a Nucleus Freedom RECA device (Cochlear Corp.) (n = 43) or 90 k Helix device (Advanced Bionics Corp.) (n = 39). The array localization within the cochlea was determined by axial scanning overview, digital reconstruction of a 64-slice CT and by evaluation of the surgeon's report.
  
  
  RESULTS
  In 78 (95.1%) patients, the array could be located in the scala tympani. In four cases, the position of the electrode was changed intracochlearly from the scala tympani to the scala vestibuli. In three additional cases, the scala vestibuli was inserted intentionally because the tympanic scale was found to be obstructed intraoperatively due to ossification. There were no significant differences between the intraoperative positioning and postoperative localization of the electrode arrays of the two manufacturers.
authors.affiliation: Department of Otolaryngology, UKB, Hospital of the University of Berlin (Charité Medical School), Berlin, Germany. Ingo.Todt@ukb.de
authors.forename: Ingo
authors.initials: I
authors.lastname: Todt
authors.forename: Grit
authors.initials: G
authors.lastname: Rademacher
authors.forename: Jan
authors.initials: J
authors.lastname: Wagner
authors.forename: Friederike
authors.initials: F
authors.lastname: Göpel
authors.forename: Dietmar
authors.initials: D
authors.lastname: Basta
authors.forename: Ernst
authors.initials: E
authors.lastname: Haider
authors.forename: Arne
authors.initials: A
authors.lastname: Ernst
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019929:Cochlear Implantation; D003054:Cochlear Implants; D006801:Humans; D008875:Middle Aged; D011446:Prospective Studies; D012405:Round Window, Ear / Q000601:surgery; D012533:Scala Tympani / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed; D055815:Young Adult