title: Quality control after cochlear implant surgery by means of rotational tomography.
abstract: OBJECTIVE
  To investigate the intracochlear electrode position in using rotational tomography in adult cochlear implant patients.
  
  
  METHODS
  Retrospective.
  
  
  METHODS
  Tertiary referral center.
  
  
  METHODS
  Eighteen adult patients being implanted either with a Nucleus straight electrode array or a Contour electrode with a total of 22 implanted ears. Preoperative computed tomography had been without evidence for obliteration, ossification, or malformation of the cochlea.
  
  
  METHODS
  Rotational tomography.
  
  
  METHODS
  The intracochlear electrode position was evaluated with regard to scala tympani, scala vestibuli, and a dislocation from one scala to the other. The intraoperative procedure was compared with the electrode position by analyzing the operating reports.
  
  
  RESULTS
  Preliminary results indicate, respectively, that there is a higher incidence of intracochlear trauma in using the Contour electrode array than expected with a more frequent dislocation of electrode arrays from scala tympani to scala vestibuli and that there is a higher rate of scala vestibuli insertions.
  
  
  CONCLUSIONS
  The impact of these findings may influence further developments of electrode arrays as well as surgical techniques for implantation.
authors.affiliation: Department of Otorhinolaryngology, University of Freiburg, Freiburg, Germany. asch@hno1.ukl.uni-freiburg.de
authors.forename: Antje
authors.initials: A
authors.lastname: Aschendorff
authors.forename: Ralf
authors.initials: R
authors.lastname: Kubalek
authors.forename: Bernd
authors.initials: B
authors.lastname: Turowski
authors.forename: Friedhelm
authors.initials: F
authors.lastname: Zanella
authors.forename: Albrecht
authors.initials: A
authors.lastname: Hochmuth
authors.forename: Martin
authors.initials: M
authors.lastname: Schumacher
authors.forename: Thomas
authors.initials: T
authors.lastname: Klenzner
authors.forename: Roland
authors.initials: R
authors.lastname: Laszig
mesh_terms: D000328:Adult; D000818:Animals; D019929:Cochlear Implantation / Q000592:standards*; D004567:Electrodes, Implanted; D019544:Equipment Failure Analysis; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D011474:Prosthesis Design; D011786:Quality Control; D012533:Scala Tympani / Q000000981:diagnostic imaging / Q000601:surgery; D036542:Tomography, Spiral Computed; D016896:Treatment Outcome