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Surgical technique for inserting the cochlear multielectrode array into ears with total neo-ossification

W P Gibson1

  • 1Children's Cochlear Implant Centre, Sydney, Australia.

The Annals of Otology, Rhinology & Laryngology. Supplement
|September 1, 1995
PubMed
Summary
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This study introduces the inlay technique for cochlear implantation in ossified cochleas, enabling electrode insertion and restoring some hearing ability in children with meningitis complications.

Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Biomedical Engineering

Background:

  • Meningitis can cause total cochlear ossification, posing challenges for cochlear implant surgery.
  • Traditional cochlear implant techniques are often unsuitable for completely ossified cochleas.

Purpose of the Study:

  • To describe a novel surgical method, the inlay technique, for cochlear implantation in totally ossified cochleas.
  • To evaluate the efficacy of the inlay technique in restoring auditory function.

Main Methods:

  • The inlay technique involves creating a cleft for electrode insertion along the basal coil.
  • This includes drilling along the scala tympani and scala vestibuli to create space without removing the promontory.
  • The technique was applied to five pediatric patients with post-meningitis cochlear ossification.

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Main Results:

  • 12 to 15 electrodes were successfully inserted in all five children.
  • Two children achieved open-set listening ability with sentence recognition scores exceeding 10%.
  • One child demonstrated significant auditory recovery, with scores over 50%.

Conclusions:

  • The inlay technique is a viable surgical option for cochlear implantation in cases of total cochlear ossification.
  • This method can lead to the restoration of open-set hearing in pediatric patients.
  • Further research may explore long-term outcomes and expand the application of this technique.