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Incidence for Tip Foldover During Cochlear Implantation.

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Tip foldover, a cochlear implantation complication, occurred in 0.87% of cases, with perimodiolar electrodes posing the highest risk. Revision surgery was often feasible for this electrode malposition.

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Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Medical Imaging

Background:

  • Cochlear implantation (CI) is a complex surgical procedure.
  • Electrode placement is critical for CI success.
  • Tip foldover is a potential complication during CI.

Purpose of the Study:

  • To determine the incidence and clinical presentation of tip foldover during cochlear implantation.
  • To evaluate tip foldover rates associated with different electrode carrier types.
  • To describe postoperative complications and revision rates for tip foldover.

Main Methods:

  • Retrospective case review of 1,320 cochlear implantation recipients.
  • Analysis of postoperative imaging (Stenvers view, CT, DVT).
  • Evaluation of tip foldover rates for perimodiolar, lateral wall, and mid-scalar electrodes.

Main Results:

  • Tip foldover occurred in 0.87% of ears (15/1,722).
  • Perimodiolar electrodes had the highest tip foldover rate (1.67%).
  • Complications included facial nerve costimulation and vertigo; 11 patients underwent revision surgery.

Conclusions:

  • Tip foldover incidence is low (0.87%) in experienced centers.
  • Perimodiolar electrodes are associated with a higher risk of tip foldover.
  • Revision surgery is a viable option for managing tip foldover.