Case report: traumatic displacement of a cochlear implant magnet

Ann Otol Rhinol Laryngol. 2014 Apr;123(4):229-31. doi: 10.1177/0003489414525922.


Objectives: To date, over 200 000 cochlear implants (CIs) have been implanted worldwide and the incidence is still increasing. We present a case of traumatic displacement of CI magnet to raise awareness about this complication and to highlight the need for vigilance during surgery as well as for proper counseling.

Methods: The clinical presentation of a 1.5-year-old boy with a traumatic displacement of a CI magnet was presented and the literature was reviewed for this rare complication.

Results: After minor head injury, the sound processor could no longer connect to the CI. X-ray imaging demonstrated displacement of the CI magnet. During revision surgery, the magnet was replaced by a new magnet in the silicon holding cap. Intraoperative impedance measurements were normal and the CI was successfully activated 4 weeks postoperatively.

Conclusions: Clinicians and patients should be aware of the risk of displacement of the CI magnet after (minor) head injury. Young boys tend to have a higher risk for this complication.

Keywords: cochlear implant; traumatic displacement.

Publication types

  • Case Reports
  • Review

MeSH terms

  • Accidental Falls*
  • Cochlear Implants*
  • Craniocerebral Trauma / complications*
  • Humans
  • Infant
  • Magnets*
  • Male
  • Prosthesis Failure / etiology*