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Case report: traumatic displacement of a cochlear implant magnet
Stijn Keereweer1, Marc P Van der Schroeff, Bas Pullens
1Department of Otorhinolaryngology, Sophia Children's Hospital, Erasmus Medical Centre, Rotterdam, the Netherlands.
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.
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