Cochlear implant magnet displacement during magnetic resonance imaging

Otol Neurotol. 2008 Sep;29(6):789-190. doi: 10.1097/MAO.0b013e3181825695.


Objective: Magnet displacement is a rare but possible complication in patients with cochlear implants. We report 1 case in a young child that occurred during magnetic resonance imaging scanning, despite precautionary measures taken by the surgeon and the radiographer.

Study design: Retrospective case report.

Setting: This case is presented by the ENT Department of Armand Trousseau Paediatrics Hospital, Paris, France.

Patient: An 8-year-old child, implanted with a Freedom Contour Nucleus cochlear implant, was referred for a 1.5-T cerebral magnetic resonance imaging because of a progressive neurologic disorder.

Conclusion: This rare complication underlines the importance of risk information and preventive measures required, even in case of compatible devices, for performing a magnetic resonance imaging examination in patients wearing a cochlear implant with removable magnet.

Publication types

  • Case Reports

MeSH terms

  • Child
  • Cochlear Implants*
  • Foreign-Body Migration / etiology*
  • Foreign-Body Migration / surgery
  • Hearing Loss, Sensorineural / diagnosis*
  • Hearing Loss, Sensorineural / surgery*
  • Humans
  • Magnetic Resonance Imaging / adverse effects*
  • Magnetics*
  • Male