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Case report: Cochlear implant magnet migration.

Eric P Wilkinson1, Salim Dogru, Ted A Meyer

  • 1Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa 52242, USA. eric-wilkinson@uiowa.edu

The Laryngoscope
|October 29, 2004
PubMed
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A cochlear implant magnet migrated in a pediatric patient after a fall, causing device malfunction. This is the first reported case of cochlear implant magnet migration, highlighting a potential complication.

Area of Science:

  • Otolaryngology
  • Biomedical Engineering
  • Pediatric Audiology

Background:

  • Cochlear implants (CIs) are vital for hearing restoration in children.
  • Device complications can impact audiological outcomes.
  • Routine monitoring is essential for pediatric CI recipients.

Purpose of the Study:

  • To report the first known case of cochlear implant magnet migration.
  • To describe the clinical presentation and diagnostic findings associated with CI magnet displacement.
  • To raise awareness of this rare complication in pediatric CI users.

Main Methods:

  • A case study of a 13-month-old cochlear implant recipient.
  • Clinical observation of device performance and audiological testing.
  • Radiographic imaging (AP and lateral skull views) to assess internal magnet position.

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Main Results:

  • The patient experienced a fall impacting the CI area.
  • Delayed onset of symptoms included external coil displacement and reduced sound perception.
  • Audiological testing revealed abnormal device impedances.
  • Radiographs confirmed internal magnet migration from the internal coil to the receiver/stimulator.

Conclusions:

  • Internal magnet migration is a rare but possible complication following cochlear implantation.
  • Trauma, such as falls, may contribute to magnet displacement.
  • This case underscores the importance of considering device integrity in CI recipients presenting with declining performance.