Korean J Otorhinolaryngol-Head Neck Surg.
2007 Nov;50(11):1051-1053.
Magnet Displacement Following Cochlear Implantation
- Affiliations
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- 1Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. thyoon@amc.seoul.kr
Abstract
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BACKGROUND AND OBJECTIVES: To describe a rare complication of cochlear implantation, such as magnet displacement which can be diagnosed easily with simple skull radiographs and treated with minimal surgery.
MATERIALS AND METHOD: The record of male who experienced CI magnet dislodgement was reviewed.
RESULTS
The patient was seen with a displaced magnet under the skin 15 days after a head trauma (1 month after implantation). The patient was implanted with the Nucleus 24 device at the age of 3 years. Plain skull radiographs showed the dislocated magnet. Surgery was limited to the revision of the receiver/stimulator site and reinsertion of the magnet to its pocket. Intraoperative neural response telemetry was normal in the patient. Postoperative auditory responses were as good as those measured before the complication.
CONCLUSION
The displaced magnet can be successfully managed by a simple revision procedure. The possibility of magnet migration should be considered in cases of device malfunction.
