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Magnetic Resonancy Imaging Safety in Active Osseointegrated (Osia®) and Cochlear Implants: New Technology Creating
Ibrahim Abdalla1, Janet S Choi2, Griffin Struyk1
1University of Minnesota School of Medicine, Minneapolis, Minnesota, U.S.A.
The Laryngoscope
|June 8, 2023
Summary
Patients with non-MRI-compatible cochlear implants (CIs) and bone-anchored auditory appliances (BAHAs) experienced magnet dislocation during MRI scans. This highlights risks associated with incompatible devices and the need for clearer guidelines.
Area of Science:
- Otolaryngology
- Radiology
- Biomedical Engineering
Background:
- Growing use of magnetic resonance imaging (MRI) in patients with cochlear implants (CIs) and bone-anchored auditory appliances (BAHAs).
- Existing confusion regarding the MRI compatibility of various implantable hearing devices.
- Potential risks associated with undergoing MRI with non-MRI-compatible devices.
Observation:
- Two cases of internal magnet dislocation and inversion in patients with non-MRI-compatible devices during MRI.
- Case 1: Bilateral Cochlear Osia implants experienced magnet dislocation after 1.5 Tesla MRI.
- Case 2: A legacy CI patient experienced magnet dislocation and inversion after 3 Tesla MRI.
Findings:
- Internal magnet dislocation and inversion occurred in both Cochlear Osia and legacy CI devices post-MRI.
- The magnets dislocated from the silastic sheath, with one magnet flipping.
- The severity of MRI field strength (1.5T vs 3T) did not prevent magnet displacement.
Implications:
- Highlights the critical need for improved patient education regarding MRI safety with CIs and BAHAs.
- Suggests a requirement for simplified and clearer radiology guidelines for healthcare professionals.
- Underscores the importance of device compatibility verification before MRI procedures to prevent adverse events.
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