Pitfalls in magnetic resonance imaging examination of hearing implant patients

Patients with hearing implants are at higher risk for complications during magnetic resonance imaging (MRI) examinations due to their magnet-carrying implants. At the same time, the chance of receiving an MRI indication during lifetime is high. The aim of this study was to identify difficulties for implant users during MRI examinations. Prior to MRI, the indication was checked for known risks, and examination refusals already occurred. The prospective study included 39 patients with hearing implants of varying MRI conditionality who were scheduled to undergo MRI from 05/2018 to 04/2021. Patients received a standard wrapping dressing. Pre- and post-diagnostic questionnaire interviews were conducted with the patient (e.g., for pain) and the otolaryngologist (e.g., for clinical evidence of magnetic dislocation). In five patients, the planned MRI was not performed. Thus, 34 patients (25 CI unilateral, 8 CI bilateral, 1 VSB), or 38 MRI examinations could be evaluated with regard to complications. In 82%, pain was reported using a visual analog scale (0-10), with an average severity of 6. In three cases, the examination was aborted (8%), and in one case (2%), magnetic dislocation occurred despite bandaging, which subsequently required surgical treatment. Although MRI procedure can now be considered safe for hearing implant users under professional guidance, obstacles are evident. In particular, patients implanted before the upgrade to the new generation of magnets suitable for MRI are more likely to experience complications. These can be minimized by adequate management, but not completely avoided.

Publication History

Article published online:
12 May 2023