Recommandations pour la réalisation d’une IRM chez un patient porteur d’implant cochléaire

Dubrulle, F.; Vincent, C.; Varoquaux, A.; Ernst, Olivier; Veillon, F.

doi:10.1016/j.jradio.2011.05.013

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…Nevertheless, this compatibility does not eliminate the risk of incidents, despite following rigorous compliance with manufacturers' safety instructions. (Hassepass et al, 2014) The 2011 recommendations for MRI post cochlear implant are: an indisputable need for the MRI, agreement (among the doctor ordering the MRI, the otolaryngologist, the radiologist and the patient), the manufacturer's authorization, a time interval between device implantation and MRI of at least six months, the systematic removal of the implant's external component and the fitting of an external, close-fitting compressive bandage (Dubrulle et al, 2011). The bandage should be 10 cm wide and should pass around the head in at least two layers (Fig.…”

Section: Discussionmentioning

confidence: 99%

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Magnetic resonance imaging after cochlear implants

et al. 2019

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IntroductionMost cochlear implants are currently compatible with magnetic resonance imaging (MRI) up to 3 T. Nevertheless, this does not completely eliminate the risk of serious accidents. Implant displacements and other adverse events with compatible implants have been reported in the literature.Case reportsAmong the six patients who had MRI after receiving implants at our center, we report three cases with adverse events related to the examination. The first case was complicated by magnet displacement with partial demagnetization. The second case showed total demagnetization, which necessitated removal and reimplantation of the implant. The third case involved severe pain sensation which disrupted the MRI scan. The smallest artifact was found with 3D MRI angiography, and largest artifact was found with diffusion and T2 FLASH.DiscussionMoving the patient into the MRI apparatus must be supervised by an otorhinolaryngology specialist or an experienced radiologist. It is important to consider the magnetic field directions, so that angle between the implant magnetic fields and the MRI B0 always remains less than or equal to 90°. In addition, we recommend the use of an “arrow drawing” to facilitate the orientation of the magnetic field directions. Furthermore, to prevent magnet displacement, we recommend systematic use of a protective splint in addition to bandaging.

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Section: Discussionmentioning

confidence: 99%

“…In January 2015, 4101 patients in France fitted with cochlear implants were recorded on the national register. Many of these patients may need magnetic resonance imaging (MRI) during the course of their lives, since this technology is indicated for diagnosis of a large range of pathologies (Dubrulle et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Magnetic resonance imaging after cochlear implants

et al. 2019

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“…В литературе сообщается о таких осложнениях, как миграция импланта, его демагнитизация, болевые ощущения [8,9]. Поэтому особое внимание следует уделить необходимости проведения МРТ (решение об исследовании принимается совместно с врачом, назначившим МРТ, отоларингологом, рентгено-логом и пациентом) и строгому соблюдению инструкций производителя по технике безопасности проведения исследования [10][11][12].…”

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Safety and efficacy assessment of MRI in cochlear implant patients with retained magnets

Dvoryanchikov¹,

Кузовков²,

Tsutsieva³

et al. 2021

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Most patients with CI need to undergo radiation diagnostics during their lifetime, including magnetic resonance imaging (MRI) and computed tomography (CT). Modern cochlear implants are currently compatible with MRI up to 1.5 T. However, clinics conducting magnetic resonance imaging studies may refuse to diagnose. This is due to the fact that during the study, the MRI scanner will act on the magnet of the implant and this can lead to such complications as migration of the implant, its demagnetization, and pain. These doubts determined the goal of our study - to assess the safety and effectiveness of magnetic resonance imaging (MRI) with a magnetic field power of 1.5 T in patients with cochlear implants (CI). We analyzed MR images of 11 patients who were followed up at the St. Petersburg Research Institute of Ear, Throat, Nose and Speech from 2014 to 2020, diagnosed with bilateral sensorineural hearing loss, grade IV, condition after CI. A questionnaire was conducted to determine the side effects of the study and to assess the diagnostic effectiveness of the method by several radiologists. In order to prevent possible complications, an external, tight-fitting pressure bandage was applied to all patients, and a plastic splint was installed in the projection of the implant in the bandage. During the study, the orientations of the magnetic fields of the MRI scanner (B0) and the implant (B1) were considered. The analysis of the obtained results showed that the MRI procedure with a magnetic field power of 1.5 T in patients with CI was not accompanied by any complications for patients and a negative effect on the implant. It is important to note that the diagnostic efficacy of the MRI results was maintained.

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Magnetresonanztomographie bei Patienten mit magnetversorgten Hörimplantaten

2013

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For patients wearing hearing implants with an implantable magnet the indications for MRI in devices with MRI certification should be rigorously restricted. Possible defects/dislocation of the implants may occur and the quality of the skull MRI images is reduced. A close contact between the radiologist and the implanting team is required. Other diagnostic procedure options should be exhausted before employing MRI.

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Recommandations pour la réalisation d’une IRM chez un patient porteur d’implant cochléaire

Cited by 8 publications

References 13 publications

Magnetic resonance imaging after cochlear implants

Magnetic resonance imaging after cochlear implants

Safety and efficacy assessment of MRI in cochlear implant patients with retained magnets

Magnetresonanztomographie bei Patienten mit magnetversorgten Hörimplantaten

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