• Asma Alahmadi, Saad Alenzi, Mohammed Alsheikh, Saeed Alghamdi, Mostafa E Morra, and Khalid M Badr.
• From the Department of Otolaryngology Head & Neck Surgery (Alahmadi), Ministry of Health, from the Head and Neck Skull Base Health Centre (Alghamdi), from the Department of Otology and Skull Base Surgery (Badr), King Abdullah Medical City, Makkah; from the Department of Otolaryngology, Neurotology & Skull Base Surgery (Alenzi), King Abdullah Ear Specialist Center, King Saud University, Riyadh, from the Department of Otolaryngology, Neurotology & Cochlear Implant (Alsheikh), Royal Commission Hospital, Jubail, Kingdom of Saudi Arabia; and from the Faculty of Medicine (Morra), AlAzhar University, Cairo, Egypt.
• Saudi Med J. 2021 Aug 1; 42 (8): 813-824.

ObjectivesTo systematically review the occurrence of magnet or receiver/stimulator displacement following cochlear implant (CI) placement complication and evaluate the existing literature on this topic.MethodsA systematic literature search was conducted using PubMed, Scopus, Web of Science, Virtual Health Library (VHL), and Cochrane Library. Original studies reporting cases of magnet or receiver-stimulator migration occurring as a complication after CI placement were included. The quality of the included studies was evaluated using the National Institutes of Health Quality Assessment Tool for observational studies and CARE checklist for case studies.ResultsA total of 36 studies, including 6469 patients, were included. Magnet migration was reported in 82 (1.3%) patients, while receiver/stimulator was reported in 4 (0.1%) cases. The cause of magnet migration was identified in 78 cases; MRI-induced movement was the most frequently reported cause (n=43, 55.1%), followed by head trauma (n=25, 32.1%). A total of 20 studies involving 35 patients with magnet migration performed skull radiography to diagnose magnet migration. Revision/exploratory surgery with surgical repositioning or replacement was the most frequent management procedure (n=46).ConclusionsFurther research on magnet pocket design and standard protocols for MRI in CI users is needed. Early diagnosis of magnet migration and instant referral to specialized CI centers is necessary for proper management and prevention of major complications. PROSPERO REG. NO. CRD: 42020204514.Copyright: © Saudi Medical Journal.

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