MAUDE Adverse Event Report: Cochlear Ltd Nucleus CI522 Cochlear Implant with Slim Straight Electrode; Nucleus 24 Cochlear Implant System

Model Number	CI522
Medical Device Problem Codes	Device Dislodged or Dislocated (2923); Device Handling Problem (3265)
Health Effect - Clinical Code	Pain (1994)
Type of Reportable Event	Serious Injury
Event or Problem Description
Per the clinic, the patient experienced pain during a 3 tesla mri procedure.The patient's head had been wrapped in accordance with cochlear's recommendations; however, the implant magnet subsequently became dislodged during the mri, resulting in damage to the implant magnet pocket.It was reported that the mri kit was applied incorrectly.Surgery to replace the magnet was subsequently completed (date not reported).

• Brand Name: Nucleus CI522 Cochlear Implant with Slim Straight Electrode
• Common Device Name: Nucleus 24 Cochlear Implant System
• Manufacturer (Section D): Cochlear Ltd; 1 university avenue; macquarie university, nsw 2109 ; AS 2109
• Manufacturer (Section G): Cochlear Ltd; 1 university avenue; macquarie university, nsw 2109 ; AS 2109
• Manufacturer Contact: hakim muhaimin jamil ; unit ug-1, vertical podium; no. 8 jalan kerinchi; kuala lumpur, wilayah persekutuan 59200 ; MY 59200
• MDR Report Key: 50769061
• Report Number: 6000034-2026-03265
• Device Sequence Number: 16092354
• Product Code: MCM
• UDI-Device Identifier: 09321502032599
• Combination Product (Y/N): N
• Initial Reporter Country: SZ
• PMA/510(K) Number: P970051
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2016
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Type of Report: Initial
• Report Date (Section B): 09/15/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Operator of Device: Lay User/Patient
• Device Expiration Date: 07/17/2018
• Device Model Number: CI522
• Device Catalogue Number: Z382660
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: No
• Initial Date Received by Manufacturer: 08/24/2026
• Initial Report FDA Received Date: 09/15/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 07/18/2016
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Required Intervention; Other
• Patient Sex: Male