MAUDE Adverse Event Report: Cochlear Ltd Nucleus CI512 Cochlear Implant with Contour Advance Electrode; Nucleus 24 Cochlear Implant System

Model Number	CI512
Medical Device Problem Codes	Circuit Failure (1089); Unexpected Therapeutic Results (1631)
Health Effect - Clinical Code	Appropriate Clinical Signs, Symptoms and Conditions Term/Code Not Available (4581)
Type of Reportable Event	Serious Injury
Event or Problem Description
Per the clinic, the patient experienced poor performance with the device and open circuits were noted on ec1 electrodes.Re-programming attempts were made; however, the issue could not be resolved.There are plans to explant the device and to reimplant the patient with a new device; however, this has not occurred as of the date of this report.

• Brand Name: Nucleus CI512 Cochlear Implant with Contour Advance Electrode
• Common Device Name: Nucleus 24 Cochlear Implant System
• Manufacturer (Section D): Cochlear Ltd; 1 university avenue; macquarie university, nsw 2109 ; AS 2109
• MDR Report Key: 50683006
• Report Number: 6000034-2026-03153
• Device Sequence Number: 13367972
• Product Code: MCM
• UDI-Device Identifier: 09321502014564
• Combination Product (Y/N): N
• Initial Reporter State: FL
• Initial Reporter Country: US
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Importer
• Type of Report: Initial
• Report Date (Section B): 09/09/2026
• Report Date (Section F): 09/09/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Lay User/Patient
• Device Expiration Date: 08/03/2017
• Device Model Number: CI512
• Device Catalogue Number: Z209051
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: No
• Was the Report Sent to FDA?: Yes
• Distributor Facility Aware Date: 08/13/2026
• Date Report to Manufacturer: 08/13/2026
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 09/09/2026
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Sex: Male
• Date Report Sent to FDA: 09/09/2026