MAUDE Adverse Event Report: COCHLEAR LTD NUCLEUS CI532 COCHLEAR IMPLANT WITH SLIM MODIOLAR ELECTRODE; NUCLEUS 24 COCHLEAR IMPLANT SYSTEM

Model Number	CI532
Medical Device Problem Codes	Failure to Deliver Shock/Stimulation (1133); Therapeutic or Diagnostic Output Failure (3023)
Health Effect - Clinical Code	Solid Tumour (4552)
Date of Event	04/03/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
Per the clinic, the patient experienced progressively decreased benefit to the point of no longer hearing from the implanted device due to tumors growing markedly.The device was subsequently explanted on (b)(6) 2026 and the patient was reimplanted with a new device during the same surgery.

• Brand Name: NUCLEUS CI532 COCHLEAR IMPLANT WITH SLIM MODIOLAR 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: 24994329
• Report Number: 6000034-2026-01521
• Device Sequence Number: 9757160
• Product Code: MCM
• UDI-Device Identifier: 09321502032612
• UDI-Public: (01)09321502032612(11)180322(17)200321
• Combination Product (Y/N): N
• Initial Reporter State: IA
• Initial Reporter Country: US
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2018
• Device Explanted Year: 2026
• Serviced by Third Party (Y/N): N
• Reporter Type: Importer
• Initial Reporter Occupation: Other
• Type of Report: Initial
• Report Date (Section B): 04/27/2026
• Report Date (Section F): 04/27/2026

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?: No
• Operator of Device: Lay User/Patient
• Device Expiration Date: 03/21/2020
• Device Model Number: CI532
• Was Device Available for Evaluation?: No
• Was the Report Sent to FDA?: Yes
• Distributor Facility Aware Date: 04/03/2026
• Event Location: Hospital
• Date Report to Manufacturer: 04/03/2026
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 04/27/2026
• 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 Age: 29 YR
• Patient Sex: Female
• Date Report Sent to FDA: 04/27/2026