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	Signal Artifact/Noise (1036); High impedance (1291); Therapeutic or Diagnostic Output Failure (3023)
Health Effect - Clinical Code	Discomfort (2330)
Date of Event	04/24/2026
Type of Reportable Event	Malfunction
Event or Problem Description
Per the clinic, the patient experienced loud noise, discomfort, and poor performance with the device.Hardware exchange, troubleshooting and re-programming attempts were made; however, the issue could not be resolved.High impedance was observed in several electrodes.The implanted device remains.It is unknown if there are plans to explant the device and to re-implant the patient with a new device as of the date of this report.

• 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
• Manufacturer (Section G): COCHLEAR LTD; 1 university avenue; macquarie university, nsw 2109 ; AS 2109
• Manufacturer Contact: ehswarakali sadasivam ; unit ug-1, vertical podium; no.8 jalan kerinchi; kuala lumpur, wilayah persekutuan 59200 ; MY 59200
• MDR Report Key: 25200507
• Report Number: 6000034-2026-01768
• Device Sequence Number: 13264370
• Product Code: MCM
• UDI-Device Identifier: 09321502032612
• UDI-Public: (01)09321502032612(11)161212(17)181211
• Combination Product (Y/N): N
• Initial Reporter Country: SP
• PMA/510(K) Number: P970051
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2024
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Other
• Type of Report: Initial
• Report Date (Section B): 05/18/2026

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: 12/11/2018
• Device Model Number: CI532
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 04/24/2026
• Initial Report FDA Received Date: 05/18/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 12/12/2016
• 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: Other
• Patient Age: 77 YR
• Patient Sex: Unknown