MAUDE Adverse Event Report: COCHLEAR LTD NUCLEUS CI422 COCHLEAR IMPLANT WITH STRAIGHT ELECTRODE; NUCLEUS 24 COCHLEAR IMPLANT SYSTEM

Model Number	CI422
Medical Device Problem Code	Appropriate Device Problem Term/Code Not Available (3191)
Health Effect - Clinical Code	Wound Infection (2447)
Type of Reportable Event	Serious Injury
Event or Problem Description
Per the clinic, the patient experienced wound infection (specific date not reported).Subsequently, the device was explanted in (b)(6) 2017 (specific date not reported) and the electrode is left in-situ in the cochlea.Additional information has been requested but has not been made available as of the date of this report.

• Brand Name: NUCLEUS CI422 COCHLEAR IMPLANT WITH 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: anu sundaraji ; unit ug-1, vertical podium; no. 8 jalan kerinchi; kuala lumpur, wilayah persekutuan 59200 ; MY 59200
• MDR Report Key: 24329917
• Report Number: 6000034-2026-00531
• Device Sequence Number: 20026417
• Product Code: MCM
• UDI-Device Identifier: 09321502020268
• UDI-Public: (01)09321502020268(11)170104(17)190103
• Combination Product (Y/N): N
• Initial Reporter Country: VE
• PMA/510(K) Number: P970051
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2017
• 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): 02/13/2026

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: 01/03/2019
• Device Model Number: CI422
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 01/20/2026
• Initial Report FDA Received Date: 02/13/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 01/04/2017
• 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
• Patient Sex: Male