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	Insufficient Device Problem Information (3190)
Health Effect - Clinical Code	Insufficient Information (4580)
Type of Reportable Event	Serious Injury
Event or Problem Description
Per the clinic, the device was explanted on (specific date not reported) for unknown reasons.It is unknown if there are plans to reimplant the patient as of the date of this report.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
• MDR Report Key: 50835365
• Report Number: 6000034-2026-03282
• Device Sequence Number: 10059852
• Product Code: MCM
• UDI-Device Identifier: 09321502020268
• Combination Product (Y/N): N
• Initial Reporter Country: US
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2015
• Serviced by Third Party (Y/N): N
• Reporter Type: Importer
• Type of Report: Initial
• Report Date (Section B): 09/21/2026
• Report Date (Section F): 09/21/2026

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: 07/20/2016
• Device Model Number: CI422
• Device Catalogue Number: P190574
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: No
• Was the Report Sent to FDA?: Yes
• Distributor Facility Aware Date: 08/24/2026
• Event Location: Hospital
• Date Report to Manufacturer: 08/24/2026
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 09/21/2026
• 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: Female
• Date Report Sent to FDA: 09/21/2026