MAUDE Adverse Event Report: COCHLEAR LTD NUCLEUS ABI541 AUDITORY BRAINSTEM IMPLANT; NUCLEUS AUDITORY BRAINSTEM IMPLANT SYSTEM

Model Number	ABI541
Medical Device Problem Code	Appropriate Device Problem Term/Code Not Available (3191)
Health Effect - Clinical Code	Appropriate Clinical Signs, Symptoms and Conditions Term/Code Not Available (4581)
Date of Event	12/08/2025
Type of Reportable Event	Serious Injury
Event or Problem Description
Per the clinic, the device was electively explanted on (b)(6) 2025, due to mri is needed for other health issue.There are no plans to reimplant the patient with a new device as of the date of this report.

• Brand Name: NUCLEUS ABI541 AUDITORY BRAINSTEM IMPLANT
• Common Device Name: NUCLEUS AUDITORY BRAINSTEM IMPLANT SYSTEM
• Manufacturer (Section D): COCHLEAR LTD; 1 university avenue; macquarie university, nsw 2109 ; AS 2109
• MDR Report Key: 24033815
• Report Number: 6000034-2026-00234
• Device Sequence Number: 9058134
• Product Code: MHE
• UDI-Device Identifier: 09321502020404
• UDI-Public: (01)09321502020404(11)160223(17)180222
• Combination Product (Y/N): N
• Initial Reporter State: OH
• Initial Reporter Country: US
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2016
• Device Explanted Year: 2025
• Serviced by Third Party (Y/N): N
• Reporter Type: Importer
• Initial Reporter Occupation: Other
• Type of Report: Initial
• Report Date (Section B): 01/12/2026
• Report Date (Section F): 01/12/2026

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: 02/22/2018
• Device Model Number: ABI541
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 12/10/2025
• Was the Report Sent to FDA?: Yes
• Distributor Facility Aware Date: 12/17/2025
• Event Location: Hospital
• Date Report to Manufacturer: 12/17/2025
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 01/12/2026
• 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: 31 YR
• Patient Sex: Male
• Date Report Sent to FDA: 01/12/2026