MAUDE Adverse Event Report: COCHLEAR LTD COCHLEAR¿ NUCLEUS® NEXA® COCHLEAR IMPLANT WITH SLIM STRAIGHT ELECTRODE; COCHLEAR¿ NUCLEUS® NEXA® SYSTEM

Model Number	CI1022
Medical Device Problem Code	Appropriate Device Problem Term/Code Not Available (3191)
Health Effect - Clinical Codes	Cerebrospinal Fluid Leakage (1772); Purulent Discharge (1812); Erythema (1840); Fever (1858); Drug Resistant Bacterial Infection (4553); Swelling/ Edema (4577)
Type of Reportable Event	Serious Injury
Event or Problem Description
Per the clinic, the patient developed a cerebrospinal fluid (csf) leak from the left ear and nostril two days following surgery, requiring urgent return to the operating room for a left subtotal petrosectomy and blind sac closure.In early (b)(6) 2026 (specific date not reported), the patient was admitted to the hospital (date and duration not reported) with covid-19 and high fevers, and drainage was noted at the surgical incision site.On (b)(6) 2026, cultures of the drainage were positive for mrsa, and treatment with antibiotics was initiated on (b)(6) 2026 (type and duration not reported).By (b)(6) 2026, the drainage appeared to be improving with no signs of active infection.However, worsening swelling at the implant site and erythema of the postauricular incision were observed.The patient underwent surgical washout (date not reported), which revealed copious purulent material consistent with infection at the incision site.The device was subsequently explanted on (b)(6) 2026.Reimplantation is planned but had not taken place at the time of this report.

• Brand Name: COCHLEAR¿ NUCLEUS® NEXA® COCHLEAR IMPLANT WITH SLIM STRAIGHT ELECTRODE
• Common Device Name: COCHLEAR¿ NUCLEUS® NEXA® SYSTEM
• Manufacturer (Section D): COCHLEAR LTD; 1 university avenue; macquarie university, nsw 2109 ; AS 2109
• MDR Report Key: 25388000
• Report Number: 6000034-2026-01972
• Device Sequence Number: 14750259
• Product Code: MCM
• UDI-Device Identifier: 09321502053082
• UDI-Public: (01)09321502053082(11)250924(17)270923
• Combination Product (Y/N): N
• Initial Reporter State: NY
• Initial Reporter Country: US
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2026
• 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): 06/04/2026
• Report Date (Section F): 06/04/2026

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 Model Number: CI1022
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 05/07/2026
• Was the Report Sent to FDA?: Yes
• Distributor Facility Aware Date: 05/11/2026
• Date Report to Manufacturer: 05/11/2026
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 06/04/2026
• 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; Hospitalization
• Patient Sex: Female
• Date Report Sent to FDA: 06/04/2026