MAUDE Adverse Event Report: NIHON KOHDEN ORANGEMED, LLC NIHON KOHDEN NKV-550 SERIES VENTILATOR SYSTEM; VENTILATOR, CONTINUOUS, FACILITY USE

Model Number	NKV-550-U
Medical Device Problem Code	Inappropriate or Unexpected Reset (2959)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	01/24/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
Evaluation completed.See attached failure investigation summary report.
Event or Problem Description
It was reported that during patient use, the ventilator¿s graphical user interface (gui) became nonresponsive to touch.The ventilator continued to deliver ventilation to the patient, and no audible or visual alarms were reported.As a precaution, the patient was transferred to another ventilator.No patient harm was reported.The hospital stated that patient demographics would not be provided per facility policy.

• Brand Name: NIHON KOHDEN NKV-550 SERIES VENTILATOR SYSTEM
• Common Device Name: VENTILATOR, CONTINUOUS, FACILITY USE
• Manufacturer (Section D): NIHON KOHDEN ORANGEMED, LLC; 1800 e. wilshire ave.; santa ana CA 92705
• Manufacturer (Section G): NIHON KOHEN ORANGEMED, LLC; 1800 e. wilshire ave.; santa ana CA 92705
• Manufacturer Contact: sheryl higgins ; 1800 e. wilshire ave.; santa ana, CA 92705 ; 949502644
• MDR Report Key: 24338892
• Report Number: 3014631252-2026-00012
• Device Sequence Number: 18589612
• Product Code: CBK
• UDI-Device Identifier: 00843685100012
• UDI-Public: (01)00843685100012(11)250605
• Combination Product (Y/N): N
• Initial Reporter Country: RP
• PMA/510(K) Number: K192307
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Y
• Reporter Type: Manufacturer
• Report Source: Company Representative
• Initial Reporter Occupation: Biomedical Engineer
• 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?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Health Professional
• Device Model Number: NKV-550-U
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 02/02/2026
• Initial Report FDA Received Date: 02/13/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 06/05/2025
• Is the Device Labeled for Single Use? (Y/N): No
• 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: Other
• Patient Sex: Unknown