MAUDE Adverse Event Report: NOXBOX LTD NOXBOXI NITRIC OXIDE DELIVERY SYSTEM

Model Number	NOXBOX-I
Medical Device Problem Code	Gas Output Problem (1266)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	02/22/2026
Type of Reportable Event	Malfunction
Event or Problem Description
(e1) reported that while delivering inhaled nitric oxide (ino) therapy to a neonatal patient using the (d4) device, fluctuations in the monitored nitric oxide concentration were observed.According to the hospital report, the displayed nitric oxide concentration fluctuated between approximately 0-45 ppm on a target dose of 20 ppm.No patient harm or lasting adverse effects were reported.Ventilator mode and support: anesthesia machine.
Additional Manufacturer Narrative
The device was returned to the u.S.Service center for evaluation and underwent a comprehensive functional inspection and performance verification.All testing was performed in accordance with approved service and test procedures.Upon arrival, the device met all manufacturer specifications for nitric oxide delivery, monitoring performance, and overall functionality.No faults or out-of-specification conditions were identified during the evaluation.As part of the investigation, the device's log file was reviewed.The log data did not identify a definitive cause for the observed fluctuations.Based on the limited information available from the hospital and the results of the device evaluation, a definitive root cause for the reported event could not be determined.No device malfunctions or manufacturing defects were identified.A review of complaint history for this type of event indicated that the occurrence rate remains within established control limits.

• Brand Name: NOXBOXI NITRIC OXIDE DELIVERY SYSTEM
• Common Device Name: NOXBOXI
• Manufacturer (Section D): NOXBOX LTD; 1 eurolink gateway; castle road; sirringbourne, kent ME103 AG; UK ME103AG
• Manufacturer (Section G): NOXBOX LTD; 1 eurolink gateway; castle road; sittingbourne, kent ME10 3AG; UK ME10 3AG
• Manufacturer Contact: karen ring ; 1 eurolink gateway; castle road; sittingbourne, kent ME103-AG ; UK ME103AG
• MDR Report Key: 24729573
• Report Number: 3012796317-2026-00029
• Device Sequence Number: 10421679
• Product Code: MRN
• UDI-Device Identifier: 05060541640009
• UDI-Public: (01)05060541640009
• Combination Product (Y/N): N
• Initial Reporter State: OH
• Initial Reporter Country: US
• PMA/510(K) Number: K233251
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Y
• Reporter Type: Manufacturer
• Report Source: User Facility,Distributor
• Initial Reporter Occupation: Other Health Care Professional
• Remedial Action: Replace
• Type of Report: Initial
• Report Date (Section B): 03/30/2026

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: NOXBOX-I
• Device Catalogue Number: REQNOXBOX-I
• Was Device Available for Evaluation?: Yes
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 02/27/2026
• Initial Report FDA Received Date: 03/30/2026
• Date Device Manufactured: 01/01/2022
• 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
• Usage of Device: Reuse
• Patient Sequence Number: 1
• Concomitant Medical Products and Therapy/Usage Dates: NOXIVENT
• Patient Sex: Unknown