There may be nitric oxide dosing fluctuations and therapy interruption when NOxBOXi Nitric Oxide Delivery System is used with certain ventilators.

http://www.fda.gov/medical-devices/medical-device-recalls-and-early-alerts/alert-noxbox-ltd-issues-correction-noxboxi-nitric-oxide-delivery-system-due-risk-nitric-oxide-dosing