Abstract: A nitric oxide delivery system can include a cassette which is a single use disposable component used to store liquid N2O4 activate upon operator demand, convert N2O4 to NO2 via a heating element(s) controlled by a console to deliver NO2 at a controlled flow rate, direct concentrated NO2 to a contained pair of conversion cartridges and exhaust NO gas to the console for delivery to the patient.

Abstract: A metering device for delivering a fluid at a predetermined rate and a mixing device for delivering first and second fluids at a predetermined rate mixed in a predetermined ratio. The devices include a flexible fluid bladder having flexible inlet and outlet conduits, a flexible inlet conduit clamp tube overlying the inlet conduit, and a flexible outlet conduit clamp tube overlying the outlet conduit, all of which are positioned between a pair of abutting rigid plates having matching voids. As each of the clamp tubes are pressurized, the inlet or outlet conduits over which they lie are collapsed to prevent fluid flow therethrough. A valve system is provided for alternating between a fill cycle wherein the outlet conduit clamp tube is pressurized and the inlet conduit clamp tube is depressurized to allow fluid to flow into the fluid bladder, and a discharge cycle wherein the inlet conduit clamp tube is pressurized and the outlet conduit clamp tube is depressurized to allow fluid to flow from the fluid bladder.