A method for controlling oxygen mix for a single-limb non-invasive ventilator comprising a pressure controller, and both a blower and a pressurized oxygen source downstream of the blower, each comprising a controller and a flow valve controlling flow, comprising: (i) generating a flow trajectory; (ii) providing the generated flow trajectory to a pair of complimentary flow coupling filters comprising a blower flow coupling filter and an oxygen flow coupling filter; (iii) generating an output from each of the filters, comprising an input flow trajectory for the blower flow controller and an input flow trajectory for the oxygen flow controller; and (iv) adjusting, by the blower flow controller and/or oxygen flow controller based on the input flow trajectory, target pressure, and oxygen mix, the blower speed controller and/or the pressurized oxygen source proportional flow valve.

A nasal cannula interface is provided for supplying a gases flow to a patient comprising: a nasal cannula defining at least a portion of a gases flow path and comprising a body having a base portion and at least one prong extending from the base portion, the at least one prong being configured to direct the gases flow to an orifice of the patient, and one or more sensors configured to measure a parameter. The one or more sensors may comprise a pulse oximeter. The one or more sensors may be mounted on the nasal cannula body, or headgear to which the body is connector. The one or more sensors may be configured to be in contact with the face of the patient, and may be configured to be mounted in and/or substantially flush with, a cheek contacting portion of the interface.

An installation for supplying gas to a patient, comprises an NO delivery device, an NO injection line with a valve device, a backup line that connects to the injection line and comprises a backup solenoid valve and a flow rate control device, and control means; and a medical ventilator that supplies a respiratory gas to a patient circuit to which the NO delivery device is connected. A flow rate sensor supplies the control means with a measurement signal of the gas flow rate in the patient circuit. In the event of interruption of reception of the measurement signal, the backup solenoid valve switches to an open position, the valve device switches to a closed position and the flow rate control device supplies the NO/N.sub.2 mixture at a pre-regulated backup flow rate, determined on the basis of the measurement signal supplied by the flow rate sensor, before said interruption.

The present disclosure relates to a breathing assistance apparatus for providing a breathing assistance to a user. The breathing assistance apparatus includes a first/second source configured with a first/second buffer. The first/second fluid is controllably transferred from the first/second source to the first/second buffer using any or combination of a first/second pressure regulators and one or more first/second valves. A mixing chamber configured with the first buffer and the second buffer to receive and mix the first fluid and the second fluid. A delivery tank configured with the mixing tank to controllably receive the third fluid through one or more fourth valves and a third pressure regulator. A user feed mask having an inlet configured with the delivery tank and user's face facilitating breathing assistance to the user.

Provided is a method that includes automatically providing air/oxygen at a pre-selected maximum pressure limit, breath volume and respiratory-rate. The pre-selected maximum pressure limit, breath volume, and respiratory-rate are automatically set as a function of a size of a mask coupled to an air/oxygen supply system. Further provided is a ventilator system that includes a ventilator mask, a ventilator supply system, and a mask conduit. The ventilator mask is configured in a size that will fit upon a selected range of sizes of human faces. The ventilator supply system includes an air/oxygen source and an air/oxygen regulator system configured to regulate air/oxygen flow parameters as a function of the size of the mask. The mask conduit is configured to couple the ventilator supply to the ventilator mask.

A water tank mounting structure and a ventilation treatment apparatus is provided. The water tank mounting structure comprises a cavity for containing a water tank, a back wall for defining the cavity, at least one side wall for defining the cavity, and a guiding assembly for guiding the water tank to assemble to the cavity. The back wall is provided with at least one opening for transmitting a respiratory gas between a main unit of the ventilation treatment apparatus and the water tank. The guiding assembly is set such that when the water tank is assembled into the cavity, at least one gas port of the water tank is aligned to the at least one opening of the back wall. The guiding assembly includes at least one first guiding component provided on the back wall and a second guiding component provided on the at least one side wall.

A manifold assembly for a surgical gas delivery system is disclosed, which includes a manifold body including an inlet port for receiving gas from an outlet side of a compressor and an outlet port for recirculating gas to an inlet side of the compressor, a bypass valve communicating with the inlet port and the outlet port of the manifold body, an air ventilation valve for dynamically controlling the ingress of air from atmosphere, a smoke evacuation valve for dynamically controlling the egress of gas from the manifold assembly when the gas delivery system is operating in a smoke evacuation mode, and a gas fill for dynamically controlling the receipt of gas from a source of surgical gas.

Oscillatory ventilator configured for oscillating at a plurality of specifically tuned sinusoidal frequencies simultaneously a ventilation gas for delivery to a lung region of a patient and a ventilator control system, in communication with the oscillatory ventilator, to control a sinusoidal waveform input for the oscillatory ventilator, wherein the sinusoidal waveform input comprises the plurality of specifically tuned sinusoidal frequencies each of which sinusoidal frequencies are below the acoustic range.

Described are methods and devices for therapeutic or medical gas delivery that utilize at least one proportional control valve and at least one binary control valve. The proportional control valve may be in series with the binary control valve to provide a valve combination capable of pulsing therapeutic gas at different flow rates, depending on the setting of the proportional control valve. Alternatively, the proportional control valve and binary control valve may be in parallel flow paths.

The invention concerns a gas mixer (1) that is adapted for providing a gas mixture to a mechanical ventilator, comprising a mixing vessel (53), a first line (10) for providing a first gas, a second line (20) for providing a second gas and a third line (30) for providing a third gas, said first, second and third lines (10, 20, 30) being in fluid communication with the mixing vessel (53) for proving said first, second and third gases to said mixing vessel (53) and obtaining a gas mixture in said mixing vessel (53), and a delivery line (60) in fluid communication with the mixing vessel (53) for recovering at least a part of the gas mixture contained in the mixing vessel (53).