The disclosure is directed to an apparatus having an adjustable ambient air-oxygen blender that adjustably mixes ambient air with an oxygen supply, especially where a size, diameter or flow rate of an orifice is mechanically adjustable so as to control a quantitative mixing function of the blender.

The present invention includes a device for hypoxia training including a breathable gas source; a mask in fluid communication with the breathable gas source; a mask-state detector that uses one or more criteria to determine if the mask is being worn by a subject, wherein the mask-state detector is capable of communicating an indication of a mask-off state or a mask-on state; a flowmeter in fluid communication with the mask and coupled to the mask-state detector; and a pressure regulator in fluid communication with the mask and with the breathable gas source, and coupled to the mask-state detector, wherein the pressure regulator sets a first pressure at the mask when the mask-state detector communicates an indication of a mask-off state or a second pressure at the mask when the mask-state detector communicates an indication of a mask-on state.

A humidifier for humidifying a flow of pressurized breathable gas to be delivered to a patient includes a dock with a device compartment configured to at least partially removably receive in a vertical direction an RPT device that is configured to supply the flow of pressurized breathable gas, and a humidification compartment fluidly connected to the device compartment, the humidification department being configured to at least partially removably receive in a vertical direction a humidification tub configured to contain a supply of water. The dock is structured to convey the flow of pressurized breathable gas through the dock from the device compartment to the humidification compartment.

A respiratory mask assembly includes a frame having a channel and a cushioning element including a clip portion adapted for interference seal and retention in the channel. The cushioning element includes an interfacing portion constructed from foam and having a wider width than the clip portion.

A respiratory interface device is provided. The respiratory interface device includes at least one elongated support member structured to contact a user. The support member has at least one conduit portion and at least one porous portion. The conduit portion is structured to allow the passage of gas therethrough. The conduit portion is structured to be in fluid communication with a pressure generating system and with the porous portion. The porous portion is structured to allow for axial passage of gas therethrough and for radial exhaust of gas therefrom.

A respiratory humidification system for providing humidification to gases that pass through a gas passage way before being provided to an airway of a patient is disclosed. The respiratory humidification system may include a liquid flow controller providing a controlled flow of liquid, a heating system including a heating surface configured to be located in a gases passage way and provide humidification to gases passing through the passage way, wherein the heating system receives the controlled flow of liquid, and one or more hardware processors providing deterministic control of a humidity level of gases passing through the gas passage way by instructing the liquid flow controller to adjust the controlled flow of liquid received at the heating system.

A gas conduit for respiratory apparatus includes a lumen for passage of a breathable gas to a patient and a flexible conduit wall surrounding the lumen. The flexible conduit wall has a humidification apparatus for delivering water vapour into the gas passing through the lumen.

A nebulizer assembly for a respiratory device is provided having a housing defining a chamber. The housing also has a nebulizer port configured to receive a nebulizer to discharge atomized medication into the chamber. An outlet of a handle is coupled to the inlet of the housing. A hose is coupled to an inlet of the handle. A patient interface is coupled to the outlet of the housing. Air flows from the hose to the patient interface via the handle and the housing. The air mixes with the atomized medication within the chamber.

Condensation or rain-out is a problem in medical circuits and previous attempts to manage and/or prevent rain-out have resulted in relatively expensive and/or difficult to manufacture medical circuit components. The subject patent provides an improved medical circuit component for managing rain-out. In particular the component may be an improved breathing tube, or insufflation system limb comprising a helically corrugated tube preferably incorporating a heater wire.

A pneumatic system (55) for an anesthesia system, includes an internal closed-circuit system (34) and with an external closed-circuit system (54). The internal closed-circuit system (34) has a flush valve assembly (49). The flush valve assembly (49) can be brought into an open state by a control unit (200) on the basis of a current tidal volume.