A patient interface, such as a nasal cannula is described. The patient interface has a body portion to be located, in-use upon a face of a user. The body portion has at least one side arm that extends laterally from a central bridge portion to be located about a user's septum region, where each side arm is connected to a resilient, or relatively more rigid, bridge portion element. The interface has at least one, and preferably a pair of, nasal prong(s). The body portion has at least one fluid passageway connected to the nasal prong(s) for supply of a gas to the nare(s) of the user's nose. A cross section of the passageway varies along the length of the body portion to regions of varying flexibility along the body portion. The bridge portion element defines a substantially predetermined spatial relationship for outlet(s) of a gas delivery system supplying gas via each side arm to the outlet(s) from which, for example, the nasal prong(s) may be provided in fluid connection. Each side arm may comprise one or more predefined or predisposed points or localised compensation regions (or sites) positioned along the side arm, or a side arm element, to accommodate or facilitate a compensation of the patient interface in or at one or more of the compensation regions (or sites).

A patient interface including a seal-forming structure having a mouth portion that forms at least part of the mouth plenum and is configured to seal around the patient's mouth and a nasal portion that is configured to seal with the patient's nares. The patient interface further includes a vent structure with a main body that is configured to be secured to the mouth portion and includes a vent wall with a plurality of vent holes, a receptacle, and a pair of anchor sockets located on opposing lateral sides of the receptacle. A cover for the vent includes a pair of anchor pegs on lateral sides of the cover. The anchor pegs are configured to be inserted into the anchor sockets to secure the cover to the main body. A diffuser is received within the receptacle between the anchor sockets and is sandwiched between the main body and the cover.

A supplemental oxygen delivery system is described in which Aerosol is delivered into a housing 10, 20, which sits in the circuit from the supplemental oxygen supply and optional humidifier. The supplemental oxygen passes through this chamber 10, 20 in which the aerosol is located, and collects the aerosol transporting it to a patient via a nasal cannula 3 or a face mask 4. An aerosol generator 9 is mounted to the housing 10, 20 and delivers aerosol into an oxygen stream 13 flowing between an inlet 14 and an outlet 15 of the housing 10. The housing 10 also has a removable plug 16 in the base 17 thereof for draining any liquid that accumulates in the housing 10. There is no disruption of oxygen delivery to patients using nasal cannulas who currently have to use a separate face-mask when receiving nebulized medication.

An oxygen concentrator comprises a product tank that is fluidly coupled to at least one sieve bed, and a product gas accumulator tank that is fluidly coupled to the product tank via a first conduit and to an outlet port via a second conduit, wherein the first conduit and the second conduit are disposed to allow at least a portion of product gas to flow from the product tank to the outlet port through the accumulator tank.

Start-up protocols for a device and method for administering NO is described.

A connector is described that may be configured to connect between a first tube and a second tube. The connector has an internal component and an external component. The external component has a first end and a second end. The first end has an external taper and an internal coupling face that may be configured to interact with the first tube and the second end may be configured to interact with the second tube. The internal component may be configured to rotate independently to the external component. The external component has a gripping region to aid the user in disconnection of the connector. An attachment mechanism may attach the second tube to the internal component.

A method of determining a duration of safe apnoea. Information is obtained relating to a respiratory indicator, and a duration of safe apnoea is determined from the obtained information. A respiratory therapy system has one or more patient interfaces. A processor is configured to determine a duration of safe apnoea based on obtained information relating to a respiratory indicator.

A portable medical ventilator using pulse flow from an oxygen concentrator to gain higher oxygen concentration includes a positive pressure source to deliver pressurized air to the patient and a negative pressure source to trigger the oxygen concentrator. A patient circuit attached to a patient interface mask connects the ventilator to the patient. The ventilator includes a controller module that is configured to generate a signal to the negative pressure device to trigger the concentrator to initiate one or more pulses of oxygen from the oxygen concentrator. The oxygen pulses are delivered to the patient interface directly through multi-tube or a multi lumen patient circuit. The oxygen does not mix with air in the ventilator or in the patient circuit and bypasses the leaks in the patient circuit and/or patient interface.

A portable oxygen delivery system including an oxygen concentrator having a housing, a compressor mounted inside the housing, a sieve module located within the housing and in fluid connection with the compressor, the sieve module containing a zeolite for removing Nitrogen from air through a pressure swing adsorption process for creating concentrated oxygen, a power source attached to the housing and an oxygen controller device for electronically controlling the pressure swing adsorption process. The portable oxygen delivery system also preferably includes a blowing apparatus fluidly connected to the oxygen concentrator having a blower housing, a blower motor mounted inside the blower housing, a blower fan connected to the blower motor, a second power source attached to the blower housing and a blower controller device for electronically controlling the blower.

A respiratory flow therapy apparatus including a sensor module can measure a flow rate of gases or gases concentration provided to a patient. The sensor module can be located after a blower and/or mixer. The sensor module can include at least an ultrasonic transmitter, a receiver, a temperature sensor, a pressure sensor, a humidity sensor and/or a flow rate sensor. The receivers can be immersed in the gases flow path. The receivers can cancel delays in the transmitters and improve accuracy of measurements of characteristics of the gases flow. The receivers can allow for detection of a fault condition in a blower motor of the apparatus.