Abstract: Aspects of the present technology comprise a positioning and stabilising structure to hold a seal-forming structure in a therapeutically effective position on a head of a patient. The positioning and stabilising structure may comprise at least one gas delivery tube to deliver the flow of air to the entrance of a patient's airways via the seal-forming structure. The at least one gas delivery tube may be constructed and arranged to contact, in use, at least a region of the patient's head superior to an otobasion superior of the patient's head. The positioning and stabilising structure may comprise an adjustment mechanism for adjustment of a length of the at least one gas delivery tube to enable the positioning and stabilising structure to fit different size heads.

Abstract: Techniques of preserving annotation relationships are disclosed. The techniques are used a presentation system comprising at least one display, at least one processor coupled to the display, and a memory storing instructions, the instructions comprising instructions executable by the processor to display content on the display based on a content location, receive an annotation, group the annotation into an annotation group, determine the annotation group is related to the content based on the location of the annotation group and the content location, associate the annotation group with the content based on the determination, receive an indication of a change in the content location of the content, adjust the annotation group based on the change in the content location of the content, and display content based on the change in the content location and the adjusted annotation group.

Abstract: A presentation system capable of detecting one or more gestures and contacts on a touch sensitive display. The presentation system can displaying indicia of such contacts, such as when a user writes with a fingertip, and can remove or alter such indicia responsive to other gestures and contacts. The system can accurately distinguish between types of gestures detected, such as between a writing gesture and an erasing gesture, on both large and small touch sensitive displays, thereby obviating the need for a user to make additional selective inputs to transition from one type of gesture to another.

Abstract: A device for measuring the absolute value of the refractive index of a liquid by immersion uses the optical properties of a cylindrical waveguide with a solid core and normal angle of incidence of the light source. The device consists of a transparent tube forming the enclosure of the waveguide, impervious to the surrounding liquid and partially filled with a transparent solid or liquid material of appropriate index of refraction, a fiber optic means of inputting light via a LED or laser and fiber optic means of coupling emerging light to a photodetector. The emerging light intensity is a function of the index of refraction of the surrounding liquid.

Abstract: A humidifier comprises a water reservoir and a reservoir dock configured to receive the water reservoir in an operative position. The water reservoir is configured to hold a volume of liquid. The water reservoir includes a chamber and a single conduit providing an inner opening arranged within the chamber. The reservoir dock includes a dock inlet conduit arranged to receive the flow of air from the RPT device. The dock inlet conduit is structured and arranged to extend within the single conduit of the water reservoir when the water reservoir reaches the operative position such that the dock inlet conduit and the single conduit at least partially overlap one another.

Abstract: A fluid connector between patient interface and a respiratory therapy device and a vent adaptor for a respiratory pressure therapy system. The fluid connector comprising two parts, the first of which includes a seal and a latching portion and the second a complementary latching portion configured to engage the former to provide a fluid flow patch between the two parts. The vent adaptor comprising a vent assembly comprising a vent housing and an annular plate including an array of holes to discharge the pressurised gas to atmosphere and an deformable membrane which presses against the annular plate.

Abstract: A process for making nanoparticles of biocompatible materials is described, wherein an aqueous reaction mixture comprising cerous ion, citric acid and ethylenediaminetetraacetic acid in a predetermined ratio, an oxidant, and water is provided along with temperature conditions to directly form, without isolation, a stable dispersion of cerium oxide nanoparticles. These biocompatible cerium oxide nanoparticles may be used to prevent and/or treat oxidative stress related diseases, such as stroke, relapse/remitting multiple sclerosis, chronic-progressive multiple sclerosis, amyotrophic lateral sclerosis, and ischemic reperfusion injury.

Abstract: A process for making nanoparticles of biocompatible materials is described, wherein an aqueous reaction mixture comprising cerous ion, citric acid and ethylenediaminetetraacetic acid in a predetermined ratio, an oxidant, and water is provided along with temperature conditions to directly form, without isolation, a stable dispersion of cerium oxide nanoparticles. These biocompatible cerium oxide nanoparticles may be used to prevent and/or treat oxidative stress related diseases, such as stroke, relapse/remitting multiple sclerosis, chronic-progressive multiple sclerosis, amyotrophic lateral sclerosis, and ischemic reperfusion injury.

Abstract: An apparatus for humidifying a flow of pressurised, breathable air includes varying a first pressure of the flow of breathable gas to vary a level of thermal engagement between the conductive portion of the reservoir and the heater plate, varying a height of the variable portion varies a level of thermal engagement between the conductive portion of the reservoir and the heater plate, use of a humidifier reservoir base component with a maximum water capacity substantially equal to the predetermined maximum volume of water of the humidifier reservoir or the use of intersecting inlet and outlet axes.

Abstract: One form of the present technology includes a fluid connector for delivery of breathing gas to a patient from a respiratory pressure therapy device, the fluid connector including a first end with a first opening to deliver a fluid flow, a seal portion extending around a periphery of the first opening, and a latching portion, a second end with a second opening to receive the fluid flow, a sealing surface extending around a periphery of the second opening and configured to engage the seal portion to form a face seal, and a complementary latching portion configured to engage with the latching portion

Abstract: A device for measuring the absolute value of the refractive index of a liquid by immersion uses the optical properties of a cylindrical waveguide with a solid core and normal angle of incidence of the light source. The device consists of a transparent tube forming the enclosure of the waveguide, impervious to the surrounding liquid and partially filled with a transparent solid or liquid material of appropriate index of refraction, a fiber optic means of inputting light via a LED or laser and fiber optic means of coupling emerging light to a photodetector. The emerging light intensity is a function of the index of refraction of the surrounding liquid.

Abstract: An apparatus for humidifying a flow of pressurized, breathable air includes varying a first pressure of the flow of breathable gas to vary a level of thermal engagement between the conductive portion of the reservoir and the heater plate, varying a height of the variable portion varies a level of thermal engagement between the conductive portion of the reservoir and the heater plate, use of a humidifier reservoir base component with a maximum water capacity substantially equal to the predetermined maximum volume of water of the humidifier reservoir or the use of intersecting inlet and outlet axes.

Abstract: A flow interrupter for gas flow delivered by a delivery conduit in a respiratory treatment system permits temporary interruption of flow in the conduit. Typically, the apparatus has a passage to conduct a breathable gas. The passage traverses through a flexible wall such as a stretchable sleeve. The flexible wall may include a first and second ends. A manipulator may be attached to the flexible wall. The flexible wall sleeve may be adapted to twistably collapse between the first and second ends so as to reduce the passage of the channel by operation of the manipulator. The flow interrupter may be formed with a swivel and operation of the sleeve may be implemented by rotation of the swivel. Sufficient rotation of such a swivel may form a vortex closure of material to close the channel. Release of the manipulator may then permit unwinding of the vortex closure, re-opening the channel.

Abstract: An air delivery conduit includes first and second conduit portions that cooperate to form the conduit, each conduit portion including an inner layer of a film laminate that forms an interior surface of the conduit and an outer layer of a textile that forms an exterior surface of the conduit.

Abstract: An air delivery conduit (620) includes first (621) and second (622) conduit portions that cooperate to form the conduit, each conduit portion including an inner layer of a film laminate (650) that forms an interior surface of the conduit and an outer layer of a textile (655) that forms an exterior surface of the conduit.