Apparatus for direct oral delivery of fluid medical gas to a patient, comprising: a conduit, a mouthpiece in fluid communication with the conduit, an exhalant chamber at least partially divided from the conduit, an outlet valve in one-way fluid communication between the conduit and the exhalant chamber, the outlet valve adapted for permitting exhalation of exhalant by the patient into the exhalant chamber and adapted for porting of the exhalant outside of an environment in which the apparatus is adapted for use.

Disclosed is a particularly lightweight breathing mask for respiratory applications or as personal protective equipment, in which the rigid component is produced from thermoplastic films by means of high-pressure forming. The base material of the rigid component is available in a flat form and can thus be printed or coated in a variety of ways before processing; this allows properties to be introduced into the mask that would not be feasible in a conventional injection molding process. The use of film instead of injection-molded components enables a significant reduction in weight and thus an improvement in wearing comfort for the user. At the same time, the film allows a higher degree of flexibility of the rigid component during operation, enabling a better fit to the shape of the face under certain operating conditions and thus also improving wearing comfort

A hoseless CPAP system having a hoseless CPAP mask including a housing, a sealing portion extending from a back of the housing and configured to fit over a nose and mouth of a user, a fan unit provided in the housing to force air through the sealing portion to be breathed by the user, a battery provided in the housing and configured to power the fan unit, and one or more electrical contacts provided on the housing to provide charging power to the battery; and a charging base including a receiving portion configured to hold the CPAP mask therein, and one or more electrical contacts provided in the receiving portion and configured to contact the one or more electrical contacts on the CPAP mask housing to provide charging power to the battery.

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 seal-forming structure may be constructed and arranged to form a seal with a region of the patient's face surrounding an entrance to the patient's airways for sealed delivery of a flow of air at a therapeutic pressure of at least 4 cmH.sub.2O with respect to ambient air pressure throughout the patient's respiratory cycle in use. The positioning and stabilising structure may comprise a front hoop arranged to contact, in use, at least a region of the patient's head superior to an otobasion superior of the patient's head and a rear strap. The positioning and stabilising structure may comprise an adjustment mechanism for adjustment of the front hoop and the rear strap relative to the patient's head, the adjustment mechanism being arranged in a single operation to adjust both the front hoop and rear strap to enable the positioning and stabilising structure to fit different size heads.

A mask for use at an operating pressure substantially equal to atmospheric pressure includes a body with a three-dimensional shaped chamber that is configured to receive a user's mouth and nares and operate at the operating pressure. The mask also includes a nose seal portion that has an uppermost portion that contacts the user's nose along the user's sagittal plane and around at least a portion of the user's nares on an inferior side of the user's nose inferior to the user's nasal ridge. The mask also includes a positioning and stabilising structure to provide a force to hold the seal forming structure in position against the user. A portion of the positioning and stabilising structure directly contacts the user's face between the user's lip inferior and mental protuberance in use.

A patient interface includes a seal-forming structure constructed and arranged to form a seal with a region of the patients face surrounding an entrance to the patients airways. The seal-forming structure comprises a first section and a second section. The first section is constructed from a first material. The first section is configured to sealingly engage against a first region of the patients face. The second section is constructed from a second material that is different than the first material. The second section is configured to sealingly engage against a second region of the patients face. The second material is foam. The patient interface also includes a positioning and stabilising structure to provide a force to hold a seal-forming structure in a therapeutically effective position on a patient's head.

Devices, systems, and methods for detecting a sealing condition between a patient interface and a patient, and adjusting the patient interface to maintain the patient interface in sealing contact with the patient. The patient interface may include a sealing structure to form a seal on the patient, and a positioning structure to secure the sealing structure to the patient. The patient interface may include a sensor coupled to the sealing structure. A processor determines the sealing condition between the sealing structure and the patient based on a signal from the sensor, and adjusts at least one of the sealing structure and the positioning structure to maintain the sealing structure in sealing contact with the patient. A prediction system predicts a leak between the sealing structure and the patient based on the sensor signal. A learning system learns how to fit the sealing structure to the patient to form a seal.

A respiratory mask or other sealing interface can be used in combination with a nasal cannula or other unsealing interface in providing respiratory therapies for the treatment of COPD or OSA. The mask can act as a pressure vessel over the top of a nasal cannula, with the intention of increasing expiratory pressure whilst allowing the nasal cannula to provide a user with breathing gases of a high humidity and temperature. The ability to selectively apply increased expiratory pressure may be effective in reducing a user's breathing rate and thus beneficial in the treatment of respiratory distress.

A patient interface may include: a plenum chamber at least partly defining a patient interface chamber, a seal-forming structure constructed and arranged to form a seal with a region of the patient's face, at least one conduit, at least one conduit connector configured to pneumatically connect the at least one conduit to the plenum chamber to provide a flow of air at a therapeutic pressure to the patient interface chamber for breathing by the patient, and a positioning and stabilising structure to provide a force to hold the seal-forming structure on the patient's head, the positioning and stabilising structure comprising at least one tie, wherein the at least one conduit connector includes an anti-asphyxia valve configured to allow the patient to breath from ambient through their mouth in the absence of a flow of pressurised air.

According to this disclosure there is provided various embodiments of directional adjustment unit for a headgear for a respiratory mask, comprising a housing, at least one frictional engagement member arranged to be movable with respect to the housing, the at least one frictional engagement member having an aperture extending therethrough for receiving a filament of a strap of the headgear therethrough, wherein the at least one frictional engagement member in a first movable configuration provides a disengaged configuration with respect to the filament, and in a second movable configuration provides an engaged configuration with respect to the filament.

Also disclosed herein are various headgear, yoke assemblies, mask assemblies, mask frames and headgear filaments, some of which are for use with such a directional adjustment unit.