A mouth cushion for a mask system includes a side wall, an undercushion extending away from the side wall, and a membrane provided to substantially surround the undercushion and adapted to form a continuous seal around an exterior of a patient's mouth in use. The side wall includes spaced-apart prong support structures that provide annular recesses adapted to support respective nasal prongs. Each prong support structure includes an alignment indicator to aid correct assembly of the respective nasal prong.

A patient interface for delivering breathable gas to a patient includes a nasal prong assembly including a pair of nasal prongs structured to sealingly communicate with nasal passages of a patient's nose in use and headgear to maintain the nasal prong assembly in a desired position on the patient's face. The headgear includes side straps and rigidizers provided to respective side straps. Each rigidizer includes a first end portion that provides a connector structured to engage a respective end of the nasal prong assembly and an inwardly curved protrusion in the form of a cheek support that curves inwardly of the connector. The cheek support is adapted to follow the contour of the patient's cheek and guide a respective end portion of the side strap into engagement with the patient's cheek to provide a stable cheek support.

A respiratory assistance component is disclosed that changes shape when an electrical charge is provided. The amount of electrical charge that is applied may be based on values, characteristics, or user controlled parameters of the respiratory assistance system. The component may be all or part of a patient interface, a tube, a flow generator, and/or a sleep mat.

A patient interface comprises a support structure and a seal-forming structure. The support structure is arranged to support the sealing portion and is configured to connect to the frame. The sealing portion comprises textile and is attached to the support structure along an outer perimeter of the sealing portion such that in use the sealing portion may be in tension due to reactive stress of the support structure and/or a resilient stretch characteristic of the textile such that the sealing portion exerts a force against the patient's face.

A positioning and stabilising structure comprising at least one gas delivery tube to receive the flow of air from a connection port on top of the patient's head and to deliver the flow of air to the entrance of the patient's airways via the seal-forming structure, the at least one gas delivery tube comprising a tube wall having an extendable concertina structure comprising a plurality of folds in the tube wall alternatingly forming a plurality of ridges and a plurality of grooves, the folds able to be at least partially unfolded to increase a separation of the ridges to elongate the extendable concertina structure; and one or more ridge connecting portions provided to the tube wall, each of the one or more ridge connecting portions connecting two or more adjacent ridges of the plurality of ridges and being configured to resist the separation of the ridges.

A respiratory mask includes a frame and a cushion module. The frame can include a front wall having a vent and/or a gas inlet opening and a collar extending away from the front wall. The collar surrounds the vent and/or the gas inlet opening. The cushion module comprises a cushion and a housing, which is made of a material more rigid than the cushion. The housing defines a connection opening. A friction coupling selectively couples the cushion module to the frame and comprises an elastomeric friction member coupled to a portion of the housing that defines the connection opening. In some arrangements, an outer surface of the friction member is exposed when the cushion module is coupled to the frame. In some arrangements, the housing extends through the peripheral surface.

A patient interface is configured to deliver breathable gas to a patient. The patient interface includes a cushion configured to form a seal with the patient's face and a frame with an elongated body comprising a central bore and a circumferential channel. The circumferential channel is configured to receive a rim of the cushion. Headgear is attachable to the frame and is configured to support the cushion and the frame on the patient's head. The headgear includes a left rigidizer attached to a left front strap and a right rigidizer attached to a right front strap. The left and right rigidizers are arranged to have different flexibilities in different directions so that a stiffness of the left and right rigidizers in a first direction resist a vertical rotation of the patient interface.

A patient interface comprising a plenum chamber configured to receive in use a flow of air at the therapeutic pressure for breathing by a patient, a seal-forming structure configured to form a seal with or around the patient's nose and/or mouth, a positioning and stabilising structure configured to hold the seal-forming structure in a sealing position, and at least one inflatable body. In one form, an inflatable body is provided to a portion of the positioning and stabilising structure. In another form the inflatable body is provided to a hoop structure. In another form, the patient interface comprises a lever arrangement, wherein an inflatable body is provided to the lever arrangement. In yet another form, the seal-forming structure comprises an inflatable body. The patient interface may be configured to limit or prevent mouth leak or mandible movement during CPAP therapy, adjust the fit of the positioning and stabilising structure on the patient's head, and/or improve the seal formed with patient's face in use.

A sealing arrangement for use in a patient interface device. The sealing arrangement includes a nasal pillow having a sealing surface structured to sealingly engage a surface of the patient at or about the airway. A first magnetic material is disposed in or the nasal pillow. A carrier member is positioned across a nose of the patient. Finally, a second magnetic material is positioned in or on carrier member. The first magnetic material and the second magnetic material magnetically interact in a manner that the sealing surface of the flexible member toward the surface of the patient responsive to the flexible member being disposed at or about the airway and the second magnetic material is disposed at a corresponding position to interact with the first magnetic material.

A shroud for a mask system includes a retaining portion structured to retain a frame, a pair of upper headgear connectors each including an elongated arm and a slot at the free end of the arm adapted to receive a headgear strap, and a pair of lower headgear connectors each adapted to attach to a headgear strap. The retaining portion, the upper headgear connectors, and the lower headgear connectors are integrally formed as a one piece structure.