A breathing assistance apparatus is disclosed, for use with delivery of respiratory gases to a patient. The breathing assistance apparatus includes a patient interface, having a body section adapted to cover the nose, or nose and mouth of a patient and a sealing interface. The sealing interface includes at least an outer sealing member. The outer sealing member is adapted to attach to the body section in a sealing manner and has a substantially thin section in at least its nasal bridge region. The thin section is substantially thinner than the rest of the outer sealing member. The patient interface comprises a mask body and a seal assembly. The seal assembly includes a flexible seal, and a rigid seal clip, the seal assembly being removably attached to the mask body via the rigid seal clip. The mask body and rigid seal clip are profiled to match the contours of a user's face so that the seal has a substantially constant wall depth.

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.

A patient interface assembly includes a frame with a central aperture by which a flow of pressurized breathable gas is introduced in use. The frame includes a wall on a central portion of the frame that surrounds the central aperture. A cushion is removably secured to the frame at the wall surrounding the central aperture and is made of a material that is relatively softer than the frame. A headgear assembly includes a pair of strap portions constructed of a flexible fabric material. A pair of yoke portions is positioned between the strap portions and the frame. Each yoke portion has a proximal end adjacent the frame and a distal end having a connector slot that connects to the respective strap portion of the headgear assembly. The yoke portions have a multilayer construction with one layer being a fabric layer. The yoke portions have a degree of flexibility in one direction and are more resistant to bending in another direction generally orthogonal to the one direction to resist vertical rotation of the patient interface assembly.

A patient interface may include: a plenum chamber having an oral portion and a nasal portion, and a positioning and stabilising structure configured to generate a force to hold the seal-forming structure on the patient's head. The plenum chamber may include: a seal-forming structure constructed and arranged to form a seal with the patient's face, said nasal portion of the seal-forming structure having at least one nasal hole, said oral portion of the seal-forming structure having an oral hole, and a shell having one or more plenum chamber inlet ports sized and structured to receive the flow of air at the therapeutic pressure for breathing by a patient throughout the patient's respiratory cycle in use, and the shell supporting the seal-forming structure.

A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and/or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.

A gas washout vent, and a patient interface with the gas washout vent, configured to allow patient-exhaled CO.sub.2 to flow to an exterior of the plenum chamber to minimise rebreathing of exhaled CO.sub.2 by the patient, the gas washout vent including at least one outlet orifice; a diffusing member at least partly covering the outlet orifice; and a blocking member having an air-impermeable material, the blocking member preventing gas exiting from the outlet orifice from flowing straight through the diffusing member.

A sealing arrangement for forming a seal between a patient's face and a patient interface device for use in delivering a flow of a treatment gas to the patient includes a generally planar substrate body having a first side and an opposite second side. The substrate body includes a main portion having an opening defined therethrough that is sized and configured to encompass the mouth and nose of the patient. The sealing arrangement further includes a first adhesive layer disposed on the first side of the substrate body and a second adhesive layer disposed on the second side of the substrate body. The first adhesive layer is sized and configured to adhere to the skin of the patient with a first adherence force and the second adhesive layer is sized and configured to adhere to a cushion of the patient interface device with a lesser second adherence force.

A sanitary extubation cover used to cover an endotracheal tube and a patient's face in order to accommodate sanitary extubation. The sanitary extubation cover includes a mask and a cover which covers the endotracheal tube. If the patient coughs, the cough would be directed into the mask and the endotracheal tube (which is covered by the cover) but contaminants from the cough would be suppressed from spreading into the open air.

A mask apparatus for a respiratory treatment can permit delivery of breathable gas to a user. In one example, the mask may employ a frame and cushion to form a seal for both mouth and nose. The frame may be adapted for coupling with a respiratory treatment apparatus so as to permit communication of a pressurized gas from the respiratory treatment apparatus. The cushion, which may be foam, may have a substantially under the nose configuration or over the nose configuration. The mask may have a common plenum chamber for both nose and mouth. The cushion may further define a centrally open lip superior region. The cushion may be adapted to couple with the frame directly or to the frame in conjunction with a cushion support clip. Various features of the cushion may further promote sealing and comfort for the under the nose design.

A patient interface (200, 300) comprising: a seal-forming structure (210, 220, 310, 320) including a face-engaging surface that is personalised to the patient's facial contour and to form a seal with the patient's face at least on or below the bridge of the patient's nose and between the patient's lower lip and on or above the patient's chin, preferably proximal to the patient's mentolabial crease, the face-engaging surface including at least one nare port (211, 311) shaped and sized to align with the patient's nares; an anterior surface (205, 305) including a connection port; wherein the seal-forming structure (210, 220, 310, 320) is non-deformable in response to headgear tension or pressurised air received within the seal-forming structure (210, 220, 310, 320).