NZ760726B2 - Nasal Mask System - Google Patents

Abstract

patient interface for delivering a flow of air at a positive pressure to a patient during sleep, including a cushion assembly, an air conduit (133) comprising a stretchable tube structured to twist when stretched and a decoupling system including first, second and third decoupling structures to decouple tube drag forces as a patient twists and turns. The second decoupling structure includes a ring (128) and elbow (135) with partially spherical contact surfaces which form an airtight ball and socket joint. couple tube drag forces as a patient twists and turns. The second decoupling structure includes a ring (128) and elbow (135) with partially spherical contact surfaces which form an airtight ball and socket joint.

Description

NASAL MASK SYSTEM 1 CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of U.S. Provisional Application No. 61/648,807, filed May 18, 2012, which is incorporated herein by reference in its entirety. 2 BACKGROUND OF TECHNOLOGY 2.1 (1) FIELD OF TECHNOLOGY relates to treatment of respiratory disorders, and to The present technology procedures to prevent respiratory disorders. In particular, the present technology relates to medical devices, and their use for treating respiratory disorders and for preventing respiratory the present technology relates to disorders. More particularly, a nasal mask system used for treatment, e.g., of Sleep Disordered Breathing (SDB) with Continuous Airway or Non-Invasive Positive Pressure Positive Pressure (CPAP) Ventilation (NIPPV).

The technology also relates to apparatus to deliver breathable gas to a present patient including a positive airway pressure (PAP) device, an air delivery conduit or patient's face in use to tube, and a patient interface. The patient interface contacts the gas to the patient from the PAP device. deliver pressurized breathable 2.2 (2) DESCRIPTION OF THE RELATED The respiratory system of the body facilitates gas exchange. The nose and mouth form the entrance to the airways of a patient. narrower, The airways consist of a series of branching tubes, which become lung. The prime function shorter and more numerous as they penetrate deeper into the oxygen to move from the air into the venous of the lung is gas exchange, allowing and left main blood and carbon dioxide to move out. The trachea divides into right The bronchi make bronchi, which further divide eventually into terminal bronchioles. divisions of up the conducting airways, and do not take part in gas exchange. Further the airways lead to the respiratory bronchioles, and eventually to the alveoli.

RECTIFIED SHEET (RULE 91) ISA/AU alveolated region of the lung is where the gas exchange takes place, and is referred to as the respiratory zone. See West, Respiratory Physiology- the essentials.

A range of respiratory disorders exist. 100071 Obstructive Sleep Apnoea (OSA), a form of Sleep Disordered Breathing (SDB), is characterized by occlusion of the upper air passage during sleep. It results from a combination of an abnormally small upper airway and the normal loss of muscle tone in the region of the tongue, soft palate and posterior oropharyngeal wall during sleep. The condition causes the affected patient to stop breathing for periods It often typically of 30 to 120 seconds duration, sometimes 200 to 300 times per night.

Causes excessive daytime somnolence, and it may cause cardiovascular disease and brain damage. The syndrome is a common disorder, particularly in middle aged a person overweight males, although affected may have no awareness of the problem.

See US Patent 4,944,310 (Sullivan).

Cheyne-Stokes Respiration (CSR) is a disorder of a patient's respiratory controller in which there are rhythmic alternating periods of waxing and waning ventilation, causing repetitive de-oxygenation and re-oxygenation of the arterial blood. It is possible that CSR is harmful because of the repetitive hypoxia. In some patients CSR is associated with repetitive arousal from sleep, which causes severe activity, and increased afterload. See US sleep disruption, increased sympathetic Patent 6,532,959 (Berthon-Jones).

Obesity Hyperventilation Syndrome (OHS) is defined as the combination of of other known causes severe obesity and awake chronic hypercapnia, in the absence and excessive for hypoventilation. Symptoms include dyspnea, morning headache daytime sleepiness.

Chronic Obstructive Pulmonary Disease (COPD) encompasses any of in common. These a group of lower airway diseases that have certain characteristics include increased resistance to air movement, extended expiratory phase of of COPD are respiration, and loss of the normal elasticity of the lung. Examples and COPD tobacco smoking emphysema chronic bronchitis. is caused by chronic RECTIFIED SHEET (RULE 91) ISA/AU (primary risk factor), occupational exposures, air pollution and genetic factors.

Symptoms production. include: dyspnoea on exertion, chronic cough and sputum Disease (NMD) is a broad term that encompasses Neuromuscular many diseases and ailments that impair the functioning of the muscles either directly via intrinsic indirectly via nerve patients muscle pathology, or pathology. Some NMD are characterised by progressive muscular impairment leading to loss of ambulation, being wheelchair-bound, swallowing difficulties, respiratory muscle weakness and, eventually, death from respiratory failure. Neuromuscular disorders can be divided into rapidly progressive and slowly progressive: (1) Rapidly progressive disorders: Characterised by muscle impairment that worsens over months and results in death within a few years (e.g. Amyotrophic lateral sclerosis (ALS) and Duchenne muscular dystrophy (DMD) in teenagers); (ii) Variable or slowly progressive disorders: Characterised by muscle impairment that worsens over years and only mildly reduces life expectancy (e.g. Limb girdle, Facioscapulohumeral and Myotonic muscular dystrophy). Symptoms of respiratory failure in NMD include: increasing generalised weakness, dysphagia, dyspnoea on exertion and at rest, fatigue, sleepiness, morning headache, and difficulties with concentration and mood changes.

Chest wall disorders are a group of thoracic deformities that result in inefficient coupling between the respiratory muscles and the thoracic cage. The by a restrictive defect and share the potential of disorders are usually characterised respiratory failure. Scoliosis and/or kyphoscoliosis may cause long term hypercapnic respiratory failure. Symptoms of respiratory failure include: dyspnoea on severe exertion, peripheral oedema, orthopnoea, repeated chest infections, morning headaches, fatigue, poor sleep quality and loss of appetite.

Otherwise healthy individuals may take advantage of systems and devices to prevent respiratory disorders from arising.

Systems 2.2.1 is the 1000141 One known product used for treating sleep disordered breathing S9 Sleep Therapy System, manufactured by ResMed.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 2.2.2 Therapy Nasal Continuous Positive Airway Pressure (CPAP) therapy has been used to treat Obstructive Sleep Apnea (OSA). The hypothesis is that continuous positive airway pressure acts as a pneumatic splint and may prevent upper airway occlusion by pushing the soft palate and tongue forward and away from the posterior oropharyngeal wall.

Non-invasive ventilation (NIV) has been used to treat OHS, COPD, NMD and Chest Wall disorders. 2.2.3 Patient Interface The application of a supply of air at positive pressure to the entrance of the airways of a patient, e.g., while a patient sleeps, is facilitated by the use of a patient interface, such as a nasal mask, full-face mask or nasal pillows.

Known patient interface devices suffer from being one or more of obtrusive, aesthetically undesirable, poorly fitting, difficult to use and uncomfortable, especially when worn for long periods of time or when a patient is unfamiliar with a system. 2.2.3.1 Seal-forming portion Patient interfaces typically include a seal-forming portion.

A range of patient interface seal-forming portion technologies are disclosed in the following patent applications, assigned to ResMed Limited: WO 1998/004,310; ,513; ,785. 2.2.3.2 Positioning and stabilising A seal-forming portion, of a patient interface used for positive is subject to the corresponding force of the air pressure to disrupt a pressure therapy a variety of have been the seal-forming portion, seal. Thus techniques used to position and to maintain it in sealing relation with the appropriate portion of the face.

One technique is the use of adhesives. See for example US Patent publication US 2010/0000534.

RECTIFIED SHEET (RULE 91) ISA/AU Another technique is the use of one or more straps and stabilising harnesses. 2.2.3.3 Vent technologies Some forms of patient interface systems may include a vent to allow the washout of exhaled carbon dioxide. a number of mask vent technologies.

Res Med Limited has developed See ,665; ,381; US 6,581,594; US Patent Application; US 2009/0050156; US Patent Application 2009/0044808. 3 BRIEF SUMMARY OF TECHNOLOGY An aspect of the present technology relates to an elbow and a connector deliver the assembly adapted to receive gases from a flow generator and gases to a patient interface.

An aspect of the present technology relates to an elbow and a connector adapted to vent gases from a patient interface. functions in one As aspect of the present technology is to have multiple part or component and/or manufactured together, e.g., quick release button(s)/member(s)/actuator(s), baffle and swivel all formed together, so patient is costs. not required to disassemble; this may increase potential for reduced overall part technology relates to a multi-axis elbow An aspect of the present in two separate planes while assembly that allows movement of a connected tube substantially isolating drag forces from the tube.

Another aspect of the present technology relates to a method for manufacturing an elbow for a patient interface assembly, comprising providing a and adapted air flow skeleton, e.g., of rigid or semi-rigid material to communicate under pressure between an air delivery conduit and a mask; separately molding valve a pull tab; and assembling the skeleton and the AAV anti-asphyxia (AAV) with the pull tab the skeleton in the skeleton by pulling from inside and through an opening to position, retain and/or the AAV relative method may seal to the skeleton. The RECTIFIED SHEET (RULE 91) ISA/AU include removing at least a portion of the pull tab once pulled through such that an outer flange of the AAV sits flush with an exterior elbow surface. The method may further providing a flexible component AAV in position. The comprise to secure the flexible component may form one or more release buttons or actuators on the elbow.

Another aspect of the present technology relates to an elbow for a patient comprising.a or frame, e.g., of rigid or semi-rigid interface assembly, skeleton between an air delivery material, and adapted to communicate air flow under pressure conduit valve (AAV) tab, whereby and a mask; an anti-asphyxia with a pull to assembly the AAV to the skeleton, the pull tab is inserted or guided inside the an opening in the skeleton to position, retain and/or seal skeleton and pulled through of the AAV, the AAV relative to the skeleton. At least a portion of an outer flange once the pull tab is pulled through, sits flush with an exterior elbow surface. The elbow may AAV in position and/or to form include a flexible component to secure the one or more release buttons or actuators on the elbow, the release buttons adapted to remove the elbow from a frame.

Another aspect of the technology relates to a swivel elbow and connector assembly for a patient interface for delivering pressurized breathable gas to from a PAP device. According to one aspect, the swivel elbow and a patient connector assembly is connected to a flexible patient interface structure, e.g. a to another cushion, through in the patient interface structure. According an aperture example a aspect, the swivel elbow and connector assembly includes a connector, for the patient interface structure at the ring, which is attachable to and-detachable from of slots for venting gases from the aperture. The connector includes a plurality of the patient interface interior of the patient interface structure to the exterior structure. to a swivel elbow Yet another aspect of the technology relates between the ring and connected to the connector and slots to permit venting of gases the swivel elbow. According to another aspect, the swivel elbow is connected to the the patient connector and the slots permit venting of gases between the connector and the connector and the interface structure, e.g. cushion, and no venting occurs between swivel elbow.

RECTIFIED SHEET (RULE 91) ISA/AU A further aspect of the technology anti- relates to a swivel elbow and asphyxia valve assembly having a diffuse vent. A still further of the aspect technology relates to a swivel elbow and anti-asphyxia valve assembly having a diffuse vent that may be molded in one piece. An even further aspect of the technology relates elbow and to a swivel anti-asphyxia valve assembly having a diffuse vent that may have engagement portions that, when pressed, permit engagement and disengagement of the swivel elbow and anti-asphyxia valve assembly from a patient interface, e.g. a mask.

According elbow and to an example of the technology, a swivel connector assembly for a patient interface system comprises a ring configured to be sealingly secured in an aperture of the patient interface system, the ring including a first side in an interior of the patient interface system and a second side at an exterior of the patient interface system when the ring is secured in the aperture, the ring comprising a plurality of vents configured to permit flow of gases from the interior to the exterior of the patient interface system; and an elbow swivelably in the secured ring. The ring comprises a first flange on the first side and a second flange on the second side, the first and second flanges defining a channel that sealingly engages the comprises an angled aperture of the patient interface system and the second flange surface that directs the flow of gases from the plurality of vents at an angle to the longitudinal axis of the ring. to another example of the technology, a patient interface According system for delivering a flow of breathable gas to a user comprises a patient interface to sealingly engage the face of the user, the patient interface structure configured structure comprising an aperture; and a swivel elbow and connector assembly as disclosed herein.

According to another example of the technology, an elbow a second delivering gases to a patient interface comprises a first connecting portion, connecting portion and a venting portion. The first connecting portion is adapted receive a tube connection, the second connecting portion is adapted to receive patient interface assembly, and the venting portion is proximal to the second connecting portion. The venting portion may be diffused about the perimeter of the RECTIFIED SHEET (RULE 91) ISA/AU second connecting portion. The elbow may further comprise a baffle to separate the venting portion from an incoming air stream from the first connecting portion. 1000381 According to still another example of the technology, a swivel elbow anti-asphyxia valve assembly for a patient interface assembly comprises a first component including a first connection portion configured to be sealingly secured in an aperture of the patient interface system, a second connection portion configured to be connected to a swivel or a delivery conduit, one or more first supports between the first connection portion and the second connection portion, and a first aperture and a second aperture are provided between the one or more first supports; and a second component including a valve member, engagement members, and a flexible member, the valve member being between the one or more first supports of the first component and movable between a first position in which the valve member occludes the first aperture and a second position in which the valve member does first not occlude the aperture, the engagement members being configured one or more first to engage the supports when pressed by a user of the patient interface system, and the flexible member being connected to the engagement members and sealing the second aperture.

Another aspect of the present technology is directed towards providing medical devices used in the diagnosis, treatment or prevention of respiratory disorders having one or more of improved comfort, cost, efficacy, ease of use and manufacturability.

Another aspect of the present technology relates to apparatus used in diagnosis, treatment or prevention of a respiratory disorder. used in Another aspect of the present technology relates to methods diagnosis, treatment or prevention of a respiratory disorder. one or One aspect of the present technology is a patient interface that is more of comfortable, effective, simple to use, unobtrusive and with a wide fit range.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 An aspect of one form of the present technology is a patient interface that avoids a jetting effect of nasal pillows or prongs, and/or a feeling of discomfort from locating a portion of a mask within a nasal cavity of a patient.

An aspect of one form of the present technology is a nasal mask that is easy to put on, and may avoid a need for headgear straps to interfere with, or cross the ears in use, and may avoid interfering or crossing the ears while putting on or removing.

Another aspect of one form of the present technology is a method of putting on or removing a mask. [00046J In one form of the present technology, a small, unobtrusive nasal mask is provided.

In one form of the present technology, a nasal mask is provided that does not form a seal on a lower lip, or a chin of a patient. 1000481 In one form of the present technology, a patient interface is provided that does not exert a rearward force on the mandible, e.g. the patient interface does not push on the mandible from the anterior towards the posterior.

In one form of the present technology, a patient interface is provided that does not comprise a rigid shell or rigid frame.

In one form of the present technology, a patient interface is provided that comprises a plenum chamber constructed from a flexible or semi-rigid material, for example a flexible rubber of a suitable thickness (e.g. silicone with a type A hardness in the range of about 35 to about 45, and about 1.5mm to about 3mm thick).

In one form of the technology, a nasal mask is provided that does not require engagement or disengagement of a clip to don or remove the mask.

An aspect of one form of the present technology is a patient interface comprising a seal-forming portion having a first sealing region that is constructed to have little nor no resistance to compression, and a second region sealing that is constructed to substantially resist a compressive force (e.g. as a result of headgear RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 tension). in use, the first sealing region is arranged to overlay a portion In an example of the of the nose, sealing region is arranged cartilaginous framework and the second to overlay region bone region of the a portion of a bone the face. In an example, the face is a region adjacent the ala, and optionally adjacent to the alar crest point.

According to one form of the present technology, a patient interface is provided that comprises: (i) a seal-forming portion that in use overlays at least part of a top lip framework of the region of a patient's face, and a portion of the cartilaginous nose; and (ii) a seal positioning and stabilising structure that may be donned and removed without interfering with the ears of the patient. 1000541 Another aspect of one form of the present technology is a patient interface having a seal-forming portion associated with a two point connection with a seal positioning and stabilising structure. In an example, the patient interface does not comprise a forehead support. In an additional or alternative example, the seal positioning and stabilising structure comprises a non-rigid or flexing connection element.

Another aspect of one form of the present technology is a patient interface that is moulded or otherwise constructed with a clearly defined perimeter shape which is intended to match that of an intended wearer in use. 1000561 Another aspect of one form of the present technology is a patient interface that is constructed and arranged so that while forming a seal on at least part of the cartilaginous framework of the nose, it avoids or reduces a tendency to restrict nasal air flow therethrough.

According to one form of the present technology, a patient interface provided that comprises a first superior sealing portion that in use overlays a portion sealing portion that of the cartilaginous framework of the nose, and a second inferior a relatively larger in use overlays a portion of the upper lip and wherein in use, portion of a headgear sealing force is directed towards the portion of the upper lip and the underlying maxilla, teeth or gum than is directed towards the cartilaginous framework of the nose.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 Another aspect of one form of the present technology is a patient interface that is constructed and arranged to avoid or reduce a tendency to put unnecessary pressure on the nasal septum.

According to one form of the present technology, a patient interface provided that in use forms a seal on a portion of an upper lip of a patient, and which comprises a plenum chamber having a wall and wherein a first portion of the wall that is constructed to be located adjacent the septum in use has a relatively less stiff spring constant that portions of the wall that are adjacent to said first portion.

Another aspect of one form of the present technology is a patient interface that while forming a seal on a portion of the cartilaginous framework of the nose, provides an effective or improved seal on the region of the nose near a junction between the greater alar cartilage and the lateral cartilage.

According to one form of the present technology, a patient interface is provided that comprises a sealing flange that defines or three a generally T-shaped, lobed orifice. In an example, the sealing flange includes a membrane and a sealing flap that protrudes from the edge of the membrane along its inner perimeter in each side of nose region. The edge of the membrane along its inner perimeter along with the edge of each sealing flap along its inner perimeter cooperate to define an orifice T-shape, or into the plenum chamber. In an example, such orifice includes a general three lobed orifice, including an upper orifice portion (along vertical axis v as viewed in Fig. 3-20) and a lower orifice portion (along horizontal axis h as viewed in Fig. 3- that extends generally transverse to the upper orifice portion.

According to one form of the present technology, an inner edge of a sealing flange is spring biased towards the face of a wearer in use, e.g. with respect a middle portion of the sealing flange. one form of the present technology is a nasal mask Another aspect of that is constructed and arrange to pivot or rotate about a top lip region upon of a adjustment headgear tension.

RECTIFIED SHEET (RULE 91) ISA/AU Another aspect of one form of the present technology is a method of manufacturing a patient interface.

Another aspect of one form for of the present technology is a device preventing, treating or ameliorating one or more of OSA, CSA, OHS, COPD, NMD and chest-wall disorders. [000661 Another aspect of the present technology is a mask system that can accommodate a wide range of different facial shapes including faces with high and nose bridge regions, and narrow and wide noses. Another aspect of the present technology is a mask system with a wide fit range.

Another aspect of one form of the present technology is a mask system that is small and unobtrusive, and yet is stable on the face while a patient is sleeping. [000681 One aspect of the present technology is a mask that is constructed and arranged to seal at its upper extent on a region of the nose that is generally above or superior to the pronasale, or tip of the nose.

One aspect of one form of the present technology is a mask that is constructed and arranged to seal at its upper extent at locations that are generally below or inferior to the nasal bones.

In one form of the present technology, a mask is provided that is constructed and arranged to have a seal forming portion that overlays a portion of the upper or superior lip, and that overlays a portion of the cartilaginous framework of the nose, e.g., without overlaying the nasal bones.

In one form of the present technology a mask is provided that is constructed and arranged to have a first seal forming portion that overlays a portion of the the upper or superior lip, and a second seal-forming portion that overlays cartilaginous framework of the nose, e.g., without overlaying the nasal bones.

In one form of the present technology a mask is provided that is constructed and arranged to have a first seal forming portion that is substantially in RECTIFIED SHEET (RULE 91) ISA/AU compression, or subject to bending forces in use, and a second seal-forming portion that is substantially in tension in use.

In one form of the present technology a mask is provided that is constructed and arranged to have a first seal forming portion that is relatively stiff before use, and a second seal-forming portion that is relatively floppy before use.

Another aspect of one form of the present technology is a mask system with an improved sealing cuff. In an example, the mask system includes a facial flap comprising a relatively thin member formed of a flexible, e.g., and at least semi- resilient, material.

In an example, the mask system further comprises, in at least some regions, a back-up band.

Another aspect of the present technology is a mask that is formed, moulded or otherwise constructed with a clearly defined perimeter shape which is intended to match that of an intended wearer.

A further aspect of the present technology is a cushion for a mask that seals at its upper extent in a region of the nose that is generally superior to or above the pronasale or tip of the nose,.and extends across the alar or flares of the patient's nose.

A further aspect of the present technology is a cushion for a mask that seals at its upper extent in a region of the nose that is generally superior to or above the pronasale or tip of the nose, and extends across the alar or flares of the patient's nose, e.g., not extending over or across the nasal bones of the patient's nose.

One aspect of one form of the present technology is a cushion for a mask that seals at its upper extent in a region of the nose that is generally close to the junction between bone and people with larger noses, and which cartilage on a range of avoids impinging on the sight of people with smaller noses.

In one form of the present technology, a mask system is provided that does not require a rigid frame or skeleton, and which seals at its upper extent in a the nose region of that is generally above or superior to the pronasale, or tip of the nose.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 [00080J One aspect of the present technology is a cushion for a mask that includes a sealing membrane and a backup band or undercushion, in at least some regions. [000811 Another aspect of the present technology is a cushion for a nasal mask that includes an undercushion or backup band in the region of the top lip. [000821 Another aspect of one form of the present technology is a cushion for a nasal mask that includes an undercushion or backup band in the region of the top lip, and no undercushion or backup band in the sides of the nose or ridge of the nose regions to avoid relatively high sealing forces on the sides of the nose or ridge of the nose regions as these relatively high sealing forces may cause occlusion of the nasal airway. [000831 Another aspect of includes a cushion for a nasal the present technology mask, the cushion having a sealing region, a side wall region and an attachment region, wherein the the side sealing region is adapted to form a seal with a patient, wall region connects the sealing region and attachment region, and the attachment region is adapted to connect or otherwise attach to an air delivery system. [000841 Another aspect of the present technology includes a cushion for a nasal mask, the cushion having a sealing region and an attachment region, wherein the attachment region comprises a decoupling element. [000851 Another aspect of the present technology includes a cushion for a nasal mask, the cushion having a sealing region and an attachment region, wherein the attachment region comprises a decoupling element, the decoupling element wall comprising a relatively thinner wall section. For example, the relatively thinner section may be 50-85% thinner. a nasal [000861 Another aspect of the present technology includes a cushion for with a side wall, mask, the cushion comprising headgear connectors integrally formed e.g., wherein the side wall is constructed of a flexible elastomer or rubber. [000871 Another present for a nasal aspect of the technology includes a cushion mask, the cushion comprising headgear connectors, the headgear connectors RECTIFIED SHEET (RULE 91) ISA/AU constructed and arranged to position a portion of a sealing region superior to or above the pronasale or tip of the patient's nose.

Another aspect of the present technology includes a cushion for a nasal mask, the cushion having a nose ridge region, the nose ridge region having a dip or curvature, e.g. a local saddle region, adapted to conform to, or be complementary to the nose ridge of the patient.

A further aspect of the present technology includes a cushion for a nasal mask, the cushion having a nose ridge region, the nose ridge region having a relatively longer membrane length when compared to other regions of the cushion, the relatively longer membrane length adapted to engage a greater fit range of patient's nose ridge heights.

Another aspect of the present technology includes a cushion for a nasal mask, the cushion having a sides of the nose region, the sides of the nose region having a raised portion, the raised portion having a greater height when compared to the nose ridge region, the raised portion adapted to engage with the sides of the patient's nose and ensure engagement with tall nose ridges as well as flat nose ridges.

Another aspect of the present technology includes a cushion for a nasal mask, the cushion having a corners of the nose region, generally corresponding to the region of the face between and including the subalare and the alar crest, the corners of the nose region having the greatest height when compared to all other regions of the cushion, wherein the corners of the nose region anchors the cushion in position. The height of the corners of the nose region may be arranged to ensure seal in the corners of the nose, as this is a particularly difficult area of the face to seal on.

Another aspect of the present technology includes a cushion for a nasal mask, the cushion having a top lip region, the top lip region configured to conform the curvature of a patient's top lip region. The top lip region may be generally rounded, extending from a trough or dip and continuing up to the sides of the nose region. The membrane at the top lip region may stretch across a patient's top lip to seal with the ensure a patient's top lip.

RECTIFIED SHEET (RULE 91) ISA/AU mask Another aspect of the present technology relates to a nasal system including cushion assembly region that provides a single a including a sealing orifice assembly adapted to surround both nares of the patient's nose and a headgear including a pair of side straps and a rear strap. The side straps are adapted to extend along sides of the patient's face between the patient's eyes and ears and engage respective headgear connectors provided to the cushion assembly to provide a two- point connection with the cushion assembly. The rear strap extends between the side straps and is adapted along, to engage along the back or posterior of the patient's head below or inferior to the occipital bone.

Another aspect of the present technology relates to a nasal mask system including a cushion assembly including a sealing region having a nose ridge region, sides of nose region, corners of nose region, and a top lip region adapted to seal around both nares of the patient's nose. The nose ridge region is adapted to be positioned and seal along a nasal cartilage region which is above or superior to the pronasale and below or inferior to a nasal bone region of the patient's nasal bridge. In form, the sealing region includes a membrane seal that extends around an entire perimeter of the sealing region and an undercushion that is only provided in the top lip and corners of nose regions.

Another aspect of the present technology relates to a nasal mask system including a cushion assembly including a sealing region adapted to seal around both nares of the patient's nose, an attachment region adapted to receive an elbow assembly, and a side wall region extending between the sealing region and the attachment region. The sealing region has a nose ridge region, sides of nose region, an area corners of nose region, and a top lip region. The side wall region includes adjacent the top lip region of the sealing region that includes a thickness that is less than corresponding thicknesses adjacent the nose ridge, sides of nose, and corners sealing region. nose regions of the 1000961 Another aspect of the present technology relates to a nasal mask system including a cushion assembly including a sealing region having a nose ridge region, sides of nose region, to corners of nose region, and a top lip region adapted seal around both nares of the patient's nose. The sides of nose region includes a RECTIFIED SHEET (RULE 91) ISA/AU portion adapted to be positioned and seal along a region adjacent the junction between the nasal greater alar cartilage and the lateral nasal cartilage of the patient's nose.

Another aspect of the present technology relates to a patient interface applying a supply of air at positive pressure to the entrance of a patient's airways.

The patient interface includes a nasal mask and a positioning and stabilising structure.

The nasal mask has a seal forming portion constructed and arranged to form a seal on a portion of an upper lip of a patient, and to form a seal on a portion of a cartilaginous framework of the patient's nose. The nasal mask further has a plenum chamber that receives in use a portion of the patient's nose including the pronasale. The positioning and stabilising structure includes a pair of side straps that provide a two-point connection to the nasal mask and being constructed and arranged to be donned or removed without the side straps passing inferior to the patient's ears. [00098) Another aspect of the present technology relates to a method fitting a patient interface to a patient. The method includes positioning a sealing region of the patient interface with respect the patient's nose such that the sealing region surrounds both nares and engaging headgear straps of the patient interface with patient's head without passing straps inferior to the patient's ears.

Another aspect of the present technology relates to a nasal mask for delivery of a supply of air to the entrance of a patient's airways. The nasal mask includes a superior sealing portion and an inferior sealing portion. The superior sealing portion is constructed and arranged to be located on a portion of the cartilaginous framework of the nose, and to form a seal therewith without exerting a sealing force that would restrict a flow of air through the nasal cavity. The inferior sealing portion is constructed and arranged to be located in part on a portion of an upper lip of a patient and to direct a sealing force to a portion of a maxilla bone of the patient.

Another aspect of the present technology relates to a nasal mask defining a breathing chamber for delivery to the of a supply of gas at positive pressure airways of a patient.

The nasal mask includes a vent ad a cushion. The vent is adapted to exhaust breathable gas and is adapted to be sufficiently rigid to avoid RECTIFIED SHEET (RULE 91) ISA/AU collapse.

The cushion includes a sealing cuff and headgear connectors. The sealing cuff comprises a membrane seal and an undercushion. The membrane seal extends about a perimeter of the cushion including a nose ridge region of the cushion and a side of the nose region of the cushion, and the undercushion is located in a top lip region of the cushion and does not extend to the nose ridge region of the cushion or the side of the nose region of the cushion. The headgear connectors are formed with a side wall of the cushion.

Another aspect of the present technology relates to a patient interface for applying a supply of air at positive pressure to the entrance of a patient's airways.

The patient interface includes a nasal mask and a positioning and stabilising structure.

The nasal mask has a seal forming portion constructed and arranged to form a seal on a portion of an upper lip of a patient, and to form a seal on a portion of a cartilaginous framework of the patient's nose. The nasal mask further has a plenum chamber that receives in use a portion of the patient's nose including the pronasale. The positioning and stabilising structure provides a sealing vector oriented at an angle with respect to a Frankfort horizontal direction. The positioning and stabilising structure includes a two-point connection to the nasal mask.

Another aspect of the present technology interface relates to a patient for applying a supply of air at positive pressure to the entrance of a patient's airways.

The patient interface includes a nasal mask and a positioning and stabilising structure.

The nasal mask a seal on has a seal forming portion constructed and arranged to form a portion of an upper lip of a patient, and to form a seal on a portion of a cartilaginous framework of the patient's nose. The nasal mask further has a plenum chamber that receives in use a portion of the patient's nose including the pronasale. The positioning and stabilising structure provides a sealing vector oriented at an angle with respect to a Frankfort horizontal direction. The nasal mask does not include a forehead support.

Another aspect of the present technology relates to a patient interface for applying a supply of air at positive pressure to the entrance of a patient's airways. interface includes a nasal The patient mask and a positioning and stabilising structure.

The nasal mask has a seal forming portion constructed and arranged to form a seal on a portion of an upper lip of a patient, and to form a seal on a portion of a cartilaginous RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 framework of The nasal mask the patient's nose. further has a plenum chamber that receives in use a portion of the patient's nose including the pronasale. The positioning and stabilising structure provides a sealing vector oriented at an angle with respect to a Frankfort horizontal direction. The positioning and stabilising structure includes a pair of side straps adapted to extend towards and over a crown of the patient's head.

Of course, portions of the aspects may form sub-aspects of the present technology. Also, various ones of the sub-aspects and/or aspects may be combined various manners and also constitute additional aspects or sub-aspects of the present technology.

Other features of the technology will be apparent from consideration the information contained in the following detailed description, abstract, drawings and claims. 4 BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS The present technology is illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings, in which like reference numerals refer to similar elements including: 4.1 TREATMENT SYSTEMS Fig. la shows a system in accordance with the present technology. A patient 1000 wearing a patient interface 3000, receives a supply of air at positive pressure from a PAP device 4000. Air from the PAP device is humidified in a humidifier 5000, and passes along an air circuit 4170 to the patient 1000. The PAP device 4000, humidifier 5000 and air circuit 4170 may be connected to a patient interface 3000 in accordance with the present technology. 4.2 THERAPY 4.2.1 Respiratory system Fig. 2a shows an overview of a human respiratory system including the nasal and oral cavities, the larynx, vocal folds, oesophagus, trachea, bronchus, lung, alveolar sacs, heart and diaphragm.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 10001091 Fig. 2b shows a view of a human upper airway including the nasal cavity, nasal bone, lateral nasal cartilage, greater alar cartilage, nostril, lip superior, lip inferior, larynx, hard palate, soft palate, oropharynx, tongue, epiglottis, vocal folds, oesophagus and trachea. 4.2.2 Facial anatomy [0001101 Fig. 2c is a front view of a face with several features of surface anatomy identified including the lip superior, upper vermillion, lower vermilion, lip inferior, mouth width, endocanthion, a nasal ala, nasolabial sulcus and cheilion. [0001111 Fig. 2d is a side view of a head with several features of surface anatomy identified including glabella, sellion, pronasale, subnasale, lip superior, lip inferior, supramenton, nasal ridge, otobasion superior and otobasion inferior. Also indicated are the directions superior & inferior, and anterior & posterior. [0001121 Fig. 2e is a further side view of a head. The approximate locations of the Frankfort horizontal and nasolabial angle are indicated. 10001131 Fig. 2f shows a base view of a nose. [0001141 Fig. 2g shows a side view of the superficial features of a nose. (0001151 Fig. 2h shows subcutaneal structures of the nose, including cartilaginous framework comprising the lateral cartilage, septum cartilage, greater alar cartilage, lesser alar cartilage and also shows the fibrofatty tissue. [0001161 Fig. 2i shows a medial dissection of a nose, approximately several millimeters from a sagittal plane, amongst other things showing the septum cartilage and medial crus of greater alar cartilage.

Fig. 2j shows a front the frontal, 10001171 view of the bones of a skull including temporal, nasal and zygomatic bones. as are the maxilla, Nasal concha are indicated, mandible and mental protuberance. [0001181 Fig. 2k shows a lateral view of surface of a skull with the outline of the a head, as well as several muscles. The following sphenoid, bones are shown: frontal, RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 nasal, zygomatic, maxilla, mandible, The mental parietal, temporal and occipital. protuberance is indicated. The following muscles are shown: digastricus, masseter sternocleidomastoid and trapezius. 4.3 PATIENT INTERFACE Fig. 3-1 is a perspective view of a nasal mask system according to an example of the present technology.

Fig. 3-2 is a side view of a nasal mask system according to an example of the present technology. The nasal mask system is shown overlaying a head to indicate the approximate relative location of the headgear in use.

Fig. 3-3 is a front view of a nasal mask system according to an example of the present technology.

Fig. 3-4 is a perspective front view of a cushion of a nasal mask system according to an example of the present technology.

Fig. 3-5 is a perspective rear view of a cushion of a nasal mask system according to an example of the present technology. 1000124] Fig. 3-6 is a bottom view of a cushion of a nasal mask system according to an example of the present technology.

Fig. 3-7 is a top view of a cushion of a nasal mask system according to an example of the present technology. [000126) Fig. 3-8 is a front view of a cushion of a nasal mask system according to an example of the present technology.

Fig. 3-9 is a rear view of a cushion of system according a nasal mask an example of the present technology.

Fig. 3-10 nasal mask is a cross-sectional view of the cushion of the system of Fig. 3-9.

RECTIFIED SHEET (RULE 91) ISA/AU Fig. 3-11 is a perspective view of a nasal mask of an elbow assembly system according an example of the to present technology.

Fig. 3-12 is a rear view of an elbow assembly of a nasal mask system according to an example of the present technology.

Fig. 3-13 is a cross-sectional view of the elbow assembly of a nasal mask system of Fig. 3-12.

Fig. 3-14 is a perspective rear view of a cushion of a nasal mask system according to another example of the present technology.

Fig. 3-15 is a top view of the cushion of Fig. 3-14.

Fig. 3-16 is a bottom view of the cushion of Fig. 3-14.

Fig. 3-17 is a front view of the cushion of Fig. 3-14.

Fig. 3-18 is a cross-section 3-17. view of the cushion of Fig.

Fig. 3-19 is an enlarged view of a portion of Fig. 3-18.

Fig. 3-20 is a rear view of the cushion of Fig. 3-14. [0001391 Fig. 3-21 is a side view of the cushion of Fig. 3-14.

Fig. 3-22 is a rear view of the cushion of Fig. 3-14 showing cross- sectional lines.

Fig. 3-23 is a cross-section through line 3-23 - 3-23 of Fig. 3-22.

Fig. 3-24 is a cross-section through line 3-24 - 3-24 of Fig. 3-22.

Fig. 3-25 is a cross-section through line 3-25 - 3-25 of Fig. 3-22.

Fig. 3-26 is of Fig. 3-22. a cross-section through line 3-26 - 3-26 Fig. 3-27 is a cross-section through line 3-27 - 3-27 of Fig. 3-22.

Fig. 3-28 is a cross-section through line 3-28 - 3-28 of Fig. 3-22.

RECTIFIED SHEET (RULE 91) ISA/AU Fig. 3-29 is a cross-section through line 3-29 - 3-29 of Fig. 3-22.

Fig. 3-30 is a cross-section through line 3-30 - 3-30 of Fig. 3-22.

Figs. 3-31 to 3-34 are sequential views showing exemplary steps for donning a nasal mask system according to an example of the present technology.

Fig. 3-35 is a cross-sectional view showing a nasal mask system engaged with a patient's face according to an example of the present technology.

Fig. 3-36 is a cross-sectional view showing a nasal mask system engaged with a patient's face according to an example of the present technology.

Fig. 3-37 is another perspective view of the cushion of Fig. 3-14.

Fig. 3-38 shows a cushion assembly engaged with the patient's face and under pressure or inflated in use according to an example of the present technology.

Fig. 3-39 is a schematic rear view of a cushion assembly showing the sealing portions engaged with the patient's face in use according to an example of the present technology.

Figs. 31 to 38 show various views of a cushion assembly according to another example of the present technology. [000156j Figs. 31 to 310 show various views of a cushion assembly according to another example of the present technology.

Fig. 3-42 is an isometric sectional view of a swivel elbow and cross connector assembly according to an example of the technology. cross sectional side view of the swivel elbow and Fig. 3-43 is a connector assembly of Fig. 1.

Figs. 3-44 and 3-45 are exploded isometric views of the swivel elbow and connector assembly of Fig. 3-42.

RECTIFIED SHEET (RULE 91) ISA/AU Figs. 3-46 and 3-47 are isometric views of a double swivel elbow and connector assembly according to another example of the technology in a first position or configuration.

Fig. 3-48 is a side view of the double swivel elbow and connector assembly of Figs. 3-46 and 3-47.

Fig. 3-49 is a side view of the double swivel elbow and connector assembly of Fig. 3-48 in a second position or configuration.

Fig. 3-50 is a side view of the transition of the double swivel elbow connector assembly from the first position to the second position.

Fig. 3-51 is an isometric cross sectional view of the double swivel elbow and connector assembly in the first position.

Fig. 3-52 is an isometric cross view of the double swivel sectional elbow and connector assembly in the second position.

Fig. 3-53 is a cross sectional side view of the double swivel elbow and connector assembly in the first position.

Fig. 3-54 is a cross sectional side view of the double swivel elbow and connector assembly in a third position or configuration.

Fig. 3-55 is a cross sectional side view of the transition of the double swivel elbow and connector assembly from the first position position. to the second Fig. 3-56 is a cross sectional side view of the double swivel elbow connector assembly in a fourth position or configuration.

Fig. 3-57 is a cross sectional side view of the transition of the double swivel elbow and connector assembly from the third position to the fourth position.

Figs. 3-58 and 3-59 views swivel and are isometric of a triple elbow connector assembly including a second swivel cuff according to still another example of the technology in a first position or configuration.

RECTIFIED SHEET (RULE 91) ISA/AU 3-60 is an isometric view of the triple swivel elbow and connector Fig. position or configuration. assembly of Figs. 3-58 and 3-59 in a second a side view of the elbow and connector Fig. 3-61 is triple swivel assembly of Figs. 3-58 and 3-59.

Fig. 3-62 is a side view of the transition of the triple swivel elbow and connector assembly from the first position to the second position.

Fig. 3-63 is side view of the triple swivel elbow and connector assembly in the second position.

Fig. 3-64 is a cross sectional side view of the triple swivel elbow and connector assembly in the first position.

Fig. 3-65 is a cross sectional side view of the triple swivel elbow and connector assembly in the second position.

Fig. 3-66 is side view of the transition of the triple swivel elbow and connector assembly from the first position to the second position.

Fig. 3-67 is a cross sectional isometric view of the triple swivel elbow and connector assembly in the first position.

Fig. 3-68 view of the triple swivel elbow is a cross sectional isometric and connector assembly in the second position.

Fig. 3-69 is a cross sectional side view of the triple swivel elbow and connector assembly in a third position or configuration. swivel elbow and Fig. 3-70 is a cross sectional side view of the triple connector assembly in a fourth position or configuration.

Fig. view of the transition of the swivel 3-71 is a cross sectional side elbow and connector assembly from the third position to the fourth position.

Fig. 3-72 is a cross sectional view of a patient interface structure, or cushion, usable with examples of the technology.

RECTIFIED SHEET (RULE 91) ISA/AU Fig. 3-73 is an isometric view of a swivel elbow and connector assembly according to an example of the technology.

Fig. 3-74 is a partial side cross sectional view of the swivel elbow and connector assembly of Fig. 3-73.

Fig. 3-75 is a top cross sectional view of the swivel elbow and connector assembly of Fig. 3-73.

Fig. 3-76 is an isometric view of a variation of the swivel elbow and connector assembly of Fig. 3-73.

Fig. 3-77 is a front view of the swivel elbow and connector assembly of Fig. 3-76.

Fig. 3-78 is a cross sectional view of the swivel elbow and connector assembly of Fig. 3-76.

Fig. 3-79 is an isometric view of a first component of a swivel elbow and anti-asphyxia valve assembly according to an example of the technology. (000192] Fig. 3-80 is a side view of the first component of Fig. 3-79.

Fig. 3-81 is a rear view of the first component of Figs. 3-79 and 3-80.

Fig. 3-82 is a cross sectional side view of the first component of Figs. 3-79 to 3-81.

Fig. 3-83 is an isometric view of the first component and a second component of the swivel elbow and anti-asphyxia valve assembly.

Fig. valve 3-84 is a side view of the swivel elbow and anti-asphyxia assembly of Fig. 3-83.

Fig. 3-85 is a rear view valve of the swivel elbow and anti-asphyxia assembly of Figs. 3-83 and 3-84.

RECTIFIED SHEET (RULE 91) ISA/AU Fig. 3-86 is a front view the swivel elbow and anti-asphyxia valve assembly of Figs. 2-83 to 3-85.

Fig. 3-87 is a cross sectional side view of the swivel elbow and anti- asphyxia valve assembly of Figs. 3-83 to 3-86.

Fig. 3-88 is a top view of the swivel elbow and anti-asphyxia valve assembly of Figs. 3-83 to 3-87.

Fig. 3-89 is an isometric view of a patient interface including a swivel elbow and connector assembly according to another example of the technology.

Fig. 3-90 is an isometric view of a patient interface including a swivel elbow and connector assembly according to another example of the technology.

Fig. 3-91 is an isometric view of the elbow of Fig. 3-90.

Fig. 3-92 is a cross sectional view of the patient interface of Fig. 3-90.

Fig. 3-93 is a cross sectional view of a patient interface including a swivel elbow and connector assembly according to another example of the technology.

Fig. 3-94 is an isometric view of an elbow according to an example of the technology. cross sectional view of the elbow of Fig. 3-94.

Fig. 3-95 is a Fig. 3-96 is a cross sectional view of an elbow and tube connector assembly according to the technology.

Fig. 3-97 is an enlarged view of a portion of Fig. 3-96.

Fig. 3-98 is an exploded assembly view of the elbow and tube connector assembly of Fig. 3-96. [0002111 Fig. 3-99 is an exploded assembly view of an elbow and tube connector assembly according to another example of the technology.

RECTIFIED SHEET (RULE 91) ISA/AU Fig. 3-100 is an assembly view of the elbow and tube connector assembly of Fig. 3-99.

Fig. 3-101 is a cross sectional view of the elbow and tube connector assembly of Fig. 3-100.

Fig. 3-102 is an exploded assembly view of an elbow and tube connector assembly according to another example of the technology.

Fig. 3-103 is an assembly view of the elbow and tube connector assembly of Fig. 3-102.

Fig. 3-104 is a cross sectional view of the elbow and tube connector assembly of Fig. 3-103.

Fig. 3-105 is an isometric view of the connector of the elbow and tube connector assembly of Fig. 3-104.

Fig. 3-106 is a cross sectional view of the connector of Fig. 3-105.

Fig. 3-107 is a cross sectional view of a tube connector assembly according to an example of the technology.

Fig. 3-108 is an isometric view of the tube connector of Fig. assembly 3-107.

Figs. 3-109A-D show a multi-step process for manufacturing an elbow with anti-asphyxia valve.

Fig. 3-110A shows a perspective view of a variant of the elbow.

Fig. 3-110B a in Fig. 3-110A. shows cross section of the variant shown Fig. 3-111 shows the AAV (a variant) in isolation.

Figs. 31 and 32 are a top view and related cross-sectional view showing a nasal mask system engaged with a patient's face according to an example of the present technology, the nasal mask system in a static sealing position.

RECTIFIED SHEET (RULE 91) ISA/AU Figs. 31 and 32 are a side view and related cross-sectional view showing a nasal mask system engaged with a patient's face according to an example of the present technology, the nasal mask system in a static sealing position.

Figs. 31 and 32 are a top view and related cross-sectional view showing a nasal mask system engaged with a patient's face according to an example of the present technology, the nasal mask system in a dynamic sealing position with the nasal mask system being pulled sideways.

Figs. 31 and 32 are a side view and related cross-sectional view showing a nasal mask system engaged with a patient's face according to an example of the present technology, the nasal mask system in a dynamic sealing position with the nasal mask system being pulled upwards.

Figs. 31 and 32 are an alternative side view and related cross-sectional view showing a nasal mask system in a dynamic sealing position with the nasal mask system being pulled upwards.

Figs. 31 and 32 are a side view and related cross-sectional view showing a nasal mask system engaged with a patient's face according to an example of the present technology, the nasal mask system in a dynamic sealing position with the nasal mask system being pulled downwards.

Figs. 31, 32, and 33 illustrate rotation of an elbow assembly in the X-axis, Z-axis, and Y-axis according to an example of the present technology.

Fig. 31 is a perspective view of a nasal mask system with the short tube in a retracted position according to an example of the present technology.

Fig. 32 is a perspective view of a nasal mask system with the short tube in an extended position according to an example of the present technology.

Figs. 31 to 34 show various views of an elbow, short tube and swivel assembly according to an example of the present technology.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 Fig. 35 shows a cross-section through line 35120-5 Fig. 34. a cross-section Fig. 36 shows through line 36120-6 of Fig. 34.

PAP DEVICE Fig. 4a shows a PAP device in accordance with one form of the present technology.

DETAILED DESCRIPTION ILLUSTRATED EXAMPLES Before the present technology is described in further detail, it is to be understood that the technology is not limited to the particular examples described herein, which may vary. It is also to be understood that the terminology used in this disclosure is for the purpose of describing only the particular examples discussed herein, and is not intended to be limiting.

The following description is provided in relation to several examples which may share common characteristics and features. It is to be understood that one or more features of any one example may one or more features of be combinable with the other examples. of features In addition, any single feature or combination in any of the examples may constitute additional examples. is to be understood in its In this specification, the word "comprising" "open" sense, that is, in the sense of "including", and thus not limited to its "closed" sense, that is the sense of "consisting only of". A corresponding meaning is to be attributed to the corresponding words "comprise", "comprised" and "comprises" where they appear.

The term "air" will be taken to include breathable gases, for example air with supplemental oxygen. Hence a supply of air may correspond to a supply of gas including air and supplemental oxygen. It acknowledged that the PAP is also devices or blowers herein may be designed to pump fluids air. described other than RECTIFIED SHEET (RULE 91) ISA/AU a nasal mask system Examples of the technology are directed towards that is easy and quick to fit (e.g., with little or no adjustment), enable reduced strap tension, is manufacturable in high volumes, provides high consumer appeal, provides comfort and seal, provides reliable quality, unobtrusive, and/or fits a large majority of the population.

One or more examples may include exemplary metrics, e.g., dimensions, angles, percentages, etc. Although specific metrics and ranges therefore may be provided, it is to be understood that these metrics and ranges are merely exemplary and other metrics and ranges are possible depending on application. For example, metrics/ranges that vary from those provided +/- 10-20% may be suitable for particular applications.

The present technology is adapted to provide an arrangement or assembly between a patient interface and a tube that may be adapted to decouple tube drag forces, provide a freedom of movement for the tube to enable a patient to position the tube in a desired position without disrupting the seal, vent exhausted gases and provide a compact, unobtrusive design that is aesthetically acceptable to patients.

The venting arrangement may diffuse the exhausted air to prevent air jetting on patients or their bed partners, and to reduce noise.

The venting arrangement may cooperate with the elbow or connector assembly to further diffuse exhaled air, for example the elbow may be provided with a ridge to deflect air in a diffused manner.

The elbow may be provided with one or more swivel connectors adapted to provide more degrees of movement and aid in decoupling tube drag forces. [0002481 The elbow may be referred to as an adaptor, connector or may be described as any element attach an air delivery tube to a patient interface.

RECTIFIED SHEET (RULE 91) ISA/AU .1.1 Nasal CPAP for OSA a method of treating In one form, the present technology comprises in a patient by applying nasal continuous positive airway Obstructive Sleep Apnea pressure to the patient. .2 PATIENT INTERFACE 3000 A patient interface 3000 in accordance with one aspect of the present technology comprises the following functional aspects: a seal-forming structure 3100, a plenum chamber 3200, a positioning and stabilising structure 3300 and a connection connection to an air circuit 4170 (e.g., see Fig. 3-2). In some forms a port 3600 for functional aspect may be provided by one or more physical components. In some forms, one physical component may provide one or more functional aspects. In use the seal-forming structure 3100 is arranged to surround an entrance to the airways of the airways. the patient so as to facilitate the supply of air at positive pressure to In an example, the plenum chamber 3200 and the seal forming structure 3100 are moulded in one piece. In another example they are formed as two or more separate components. with one form of the present A patient interface 3000 in accordance technology is nasal mask system 100. As shown in Figs. 3-1 to 3-3, nasal mask a headgear system 100 in accordance with the present technology may comprise a cushion assembly 110, an elbow assembly 120, an air delivery assembly 130 and of the cushion assembly or cushion 150. Figs. 3-4 to 3-10 show various views assembly 120. assembly 150, and Figs. 3-11 to 3-12 show various views of the elbow with one form of the present A plenum chamber 3200 in accordance is cushion assembly 150. Cushion assembly 150 may be adapted to technology As shown in Figs sealingly engage with a patient's airway, including a patient's nose. breathable gas from air delivery 3-1 to 3-3, cushion assembly 150 may receive in position by headgear assembly 130 and/or elbow assembly 120, and be supported assembly 110.

Cushion assembly 150 may comprise a sealing region or sealing cuff 151, two headgear connectors 156, a side wall or side wall region 157 and an RECTIFIED SHEET (RULE 91) ISA/AU attachment region 158. In an example, cushion assembly 150 may be formed from a flexible elastomer or rubber. 10002551 Figs. 3-14 to 3-30, 3-35, and 31 to 32 show various views of a cushion assembly 250 according to another example of the present technology, which is similar to the cushion assembly 150. Cushion assemblies 150, 250 are generally referred to as a compact nasal cushion in contrast to the embodiment depicted in Fig. 3-74 which is generally referred to as nasal pillows. As described below, the cushion assembly 250 includes a thinner wall section adjacent a top lip region of the sealing region of the cushion assembly 250 (e.g., to avoid excessive pressure on the patient's columella and septum). Also, each side of the nose region of the sealing region includes a wing or sealing flap adapted to form a seal on the region adjacent junction between the nasal greater alar cartilage and the lateral nasal cartilage of the patient's nose.

In the illustrated example of Figs. 3-14 to 3-21, DI is about 85-105 mm (e.g., about 97 mm), D2 is about 35-55 mm (e.g., about 48 mm), D3 is about 35-55 mm (e.g., about 44 mm), D4 is about 30-50 mm (e.g., about 41 mm), D5 is about 25- 45 mm (e.g., about 35 mm), D6 is about 20-30 mm (e.g., about 26 mm), D7 is about 40-60 mm (e.g., about 50 mm), and D3 is about 20-30 mm (e.g., about 23 mm).

Although specific dimensions are provided, it is to be understood that these dimensions are merely exemplary and other dimensions are possible depending on application. For example, the exemplary dimensions may vary by +/20% or more or less depending on application. .2.1 Seal-forming structure 3100 10002571 In one form of the present technology, a seal-forming structure 3100 provides a sealing-forming surface, and may additionally provide a cushioning function. 10002581 In an example, a seal-forming structure 3100 in accordance with the present technology is constructed from a soft, flexible, such as resilient material silicone.

RECTIFIED SHEET (RULE 91) ISA/AU comprises a sealing In one form, the seal-forming structure 3100 flange 3110 sealing and a support flange 3120. In one form of the present technology, flange 3110 flange includes membrane 160 of the sealing region 151 and support 3120 includes 151 (e.g., see undercushion or backup band 165 of the sealing region Fig. 3-10).

In an example, the sealing flange 3110 comprises a relatively thin member with a thickness of less than about lmm, for example about 0.25mm to about 0.45mm that extends around 3210 of the In an example, the perimeter plenum chamber 3200. the support flange is relatively thicker than the sealing 3110. The support 3120 flange flange 3120 is disposed between the sealing flange 3110 and the marginal edge 3220 of the plenum chamber 3200, and extends at least part of the way around the perimeter 3210 of the plenum chamber 3200. The support flange 3120 is a spring-like element and functions to support the sealing flange 3110 from buckling in use. In use the sealing flange 3110 can readily respond to system pressure in the plenum chamber 3200 acting on its underside to urge it into tight sealing engagement with the face.

In one form of the present technology, seal-forming structure 3100 comprises a superior sealing portion 3102 and an inferior sealing portion 3104 (e.g., 3-10 and 3-21). The superior sealing portion 3102 and the inferior sealing see Figs. portion 3104 are, e.g., located adjacent one another, and one region may blend into the other. .2.1.1 Superior sealing portion 3102 Superior sealing portion 3102 is constructed and arranged to form a seal on a portion of the cartilaginous framework of the nose. In an example, superior sealing e.g. a flap, flange portion 3102 is constructed from a relatively thin material, or membrane of material e.g. a thermoplastic elastomer, or a silicone rubber, and further, e.g., one that readily bends or folds in response to light finger pressure when it is being used, a not in use. Depending on the shape of the nose with which narrow portion 3102 may engage with nose ridge relatively width of superior sealing of superior sealing portion 3102 may engage to form a seal. A relatively wider portion with the skin to adjacent lateral nasal cartilage form a seal. See, e.g., Fig. 3-39.

The portion 3102 is whole superior sealing not designed to overlay the of the nose.

RECTIFIED SHEET (RULE 91) ISA/AU In an example, the superior sealing portion 3102 is constructed and arranged, e.g. by being thin and flexible, to be adaptable to different heights of nose ridge. In this way, the range of faces that will be able to get a good seal is increased.

Furthermore, for a given face and nose, the flexibility of the superior sealing portion 3102 means that a seal may be maintained should the plenum chamber 3200 may be moved, e.g. in response to movement of the air circuit 4170.

While the superior sealing portion is constructed so that it does not overlay the nasal bones in use, certain portions of the superior sealing portion may overlay some part of the nasal bones on some faces, depending on exactly how the patient interface is used and the size and shape of the particular face.

In an alternative form, the superior sealing portion is constructed and arranged to form a seal on the nasal bones in use. .2.1.2 Inferior sealing portion 3104 Inferior sealing portion 3104 is constructed and arranged to form seal on a portion of the upper lip of a patient, and to direct at least part of a sealing force the maxilla bone of the patient.

In use, part of the inferior sealing portion 3104 is located close to the subalare and the alar crest point.

In one form, inferior sealing portion is configured to avoid excessive pressure on the upper teeth or gums. In an example, the inferior sealing portion does not extend along bone (e.g., frontal process of maxilla) superiorly to the alar crest point, however it should be appreciated that in other examples it might.

Inferior sealing portion 3104 may a single, be constructed from relatively thicker flap, rim or flange of material, e.g. a silicone rubber, or thermoplastic elastomer, e.g. with a thickness of about 1mm to 2mm. In one form, inferior sealing portion 3104 may be constructed from a dual flap, rim or flange, for example one being relatively thin and the other being relatively thick. Alternatively, inferior sealing portion 3104 may be constructed from a gel-filled bladder.

RECTIFIED SHEET (RULE 91) ISA/AU .2.1.3 "W" shaped region [0002701 Figs. 31 to 38 show of a cushion assembly 350 various views according to another example of the present In this example, the cushion technology. assembly includes a general "W" shape in the top lip region, i.e., general "W" shape along the outer (inferior) edge 360(o) of the membrane 360 in the top lip region as best shown in Fig. 34.

Figs. 31 to 38 show various views of a cushion assembly 450 according to another example of the present technology. This example shows cushion assembly with a general "W" shape in the top lip region. In contrast to the example of Figs. 31 to 38, the cushion example of Figs. 31 to 38 includes general "W" shape along both the inner (superior) of edge 460(i) the membrane 460 and the outer (inferior) edge 460(o) of the membrane in the top lip region as best shown in Fig. 34.

In one form, the "W" portion of the top lip region is constructed and arranged so that a middle portion of the "W" may rest on the subnasale or columella in use, in the event of the seal forming portion shifting upwards (superiorly) in use, leaving clearance (e.g.; indicated by c in Fig. 38 which is between an inner edge of the undercushion 465 and an inner surface of the plenum chamber) around the respective left and right subalare.

In an example, as best shown in Figs. 46, 37, and 310, a or c- portion of the sealing portion may have a question-mark shaped, sickle shaped, shaped cross-section. The question-mark shaped, sickle shaped, or c-shaped cross- section may provide the sealing portion with greater range of movement or flexibility towards the patient's face in use. In the illustrated example, the question-mark of the shaped, sickle shaped, or c-shaped cross-section is provided to a lower portion wall region 457, which provides a space below the undercushion 465 and/or the side lower portion of the undercushion 465 and adjacent the side wall region 457. For example, the lower portion of the undercushion 465 is radially offset towards the outside of the side wall region 457. It should be appreciated that such cross-section provided may be around the entire perimeter of the cushion or may only be provided RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 in selected cushion, e.g., only in the top lip region. Also, the size regions of the and/or configuration cross-section may of such vary in selected regions.

In the illustrated example of Figs. 31 to 38 and 31 to 3 8, DI is about 90-110 mm (e.g., about 105 mm), is about 40-60 mm (e.g., about 51 mm), D3 is about 40-60 mm (e.g., about 51 mm), D4 is about 35-55 mm (e.g., about 44 mm), D5 is about 30-50 mm (e.g., about 38 about mm), D6 is 25-35 mm (e.g., about 32 45 mm), D7 is about -65 mm (e.g., about 58 mm), and D8 is about 20-30 mm (e.g., about 26 mm). Although specific dimensions are provided, it is to be understood that these dimensions are merely exemplary and other dimensions possible depending on application. For example, the exemplary dimensions may vary by +120% or more or less depending on application. For example, the sealing portion and aperture may wider, e.g., DI be is about 100-120 mm (e.g., about 114 mm), D6 is about 40-50 mm (e.g., about 42 mm), D7 is about 55-75 mm (e.g., about mm), and D8 is about 20-30 mm (e.g., about 24 mm). In another example, sealing portion and aperture may be narrower, e.g., DI is about 90-110 mm (e.g., about 100 mm), D6 is about 25-35 mm (e.g., about 28 mm), D7 is about 45-65 mm (e.g., about 54 mm), and D8 is about 20-30 mm (e.g., about 24 mm). .2.1.4 Sealing Region accordance with another form of the present technology seal forming structure 3100 comprises sealing region 151. Sealing region 151 may be adapted to interfke with the patient and form a seal with the patient's airways.

Sealing region 151 may include a nose ridge or nose ridge region 152, sides of the nose region 153, corners of the nose region 154 and top lip region 155. Sealing region Figs. 151 may comprise a membrane or flap type seal 160. In an example, as shown in 3-18 and 3-19, the inner edge of the membrane 260 may includes a bead 260-1, e.g., to prevent tearing, enhance sealing along the edge. Sealing region 151 may further comprise an undercushion or backup band 165, extending around part of or the entire perimeter of the sealing region. A further aspect of the present technology is a cushion for a mask that seals extent in above at its upper a region of the nose that is generally the tip of the nose, and extends across the alar or flares of the patient's nose.

RECTIFIED SHEET (RULE 91) ISA/AU In an example, sealing region 151 may be preformed or otherwise pre- shaped so as to conform to that patient's facial topography.

Sealing Along Nasal Ridge One aspect of the present technology relates to sealing of the sealing region in the nose ridge region. In an example, the sealing region in the nose ridge region is adapted to engage along the nasal ridge between the pronasale and sellion, and along the nasal cartilage region of the nasal ridge and below or inferior to the nasal bone. That is, the nasal mask system is constructed to have a seal-forming region that is substantially on at least part of the cartilaginous framework of the patient's nose and not on the nasal bone, i.e., seal along nasal ridge without contacting nasal bridge/skin on the nasal bone. (000278] For example, the sealing region 151 is adapted to be positioned and seal at its upper extent in a region of the nose that is generally above the tip of the nose (i.e., above the pronasale), and extends across the alar or flares of the patient's nose, e.g., not extending over or across the bone of the patient's nose.

In an example, the sealing region 151 is positioned at its upper extent in a region of the nose that is generally close to the junction between bone and cartilage on a range of people with larger noses, and avoids impinging on the sight of people with smaller noses.

Nose ridge Region Nose ridge region with a of a 152 may be adapted to engage nose ridge patient. In an example, the nose ridge region may be shaped or preformed to accommodate a patient's nose ridge, for example, as best shown on Fig. 3-7, the nose ridge region may be lower (i.e., closer to the sides of attachment region 158) than the the nose region 153. Nose ridge region 152 may comprise a membrane 160 for sealing without an undercushion or backup band. In an example, such an arrangement prevents excess pressure on the sensitive nose ridge region. In an example, the membrane at the nose ridge region 152 may be relatively longer that the membrane in other regions of the seal region, for example the top lip region membrane in 155. The RECTIFIED SHEET (RULE 91) ISA/AU the nose ridge in length. In an region 152 may be, for example, about 2-5mm example, in the membrane in the nose ridge region 152 may be about 2-4mm length.

In an example, the membrane in the nose ridge region 152 may be about 3mm in length.

Sides of the Nose Region 10002811 of with the sides Sides the nose region 153 may be adapted to engage of a patient's nose. In an example, sides of the nose region 153 may be preformed to accommodate the sides of the patient's nose and potentially their cheeks. As best shown on Fig. 3-5, sides of nose the region 153 extends from the apex of the cushion at nose ridge region 152 to the corners of the nose region 154. The sides of nose the region 153 slopes upwardly from the nose ridge region 152 to the corners of the nose region, see for example Fig. 3-6. Sides of the nose region 153 may comprise a membrane 160 for sealing without an undercushion or backup band. In an example, such arrangement prevents excess pressure on the sides of the patient's nose or alar or flares. Excess pressure on these regions may cause the cartilage of the nose to collapse inwardly towards the septum, thereby occluding or partially occluding the patient's airway.

Corners of the Nose Region 10002821 Corners of the nose region 154 may be adapted to form a seal with the corners of the patient's nose. Fig. 3-6 shows the corners of the nose region 154 having an apex or point generally indicated by HI, being the maximum height of the sealing region 151. This height is to ensure that the most force is applied to the sealing region 151 in the corners of the nose region 154, as this is a boney region of the face and is therefore less sensitive to pressure. Furthermore, this region of the patient's face is particularly difficult to seal on as the geometry of the face in this region is quite complex, so the greater the force applied to the seal in this region, the more likely a seal will form. In addition, since lower sealing forces are required on the nose ridge region and the sides of the nose region (for comfort and to avoid occlusion), the sealing region must be anchored at the corners of the nose region. Corners of the nose region 154 comprise a membrane or membrane seal 160 and an undercushion or RECTIFIED SHEET (RULE 91) ISA/AU backup band 165. The use of both a membrane and an may ensure a undercushion higher sealing force in this region. In an example, the membrane may have a thickness about 0.1-0.5mm, for example about 0.3mm. undercushion may In an example, the have a thickness 0.3-2mm. of about Top Lip Region Top lip region 155 may be adapted to engage the surface between the patient's top lip and base of the nose. In an example, top lip region may have a relatively shorter membrane length than the nose ridge region, for example a length of about 0.5-2.5mm, e.g., about 1.5-2.5mm. In an example, this shorter membrane length may be advantageous as some patient's only have a small space between their top lip and the base of their nose. As best shown in Fig. 3-10, top lip region 155 may have a membrane seal 160 and an undercushion or backup band 165. The use of both a membrane and an undercushion may ensure a higher sealing force in this region. In an example, the membrane may have a thickness about 0.1-0.5mm, for example about 0.3mm. In an example, the undercushion may have a thickness of about 0.3-2mm, example about 1.5mm. In an example, the thickness of the undercushion may vary along the length of the top lip region, for example from about 0.3mm at the corners of the nose region, to about 1.2mm at the centre of the top lip region. .2.1.5 Seal Use of the undercushion or back-up band enables the membrane or unsupported flap were facial flap to be made considerably thinner than if a single used. This is highly advantageous in that a thinner flap is in turn more flexible, so as to feel softer and more comfortable and more readily conform to irregularities in the facial contour. It also permits the flap to more readily respond to system pressure the breathing chamber acting on its underside to urge it into tight sealing engagement with the face.

As noted above, the nasal mask system is constructed to have a seal- forming region that is substantially on the cartilaginous framework on the nose (i.e., not on the nasal bone), and which does not block the nose. this may In an example, be achieved by providing a compression seal (e.g., using an undercushion structure) RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 along the patient's top lip (e.g., inferior sealing portion) and not on the patient's nose.

Seal on the patient's nose (e.g., superior sealing portion) may be achieved by tension in the membrane and/or a pneumatic seal.

For example, as shown in the cushion example of Figs. 3-14 to 3-30 and also described in the above example, the undercushion or backup band 265 is only provided in the top lip region 255 and the corners of the nose region 254 of the cushion, e.g., see Figs. 3-16, 3-18, 3-22, 3-23, 3-29, and 3-30. That is, the sealing region includes a single layer or membrane 260 only structure in the nose ridge region 252 and sides of the nose region 253 (e.g., see Figs. 3-18 and 3-22 to 3-28), and the sealing region includes a dual layer or membrane 260 and undercushion 265 structure in the top lip region 255 and corners of nose region 254. The dual layer structure provides a compression seal along the top lip region and corners of nose region. In contrast, the nose ridge region and sides of the nose region uses tension in the membrane (edge of the membrane stretched into sealing engagement due to tension applied to membrane) and/or pressure acting in the breathing chamber on the membrane (pneumatic seal) to provide a seal. layer is also provided in the The single nose ridge region and sides of the nose region to provide a softer and more flexible seal that avoids any potential for blocking the patient's nose, i.e., prevents excess pressure on the sides of the patient's nose or alar or flares which may cause the cartilage to collapse inwardly and potentially at least partially occlude the patient's airway.

Thus, the cushion assembly according to an example of the present technology provides different sealing mechanisms in different portions of the cushion.

For example, the cushion assembly may provide one mechanism of sealing in the superior portion of the cushion (e.g., sealing by tension in the membrane and/or a pneumatic seal) and a different mechanism of sealing in the inferior portion of the cushion (e.g., compression seal). In the illustrated example, the cushion assembly provides a compression seal via a dual layer or structure. membrane and undercushion However, it should be appreciated that the compression seal may be provided by alternative structures, e.g., gel-filled or foam-filled pocket, thicker single wall (e.g., 1.2mm about 0.8 to thick silicone).

RECTIFIED SHEET (RULE 91) ISA/AU Fig. 3-38 shows an example of the cushion assembly 250 engaged with the patient's face and under pressure or inflated of air at positive in use, i.e., supply pressure being applied to the cushion assembly shows a hatched area 250. Fig. 3-39 along the sealing portion of the cushion assembly 250 which illustrates a width or contact area 280 of the sealing portion engaged with the patient's face in use. The width or contact an inner area includes edge 280(i) (e.g., along the edge of the orifice) and an outer edge 280(o). Fig. 3-36 also shows the outer edge 280(o) of the contact area in dashed lines. As illustrated, a relatively narrow width of superior sealing portion 3102 may engage with the nose ridge to form a seal, e.g., depending on the shape of the nose with which it is being used. A relatively wider portion of superior sealing portion 3102 may engage with the skin adjacent lateral nasal cartilage to form a seal. In the inferior sealing portion 3104, substantially the entire width of the inferior sealing portion may engage the skin along the corner of nose region and top lip region to form a seal. Thus, the width or contact area of the sealing portion engaged with the patient's face in use may vary around the perimeter of the cushion assembly to form a seal. .2.1.6 Sealing Flap In an example, as shown in Figs., 3-14, 3-16, 3-20, 3-22, 3-26, 3-27, 3- , and 3-36, each side of nose region 253 of the sealing region includes a portion 270, e.g., a wing or sealing flap, that protrudes from the edge of the membrane 260 along its inner perimeter. As best shown in Figs. 3-35 and 3-36, each sealing flap 270 is adapted to form a seal on the region adjacent the junction between the nasal greater alar cartilage and the lateral nasal cartilage of a patient's nose (also referred to as the alar crease). The exact location of the sealing flap on a face in use may vary depending on the size and shape of the nose with which it is being used. [0002901 As illustrated, each sealing flap 270 is at least partially angled or pre- biased outwardly away from the breathing chamber of the cushion. When engaged with the patient's nose, the sealing flaps are deflected towards the breathing chamber which provides a bias for sealing in the junction noted above. That is, the shape, flexibility, and pre-bias of the sealing flaps allows the flaps to accommodate changes RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 in curvature vary when the or contour in this junction (e.g., which tend to continually maintain in use. nasal alar or "flare" in use) so as to seal and prevent leaks In an example, the sealing flange membrane 260 and sealing (including flap 270) defines T-shaped orifice. The the membrane 260 along a generally edge of its inner perimeter along with the edge of each sealing flap 270 along its inner perimeter cooperate to define an orifice 275 into the plenum chamber. In an example, such orifice 275 includes a general T-shape including an upper orifice portion 275(1) (along vertical axis v as viewed in Fig. 3-20) and a lower orifice portion 275(2) (along horizontal axis has viewed in Fig. 3-20) that extends generally transverse to the upper orifice 275(1). portion As best shown in Fig. 3-14, the sealing flap 270 changes the curvature and/or angle of the edge defining the orifice 275, i.e., edge of the orifice 275 curves upwardly and outwardly away from the breathing chamber at least along the sealing flap 270.

The curvature of the cushion may vary along the patient contacting surface of the membrane 260 in different regions of the cushion, e.g., to facilitate sealing in different regions of the patient's face.

For example, as shown in Fig. 3-14, the nose ridge region 252 and the, top lip region 255 each include portion in at least a that is locally saddle-shaped curvature, e.g., curves up in one direction dl and curves down in a different direction d2. Fig. 3-37 is another view of the cushion 250 illustrating such saddle-shaped curvature in the nose ridge region 252 and the top lip region 255.

It should be appreciated that the above-noted shapes of curvature are approximate shapes and should not be limited to strict mathematical definitions of such shapes.

In addition, it should be appreciated that regions may include similar curvature shapes, but the magnitudes of such curvature may be different. For the nose ridge region 252 and the top lip region at example, 255 may both include least a portion that is locally saddle-shaped, however the magnitude of curvature in RECTIFIED SHEET (RULE 91) ISA/AU and/or both principle directions of suchsaddle-shape in each may be different region. .2.2 Aperture 1000297] In an example, where a single mask should be used to fit about 85% of the female population, the undercushion aperture width (e.g., indicated at uw in Fig. 39 for example) is about 36mm to about 42mm, or about 38mm to about 40mm.

In an example, where a single mask should be used to fit about 85% of the male population, the undercushion aperture width is about 40mm to about 46mm, or about 42mm to about 44mm. In one form, to account for nose width variations of various ethnicities, to fit up to 95% of an average population, an undercushion aperture width is about 50mm to about 56mm, or about 52mm to about 54mm. 10002981 In an example, where a single mask should be used to fit about 85% of the female population, the membrane aperture width (e.g., indicated at mw in Fig. 3- -9 for example) is about 23mm to about 29mm, or about 25mm to about 27mm. In an example, where a single mask should be used to fit about 85% of the male population, the membrane aperture width is about 39mm to about 45mm, or about 41mm to about 43mm.

In one form, to account for nose width variations of various ethnicities, to fit up to 95% of an average population, a membrane aperture width is about 49mm to about 55mm, or about 51mm to about 53mm. .2.3 Plenum chamber 3200 10002991 Plenum chamber 3200 is formed in part by a side wall. In one form, the side wall includes side wall region 157 of sealing region 151. The plenum chamber has a perimeter 3210 that is shaped to conform generally surface contour of the to the face of an average person (e.g., see Figs. 3-8 and 3-9). In use, a marginal edge 3220 of plenum chamber of the 3200 is positioned in close proximity to an adjacent surface the face (e.g., see Fig. 3-10). Actual the seal- contact with the face is provided by forming structure 3100. In an example, in use the seal-forming structure 3100 extends about the entire perimeter 3210 of the plenum chamber 3200. In an example, plenum chamber is adapted to receive a portion of the patient's nose including the pronasale, e.g., the plenum chamber forms over and surrounds a portion of the cartilaginous framework of the nose including the pronasale.

RECTIFIED SHEET (RULE 91) ISA/AU In an example, the walls of the plenum chamber 3200 are flexible, or semi-rigid.

In an example, plenum chamber 3200 does not include a rigid frame or shell. In an example, the walls of the plenum chamber 3200 are not rigid, and, e.g., the walls of the plenum chamber 3200 are not floppy. In certain forms, flexibility of the walls of the plenum chamber 3200 assists to decouple a tube drag force from disrupting a seal.

In one form, the walls of the plenum chamber 3200 are moulded from a silicone rubber. In an example, the walls of the plenum chamber 3200 are constructed from a silicone rubber with a Type A indentation hardness of about 35 to about 40, and with a thickness in the range of about 2 mm to about 4mm. In certain forms of the present technology, the plenum chamber 3200 may have different thicknesses in different regions. .2.3.1 Side Wall Region Side wall region 157 may extend between sealing region 151 and attachment region 158. Side wall region 157 may be generally conical, that is, it may have a first diameter at proximate attachment region 158 and a second diameter proximate sealing region 151, with the first diameter being less than the second diameter. Side wall region may have a thickness of about 1.5-5mm, e.g., about 1.5- 3mm, e.g., about 2mm. Such a thickness may provide some support to the sealing region 151, prevent the elbow assembly 120 contacting the patient's nose, and ensure that the cushion does not collapse from headgear tension when in use.

Side wall region 157 may connect or be formed with headgear connectors 156. Such an arrangement may replace the need for a rigid frame or skeleton, as the headgear connectors are arrange proximal to the sealing region 151.

Headgear connectors 156 may be disposed on opposing sides of side wall 157. .2.3.2 Thinner Wall Section as best shown 3-30, the In an example, in Figs. 3-16, 3-18, 3-23, and side wall region 257 between the sealing region 251 and the attachment region 258 an area includes 268 adjacent the top lip region 255 of the sealing region that includes a thickness that is less than corresponding thicknesses adjacent the nose ridge, sides of RECTIFIED SHEET (RULE 91) ISA/AU nose, and region. That is, the area 268 includes corners of nose regions of the sealing a thinner of the sealing region. walled cross-section adjacent the top lip region 255 Such area 268 of thinner cross-section lessens the force provided by the sealing region along this section of the top lip region 255. For example, such area 268 provides less pressure along the top lip region 255 than the corners of nose region 254 (i.e., stiffer along the corners than the top rise or effecting of nose region lip region thereby giving relatively greater pressure along the corners of nose region (along the corners of the lip adjacent the alars), in order to avoid excessive pressure on the columella or septum of the patient's nose which is a more sensitive region of the patient's nose.

Figs. 3-22 to 3-30 show exemplary cross-sectional views through various regions of the cushion assembly 250. For example, Fig. 3-23 is a cross- sectional view through the nose ridge region 252 and the top lip region 255 showing the single layer or membrane 260 only structure in the nose ridge region 252 and dual layer or membrane 260 and undercushion 265 structure in the top lip region 255.

Fig. 3-23 also shows the thinner cross-section area 268 in the side wall region 257 adjacent the top lip region 255, e.g., to avoid excessive columella or pressure on the septum. In addition, 258 including thinner Fig. 3-23 shows the attachment region wall section 258(1), e.g., to permit decoupling of tube drag forces. 3-24 and 3-25 show the single layer or membrane 260 only structure in the sides of the nose region 253. Figs. 3-26 and 3-27 also show the single layer or membrane 260 only structure in the sides of the nose region 253 as well as at least part of the wing or sealing flap 270 that protrudes from the edge of the membrane 260. Fig. 3-27 and 3-28 show at least part of the headgear connector 256. 3-29 and 3-30 show the dual layer or in the corners of nose region 254 and membrane 260 and undercushion 265 structure 255. Fig. 3-30 shows the thinner cross-section area 268 in the side the top lip region wall region 257 adjacent the top lip region 255. .2.4 Positioning and stabilising structure 3300 the patient interface In an example, the seal-forming portion 3100 of 3000 of the present technology is held in sealing position in use by the positioning and stabilising structure 3300.

RECTIFIED SHEET (RULE 91) ISA/AU In one form, the seal-forming portion 3100 of the patient interface 3000 of the present is held a two-point connection technology in sealing position via to a positioning structure 3300. and stabilising In one form, the positioning and stabilising structure 3300 connects to plenum chamber 3200 via headgear connector 156.

In an example, there are only two connectors 156 to the plenum chamber 3200. .2.4.1 Headgear - Connector Headgear connector 156 may comprise a lug or interface 159 adapted to receive a cushion connector 116 on headgear 110. A similar arrangement is disclosed in PCT application number , filed 22 October 2008, which is incorporated herein by reference in its entirety.

Headgear connectors 156 may be positioned at an angle relative to the vertical axis of the sealing region 151. As best shown in Figs. 3-6 and 3-7, headgear connectors 156 may be positioned at angle a relative to the vertical axis of the sealing region 151. In an example, angle a may be approximately 90-135°. In an example, angle a may be approximately 90-120°.

In an example, angle a may be approximately 90-100°. Angle a aligns the headgear connectors in such a way so as to ensure a sealing force between the cushion and the patient is sufficient to effect a seal without causing discomfort causing the cushion example, the closer angle a or to collapse (for is to 180°, the more likely the cushion is to collapse inwardly towards the vertical axis when headgear in the tension is applied, thus pinching the patient's nose), particularly sides of the nose region 153 of sealing region 151.

In an alternative example, as best shown in Figs. 31, 33, 3 , 36, 31, 33, 35, 36, a hinge or thinner wall section 356(1), 456(1) may be provided to each headgear connector 356, 456 to enhance flexibility of the headgear connectors and allow sufficient bending in use so headgear tensioning force is not transferred to collapse the cushion inwardly, e.g., to avoid pinching of the alar under headgear tension. Also, as shown in Fig. 36, one or more wall sections 457(1) of the side wall region 457 between the lugs of the headgear connectors may RECTIFIED SHEET (RULE 91) ISA/AU be thickened, e.g., to prevent or reduce collapse of the side wall region under headgear tension.

Headgear connectors 156 may be positioned at an angle relative to the horizontal axis of the sealing region 151. As best shown in Fig. 3-9, headgear connectors 156 may be positioned at angle 13 relative to the horizontal axis of the sealing region 151. In an example, angle (3 may be approximately 90-135°. In an example, angle 13 may be approximately 90-120°. In an example, angle 13 may be approximately 90-100°. Angle 13 aligns the headgear connectors in such a way so as to ensure the sealing force provided by the headgear connectors 156 is distributed over the sealing region 151, with more force provided in the top lip region 155 and corners of the nose region 154, and less force provided in the nose ridge region 152. Such distribution may be more comfortable and stable.

As shown in Fig. 3-8, headgear connectors 156 may have a first width wi at a region proximal to the side wall 157, and a second width w2 at its extremity, with first width wl being; greater than second width an example, first width w2. In w1 may be about 15-50mm. In an example, first width w1 may be about 15-30mm. In an example, first width w, may be about 20-25mm. In an example, second width w2 may be about 15-30mm. In an example, second width w2 may be about 15 -25mm. In an w2 15-20mm. First width wi ensures that the example, second width may be about force provided by the headgear is spread from the sides of the nose region 153 to the region 154, and also stabilizes the cushion in the horizontal plane. corners of the nose Second width w2 is arranged to reduce the visual bulk of the headgear connector 156 and permit connection with cushion connector 116. proximal to the Headgear connectors 156 are advantageously disposed sealing region 151. Headgear connectors 156 are positioned at a height HI from sealing region 151, as shown on Fig. 3-6. In an example, height H1 may be approximately 10-50mm. In an example, height H1 may be approximately 10-30mm.

In an example, height HI may be approximately 10-20mm. In an example, height may be approximately 20-30mm. This arrangement ensures that headgear forces are translated directly to the sealing portion, and the sealing region is able to wrap or to the patient's conform nasal geometry.

RECTIFIED SHEET (RULE 91) ISA/AU position and size of the headgear connectors directs the sealing as to negate or eliminate the need for a force to the sealing region in such a way so forehead support or vertical headgear strap. For example, the width of the headgear connectors proximal to the side wall stabilizes the sealing region on the patient's face.

The height of the headgear connectors 156 to the sealing region 151 ensures that headgear forces are translated directly to the sealing portion, thereby eliminating the need for additional stabilization from a forehead support.

In an alternative form of the present technology, headgear connectors 156 are formed separately from the plenum chamber. .2.4.2 Headgear Assembly One form of positioning and stabilising structure 3300 in accordance with the present technology is headgear assembly 110. Headgear assembly 110 may be adapted to support, stabilize and/or position the cushion assembly 150 on the patient's face.

As shown in Figs. 3-1 to 3-3, headgear assembly 110 may comprise a pair of side straps 115, connected to a rear strap 118. Side straps 115 define a main headgear loop that may be positioned along the sides of the patient's face, across the patient's cheeks, extending between the eyes and the ears of the patient, e.g., overlaying at least a portion of the zygomatic bone, towards the crown of the patient's head where it e.g., overlays a portion of the parietal bone. Side straps 115 may have a cushion connector 116 adapted to receive a headgear connector 156 of cushion 150.

Side straps 115 may have an adjustment portion 117, wherein side straps 115 interlock or otherwise connect to each other and are able to adjust in length relative to one another. Rear strap 118 extends between the side straps and may loop through a respective slot 114 provided to the side straps 115. Rear strap 118 defines a rear headgear loop that may be positioned over the back of the patient's head, e.g., engaging along or below the patient's occiput. In an example, a portion of the headgear rear strap 118 or rear headgear loop overlays or engages a point on the head below' or inferior to the occipital bone, e.g. a portion of the strap lies on a portion of muscle, the occipital bone the trapezius adjacent in use. In an example, at least a the engages below or inferior portion of rear strap 118 a lower edge of the occipital RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 bone, which lower edge helps to maintain the rear strap in position and prevent the rear strap from riding up the patient's head, e.g., prevent sliding in a superior direction. Refer to for Figs. 2i and 3-2 location of the trapezius and an exemplary positioning of the rear strap 118 along a portion of the trapezius. In an example, the headgear straps are sufficiently stretchy or flexible, e.g., to enhance comfort and adjustability. For example, the headgear may not require length adjustment to don.

In one form, headgear assembly 110 comprises a silicone main portion and a fabric rear portion. In another form, headgear assembly 110 comprises a fabric main portion and a fabric rear portion.

In another form, headgear assembly 110 comprises a silicone main portion and a silicone rear portion.

In one form, headgear assembly 110 is constructed and arranged to be substantially floppy.

In one form, headgear assembly 110 comprises a main structural tie, and a rear structural tie.

An exemplary headgear assembly 110 is disclosed in PCT application number , filed 22 October 2008, which is incorporated herein by reference in its entirety. .2.5 Vent 3400 In one form, the patient interface 3000 includes a vent 3400 constructed and arranged to allow for the washout of exhaled carbon dioxide.

One form of vent 3400 in accordance with the present technology comprises a plurality of holes, for example, about 20 to about 80 holes, or about 40 to about 60 holes, or about 45 to about 55 holes.

In an example, the vent 3400 is located in a decoupling structure 3500, e.g. a swivel 3510. Alternatively, the vent 3400 is located in the plenum chamber 3200.

One form of vent 3400 in accordance with the present technology is vent 126. Vent 126 may permit to expiration of exhaled the nasal mask gases from RECTIFIED SHEET (RULE 91) ISA/AU system.

Vent 126 may comprise a series of holes, a mesh or other arrangement adapted to permit the flow of gas. In an example, vent 126 may be sufficiently rigid to avoid collapse of the air channels that exhaust the exhaled gas. Vent 126 may be positioned on the elbow 125 or other region such as the air delivery tube assembly 130 or cushion assembly 150 (including, for example, side wall 157). [0003281 In certain forms of the present technology, the vent 3400 may be constructed from a flexible, or floppy material that is supported by a sufficiently rigid frame to avoid collapse of the air channels that exhaust the exhaled gas. [0003291 In an alternative form, the patient interface 3000 does not include a vent. .2.6 Decoupling structure(s) 3500 [0003301 In one form the patient interface 3000 includes at least one decoupling structure 3500, for example a swivel 3510 or a ball and socket 3520 (e.g., see Fig. 3- 13). In one form, decoupling structure 3500 may be formed at least in part by attachment region 158. .2.6.1 Attachment Region Attachment region 158 may be adapted to receive elbow assembly 120.

Attachment region 158 may include a thinner wall section 158(1) than the side wall region 157, for example attachment region 158 may have a wall section of about 0.1- 1mm, for example about 0.2-0.8mm, for example about 0.5mm. In an example, the thinner wall section configured to permit of the tube forces 158(1) is decoupling drag from the sealing forces. At the opening end or aperture of the attachment region 158 is a lip portion 158(2) having a thickness of about 2 mm to 3 mm. Also, the lip portion 158(2) reduces the diameter of the opening end from the side wall region 157 of about 26 mm to 27 mm a 30% reduction to about 18 mm to 19 mm, which is approximately in diameter. The thickness and reduced diameter of the lip portion 158(2) assist with retention of the connector ring 128 of the elbow 125 with the cushion assembly 250.

RECTIFIED SHEET (RULE 91) ISA/AU .2.7 Connection port 3600 is made In one form, connection port 3600 to air circuit 4170 by elbow assembly 120 (e.g., see Figs. 3-1 and 3-2). .2.7.1 Elbow Assembly Elbow assembly 120 may be adapted to connect or serve as an interface 130. Elbow between the cushion assembly 150 and the air delivery assembly assembly 120 may be formed with or integral with the air delivery assembly 130, or cushion assembly 150. Elbow assembly 120 may also be adapted to permit exhaust of exhaled gases.

As shown in Figs. 3-1 to 3-3 and 3-11 to 3-13, elbow assembly 120 comprise an elbow 125, the elbow having a vent 126, the elbow connecting to or otherwise formed with connector ring 128. Elbow 125 may be formed with a ball joint and the connector ring 128, and may be constructed and arranged to permit rotation of the ball joint while ensuring a sufficient seal with the elbow 125 to ensure air leakage does not compromise the patient's treatment pressure. The ball joint provides a decoupling mechanism, e.g., decouple tube drag forces from sealing forces.

In one embodiment, the connector ring 128 is releasably or removably detachable from the elbow 125 by pulling the connector ring 128 off the elbow 125 to facilitate thorough cleaning of all surfaces of the connector ring 128 and elbow 125. The connector ring 128 has two raised edges 128(1), 128(2) that extend outwardly from the outer circumferential surface at the distal ends of the connector ring 128, i.e., a first raised edge or first flange on a first side of the ring adjacent an interior of the side cushion assembly in use and a second raised edge or second flange on a second of the ring adjacent an exterior of the cushion assembly in use. A channel 128(3) defined between the two raised edges 128(1), 128(2), as shown in Figs. 3-11 and 3-13, such channel 128(3) adapted to sealingly engage the lip portion 158(2) that defines 3-13, the the opening end or aperture of the attachment region 158. As shown in Fig. for directing the elbow 125 has a first opening 125(1) and a second opening 125(2) on the pressurised air through the elbow 125. The connector ring 128 is retained 125 at the second and rotatable elbow opening 125(2) of the elbow 125, is freely to the elbow shown in spherical or curved relative 125. As Fig. 3-13, the partially RECTIFIED SHEET (RULE 91) ISA/AU inner circumferential surface 128(4) of the connector ring 128 abuts the partially spherical, outer surface 125(3) of the elbow 125 which allows relative tilting between the connector ring 128 and elbow 125. In an example, the partially spherical surfaces of the ring 128 and the elbow 125 have approximately equal radii of curvature. As depicted in Fig. 3-13, when the centers of the connector ring 128 and second opening 125(2) of the elbow 125 are aligned, the first edge 128(1) of the connector ring 128 is co-planar to the edge 125(2)e of the second opening 125(2) of the elbow 125, i.e., annular surface provided by edge 125(2)e of the elbow 125 is flush with the annular surface provided by the first edge 128(1) of the ring 128 when the longitudinal axes of the elbow 125 and ring 128 are co-linear. Although Fig. 3-13 depicts the first edge 128(1) having substantially the same diameter as the second edge 128(2), it is possible that the first edge 128(1) may have a larger diameter than the second edge 128(2) (e.g., see Fig. 35). This may minimise inadvertent detachment of the elbow 125 to the cushion assembly 250 when the lip portion 158(2) of the attachment region 158 is retained within the channel 128(3) of the connector ring 128. When the lip portion 158(2) is engaged within the channel 128(3), it is locked into a fixed position and also unable to freely rotate relative to each other due to surface friction.

Elbow 125 may also be attached to or otherwise connected with swivel or swivel cuff 129, adapted to receive an air delivery tube assembly 130. Swivel 129 may be arranged such that it may form a seal or have a low leak with elbow 125, while still being able to freely rotate relative to elbow 125.

The swivel cuff 129 includes an annular engaging ring 129(1) that cuff received in an annular groove 125(4) of the elbow to rotatably connect the swivel The swivel cuff 129 also has a channel portion 129(2) defined 129 to the elbow 125. on an outer circumferential surface to matingly receive a cuff or connector 135 provided to the air delivery tube assembly 130. The swivel cuff 129 and the cuff or connector of the air delivery tube assembly 130 are removably detachable from each other. .2.8 Forehead support In an example, the patient interface 3000 does not include a forehead support, however in one alternative form, a forehead support may be included.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 .2.9 Anti-asphyxia In one form, the patient interface 3000 includes an anti-asphyxia valve. .2.10 Ports [0003391 In one form of the present technology, a patient interface 3000 includes one or more ports that allow access to the volume within the plenum chamber 3200.

In one form this allows a clinician to supply supplemental oxygen. In one form this allows for the direct measurement of a property gases within the plenum chamber 3200, such as the pressure. .2.11 Air circuit 4170 An air circuit 4170 in accordance with one form of the present technology is air delivery assembly 130. Air delivery assembly 130 may be constructed to connect a flow generator to mask system 100. As shown in Figs. 3-1 to 3-3, air delivery system 130 may comprise a tube 133 and a connector 135. Tube 133 may be relatively flexible. Connector 135 may be.adapted to receive swivel 129 of elbow assembly 120. .2.12 Donning and Removing The nasal mask system provides a small, unobtrusive mask system that is easy to don, easy to remove, is stable, comfortable, effective, provides wide-fit range, unobtrusive, easy to use, and adjustable. In addition, the nasal mask system provides a non-prong or non-pillows provides arrangement (i.e., nasal mask system nasal-type cushion that provides single orifice both nares in use) adapted to surround that does not suffer from problems of jetting effect, nor the potential discomfort associated with nasal prongs or pillows adapted to at least partially extend up the patient's nose. The nasal mask system is structured such that little or no adjustment may be needed to fit the nasal mask system to the patient's head. In an example, no forehead support is provided to the mask system, though one can be provided if desired.

In the illustrated example, the nasal mask system 100 provides a two- point connection with the cushion, i.e., two side straps 115 of the headgear assembly respective engage headgear connector 156 alongside of the cushion 150 (e.g., see RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 Figs. 3-1 to 3-3). The headgear assembly provides e.g., three adjustment points, adjustment portion 117 of the side straps 115 and respective adjustability of ends of the rear strap 118 with a respective slot 114 of the side straps 115. However, it should be appreciated or fewer adjustment that more points may be provided, e.g., side straps and rear strap may provide fixed length with no adjustability. 10003431 In an example, the two-point connection does not does not require engagement or disengagement of a clip in order to don or remove the mask system, i.e., no clips are provided to the mask system but they can be provided if desired.

Also, the main headgear loop defined by the side straps 115 extends from an inferior anterior position to a superior posterior position, which avoids any headgear strap extending below the ears (i.e., straps do not pass inferior to the patient's ear) as described below.

Figs. 3-31 to 3-34 provide a sequence of views to illustrate an exemplary method for fitting the nasal mask system to a patient, e.g. prior to application of air pressure to the plenum chamber. As shown in Fig. 3-31, the patient grasp the nasal mask system such that one hand holds the cushion assembly 150 in a manner to orient the sealing region towards the patient's face and the other hand holds the rear strap 118 in a manner to allow the main headgear loop defined by the side straps 115 to receive the patient's head. Then, as shown in Fig. 3-32, the cushion assembly is engaged with the patient's face, and the rear strap is held over the patient's head as it passes through the main headgear loop. The rear strap, along with the side straps attached thereto, may be pulled onto the patient's head until the rear strap is positioned along the back of the patient's head as shown in Fig. 3-33, i.e., straps rotated or pivoted about the cushion assembly onto the patient's head until the straps engage and self-locate onto the patient's head. Finally, as shown in Fig. 3-34, ends of the rear strap 118 and/or the adjustment portion 117 of the side straps may be adjusted as necessary to secure the nasal mask system on the patient's head.

This arrangement is simple to put on and take off as the straps do not have to be pulled down over the ears to don the mask system or pulled up over the ears to remove the mask system, i.e., headgear straps easily slid on/off over the RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 patient's that may be head like a cap. That is, the mask system includes headgear donned and removed like a cap without interfering with the ears of the patient.

In use, the side straps 115 are arranged to pull the nasal mask system in a superior posterior direction (e.g., as indicated by the arrow at in Fig. 3-34), which provides less compressive force along the nose ridge region of the cushion assembly 150 which is advantageous as such region is along a more sensitive region of the patient's nose, i.e., along the cartilage of the nose (not bone) as described above.

Masks with nasal-type cushions normally include headgear arrangements arranged to pull the mask along a direction that is substantially parallel to Frankfort horizontal (as indicated by the arrow a2 in Fig. 3-34) so as to provide a compressive sealing force substantially normal to the patient's face. To provide such force, the headgear arrangement includes straps that extend under the patient's ears so as to provide such force along the Frankfort horizontal direction. In the mask system according to an example of the present technology, the headgear assembly is arranged to pull the mask along the superior posterior direction, e.g., like an "under the nose" mask (e.g., pillows or cradle), which provides less compressive force along the nose ridge region while maintaining sufficient seal as noted above. Thus, the nasal mask system provides headgear that provides an effective sealing vector similar to "under the nose" masks (i.e., not parallel to Frankfort horizontal), but instead used for mask that covers part of the nose, i.e., the nasal mask system compromises sealing force strictly along the Frankfort horizontal for an over the ear headgear arrangement to facilitate donning. of plenum chamber .2.13 Pivoting adjustment distance h3 between a headgear Fig. 3-9 shows a perpendicular headgear tension as headgear connects to the cushion connection point hp, i.e., line of 150, and a pivoting point or rotation axis pp of the cushion assembly 150 on assembly the face, i.e., the top lip. This perpendicular distance h3 allows adjustment of the tension to effect rotational or pivotal adjustment of the plenum headgear pivoting point pp. As illustrated, the headgear chamber/cushion assembly about the connection point hp is superior to the pivoting point pp or point of contact of the assembly with the lip. This arrangement the cushion top enables a user to rotate/pivot RECTIFIED SHEET (RULE 91) ISA/AU cushion assembly via adjustment of headgear tension and to use only a two point headgear connection to accommodate different nose ridge geometry. In an example, increasing the perpendicular distance h3 will increase the moment.

Alternative Examples of Elbow Assemblies [0003481 Figs. 3-42 to 3-111 show elbow assemblies according to alternative examples of the technology. It should be appreciated that such elbow assemblies may be adapted for use with patient interfaces of the type described above. However, aspects of the technology may be adapted for use with other suitable interface types, e.g., nasal prongs, etc.

Swivel Elbow and Connector Assembly - Vented Connector or Ring Referring to Figs. 3-42 to 3-45, a swivel elbow and connector assembly 610 according to an example of the technology comprises a vented elbow connector, or ring, 620 and a swivel elbow 640. A sleeve 630 is provided between the vented elbow ring 620 and the swivel elbow 640. The sleeve 630 is provided between a first end of the swivel elbow 640 and the vented elbow ring 620. A swivel cuff 650 is provided to a second end of the swivel elbow 640 opposite the first end. The swivel cuff 650 comprises a swivel cuff annular engaging ring 651 that is received in an annular groove 643 of the swivel elbow 640 so that the swivel cuff 650 is rotatable, or swivelable, with respect to the swivel elbow 640. In one embodiment, the swivel cuff annular engaging ring 651 and connector ring 620 are made from nylon, and the elbow 640 is made from polypropylene.

The connector ring 620 and swivel cuff annular engaging ring 651 are inserted in an elbow mold. Next, the elbow 640 is molded while previously the molded connector ring 620 and molded swivel cuff annular engaging ring 651 is in the elbow mold. Since the connector ring 620 and swivel cuff annular engaging ring 651 are made from nylon their melt temperature is higher than the polypropylene molding temperature, and therefore they do not undergo plastic deformation when the elbow 640 that is made from polypropylene is molded. This process enables an accurate and snug fit between these three components 620, 651, 640 which addresses the problem of uncontrolled leak at the connection locations which has been a RECTIFIED SHEET (RULE 91) ISA/AU step problem in the past. Also, it eliminates at least one post-molding assembly 620 and ring usually required when attaching multiple plastic parts together, i.e., ring 651 The second are insert molded in the elbow mold at substantially the same time. end portion of the swivel elbow 640 also includes a tapered flange 644 that is received in an annular cuff elbow 640 to the groove 652 of the swivel 650 to secure the swivel swivel elbow 640 also includes an end portion 653 that is elbow 640. The swivel configured to be connected to an air delivery hose or conduit that is configured to deliver a flow of breathable gas generated by a flow generator, or blower. [0003511 Referring to Fig. 3-43, the vented elbow ring 620 comprises an inner flange 622 and an outer flange 623. A patient interface structure, e.g. cushion, 65 of a patient interface system may be fitted into a channel 624 of the vented elbow ring 620 defined by the flanges 622, 623. The cushion 605 may be a nasal cushion, a full face system may also cushion, or a nasal pillows or prongs cushion. The patient interface include, for example, a support structure, or frame, that supports the cushion 605; a tube, conduit, or hose configured to deliver a flow of breathable. gas to the cushion; and/or a patient interface positioning and stabilizing system (e.g. headgear). It should also be appreciated that the vented elbow ring 620 may be provided in, for example, the support structure or frame. usable with the swivel elbow [0003521 Referring to Fig. 3-72, a cushion 605 an upper lip and connector assembly 610 may include a sealing portion 6950 having 6962 that is supported by a supporting portion 6953. The sealing engagement portion 6950 is separated from the supporting portion 6953 by a front gap in an area portion of a nose tip engagement portion 6952. The nose tip engagement portion 6952 is but will be flexible and can extend downward when contacted by a patient's nose, nose tip limited in how far it can extend if it reaches the supporting portion 6953. The portion 6952 is extended in length from the aperture 6955 to fit nose tips engagement the nose tip of different size, so that the nose tip of different patients may engage the supporting engagement portion at different locations. A stem 6954 supports disclosed in, portion 6953 and the sealing portion 6950. The cushion 605 may be as International ( Al), for example, Application of which are incorporated herein by reference. However, it should the entire contents that the swivel elbow and connector assemblies herein may be appreciated disclosed RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 be used with other patient interface structures or systems, e.g. cushions, such as those disclosed in, for example, U.S. Application 61/443,623 or U.S. 2009/0044808 A1, entire contents of each being incorporated herein by reference. stem 6954 may receive the vented elbow ring 620. The vented elbow ring 620 may be inserted into the aperture of the cushion 605 such that the stem 6954 is sealingly located in the channel 624 between the flanges 622, 623. The sealing portion 6950, the stem 6954, and the supporting portion 6953 may be a flexible material such as liquid silicone rubber material or another elastomeric material, e.g., TPE, gel or foam. The stem 6954 and the supporting portion 6953 may be formed together such as in a mold, and the sealing portion 6950 may be formed separately and then joined together, e.g. such as by gluing. Alternatively, the stem 6954 and the supporting portion 6953 may be formed together such as in a mold, and then the sealing portion 6950 may be bonded to the supporting portion 6953 and the stem 6954 in the mold.

The cushion 605 may comprise a flexible gusset 6965, which may include the supporting portion 6953 and the stem 6954. The supporting portion 6953 and the stem 6954 may be formed as a single unitary element. The flexible gusset 6965 may be constructed of a silicone with a hardness of about 20 to 90 Shore A, preferably about 40 Shore A. The flexible gusset 6965 could also be made from polycarbonate, polypropylene, nylon, thermoplastic elastomer (TPE), HytrelTM, etc. 10003551 Referring again to Figs. 3-42 to 3-44, the vented elbow ring 620 comprises a plurality of vent slots 625 that extend through the inner flange 622 across the channel 624 and through the outer flange 623. As shown in Fig. 3-43, the sleeve 630 includes sleeve provided elbow a flange 631 between a flange 641 of the swivel 640 and the flange 623 of the vented elbow ring 620. As shown in Fig. 3-42, the connection of the sleeve 630 between the swivel elbow 640 and the vented elbow ring 620 provides a plurality of vents 621 for the venting of exhalation gases from the interior of the cushion 605 to the exterior of the cushion 605 through the vent slots 625.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 [0003561 The shape of the vent hole in one example of the present technology may be such that the cross section (e.g., round) is larger on or towards the inside (entry of air) compared to the smaller outside cross sections (e.g., diameter) where the exits to atmosphere. Also, the exit point or region may be angled to diffuse air away from bed partner/bed clothes, e.g., not perpendicular.

A smooth transition may be provided at the vent passage to help reduce/ensure low noise providing vents along the swivel effectively increase overall length of vents, which may allow for laminar flow development, and result in less noise.

The first end portion of the swivel elbow 640 includes a tapered flange 642 that engages an annular surface 632 of the sleeve 630. A cylindrical portion 633 of the sleeve 630 extends between the sleeve flange 631 and the tapered flange 642 of the swivel elbow 640. The sleeve 630in the swivel elbow 640 may be permanently assembled by the tapered flange 642 as shown in Fig. 3-43, although it should be appreciated that the sleeve 630 may be under molded, co molded or otherwise formed with the swivel elbow 640 to reduce assembly costs.

Referring to Fig. 3-42, the swivel elbow and connector assembly 610 may be provided with a plurality of vents 621, for example, 20-60 vents, for example -50 vents, for example 38 vents, 40 vents or 42 vents. The cross sectional area of the vents may vary from, for example, 0.5 mm x 0.5 mm, for example, 1.0 mm x 1.0 mm, or 0.7 mm x 0.7 mm.

The sleeve flange 631 and the flange 641 of the swivel elbow 640 may be provided at an angle that provides for venting of the exhalation gases from the interior of the cushion 605, 360° around the swivel elbow 640 and in direction away good diffusivity, and the vent from the face of the patient. The sleeve 630 provides path is contained and easily adjustable. The formation of the vents 621 by the sleeve 630 also reduces the noise of the venting from the interior of the cushion 605.

Although the vented elbow ring 620 is shown in Figs. 3-42 to 3-45 as circular, it should be appreciated that the vented elbow ring may be, for example, elliptical in cross section, as show in Figs. 3-76 and 3-77.

RECTIFIED SHEET (RULE 91) ISA/AU Swivel Elbow and Connector Assembly - Vented Elbow Figs. connector Referring to 3-73 to 3-78, a swivel elbow and assembly 6140 and a 6120 according to another example comprises a swivel elbow or ring, 6150. A cushion 6130 comprises a flexible base 6133 comprising connector, an aperture for sealingly receiving the ring 6150. The flexible base may comprise a flange, or stem, 6138 that is configured to be received in a channel 6154 of the ring 6150 that is defined between an inner flange 6152 and an outer flange 6153. The cushion 6130 may comprise nasal pillows 6131 for sealingly engaging the nares of a patient or user and connectors 6132 for connecting the cushion 6130 to a patient interface structure positioning and stabilizing system (e.g. headgear). The cushion 6130 may be as disclosed in, for example, International Application ( Al), the entire contents of which are incorporated herein by reference. It should be appreciated that other cushions or patient interface structures may also be used with the assembly 6120, including rigid or semi-rigid patient interface support structures (e.g. frames). first configured for connection 10003631 The elbow 6140 includes a end 6143 flange 6142 to, for example, a delivery hose or conduit. The elbow includes a tapered the first at a second end for securing the elbow 6140 to the ring 6150. Intermediate and second ends, the elbow 6140 includes an angled flange 6141 having a plurality of vents 6145 spaced around the flange 6141. The flange 6141 is angled with respect the longitudinal axis of the elbow 6140. The number and size of the vents may be as be distributed described above. It should also be appreciated that the vents 6145 may be appreciated around the angled flange 6141 evenly or randomly. It should further angled that the vents 6145 may not extend around the entire circumference of the in Fig. 3-76. flange 6141 of the elbow 6140, for example as shown flange 6141 that A radial flange 6146 may surround the angled 6150. The ring 6150 is secured between the engages the outer flange 6153 of the ring elbow 6140 may further tapered flange 6142 and the radial flange 6146. The a baffle 6144 the venting portion 6147 from an incoming flow of comprise to separate breathable gas from the first end 6143, although it may be circular or have other shapes as well.

RECTIFIED SHEET (RULE 91) ISA/AU (000365] Referring to Figs. 3-76 to 3-78, the ring 6150 may have an elliptical configuration (e.g. elliptical cross section). A circular radial flange 6155 may be provided on the ring 6150 to form a sealing interface with the radial flange 6146 of the elbow 6140.

As also shown in Fig. 3-76, the vents 6145 may not be provided around the entire circumference of the elbow, for example the lower portion 6159 the angled flange 6141 may not include vents 6145, and/or the angled flange 6141 may have a reinforced portion 6157 between vents 6145. As shown in Fig. 3-78, the baffle 6144 of the elbow 6140 also has an elliptical configuration that provides venting portions 6147 and non-venting portion 6149 to the elbow 6140.

Double Swivel Elbow and Connector Assembly - Vented Connector or Ring 1000366] Referring to Figs. 3-46 to 3-57, a double swivel elbow and connector assembly 660 according to a example comprises a ball and socket connection i.e. a ball joint vented elbow ring 670, a ball joint swivel elbow 680 swivelably connected to the ball joint vented elbow ring 670, and a swivel cuff 690 swivelably connected to the ball joint swivel elbow 680. The ball joint vented elbow ring 670 includes a plurality of vent slots 671 extending of the elbow ring 670. As around the periphery shown in Fig. 3-48, the slots 671 extend through an inner flange 673 of the elbow ring 670 and through an outer flange 674 of the elbow ring 670. A cushion 605 having an aperture may be received in a channel 675 between the inner flange 673 and the outer flange 674. When the elbow ring 670 is positioned in the aperture of the cushion 605, vent holes are created between the vent slots 671 in the elbow ring 670 and cushion 605. The cushion 605 is secured to the double swivel elbow and connector assembly 660 when the stem 6454 of the cushion is received in the channel 675 of the vented elbow ring 670. As used herein, the term "sealingly secured" means that the flow of breathable gas delivered to the patient interface system, e.g. cushion, through the swivel elbow will not pass from the interior to the exterior of the patient interface system through the vents in the absence of exhalation by the patient or wearer of the patient interface system.

Referring to Fig. 3-47, the vented elbow ring 670 includes an annular surface 672 that may be flush or in line with an annular surface 681 of the ball joint swivel elbow 680 when the double swivel elbow the and connector assembly 660 is in RECTIFIED SHEET (RULE 91) ISA/AU with the elbow pointing position or configuration shown in Figs. 3-46 to 3-48, i.e., swivel elbow 680 includes generally downward. As shown in Fig. 3-51, the ball joint an arcuate that is swivelably annular, or partially spherical, outer surface 682 contained by an arcuate annular, or partially spherical, inner surface 676 of the vented elbow ring 670. The vented elbow ring 670 and the ball joint swivel elbow 680 thus act as a ball joint connection between the vented elbow ring 670 and the swivel elbow 680. The inner 682 have radii of curvature that are surface 676 and the outer surface approximately equal. equal may be achieved by The substantially radii of curvature molding the vented elbow ring 670 and the swivel elbow 680 together, without the vented elbow ring 670 and the swivel elbow 680 chemically bonding or mechanically e.g., by shrinkage. The inner surface 676 and the outer surface bonding in the mold, area of contact between the surfaces so that no or 682 are engaged essentially over the little gas flows between the ring 670 and the elbow 680.

The swivel elbow 680 may swivel from the position shown in Fig. 3- 53, in which the annular surface 681 is flush with the annular surface 672 of the 680 are vented elbow ring 670 and the longitudinal axes of the ring 670 and the elbow the annular co-linear, to the position shown in Figs. 3-54, 3-56 and 3-57, in which 672, 681 are not flush and the longitudinal axes are at an angle to each other. surfaces swivel An annular junction 685 between the arcuate annular outer surface 682 of the of the elbow 680 and the end portion of the swivel elbow 680 limits the swiveling 3-57. elbow 680 within the vented elbow ring 670, as shown in Figs. 3-54, 3-56 and swivel elbow Referring to Figs. 3-51 to 3-57, the end portion of the ring 691 680 includes an annular groove 683 that receives a tapered annular engaging elbow 680 engages the of the swivel cuff 690. A tapered flange 684 of the swivel the swivel cuff 690 to retain the swivel cuff tapered annular engaging ring 691 of to the swivel elbow 680. As shown in Figs. 3-53 and 3-54, the swivel cuff to rotate from the includes an angled groove 692 that allows the swivel cuff 690 position shown in Fig. 3-53 to the position shown in Fig. 3-54.

Referring to Figs. 3-50 and 3-55, the pivoting of the swivel cuff 690 660 to allows a longitudinal axis of the double swivel elbow and connector assembly rotate through an angle a of, for example, 40-60°, for example 50°.

RECTIFIED SHEET (RULE 91) ISA/AU 10003711 for The double swivel elbow and connector assembly 660 allows swiveling of the connection of an air delivery tube or conduit to the swivel cuff end portion 693 in two directions. For example, as shown in Figs. 3-48 and 3-49, the swivel cuff 690 may swivel from the position shown in Fig. 3-48 to the position shown in Fig. 3-49 while the swivel elbow 680 remains in a position such that the annular surface 681 of the swivel elbow is flush with the annular surface 672 of the vented elbow ring 670. The transition from the alignment shown in Fig. 3-48 to the alignment shown in Fig. 3-49 is shown in Fig. 3-50 as a central axis of the swivel cuff 690 rotates through the angle a of, for example, 50°. The swiveling of the cuff 690 from the position shown in Fig. 3-48 to the position shown in Fig. 3-49 allows a short air delivery tube or conduit to straighten out thereby reducing torque forces applied to the vented elbow ring 670 and cushion 605. In other masks without this swivel, if the tube is pulled in a direction that is perpendicular to the central axis of the elbow, because the elbow has an L shaped configuration and no swivel, it cannot rotate to be in line with the tube; therefore this pulling force is directly applied to the mask and can disrupt the, seal. The ball joint (or ball and socket connection) design allows the elbow and the swivel to re-align depending on the forces being exerted by the tube. 1000372] The double swivel elbow connector assembly 660 also permits the swivel elbow 680 to swivel with respect to the vented elbow ring 670, for example, from the position shown in Fig. 3-54 to the position shown in Fig. 3-56. elbow 680 is limited by the annular junction The pivoting or swiveling of the swivel 682 of the swivel elbow 680 and the 685 between the arcuate annular outer surface from the end portion of the swivel elbow 680. The swivel elbow 680 may also swivel Fig. 3-57 while the swivel cuff position shown in Fig. 3-54 to the position shown in 690 may also pivot or swivel with respect to the swivel elbow 680.

Swivel Elbow - Vented Connector or Ring Triple and Connector Assembly 10003731 Referring to Figs. 3-58 to 3-71, a triple swivel elbow and connector assembly 660 according to another example comprises a second swivel cuff 6100 swivelably connected to the end portion of the swivel cuff 690. The second swivel cuff 6100 comprises a tapered annular engaging ring 6101 that is received in an annular groove 695 in the end portion of the swivel cuff 690. A tapered flange 694 is RECTIFIED SHEET (RULE 91) ISA/AU engaging provided at the end of the swivel cuff 690 to engage and retain the annular ring 6101 of the second swivel cuff 6100. The second swivel cuff 6100 includes an annular groove 6102 that receives the tapered flange 694 of the swivel cuff 690. The second swivel cuff 6100 includes an end portion 6103 that is configured to receive an air delivery tube or conduit for receiving a flow of breathable gas provided by a flow generator, or blower, for delivery into a patient interface including the cushion 605. [0003741 The swivel cuff 690 and the swivel elbow 680 of the examples shown in Figs. 3-58 to 3-71 are swivelable in the same manner as described with respect to the example disclosed in Figs. 3-46 to 3-57. As shown in Figs. 3-62 and 3-66, the pivoting of the swivel cuff 690 allows a longitudinal axis of the triple swivel elbow and connector assembly 660 to rotate through an angle 13 of, for example, 40-60°, for example 50°. Although the second swivel cuff 6100 is shown as including an annular groove 6102 that receives the tapered flange 694 of the swivel cuff 690, it should be appreciated that the second swivel cuff 6100 may be provided with an angled groove similar to the angled groove 692 of the first swivel cuff 690 to permit the second swivel cuff 6100 to swivel through an angle similar to the manner in which the swivel cuff 690 swivels with respect to the swivel elbow 680.

Swivel Elbow and Anti-Asphyxia Valve Assembly [0003751 Referring to Figs. 3-79 to 3-88, a swivel elbow and anti-asphyxia valve assembly 6300 according to an example of the technology may be provided having a diffuse vent. The assembly may also include engagement portions, e.g. buttons or actuators, for engaging and disengaging the assembly 6300 to a patient be molded in one piece. This interface, e.g. a mask. The assembly 6300 may is advantageous as the patient is not required to dismantle the component arrangement potential loss of components or misalignment when (thereby preventing reassembling), the cost of the component may be lower, and the anti-asphyxia valve such that it cannot be tampered with or accidentally removed. may be positioned [0003761 The assembly 6300 may comprise a first elbow component, base moulding, collar or skeleton portion 6200, as shown in Figs. 3-79 to 3-82. The skeleton portion 6200 may provide the underlying structure of the assembly 6300 to RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 support the assembly 3-79, the in an open or patent position. As shown in Fig. skeleton portion 6200 may include vent holes 6230 adapted to permit the exit of exhausted gases a patient interface as per previously described examples. As from shown in Fig. 3-82, the skeleton portion 6200 may further comprise a baffle 6260 adapted to separate the incoming gases from the outgoing gases in the assembly 6300 as per previously described examples. 10003771 The skeleton portion 6200 may also include a first connection region 6245 comprising engagement tabs 6240 for interfacing or connecting with a patient interface, for example. The first connection region 6245 may be substantially arcuate or define a first arcuate region when viewed from the front. The skeleton portion 6200 may also include a second connection region 6250 for interfacing or connecting with a tube or swivel, for example. The skeleton portion 6200 may further include a stop 6255 to position the assembly 6300 with respect to a mask, for example, and prevent the assembly 6300 from travelling through the connection with the mask or insertion of the assembly 6300 into the mask. rigid, or stiff, The skeleton portion 6200 may be formed of a relatively material so that the structure may remain open to permit the flow of gases. Stiffer materials may minimize the noise of the air exiting the vent holes. The skeleton or nylon. portion 6200 may be formed of, for example, polycarbonate, polypropylene, A rigid material may also assist in maintaining the assembly 6300 in an open position under certain loads, e.g. the patient lying on the assembly. A rigid material may also tube and/or swivel. be easier for the user to connect and disconnect from the mask, As shown in Fig. 3-80, the skeleton portion 6200 may further the first comprise supports, arms or interconnecting regions 6290 adapted to connect connection region 6250. The supports 6290 connection region 6245 with the second also form the boundaries of a first aperture 6210 and a second aperture 6220.

The supports 6290 may be flexible and resilient, i.e. the supports 6290 may return to their original shape after deformation. The first aperture 6210 may be structured and arranged to receive an anti asphyxia valve or other valve. The second aperture 6220 may be structured and arranged to receive a flexible member or web. The second RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 aperture 6220 may extend to an opening, gap or relief 6280 at the first connection region 6245, as shown in Fig. 3-81. 1000380] Referring to Fig. 3-80, the vent holes 6230, may be positioned on a surface 6235 that is generally circular or rounded to better diffuse exiting air streams.

The surface 6235 may be tapered to prevent moisture build up on the elbow - this can cause vent whistle i.e. air exiting the vent holes to create a high pitched whistle-like noise. The vent holes 6230 may be scattered around the surface 6235 to diffuse the air flow. It should be appreciated that the vent holes 6230 may be uniformly spaced around the surface 6235, or provided as otherwise described herein.

The skeleton portion 6200 may further include second supports or stops 6270 adapted to receive a button or other engagement mechanism.

The second supports 6270 may be adapted to transmit a force from an engagement feature or mechanism, such as a button, to the skeleton portion 6200. The second supports 6270 may also reinforce or provide a foundation for an engagement feature or mechanism, such as a button, such that when the button is pressed it does not collapse, rather it transmits a force to the skeleton portion 6200. The second supports 6270 may be an alignment feature to align the skeleton portion 6200 in a tool or mold. The second supports 6270 may form a surface for a second component, for example an over- mould, to abut or be formed against. 10003821 The skeleton portion 6200 may be over-moulded or otherwise formed with a second component (also referred to as a flexible portion or deformable region) 6335, e.g. an assembly over-mould. For example, the skeleton portion 6200 may be moulded in a first tool and then transferred to a for over-moulding with second tool the second component 6335, or could be done all in one tool. That is, second component 6335 may be chemically, mechanically or otherwise formed to the skeleton portion 6200. The second component 6335 may be formed of a relatively flexible material, such as thermoplastic elastomer (TPE), silicone, gel or other material. 1000383] The second component 6335 may include engagement portions 6320, a flexible member or web 6330, a lip 6315 and a valve member 6310. The RECTIFIED SHEET (RULE 91) ISA/AU engagement portions 6320 may be, for example, buttons, grips, tabs or other arrangements adapted to receive a pressing force a patient or or other motion from clinician. The engagement portions 6320 may be supported and/or reinforced by the second supports 6270. The engagement portions 6320 may, when pressed, squeeze towards one another thereby displacing the first supports 6290 inwards. The first supports 6290 may then deform the first connection region 6245 from a first, resting position (e.g. a circular shape) to a second, pressed position (e.g. an oval or elliptical shape). The gap or relief 6280 may be adapted to permit the first connection region 6245 to flex. This change in shape may move the engagement tabs 6240 from a first, engaged position, to a second, disengaged position. The gap or relief 6280 may form a second arcuate region, such that when combined with the first arcuate region of the first connection region 6245, the two components forni a circle and hence a cylinder.

The flexible member or web 6330 may be connected to the engagement portions 6320 and also seal the second aperture 6220. The flexible member 6330 may be in the form of a membrane or other readily deformable shape, as when engagement portions 6320 are pressed, the flexible member 6330 may buckle or bend. 10003851 The lip 6315 may be formed about and positioned around the perimeter of the first aperture 6210. The lip 6315 may be adapted to prevent objects from entering the first aperture 6210. The lip 6315 may also serve as a blank off for 6300. molding elbow assembly [000386J The valve member 6310, as shown in Fig. 3-87, may be positioned the body of the elbow assembly 6300, i.e. between the first supports 6290. The within valve member 6310 may act as an anti-asphyxia valve, i.e. when air is delivered from the second connection region 6250 to the first connection region 6245, the valve aperture member 6310 may move into a first position (not shown) to occlude the first 6210; and when there is no air being delivered from the second connection region 6250 to the first connection region 6245, the valve member 6310 may move to a second position (Fig. 3-87) that does not occlude the first aperture 6210, thereby permitting the patient to receive air from atmosphere through the first aperture 6210.

The valve member 6310 valve may be a flap. The member 6310 may be integrally RECTIFIED SHEET (RULE 91) ISA/AU formed with the second component 6335, e.g. through a living hinge attached to the lip.

It should be appreciated that the valve member 6310 may be formed separately from the second component 6335 and attached to the second component 6335. The valve member 6310 may be larger than the first aperture 6210, so as to occlude the first aperture 6210 when air is delivered from the second connection region 6250 to the first connection region 6245.

The valve member 6310, the lip 6315, the engagement portions 6320, and the flexible member 6330 may be formed from the same material in a single piece. Alternatively, one or more of these components may be formed separately and/or from an alternative material.

In a further example of the present technology, e.g., shown in Figs. 3- 109A to 3-111 an elbow 680 may be formed or constructed in a multi-step process, e.g., three step process, to achieve a single component with multiple functions. The elbow 6800 may comprise rigid or semi- a skeleton or frame 6805, e.g., constructed of rigid material, and adapted to communicate air flow from an air delivery tube to a mask. The skeleton 6805 may be first formed or molded in a tool. Skeleton 6805 may be constructed of a polymer such as polypropylene, polycarbonate, and nylon.

The elbow 6800 may an AAV valve) further comprise (anti-asphyxia 6810 having a flap to gas 6812 adapted provide the patient with access to atmospheric may be formed should a flow generator fail to deliver air to the mask. The AAV 6810 or molded within the skeleton 6805 or formed or molded and then subsequently the skeleton to 3-109D, assembled to 6805. For example, as shown in Figs. 3-109A an opening 6815 in the the AAV 6810 may be molded and then pulled through skeleton. A pull tab 6820 of the AAV may enable the AAV 6810 to be pulled through the opening 6815 so as to position, retain and/or seal the AAV relative to the skeleton. (e.g., pulled The pull tab 6820 may be a sacrificial component that once utilized through the opening) it may be cut off (such that an outer surface 6810.2 of an outer flange 6810.1 is substantially flush with the elbow surface) as shown in Fig. 3-110A or otherwise removed (e.g., once an inner flange 6825 is pulled and anchored against the inner surface of the skeleton, from further applied force will tear the pull tab away the AAV, possibly assisted by a perforation(s) between pull tab and outer flange RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 6810.1). Alternatively the AAV 6810 may in the opening 6815 and be molded extending through the skeleton 6805 without the need for 6820. The AAV pull tab 6810 may include an inner flange 6825 to seal the AAV 6810 inner wall against the 6830 of the skeleton 6805. [0003901 The elbow 6800 may comprise a flexible component 6832 (Fig. 3- 110A) adapted to secure the AAV 6810 in position and/or form one or more release buttons 6835 of the elbow 6800. For example, the flexible component 6832 may be a silicone or TPE which is molded over the skeleton 6805 to form the outer portions of the release buttons 6835, thereby allowing the release buttons 6835 to flex; and may be molded over the AAV 6810 at the opening 6830 to seal and hold the AAV 6810 in position relative to the skeleton 6805. [0003911 The arrangement may have one or more of the following advantages: 1. The AAV is sealed in position and cannot be removed from the elbow thereby preventing the patient from accidentally disassembling the AAV and thus rendering the device unsafe. 2. The flexible component can be molded in a single shot - if there was no flexible component over the AAV then the flexible component may be molded on either side of the elbow at each button. Since it is molded in a single shot, it may be more efficient and less expensive to tool 3. The elbow may be more visually appealing.

Swivel Elbow and Connector Assembly Including Cushion [0003921 Referring to Fig. 3-89, a patient interface system 6400 for delivering a flow of breathable gas to a patient may include a swivel elbow 6410, a swivel or ring or connector 6420, and a cushion 6430 for sealingly engaging the patient's airways. Although the cushion 6430 as shown includes nasal pillows or prongs or puffs, it should be appreciated that other cushions may be provided, for example a nasal cushion or a full face cushion. The swivel 6420 may be removably attachable to cushion 6430 the by a bayonet type connection 6440 that includes detents 6421 on the swivel 6420 to engage with tabs 6431 on the cushion 6430. Vents 6411 are provided RECTIFIED SHEET (RULE 91) ISA/AU between the elbow 6410 and the swivel 6420. The vents 6411 may include slots provided on the elbow surface to create venting gaps between the elbow 6410 and the swivel 6420. It should be appreciated that the in the swivel slots may be provided instead of the elbow, or that slots may be provided in both the elbow and the swivel. 10003931 Referring to Figs. 3-90 to 3-92, according to another example a patient interface system 6450 may include a swivel elbow 6460, a swivel or ring or connector 6470, and a cushion 6490. The swivel 6470 may be connected to a ring 6480 that is attached to the cushion 6490 at 6481. The ring 6480 may be permanently or removably attached to the cushion 6490. For example, the cushion 6490 may be overmoulded to the ring 6480 or the cushion 6490 and the ring 6480 may be attached by adhesive. As another example, the cushion 6490 and the ring 6480 may be press fit together. [0003941 The elbow 6470 or the 6460 may be removably attached to the swivel elbow may be permanently attached to the swivel 6470. The elbow 6460 may have flexible buttons 6462 provided between grooves 6463 formed in the elbow 6460. The buttons 6462 may be pressed or flexed to connect and disconnect the elbow 6460 from the swivel 6470.

Vents 6461 are provided between the elbow 6460 and the swivel 6470. The vents 6461 may include slots provided on the elbow surface to create venting gaps between the elbow 6460 and the swivel 6470. It should be appreciated that the slots may be provided in the swivel instead of the elbow, or that slots may be provided in both the elbow and the swivel.

Referring to Fig. 3-93, a patient interface system 6500 according to another example may include a swivel elbow 6510, a swivel or ring or connector 6520, and a cushion 6530. The cushion 6530 may be permanently or removably 6510 may be press fit to the swivel connected to the swivel 6520 at 6521. The elbow 6520 and be releasable by pressing buttons 6512 provided between grooves 6513 as per grooves 6463. Grooves 6463 are made air tight by either being thinned regions of material or an over-molded second material (e.g., TPE, silicone). The elbow 6510 RECTIFIED SHEET (RULE 91) ISA/AU may further include slots 6511 to vent exhaled gases and a baffle 6514 to reduce noise and increase exhaust gas washout.

Referring to Figs. 3-94 and 3-95, an elbow 5550 according to an example of the technology may include slots 6551 to vent exhaled and a baffle gases 6554 to reduce noise and increase exhaust gas washout.

An aperture 6552 may be provided in the elbow 6550 to permit the patient to breathe in the event that the flow breathable gas is interrupted or stopped. An AAV flap 6555 is provided to close the aperture 6552 when a flow of breathable gas is in the elbow 6550 (i.e. the flow breathable gas biases the flap 6555 into a closed position to cover the aperture 6552).

As shown in Figs. 3-94 and 3-95, the AAV flap 6555 is in the open position. The elbow 6550 may be moulded from, for example, a rigid material to improve vent flow noise and to prevent the slots 6551 from occluding. The AAV flap 6555 may be formed of, for example, a flexible material to enable movement of the AAV flap 6555 from the open to the closed position under the influence of the flow of breathable gas.

Elbow and Tube Connector Assembly Referring to Figs. 3-96 to 3-98, an elbow and tube connector 6580 that clips into assembly 6560 may include an elbow 6570 and a tube connector the inner surface of the elbow 6570. Clipping the tube connector 6580 into the elbow 6570 reduces the visual a tube- overall bulk of the assembly 6560 and may also create specific fitting such that only tubes 6590 provided by a certain manufacturer or provided can be used with the elbow 6570. 6571 adapted The elbow 6570 may include a lip or flexible element a groove, 6581 of the tube connector 6580 to to engage with an outer surface, e.g. ensure a more seal. The tube connector 6580 may a series of robust also include ridges 6582 adapted to engage with the inner surface of 6570, thereby the elbow causing a seal, while avoiding increased friction between the tube connector 6580 and the elbow 6570 to permit rotation of the components relative to one another.

Straight Swivel for Elbow and Tube Connection RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 to Figs. 3-99 Referring to 3-101, a tube and elbow connector assembly 6600 a swivel elbow and a swivel may include 6610, a tube connector 6630 or connector or ring 6620. The assembly 6600 may the elbow be used to connect 6610, such as the elbow disclosed in, for example, U.S. 2010/0307502 Al, the entire contents of which are incorporated herein by reference, tube, to a short retractable having a length of, for example 150 mm, such as disclosed in, for example, U.S. 2009/0078259 Al, the entire contents of which are incorporated herein by reference.

The assembly 6600 may reduce rotational / torque forces between the tube and the elbow. For example, as disclosed in U.S. 2010/0000534 Al, a patient interface system may include a "pillow cushion" that is adhesively applied to the patient's face.

As the patient interface system has no headgear, it therefore has little to no resistance to rotational forces being applied to the pillow cushion. The patient interface system may include a decoupling gusset, a ring elbow and a short, retractable tube attached to the elbow. A longer tube, e.g. a 2 m tube, may be connected to the short, retractable tube by a swivel. As the short, retractable tube is stretched, it may rotate almost a full revolution. This in turn rotates the elbow and distorts the pillow cushion and may pull the prongs or pillows out of the nose. In the patient interface of U.S. 2010/0000534 retractable tube assembly is designed to be 'semi-permanent' and have Al, the short, minimal leak through the tube-elbow interface. As such, there is no ability to rotate at the short, retractable tube and elbow interaction site and the elbow acts as a solid fixture and increases the torque onto the cushion. patient interface system, 10004011 By altering the location of the swivel in the for example by placing the swivel between the short, retractable tube and the elbow, tube would all the rotational forces of both the longer tube and the short, retractable be rotationally decoupled from the cushion. 10004021 By copying the geometry of the external surface of the elbow, and the internal surface of the short tube cuff and offsetting each by, for example, 0.2 mm, preferably 0.1 mm, there would be clearance between both parts. As the tube is stretched and starts to rotate, the surface with the least resistance will swivel. The swivel may either 'fuse' (i.e. not rotate) on one side, and rotate 100% on the other, or take up 50% of the rotation on either side so that the cushion would only experience a tensile force.

RECTIFIED SHEET (RULE 91) ISA/AU 10004031 Referring to Figs. 3-102 to 3-106, a tube and elbow connector assembly 6650 according to another example includes an elbow 6660 connectable to a tube or tube cuff 6690 by a swivel component 6670, 6680 made by, for example, overmoulding swivel component a first 6680 over a second swivel component 6670 in a mould assembly to form a freely rotating swivel in a smaller footprint, i.e. minimising the extension of the elbow length. The internal geometry of the cuff 6690 and the external geometry of the elbow 6660 were replicated fit with to ensure a tight no leak, yet the shrinkage of the in-mould assembly would allow a smooth rotation.

The swivel components 6670, 6680 form a two part swivel moulded as one.

Referring to connector Figs. 3-107 and 3-108, a tube cuff-to-tube cuff 6700 assembly may also provide a swivel configured to join cuffs 6710, 6730 of short tubes with no multiplication of the torque forces. A cuff connector 6720 may be provided between two short tubes of, for example, 150 mm in length, rather than one 300 mm tube with 100% clockwise torque force. The cuff connector 6720 connects the two short tubes, and each the two in different short tubes may be wound clockwise, 50% other's torque out. directions, (i.e. 50% anti-clockwise) to cancel each Static and Dynamic Sealing Positions Figs. 31 to 32 and 31 and 32 are exemplary views showing the cushion assembly 250 with the membrane 260 engaged with the patient's face in a static sealing position. Fig. 32 also shows the sealing flaps 270 engaged with the junction between the nasal major alar cartilage and the lateral nasal cartilage of the patient's nose as noted above.

Figs. 31 to 32 show the cushion assembly 250 in various dynamic sealing positions as the cushion assembly 250 adjusts to accommodate external forces applied to the cushion assembly, e.g., tube drag forces and tube torque provided applied to the cushion assembly 250. As illustrated, the thinner wall section to the attachment region 158 of the cushion assembly, the ball joint mechanism swivel provided provided by the the to the elbow assembly 120, and the flexibility membrane 260 and sealing flaps 270 permit sideways, upwards, and/or downwards RECTIFIED SHEET (RULE 91) ISA/AU forces to be applied by the elbow assembly while seal of the ensuring a sufficient cushion assembly with the patient's face.

In the illustrated example, the patient interface is provided with a decoupling system having multiple decoupling structures of tube to permit decoupling torque and/or tube drag forces from the sealing forces applied by the cushion assembly 250 to the patient's face. That is, the decoupling structures function together to absorb and/or displace forces applied by the air delivery tube so such tube forces do not adversely affect the sealing force provided by the cushion assembly 250 and forces provided by the headgear tension.

Decoupling Gusset The thinner wall section 158(1) (e.g., also referred to as a decoupling gusset or a decoupling wall) provided to the attachment region 158 of the cushion assembly provides sufficient flexibility and durability to allow the attachment region 158 to tilt, pivot or move relative to the side wall region 157. The thickness of the wall of the decoupling gusset 158(1) is thinner walls of the cushion than its adjacent assembly 250. Sufficient clearance is provided between the decoupling gusset 158(1) and the connector ring 128 supported by the attachment region 158, e.g., to prevent connector ring 128 and/or elbow 125 the decoupling gusset from piercing through 158(1) when tilting of the elbow 125 exceeds a predetermined angle. In one embodiment, the attachment region 158 has a width of about 6 mm to 7 mm, and the decoupling gusset 158(1) has a width of about 3 The decoupling gusset mm to 4 mm. 158(1) functions in a similar manner as a spheroidal joint because it enables relative motion around an indefinite number of axes between two components which have one common center.

Ball and socket joint/Spheroidal joint 10004091 The ball and socket joint provided by the elbow 125 and ring 128 allows for extra degrees of freedom of movement (i.e., in two planes) to permit rotation of the elbow 125 and provide a decoupling structure. For example, the ball and socket joint not only allows for full 360° rotation in the X-axis (see Fig. 31) but also adds an extra 35°, of rotational -40°, e.g., movement/tilt in the Z-axis (see RECTIFIED SHEET (RULE 91) ISA/AU Fig. 32). respect As a result, the elbow 125 can pivot, swivel, and/or rotate with to the ring 128 so that pulling forces (e.g., sideways, upwards, and downwards as shown in Figs. 31 to 32) and/or torque forces applied to the elbow 125 are not directly applied to the cushion assembly 250 and do not disrupt the seal with the patient.

The pivoting or swiveling of the elbow 125 relative to the ring 128 is limited by annular junction 127 between the partially spherical, outer surface 125(3) of the elbow 125 and the end portion of the elbow 125 (e.g., see Fig. 3-13). When the elbow 125 reaches this pivot or swivel point (e.g., annular junction 127 engages the edge 128(2) (see Fig. 3-13) of the ring 128), pulling forces are transferred to the decoupling gusset 158(1) which deforms or pivots as described above to allow further pivoting to permit decoupling of tube drag. The type of deformation for the decoupling gusset 158(1) is typically compressive on one circumferential side and stretching on the opposing circumferential side.

In an example, as shown in Fig. 31, a maximum angle al the elbow 125 is tilted upwards accommodated by the decoupling gusset 158(1) when relative to the cushion assembly 250 e.g., before deformation of the is about 9-10°, side wall region 157 of the cushion assembly occur. 250 starts to In an example, as shown in Fig. 31, a maximum angle a2 accommodated by the decoupling gusset 158(l) during downwards tilting is about 13-15°, e.g., before deformation of the side wall region 157 of the cushion assembly 250 starts to occur.

Swivel end or base of The swivel or cuff swivel 129 is provided to the lower tube assembly 130 e.g., short tube. As the elbow 125 and connects to the air delivery illustrated, the air delivery tube assembly 130 includes a tube 133 and a connector 135 adapted to receive swivel 129. As shown in Fig. the swivel cuff 129 comprises 3-13, cuff annular engaging that is a swivel ring 129(1) received in an annular groove 125(4) of the swivel elbow 125 so that the swivel cuff 129 is rotatable, or swivelable, with respect to the swivel elbow 125. The swivel cuff 129 allows for full 360° RECTIFIED SHEET (RULE 91) ISA/AU rotation in to the Y-axis (see Fig. 33), which provides a decoupling structure decouple the connection with the air delivery tube assembly 130.

Short Tube [0004141 In an example, as shown in Figs. 31 and 32, the air delivery tube assembly 130 may be in the form arranged to of a short tube interconnect the patient interface with tubing communicated with the PAP device. [0004151 As shown in Figs. 31 to 36, the short tube includes tube 133, end cuff or connector 135 provided to one end of the tube 133 and adapted to receive swivel 129, and end cuff or connector 137 provided to the opposite end of the tube 133 and adapted to receive swivel 136. The swivel 136 is adapted to engage the tubing communicated with the PAP device 4000. [0004161 The tube 133 is in the form of a helical tube which generates torque when the short tube is moved from its neutral state or original, retracted position (Fig. 31) to an extended position (Fig. 32). The tube 133 has a helical coil comprised of a plurality of adjacent coils each separated by a width and has an outer defining a web of material coaxial to surface coil diameter. The tube 133 also has a the helical coil that is attached, helical e.g., integrally bonded, to the helical coil. The coil and web of material may be made from a thermoplastic material such as TPE or TPU. 10004171 respective ends of the tube The end cuffs 135, 137 are overmolded to 133. The end cuffs 135, 137 are permanently connected to the tube 133. On the inner circumferential surface of the end cuffs 135, 137 are circular ridges to matingly receive and form a rotational relationship with components such as the elbow 125 and 6720. cuff connector 10004181 In the example shown in Fig. 35, the swivel cuff 129 is in the form of a swivel cuff annular engaging ring that is received in an annular groove or channel 125(4) provided to the end of elbow 125 to provide a rotatable connection with the elbow 125. The swivel cuff annular engaging ring 129 includes an annular groove or channel 129(2) along an outer circumferential surface to matingly receive RECTIFIED SHEET (RULE 91) ISA/AU the circular ridge 135(1) of the end cuff 135, The end cuff e.g., snap-fit connection. 135 is removably detachable from the ring 129. swivel cuff annular engaging shown in Fig. the swivel As 36, 136 is provided to a tube connector 138 structured to connect the swivel 136 to the end cuff 137 of the tube 133. As illustrated, one end of the tube connector 138 includes an annular groove or channel 138(1) along an outer circumferential surface to matingly receive the circular ridge 137(1) of the end cuff 137, e.g., snap-fit connection. The end cuff 137 is removably detachable from the tube connector 138. The opposite end of the tube connector 138 rotatably supports the swivel 136 to allow the swivel to rotate 360° with respect to the tube connector 138. The opposite end may include an outwardly tapered edge 138(2) to retain the swivel 136 to the tube connector 138.

As shown in Figs. 31 to 34, the exterior surface of the tube connector 138 may include finger grips 139 to facilitate manual attachment and detachment of the tube connector 138 and swivel 136 thereof to and from the tube 133 as well as tubing communicated with the PAP device finger 4000. As illustrated, such grip 139 may be a generally U-shaped protrusion provided sides of the on opposing tube connector 138. In example, raised branding and/or raised features may be provided within each U-shaped protrusion to assist in providing grip to the tube connector 138.

The swivel 129 provided to the elbow 125, as well as the swivel 136 provided to the end of the tube 133, are able to rotate up to 180° or more in order to absorb or redirect such torque such that it has little to no effect on the cushion assembly 250. In an example, the swivel 129 may rotate about 30° with minimal extension of the short tube 133, about 120° with intermediate extension of the short tube 133, and about 180° or more with full extension of the short tube. Both ends of the tube 133 are able to rotate 360° by virtue of the proximal swivel 129 and distal swivel 136. Elongation of the tube 133 causes the helical coil of the tube 133 to twist.

This tendency to twist is fully absorbed by both swivels 129, 136 and the tube 133 is easily and freely rotatable relative to the swivels 129, 136 without noticeable frictional resistance when the tube 133 is elongated from its neutral state (see direction arrow on Fig. 31). Therefore, elongation of the tube 133 does not RECTIFIED SHEET (RULE 91) ISA/AU transmit tube tube 133 torque forces to components connected downstream from the such as the elbow 125, seal-forming structure 3100 or a plenum chamber 3200.

Specifically, elongating the tube 133 in a direction parallel to the longitudinal axis of the tube 133 does not result in immediate rotation (and preferably, little to no rotation) of the elbow 125, which would typically be in the clockwise or anti-clockwise direction corresponding to the chirality (left or right handedness) of the helical coil of the tube 133. 1000422] In a typical scenario, a patient may don the patient interface 3000 and be sitting up prior to sleeping. The PAP device 4000 may be positioned on a bed side table next to the bed that the patient is seated on. Due to gravity, the tube 133 tends to elongate and the elbow 125 rotates to a downward position such that the first opening 125(1) of the elbow 125 faces the ground. The swivels 129, 136 decouple the rotation of the tube 133 when elongation occurs. When the patient falls asleep on their back or on their side facing away from the PAP device 4000, the ball and socket joint of the elbow 125 and swivels 129, 136 decouple tube drag forces. The angle of the elbow 125 is particularly suited in positions where the longitudinal axis of the tube 133 is perpendicular to the Frankfort horizontal direction. In a small proportion of the time, if the patient is sleeping on their side and faces the PAP device 4000, the elbow 125 is tilted up due to the tube 133 aligning and positioning itself to be co-linear with the opening end of the attachment region 158. When the elbow 125 has exceeded its maximum tilting range, the decoupling gusset 158(1) deforms to absorb the tube drag forces before the side wall region 157 of the cushion assembly 150 starts to deform and destabilise from the tube drag forces. A patient interface 3000 having a non- elbowed component (straight component) with a ball and socket joint is unlikely to the PAP experience tube drag forces when the patient is sleeping on their side facing device 4000, however would experience tube drag forces in every other position.

Therefore, an elbow 125 with a ball and socket joint is preferable for the majority of the time and majority of positions that the patient is in when they are receiving therapy instead of a non-elbowed component with ball and socket joint. (0004231 The decoupling system generally includes the ball and socket elbow 125, decoupling gusset 158(1) and tube 133 with dual swivel connections. In the embodiment where there is assembly headgear 110 with two-point connection to the RECTIFIED SHEET (RULE 91) ISA/AU cushion assembly 250 providing only decoupling system is two sealing vectors, the capable of impact over- minimising the of tube drag forces affecting stability without tightening of the headgear tension. In other words, caused by the any loss of stability type of headgear used is at least partially compensated by the decoupling system. This widens the range of headgear that could be used with the patient interface 3000 including unobtrusive headgear (with very little surface contact with the patient's face) without requiring a high and possibly uncomfortable level of headgear tension maintain a seal.

PAP DEVICE 4000 [0004241 A PAP device 4000 in accordance with one aspect of the present technology comprises mechanical and pneumatic components, electrical components and is programmed to execute one or more algorithms. In an example, PAP device has an external housing, e.g., formed in two parts, an upper portion 4012 of the external housing, and a lower portion 4014 of the external housing. In alternative forms, the external housing may include one or more panel(s) 4015. In an example, the PAP device 4000 comprises a chassis 4016 that supports one or more internal components of the PAP device 4000. In one form a pneumatic block is supported by, or formed as part of the chassis 4016. The PAP device 4000 may include a handle 4018. [0004251 In an example, pneumatic path of the PAP device 4000 comprises an inlet air filter 4112, an inlet muffler, a controllable source of air at positive pressure (e.g., a blower 4142), and an outlet muffler. One or more pressure sensors and flow sensors are included in the pneumatic path. [000426) In an example, pneumatic block a portion of the pneumatic comprises path that is located within the external housing. [0004271 In an example, the PAP device 4000 has an electrical power supply 4210, one or more input devices 4220, a processor, a pressure device controller, one or more protection circuits, memory, transducers, data communication interface and one or more output devices. Electrical components may be mounted on a single Printed Circuit Board Assembly (PCBA) device 4202. In an alternative form, the PAP 4000 may include more than one PCBA 4202.

RECTIFIED SHEET (RULE 91) ISA/AU [0004281 The processor of the PAP device 4000 is programmed to execute a series of algorithm modules in use, e.g., including pre-processing transducer signals module, a therapy engine module, a pressure control module, and further e.g., a fault condition module. .3 GLOSSARY [0004291 In certain forms of the present technology, one or more of the following definitions may apply. In other forms of the present technology, alternative definitions may apply. .3.1General [0004301 Air: Air will be taken to include breathable gases, for example air with supplemental oxygen. [0004311 Positive Airway Pressure (PAP): PAP treatment will be taken to mean application of a supply of air or breathable gas to the entrance to the airways at a pressure that is positive with respect to atmosphere. In one form, the pressure will be continuously positive (CPAP) and e.g., approximately constant through a respiratory cycle of a patient.

In some forms, the pressure at the entrance to the airways will vary by a few centimeters of water within a single respiratory cycle, for example being higher during inhalation and lower during exhalation. In some forms, the pressure at the entrance to the airways will be slightly higher during exhalation, and slightly lower during inhalation. In some forms the pressure will be a number of centimeters, e.g. about 5-15 cm of water pressure higher during inhalation than exhalation, and provide ventilatory support. In some forms, different the pressure will vary between respiratory cycles of the patient, for example being increased in response to detection of indications of partial upper airway obstruction, and decreased in the absence of indications of partial upper airway obstruction. .3.2 Anatomy of the face [0004321 Ala: the external outer wall or "wing" of each nostril (plural: alar) [0004331 Alare: The most lateral point on the nasal ala.

RECTIFIED SHEET (RULE 91) ISA/AU Alar curvature (or alar crest) point: most posterior point in the curved base line of each ala, found in the crease union of the ala with formed by the the cheek.

Auricula or Pinna: The whole external visible part of the ear. (nose) Bony framework: The bony framework of the nose comprises e.g. the nasal bones, the frontal process of the maxillae and the nasal part of the frontal bone. (nose) Cartilaginous framework: The cartilaginous framework of the nose comprises, e.g., the septa!, lateral, major and minor cartilages. (000438] Columella: the strip of skin that separates the nares and which runs from the pronasale to the upper lip.

Columella angle: The angle between the line drawn through the midpoint of the nostril aperture and a line drawn perpendicular to the Frankfurt horizontal while intersecting subnasale.

Frankfort horizontal plane: A line extending from the most inferior point of the orbital margin to the left tragion.

Glabella: Located on the soft tissue, the most prominent point in the midsagittal plane of the forehead.

Lateral nasal cartilage: A generally triangular plate of cartilage. Its the maxilla, and superior margin is attached to the nasal bone and frontal process of its inferior margin is connected to the greater alar cartilage. alar cartilage: lying below the lateral Greater A plate of cartilage nasal cartilage. It is curved around the anterior part of the nails. Its posterior end is connected to the frontal process of the maxilla by a tough fibrous membrane containing three or four minor cartilages of the ala.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 Nares (Nostrils): Approximately the ellipsoidal apertures forming entrance to the nasal cavity. The singular form of nares is naris (nostril). The nares are separated by the nasal septum.

Naso-labial sulcus or Naso-labial. fold: The skin fold or groove that runs from each nose to side of the the corners of the mouth, separating the cheeks from the upper lip.

Naso-labial angle: The angle between the columella and the upper lip, while intersecting subnasale.

Otobasion inferior: The lowest point of attachment of the auricle to the skin of the face.

Otobasion superior: The highest point of attachment of the auricle to the skin of the face.

Pronasale: the most protruded point or tip of the nose, which can be identified in lateral view of the rest of the portion of the head.

. Philtrum: the midline groove that runs from lower border of the nasal septum to the top of the lip in the upper lip region. the most anterior midpoint of the Pogonion: Located on the soft tissue, chin.

Ridge (nasal): The nasal ridge is the midline prominence of the nose, extending from the Sellion to the Pronasale.

Sagittal plane: A vertical plane that passes from anterior (front) to posterior (rear) dividing the body into right and left halves.

Sellion: Located on the soft tissue, the most concave point overlying the area of the frontonasal suture.

Septa! cartilage (nasal): The nasal septal cartilage forms part of the septum and divides the front part of the nasal cavity.

RECTIFIED SHEET (RULE 91) ISA/AU base, where the alar Subalare: The point at the lower margin of the alar base joins with the skin of the superior (upper) lip.

Located at which the Subnasal point: on the soft tissue, the point columella merges with the upper lip in the midsagittal plane.

Supramentale: The point of greatest concavity in the midline of the lower lip between labrale inferius and soft tissue pogonion .3.3 Anatomy of the skull Frontal bone: The frontal bone includes a large vertical portion, the squama frontalis, corresponding to the region known as the forehead. [0004601 Mandible: The mandible forms the lower jaw. The mental protuberance is the bony protuberance of the jaw that forms the chin.

Maxilla: The maxilla forms the upper jaw and is located above the mandible and below the orbits. The frontal process of the maxilla projects upwards by the side of the nose, and forms part of its lateral boundary.

Nasal bones: The nasal bones are two small oblong bones, varying in size and form in different individuals; they are placed side by side-at the middle and upper part of the face, and form, by their junction, the "bridge" of the nose.

Nasion: The intersection of the frontal two nasal bones, a bone and the depressed area directly between the eyes and superior to the bridge of the nose.

The occipital bone is situated at the back and lower Occipital bone: the foramen magnum, through which part of the cranium. It includes an oval aperture, the cranial cavity communicates with the vertebral canal. The curved plate behind the foramen magnum is the squama occipitalis.

Orbit: The bony cavity in the skull to contain the eyeball.

Parietal bones: The parietal bones are the bones that, when joined together, form the roof and sides of the cranium.

RECTIFIED SHEET (RULE 91) ISA/AU Temporal bones: The temporal bones are situated on the bases and sides of the skull, and support that part of the face known as the temple.

Zygomatic bones: The face includes two zygomatic bones, located in the upper and lateral parts of the face and forming the prominence of the cheek. .3.4 Anatomy of the respiratory system Diaphragm: A sheet of muscle that extends across the bottom of the rib cage. The diaphragm separates the thoracic cavity, containing lungs and the heart, ribs, from the abdominal cavity. As the diaphragm contracts the volume of the thoracic cavity increases and air is drawn into the lungs.

Larynx: The larynx, or voice box houses the vocal folds and connects the inferior part of the pharynx (hypopharynx) with the trachea.

Lungs: The organs of respiration in humans. The conducting zone of the lungs contains the trachea, the bronchi, the bronchioles, and the terminal bronchioles. The respiratory zone contains the respiratory bronchioles, the alveolar ducts, and the alveoli.

Nasal cavity: The nasal cavity (or nasal fossa) is a large air filled space above and behind the nose in the middle of the face. The nasal cavity is divided in two by a vertical fin called the nasal septum. are three On the sides of the nasal cavity horizontal outgrowths called nasal conchae (singular "concha") or turbinates. To the front of the nasal cavity is the nose, while the back blends, via the choanae, into the nasopharynx.

Pharynx: The part of the throat situated immediately inferior to (below) the nasal cavity, pharynx is and superior to the oesophagus and larynx. The conventionally divided into three sections: the nasopharynx (epipharynx) (the nasal part of the pharynx), the oropharynx (mesopharynx) (the oral part of the pharynx), and the laryngopharynx (hypopharynx).

RECTIFIED SHEET (RULE 91) ISA/AU .3.5 Materials or Silicone Elastomer: A synthetic rubber. In this Silicone specification, a to silicone is a liquid silicone rubber (LSR) or a reference reference to compression rubber available moulded silicone (CMSR). One form of commercially LSR is SILASTIC (included in the this trademark), range of products sold under manufactured by Dow Corning. Another manufacturer of LSR is Wacker. Unless otherwise specified to the contrary, an exemplary form of LSR has a Shore A (or Type A) indentation hardness in the range of about 35 to about 45 as measured using ASTM D2240. .3.6 Aspects of a patient interface Anti-asphyxia valve (AA V): The component or sub-assembly of a mask system that, by opening to atmosphere in a failsafe manner, reduces the risk of excessive CO2 rebreathing by a patient.

Elbow: A conduit that directs an axis of flow or air to change direction through an angle. In one form, the angle may be approximately 90 degrees. In another form, the angle may be less than 90 degrees. The conduit may have an approximately circular cross-section. In another form the conduit may have an oval or rectangular cross-section.

Frame: Frame will be taken to mean a mask structure that bears the load of tension between two or more points of connection with a headgear. A mask frame may be a non-airtight load bearing structure in the mask. However, some forms of mask frame may also be air-tight.

Headgear: Headgear will be taken to mean a form of positioning stabilizing structure designed for use on a head. In an example, the headgear of one or more struts, ties and stiffeners configured to locate comprises a collection and retain a patient interface in position on a patient's face for delivery of respiratory therapy. Some ties are formed of a soft, flexible, elastic material such as a laminated composite of foam and fabric.

RECTIFIED SHEET (RULE 91) ISA/AU 2013/170290 sealing portion and/or Membrane: Membrane, e.g., in the context of a has, e.g., face-contacting portion, will be taken to mean a typically thin element that substantially no resistance to bending, but has to being stretched. resistance will be taken to a mean Plenum chamber: a mask plenum chamber portion of a patient having walls a volume of space, the volume interface enclosing having air therein pressurised above atmospheric pressure in use. A shell may form part of the walls of a mask plenum chamber. In one form, a region of the patient's face forms one of the walls of the plenum chamber. be taken to mean a structure or Seal: The noun form ("a seal") will barrier that intentionally resists the flow of air through the interface of two surfaces.

The verb form ("to seal") will be taken to mean to resist a flow of air.

Shell: In an example, a shell will be taken to mean a curved structure having bending, tensile and compressive stiffness, a portion of a mask for example, that forms a curved structural wall of the mask. In an example, compared to its overall dimensions it is relatively thin. In some forms, a shell may be faceted. In an example, such walls are airtight, although in some forms they may not be airtight. to mean a structural component Stiffener: A stiffener will be taken designed to increase the bending resistance of another component in at least one direction. component designed to Strut: A strut will be taken to be a structural in at least one direction. increase the compression resistance of another component to rotate Swivel: (noun) A subassembly of components configured In one form, the about a common axis, e.g., independently, e.g., under low torque. an 360 degrees. In swivel may be constructed to rotate through angle of at least angle less than 360 another form, the swivel may be constructed to rotate through an degrees. When used in the context of an air delivery conduit, the sub-assembly of there is components, e.g., comprises a matched pair of cylindrical conduits. Preferably little or no leak flow of air from the swivel in use.

RECTIFIED SHEET (RULE 91) ISA/AU designed to resist Tie: A tie will be taken to be a structural component tension.

Vent: (noun) the structure that allows a deliberate controlled rate leak of air from an interior of the mask, or conduit to ambient air, to allow washout of exhaled carbon dioxide (CO2) and supply of oxygen (02). .3.7 Terms used in relation to patient interface Floppy: A quality of a material, structure or composite that is the combination of features of: Readily conforming to finger pressure.

Unable to retain its shape when caused to support its own weight.

Not rigid.

The quality of being floppy may have an associated direction, hence a particular material, structure or composite may be floppy in a first direction, but stiff or rigid in a second direction, for example a second direction that is orthogonal to the first direction.

Resilient: Able to deform substantially elastically, and to release substantially all of the energy upon unloading, within a relatively short period of time such as I second.

Rigid: Not readily deforming to finger pressure, and/or the tensions or loads typically epcountered when setting up and maintaining a patient interface sealing relationship with to a patient's airways. an entrance Semi-rigid: distort means being sufficiently rigid to not substantially under the effects of mechanical forces typically applied during positive airway therapy. pressure .4 OTHER REMARKS A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner the has no objection to RECTIFIED SHEET (RULE 91) ISA/AU facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever.

Unless the context clearly dictates otherwise and where a range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit, between the upper and lower limit of that range, and any other stated or intervening value in that stated range the technology. is encompassed within The upper and lower limits of these intervening ranges, which may be independently included in the intervening ranges, are also encompassed within the technology, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included in the technology.

Furthermore, where a value or values are stated herein as being implemented as part of the technology, it is understood that such values may be approximated, unless otherwise stated, and such values may be utilized to any suitable significant digit to the extent that a practical technical implementation may permit or require it.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood the art to by one of ordinary skill in which this technology belongs. Although any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present technology, a limited number of the exemplary methods and materials are described herein.

When a particular material is identified as being preferably used or as example similar being an to construct a component, obvious alternative materials with properties may be used as a substitute.

It must be noted that as used herein and in the appended claims, the singular forms "a", "an", and "the" include their plural equivalents, unless the context clearly dictates otherwise.

RECTIFIED SHEET (RULE 91) ISA/AU herein reference to All publications mentioned are incorporated by of those disclose and describe the methods and/or materials which are the subject publications. The publications discussed herein are provided solely for their disclosure Nothing herein is to be prior to the filing date of the present application. construed as an admission that the present technology is not entitled to antedate such publication invention. provided by virtue of prior Further, the dates of publication may be different from the actual publication dates, which may need to be independently confirmed.

Moreover, in interpreting the disclosure, all terms should be interpreted in the broadest reasonable manner consistent with the context. In particular, the terms "comprises" and "comprising" should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced.

The subject headings used in the detailed description are included only for the ease of reference of the reader and should not be used to limit the subject matter found throughout the disclosure or the claims. The subject headings should not be used in construing the scope of the claims or the claim limitations.

Although the technology herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely of the principles and applications of the technology. In some instances, illustrative the terminology and symbols may imply specific details that are not required to practice the technology. For example, although the terms "first" and "second" may be used, unless otherwise specified, they are not intended to indicate any order but may be utilised to distinguish between distinct elements. Furthermore, although process steps in the methodologies may be described or illustrated in an order, such an ordering is not required. Those skilled in the art will recognize that such ordering may be modified and/or aspects thereof may be conducted concurrently or even synchronously.

RECTIFIED SHEET (RULE 91) ISA/AU [0005031 be understood may be It is therefore to that numerous modifications made to the illustrative embodiments and may be devised that other arrangements without departing spirit and scope of the from the technology. 6 Reference signs list 100 mask system headgear assembly respective slot side straps 116 cushion connector 117 adjustment portion 118 rear strap 120 elbow assembly 125 elbow 125(1) first opening 125(2) second opening 125(2)(e) edge 125(3) partially spherical, outer surface 125(4) annular groove 127 annular junction connector ring 128(1) first raised edge 128(2) second raised edge 128(3) channel 128(4) curved inner circumferential surface 129 swivel cuff 129(1) annular engaging ring 129(2) channel portion 130 air delivery tube assembly 133 tube 135 connector 136 distal swivel 150 cushion assembly sealing region 152 nose ridge region 153 sides of the nose region 154 corners of the nose region 155 top lip region RECTIFIED SHEET (RULE 91) ISA/AU 156 headgear connectors 157 side wall region attachment region 158(1) decoupling gusset 158(2) lip portion lug or 159 interface 160 membrane 165 undercushion or backup band 250 cushion assembly 251 sealing region nose ridge region 253 sides of the nose region 254 corners of nose region 255 top lip region headgear connector 257 side wall region 258 attachment region 260 membrane 260-1 bead 265 undercushion 268 thinner cross-section area sealing flap 275 orifice 275(1) upper orifice portion 275(2) lower orifice portion 280 width or contact area 280(i) inner edge 280(o) outer edge 350 cushion assembly 356 headgear connector thinner wall section 356(1) 360 membrane 450 cushion assembly 456 headgear connector 456(1) thinner wall section 457 side wall region 457(1) wall sections 460 membrane 465 undercushion 605 cushion RECTIFIED SHEET (RULE 91) ISA/AU 610 swivel elbow and connector assembly 620 connector ring 621 vents 622 inner flange outer flange 624 channel 625 vent slots 630 sleeve 631 sleeve flange 632 annular surface 633 cylindrical portion 640 swivel elbow 641 flange 642 tapered flange 643 annular groove 644 tapered flange 650 swivel cuff 651 swivel cuff annular engaging ring annular groove 653 end portion 660 swivel elbow and connector assembly 670 elbow ring vent slots 672 annular surface 673 inner flange 674 outer flange 675 channel 676 inner surface ball joint swivel elbow 681 annular surface 682 arcuate annular outer surface 683 annular groove 684 tapered flange 685 annular junction swivel 690 cuff 691 tapered annular engaging ring angled 692 groove 693 swivel cuff end portion 694 tapered flange annular groove RECTIFIED SHEET (RULE 91) ISA/AU 1000 patient 3000 patient interface 3100 seal forming structure 3102 portion superior sealing 3104 inferior sealing portion 3110 sealing flange 3120 support flange 3200 plenum chamber 3210 perimeter 3220 edge marginal 3300 positioning and stabilising structure 3400 vent 3500 decoupling structure 3510 swivel 3520 ball and socket 3600 port connection 4000 pap device 4012 upper portion 4014 lower portion 4016 chassis 4018 handle 4112 inlet air filter 4142 blower 4170 air circuit 4202 pcba 4210 power supply electrical 4220 input devices 5000 humidifier 5550 elbow 6100 second swivel cuff 6101 tapered annular ring engaging 6102 annular groove 6103 end portion 6120 swivel elbow and connector assembly 6130 cushion 6132 connectors 6133 flexible base 6140 swivel elbow 6141 angled flange 6142 tapered flange RECTIFIED SHEET (RULE 91) ISA/AU 6143 first end 6144 baffle 6145 vents 6146 radial flange 6147 venting portions 6150 ring 6152 inner flange 6153 outer flange 6154 channel 6155 circular radial flange 6157 reinforced portion 6159 lower portion 6200 skeleton portion 6210 first aperture 6220 second aperture 6230 vent holes 6235 surface 6240 engagement tabs 6245 first connection region 6250 second connection region 6255 stop baffle 6260 6270 second supports 6280 gap or relief 6290 first supports 6300 elbow assembly 6310 valve member 6315 lip 6320 engagement portions 6330 flexible member 6335 second component 6400 patient interface system swivel 6410 elbow vents 6411 swivel 6420 6421 detents cushion 6430 6431 tabs 6431 tabs 6440 bayonet type connection RECTIFIED SHEET (RULE 91) ISA/AU 6450 patient interface system 6454 stem 6460 swivel elbow 6461 vents 6462 flexible buttons 6463 grooves 6470 swivel 6480 ring 6490 cushion 6500 patient interface system 6510 swivel elbow 6511 slots 6512 buttons 6513 grooves 6514 baffle 6520 swivel 6530 cushion 6550 elbow 6551 slots 6552 aperture 6554 baffle 6555 aav flap 6560 elbow and tube connector assembly 6570 elbow 6571 lip or flexible element 6580 tube connector 6580 tube connector 6582 ridges 6590 tubes 6600 tube and elbow connector assembly 6610 swivel elbow 6620 swivel 6630 tube connector 6650 tube and elbow connector assembly 6660 elbow 6670 second swivel component 6680 first swivel component cuff 6690 6710 cuff 6720 cuff connector RECTIFIED SHEET (RULE 91) ISA/AU 6730 cuff 6800 elbow 6805 skeleton 6810 aav 6810.1 outer flange 6810.2 outer surface 6812 flap 6812 flap 6815 opening 6815 opening 6820 pull tab 6825 inner flange 6830 inner wall 6832 flexible component 6835 release buttons sealing portion 6950 6952 nose tip engagement portion 6953 supporting portion 6954 stem 6955 aperture 6962 upper lip engagement portion 6965 flexible gusset RECTIFIED SHEET (RULE 91) ISA/AU JAWS Ref: 505857DIV1/130

Claims (1)

WHAT WE CLAIM IS:

1. A patient interface to deliver a flow of air at a positive pressure with respect to ambient air pressure to a patient while the patient is sleeping, to ameliorate sleep disordered breathing, the patient interface comprising: a cushion assembly comprising a seal-forming structure configured to seal with a region of the patient’s face surrounding an entrance to the patient’s airways and deliver the flow of air to at least an entrance of the patient’s nares; a first air conduit for receiving and delivering the flow of air to the cushion assembly, the first air conduit being stretchable and structured to twist when stretched; a first decoupling structure to decouple the seal-forming structure from rotational movement of the first air conduit as the first air conduit twists; a second decoupling structure to decouple the seal-forming structure from movement of the first air conduit, the second decoupling structure comprising: a ring, and an elbow, wherein the patient interface comprises an aperture, the ring being removably secured in the aperture with a substantially or completely air tight seal between the ring and the aperture, wherein the ring comprises a partially spherical inner surface and the elbow comprises a partially spherical outer surface, wherein the partially spherical inner surface and the partially spherical outer surface cooperate with each other to form a ball and socket joint to facilitate rotational movement of the elbow with respect to the ring in a plurality of axes, wherein the rotational movement of the elbow with respect to the ring is limited to a predetermined range of rotational movement in one or more of the plurality of axes, wherein the partially spherical inner surface and the partially spherical outer surface are structured to create a substantially or completely air tight seal between the partially spherical inner surface and the partially spherical outer surface; and wherein the patient interface further comprises a third decoupling structure to decouple the seal-forming structure from movement of the first air conduit after the elbow has reached a limit of the predetermined range of rotational movement. JAWS Ref: 505857DIV