Abstract: A gas washout vent for a patient interface may be configured to allow a flow of patient exhaled gas to an exterior of the patient interface to minimise rebreathing of exhaled gas by the patient and the vent may include: a plurality of vent passages extending between a first and a second side of the vent, each vent passage may include: a plurality of first openings extending from the first side towards the second side, said first openings being uniform in size and shape; a plurality of second openings extending from the second side towards the first side, said second openings being uniform in size and shape; and wherein the first openings and the second openings partially overlap each other at an interface to form constricted passages therebetween.

Abstract: Apparatus for generating a supply of air at positive pressure for the amelioration or treatment of a respiratory disorder comprising a housing, a blower structured and configured to produce a flow of air at positive pressure, a flexible connector electrically and physically connected to the blower; and a blower rotation limitation structure configured to reduce rotation of the blower during use. The apparatus may comprise first and second blower suspensions for holding opposite ends of the blower. The blower suspension(s) may be flexible and in tension. The apparatus may comprise one or more connector anchors for anchoring a longitudinal middle section of the flexible connector to another part of the apparatus.

Abstract: A patient interface includes a plenum chamber pressurisable to a therapeutic pressure, a seal-forming structure to maintain the therapeutic pressure in the plenum chamber, and a positioning and stabilising structure (PSS) to provide a force to hold a seal-forming structure on a patient's head. The PSS has at least one arm to be positioned adjacent to a cheek of the patient, and a strap removably received around the arm to contact a posterior region of the patient's head. The strap has a first coupling having a mechanical connector to engage the arm and limit movement of the arm into and out of the cavity, a second coupling spaced apart from an outer surface of the first coupling, and a sleeve being folded over the second coupling and positioned between the first and second couplings.

Abstract: A first part of a fluid connector system for delivery of pressurized breathing gas to a patient from a respiratory pressure therapy device. The first part has a connector portion with a first opening for a fluid flow, a sealing surface around a periphery of the first opening, and a retaining portion axially aligned with the sealing surface. The sealing surface is configured to axially receive a seal portion extending around a periphery of a second opening to form a face seal with a second part of the fluid connector system. The retaining portion is configured to be releasably engaged with a retaining portion of the second part of the fluid connector system.

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

Abstract: An exchanger conduit permits temperature and/or humidity conditioning of a gas for a patient respiratory interface. In an example embodiment, a conduit has a first channel and a second channel where the first channel is configured to conduct an inspiratory gas and the second channel configured to conduct an expiratory gas. An exchanger is positioned along the first channel and the second channel to separate the first channel and the second channel. The exchanger is configured to transfer a component (e.g., temperature or humidity) of the gas of the second channel to the gas of the first channel. In some embodiments, an optional flow resistor may be implemented to permit venting at pressures above atmospheric pressure so as to allow pressure stenting of a patient respiratory system without a substantial direct flow from a flow generator of respiratory treatment apparatus to the patient during patient expiration.

Abstract: A patient interface for delivering breathable gas to a patient includes a sealing portion including a nose tip engagement portion adapted to form a seal with the patient's nose tip, an upper lip engagement portion adapted to form a seal with the patient's upper lip and/or base of the patient's nares, and nostril engagement flaps adapted to form a seal with the patient's nares. The nose tip engagement portion, the upper lip engagement portion, and the nostril engagement flaps are all structured to extend or curve outwardly from a supporting wall defining an air path.

Abstract: A sensor module assembly for a respiratory therapy apparatus may be configured for a seal-based securement within a respiratory therapy device that includes a separable pneumatic block to make assembly or replacement more efficient. The sensor module assembly may include a flow manifold. The flow manifold may have an inlet and an outlet and a main pneumatic path between the inlet and the outlet. The assembly may have a sensor module with sensor(s) on a printed circuit board. The sensor module may be pneumatically and fixedly coupled to the flow manifold. The inlet of the flow manifold may be configured for removable coupling with an outlet of the pneumatic block assembly. Moreover, the outlet of the flow manifold may be configured for removable coupling with a pneumatic path of a housing panel of the respiratory therapy apparatus. The pneumatic path is adapted for supplying breathable gas to a patient interface.

Abstract: A ventilator that delivers air at different pressures to a patient during inspiratory and expiratory cycles of breathing and that cycles from inspiratory to expiratory operation when the patient's respiratory flow passes a threshold level. The threshold generally increases from the beginning of inspiration to the end of inspiration. The increase can be linear over all or only a portion of the inspiratory cycle, and the threshold can be adjusted so that cycling is prevented during the initial portion of an inspiratory cycle. The minimum and maximum levels may both be functions of peak flow and the threshold may increase as a function of elapsed inspiratory time. The rate at which the threshold increases from a minimum level to a maximum level may be adjustable for individual patient needs and may be determined from previous breaths.

Abstract: A patient interface includes a plenum chamber pressurisable to a therapeutic pressure, and a seal-forming structure constructed and arranged to seal with a region of a patient's face surrounding an entrance to a patient's airways. The seal-forming structure is constructed and arranged to maintain the therapeutic pressure in the plenum chamber throughout a patient's respiratory cycle in use. The patient interface also includes a positioning and stabilizing structure configured to hold the seal-forming structure in a therapeutically effective position on a patients head. The positioning and stabilizing structure includes a rear strap arranged to contact an occiput of the patient's head. The rear strap is constructed from a first material is arranged to contact a temporal region of the patient's head, and a second material arranged to contact the occiput of the patients head. The second material is silicone.

Abstract: A cuff for an air delivery conduit includes a first end portion provided to a tube and a second end portion adapted to engage a tubular connector. The second end portion includes an annular bead for sealing and retention.

Abstract: Methods and systems estimate cardio-respiratory parameter(s), such as from in-phase and quadrature channels. The channels may represent patient chest movement and may be generated with a sensor, such as a contactless sensor that may sense movement with radio-frequency signals. In the methods/systems, the in-phase and quadrature channels may be processed, such as in a processor(s), using relative demodulation to generate cardio-respiratory parameter estimate(s). Optionally, the processing produces a jerk signal that may be filtered for producing a heart rate estimate, such as from zero-crossings of the filtered signal. Optionally, the processing produces a chest velocity signal that may be filtered for producing a respiratory rate estimate, such as from zero-crossings of the filtered signal.

Abstract: A mask system and an air delivery conduit for use in the treatment of respiratory disorders. The air delivery conduit may comprise a textile having an airtight arrangement. A support structure may be provided to the conduit to provide form.

Abstract: An apparatus for providing a supply of humidified pressurized breathable gas to a patient interface, the apparatus comprising: a flow generator configured to pressurize a supply of breathable gas; a humidifier configured to provide water vapour to humidify the supply of pressurized breathable gas; a heated tube configured to be connectable to the humidifier to heat and deliver the humidified supply of breathable gas to the patient interface; a sensor configured to measure a property of the humidified supply of breathable gas in the heated tube; a controller configured to control power provided to the heated tube and control operation of the flow generator; and a set of low pass filters coupled between the sensor and the controller and/or a set of high pass filters coupled between the sensor and ground.

Abstract: A respiratory treatment apparatus and method in which a leak is determined by using an averaging window. The window starts at the present time and extends back in time to a point determined according to a current one of progressively detected phase measures of a first respiratory cycle and a corresponding phase measure attributable to a preceding second respiratory cycle. In another aspect, a jamming index indicates whether the leak is rapidly changing. To the extent that jamming is high, the leak estimate used progressively changes from that using sliding breath-window averaging to a more robust and faster responding low-pass filter method, and adjustment of ventilatory support based on measures employing estimated respiratory flow is slowed down or stopped.

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

Abstract: A patient interface structure includes a cushion configured to sealingly engage the patient's face and a front that is more rigid than the cushion. The cushion includes a forward opening, a rearward opening that is opposite the forward opening and a continuous sealing surface. The continuous sealing surface has a mouth sealing portion configured to seal around the patient's mouth and a nasal sealing portion configured to seal around both of the patient's nasal airways. The front plate includes an air inlet configured to both receive the pressurized respiratory gas and secure headgear to the patient interface structure. In addition, the nasal sealing portion includes at least one aperture that is separate from the rearward opening. Also, the front plate, the mouth sealing portion and the nasal sealing portion together form a common chamber.

Abstract: A patient interface for delivery of a supply of pressurised air or breathable gas to an entrance of a patient's airways comprising: a cushion member that includes a retaining structure and a seal-forming structure permanently connected to the retaining structure; a frame member attachable to the retaining structure; and a positioning and stabilising structure attachable to the frame member.

Abstract: An interfacing structure for a mask system includes a cushion component adapted to contact the patient's face in use and a cushion-to-frame component provided to the cushion component. The cushion-to-frame component is structured to secure the cushion component to a mask frame of the mask system. The cushion-to-frame component includes a cushion side adapted to interface with the cushion component and a frame side adapted to interface with the mask frame. The cushion side includes a platform to engage and support the cushion component. The platform provides an engagement surface to engage the cushion component and inner and outer flanges provided to opposing ends of the platform to guide, support and/or retain the cushion component on the platform.