US Pat. No. 10,507,297

DELIVERY OF RESPIRATORY THERAPY

ResMed Pty Ltd, Bella Vi...

1. A mask system to deliver respiratory therapy to a patient, the mask system comprising:a patient interface that defines a breathing chamber and is shaped to seal against a face of the patient and deliver pressurized air from the breathing chamber into airways of the patient during use, the patient interface defining a first passage for introduction of pressurized air into the breathing chamber at a first lateral side of the patient interface and a second passage for introduction of pressurized air into the breathing chamber at a second lateral side of the patient interface that opposes the first lateral side of the patient interface;
a first conduit to introduce pressurized air into the breathing chamber of the patient interface through the first passage, the first conduit structured to engage against a first side of a head of the patient during use, the first conduit having a D-shaped cross-sectional shape such that a relatively flat, inwardly-facing portion of the D-shaped cross-sectional shape of the first conduit is oriented to sit substantially flush against the face of the patient during use while a curved, outwardly-facing portion of the D-shaped cross-sectional shape of the first conduit is oriented away from the face of the patient during use, wherein the D-shaped cross-sectional shape of the first conduit varies along a longitudinal length of the first conduit, wherein the first conduit maintains an approximately constant hydraulic diameter along the longitudinal length of the first conduit; and
a second conduit to introduce pressurized air into the breathing chamber of the patient interface through the second passage, the second conduit structured to engage against a second side of the head of the patient during use, the second conduit having the same D-shaped cross-sectional shape as the first conduit such that a relatively flat, inwardly-facing portion of the D-shaped cross-sectional shape of the second conduit is oriented to sit substantially flush against the face of the patient during use while a curved, outwardly-facing portion of the D-shaped cross-sectional shape of the second conduit is oriented away from the face of the patient during use, wherein the D-shaped cross-sectional shape of the second conduit varies along a longitudinal length of the second conduit, wherein the second conduit maintains an approximately constant hydraulic diameter along the longitudinal length of the second conduit.

US Pat. No. 10,393,142

QUIET BLOWER APPARATUS AND SYSTEM AND METHOD FOR REDUCING BLOWER NOISE

ResMed Pty Ltd, (AU)

1. A method for reducing noise generated by a blower, the method comprising:housing the blower in an enclosure which includes an inlet section including an inlet port, at least one intermediate section and an outlet section including an outlet port, the inlet section and the outlet section being separated by one or more flexible membranes, the outlet section having a higher pressure than the inlet section in use; and configuring the one or more flexible membranes to expand into the inlet section and thereby acoustically couple the inlet section and outlet section.

US Pat. No. 10,342,939

DETECTION OF VENTILATION SUFFICIENCY

ResMed Pty Ltd, (AU)

1. A method for controlling a processor to assess sufficiency of ventilation from a measured flow of breathable gas, the method comprising:measuring, by way of a sensor, a flow of breathable gas representative of patient respiration;
deriving measures of ventilation from the measure of flow;
determining, with a processor, a histogram including the measures of ventilation, wherein the measures are volumes of breathable gas measured over a time interval; and
evaluating the histogram in the processor and, based on the evaluation, outputting an indication of occurrence of hypoventilation.

US Pat. No. 10,342,941

METHODS AND APPARATUS FOR CONTROLLING MASK LEAK IN CPAP TREATMENT

ResMed Pty Ltd, Bella Vi...

1. An apparatus configured for sealed delivery of a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to an entrance of a patient's airways including at least an entrance of the patient's nares while the patient is sleeping to treat sleep disordered breathing (SDB), the apparatus comprising:a blower configured to generate and pressurize the flow of breathable gas; and
a controller configured to (1) adjust the blower to increase the pressure of the breathable gas when a treatment pressure is below a predetermined threshold, (2) determine whether the increase in the pressure of the breathable gas resulting from the adjustment of the blower is less than a predetermined increase in the treatment pressure and (3) generate the flow of breathable gas at a reduced positive pressure or inhibit a further increase in the pressure of the breathable gas when the increase in pressure resulting from the adjustment of the blower is less than the predetermined increase in the treatment pressure.

US Pat. No. 10,342,945

RESPIRATORY MASK HAVING GAS WASHOUT VENT AND METHOD FOR MAKING THE MASK

ResMed Pty Ltd, Bella Vi...

1. A respiratory mask assembly for use with a system for supplying breathable gas pressurized above atmospheric pressure to an airway of a patient for treatment of sleep disordered breathing, the respiratory mask assembly comprising:a mask including a shell and a seal,
wherein the mask forms an interior pressurizable to a therapeutic pressure above atmospheric pressure,
wherein the shell includes an aperture structured to receive a flow of air at the therapeutic pressure for breathing by the patient,
wherein the seal is constructed and arranged to form a seal with a patient's nose and/or mouth; and
headgear structured and arranged to retain the mask over the patient's nose and/or mouth;
wherein the mask further comprises a washout vent, the washout vent comprising:
a solid mask section; and
a vent orifice extending through a thickness of the solid mask section and adapted for gas washout, wherein said vent orifice includes opposed side walls providing a flow passage that allows gas to flow along the opposed side walls from the interior of the mask to atmosphere in use, and the opposed side walls defining at least a portion of a conic section having a length greater than its width,
wherein the vent orifice includes an orifice inlet at the interior of the mask and an orifice exit open to atmosphere, and the opposed side walls converge along their entire length from the orifice inlet to the orifice exit to reduce noise of gas washout.

US Pat. No. 10,342,950

HUMIDIFIER RESERVOIR

ResMed Pty Ltd, Bella Vi...

1. A water reservoir for an apparatus for humidifying a flow of air for delivery to an entrance of the airways of a patient for respiratory therapy, comprising:a base portion configured to hold a predetermined maximum volume of water,
the base portion including an overfill protection element configured and arranged to prevent filling the base portion above the maximum volume of water;
a lid portion movably connected to the base portion to allow the water reservoir to be convertible between an open configuration and a closed configuration, the lid portion comprising an inlet and an outlet;
a compliant portion configured to sealingly engage the lid portion and the base portion when the water reservoir is in the closed configuration;
wherein the overfill protection element comprises at least one orifice or a sloped profile, the sloped profile being in a side profile of the base portion, and the at least one orifice or the sloped profile defines an egress path of water when the maximum volume of water is exceeded;
wherein, in the closed configuration of the water reservoir, the compliant portion is configured to block or seal the at least one orifice or sloped profile to prevent fluid communication into and out of the water reservoir through the at least one orifice or sloped profile; and
wherein, in the open configuration of the water reservoir, the at least one orifice or sloped profile is configured so that excess water above the maximum volume of water will spill out via the at least one orifice or sloped profile when the maximum volume of water is exceeded and the base portion is in its normal, working orientation.

US Pat. No. 10,328,222

VENT DEVICE FOR USE WITH A RESPIRATORY DEVICE

ResMed Pty Ltd, (AU)

1. A vent device suitable for use with a respiratory device for delivering a supply of air or breathable gas to the entrance of a patient's airways for the amelioration or treatment of a respiratory disorder comprising:a first vent comprising a first size adjustable central aperture on a plenum chamber of a mask;
a second vent comprising a second size adjustable central aperture on the plenum chamber of the mask with said first vent;
a first actuator assembly on the mask to automatically vary a first property of the first vent in response to a first control system signal for adjusting the central aperture of the first vent; and
a second actuator assembly on the mask to automatically vary a second property of the second vent in response to a second control system signal for adjusting the central aperture of the second vent,
wherein a size of the central aperture of the first vent and a size of the central aperture of the second vent are configured to be controlled by a control system configured to control an operation of the first actuator assembly and the second actuator assembly, and wherein the operation is configured to change the size of the central aperture of the first vent distinctly from the size of the central aperture of the second vent by coordinating (a) an increase in size of the central aperture of one of the first vent and the second vent, with (b) a decrease in size of the central aperture of the other one of the first vent and the second vent.

US Pat. No. 10,317,098

HEATING APPARATUS

ResMed Pty Ltd, Bella Vi...

1. A method of manufacturing a tub for a humidifier comprising:a) providing a tool for molding a container;
b) positioning a heating element inside said tool; and
c) molding a container made of a first material around said heating element, wherein the container comprises a base and a side wall defining a reservoir for a supply of liquid to be evaporated, wherein the heating element is arranged on an inner surface of the container; and
d) subsequent to molding the container, molding a second material different from the first material over at least the heating element on an inner surface of the container in order to provide a lining,
wherein the heating element is preheated to a predetermined temperature before the step of molding the first material, and
wherein the predetermined temperature is between 50° C. and 200° C.

US Pat. No. 10,307,555

ERGONOMIC AND ADJUSTABLE RESPIRATORY MASK ASSEMBLY WITH CUSHION

ResMed Pty Ltd, Bella Vi...

1. A patient interface comprising:a frame having an opening to receive pressurized gas, the opening having a longitudinal axis;
a cushion permanently co-molded to the frame, the frame and the cushion at least partly forming a breathing chamber;
an elbow assembly releasably snap-fittable with an audible click signaling that the elbow assembly has been securely positioned in alignment relative to the opening of the frame, the elbow assembly including a rotatable swivel elbow, wherein the elbow assembly includes a pair of diametrically opposed snap-fit connections, and a pair of diametrically opposed finger-operated release portions to allow release of the snap-fit connections;
headgear to support the patient interface on the patient's head; and
a plurality of gas washout holes to allow escape of CO2 from the breathing chamber.

US Pat. No. 10,500,424

PATIENT INTERFACE SYSTEMS

ResMed Pty Ltd, Bella Vi...

1. A textured surface coating of a portion of an elastomer strap included in a headgear system, wherein the textured surface coating is adapted to contact the skin of a patient when the headgear system is mounted on a patient's head, and the textured surface coating has a Ra value greater than zero.

US Pat. No. 10,478,585

TUB FOR HUMIDIFIER

ResMed Pty Ltd, Bella Vi...

1. A humidifier configured to humidify pressurized gas in a CPAP system, the humidifier comprising:a tub base configured to be in fluid communication with the pressurized gas, the tub base comprising a bottom side that forms part of a bottom wall of a tub;
a base plate removably attached to a bottom side of the tub base to cover an opening in the bottom side of the tub base and complete the bottom wall of the tub, the base plate forming part of an exterior surface of the tub;
a seal sandwiched between the base plate and the tub base; and
a retainer configured to bias the base plate against the tub base and compress the seal between the tub base and the base plate when the retainer engages the base plate, at least a portion of the retainer being positioned at a periphery of the base plate when the base plate is retained against the tub base.

US Pat. No. 10,441,738

MASK SYSTEM

ResMed Pty Ltd, Bella Vi...

1. A mask system for delivery of respiratory therapy to a patient, comprising:a mask shaped to seal entirely below a nasal bridge of the patient and provide pressurized air to a nose of the patient and a mouth of the patient, the mask including:
a mouth sealing portion that defines a mouth aperture through which the pressurized air is to be provided to the mouth of the patient;
a nares sealing portion that defines a nasal aperture through which the pressurized air is to be provided to the nose of the patient, the nasal aperture spaced apart from the mouth aperture, the nares sealing portion including:
(i) a first wall,
(ii) a flexible membrane shaped to seal around nares of the patient through contact with sides of the nose of the patient when the mask is worn by the patient, the flexible membrane extending away from the first wall towards a free edge of the flexible membrane, the flexible membrane including:
a flexible membrane nose tip engagement portion,
a flexible membrane upper lip engagement portion,
a first flexible membrane side portion that is between the flexible membrane nose tip engagement portion and the flexible membrane upper lip engagement portion, and
a second flexible membrane side portion that is between the flexible membrane nose tip engagement portion and the flexible membrane upper lip engagement portion, the first flexible membrane side portion being on an opposite side of the nasal aperture from the second flexible membrane side portion,
(iii) a first supporting thickened portion that is located behind the first flexible membrane side portion to provide support to the first flexible membrane side portion that is between the flexible membrane nose tip engagement portion and the flexible membrane upper lip engagement portion, the first supporting thickened portion extending away from the first wall towards a first free edge of the first supporting thickened portion, the first free edge of the first supporting thickened portion being separated from a free edge of the first flexible membrane side portion, wherein a thickness of the first supporting thickened portion is multiple times thicker than a thickness of the first flexible membrane side portion, and
(iv) a second supporting thickened portion that is located behind the second flexible membrane side portion to provide support to the second flexible membrane side portion that is between the flexible membrane nose tip engagement portion and the flexible membrane upper lip engagement portion, the second supporting thickened portion extending away from the first wall towards a first free edge of the second supporting thickened portion, the first free edge of the second supporting thickened portion being separated from a free edge of the second flexible membrane side portion, wherein a thickness of the second supporting thickened portion is multiple times thicker than a thickness of the second flexible membrane side portion; and
headgear connectors on opposing sides of the mask to connect with headgear that retains the mask in position on a head of the patient when the mask system is worn by the patient.

US Pat. No. 10,426,910

CUSHION FOR MASK SYSTEM

ResMed Pty Ltd, Bella Vi...

1. A patient interface for providing a supply of pressurized air to a patient to treat Sleep Disordered Breathing (SDB) with Continuous Positive Airway Pressure (CPAP), the patient interface comprising:a rigid frame;
a soft cushion attached to the rigid frame, the soft cushion further comprising:
a nasal portion configured to seal at the patient's nose, the nasal portion further comprising at least one opening configured to direct the supply of pressurized air to the patient's nasal passages; and
a mouth portion configured to seal around the patient's mouth, the perimeter of the mouth portion further comprising a side wall, the mouth portion further comprising a membrane extending from the side wall and configured to seal with the patient's face, and the membrane forming an aperture configured to receive the patient's mouth and direct the supply of pressurized air to the patient's mouth;
an elbow assembly configured to connect the patient interface to an air delivery conduit; and
a headgear assembly configured to hold the rigid frame and the soft cushion in position on the patient's face,
wherein a flexible section of the perimeter of the mouth portion is relatively more flexible than the remainder of the mouth portion, and
wherein the side wall at the flexible section has a reduced thickness relative to the side wall around the remainder of the perimeter of the mouth portion.

US Pat. No. 10,398,862

METHOD AND APPARATUS FOR NON-INVASIVE MONITORING OF RESPIRATORY PARAMETERS IN SLEEP DISORDERED BREATHING

ResMed Pty Ltd, Bella Vi...

1. An air delivery system, comprising:a controllable flow generator configured to generate a supply of pressurized breathable gas to be provided to a patient for treatment;
a processor configured to control the controllable flow generator;
a pulse oximeter configured to determine a measure of patient effort during a treatment period and provide a patient effort signal to the processor;
an airflow measurement patient interface configured to measure cardiogenic respiratory flow of the patient and provide a cardiogenic respiratory flow signal to the processor; and
wherein the processor is configured to calculate a pulse transit time based at least in part on the cardiogenic respiratory flow signal and the patient effort signal and control the controllable flow generator based at least in part on the pulse transit time.

US Pat. No. 10,398,863

CARDIAC MONITORING AND THERAPY USING A DEVICE FOR PROVIDING PRESSURE TREATMENT OF SLEEP DISORDERED BREATHING

ResMed Pty Ltd, (AU)

1. A method for determining a cardiac condition with a pressure apparatus for treating breathing and controlling delivery of a pressurized gas by the pressure apparatus, comprising steps of:sensing, with a sensor, cardiogenic pressure oscillations or cardiogenic flow oscillations of a patient;
determining, with a processor, the patient's cardiac condition with the sensed cardiogenic oscillations; and
determining, with the processor and based on one or more sensed cardiogenic oscillations, an adjustment for a pressure delivery device of the pressure apparatus to control delivery of a pressurized gas by the pressure apparatus that would adjust to optimize a stroke volume of the patient.

US Pat. No. 10,363,382

WIRE HEATED TUBE WITH TEMPERATURE CONTROL SYSTEM FOR HUMIDIFIER FOR RESPIRATORY APPARATUS

ResMed Pty Ltd, Bella Vi...

1. A sensing circuit for a heated conduit for use in a respiratory apparatus, the sensing circuit comprising:a sensing wire coupled to a heating circuit for the heated conduit;
a temperature sensor coupled to the sensing wire and configured to measure the temperature of the heated conduit;
a sensing resistor coupled to the sensing wire and configured to provide an output to indicate the temperature measured by the temperature sensor; and
a bias generator circuit configured to provide a reference voltage to the sensing resistor to allow determination of the output as a function of a voltage drop across the sensing resistor during both heating on and heating off cycles of the heating circuit,
wherein the reference voltage is adjustable so that the reference voltage remains greater than a measured voltage across the sensing wire by a fixed value.

US Pat. No. 10,314,997

MASK SYSTEM

ResMed Pty Ltd, Bella Vi...

1. A mask system for providing respiratory therapy to the airways of a patient, the mask system comprising:a frame including a pair of upper headgear connectors;
a pair of lower headgear connectors, each of said pair of lower headgear connectors configured to connect to the frame;
a sealing arrangement structured to interface with the frame, the sealing arrangement adapted to form a seal with a patient's nose and/or mouth,
wherein the sealing arrangement forms a breathing chamber pressurizable to a therapeutic pressure, the sealing arrangement including a circular inlet opening structured to receive a flow of air at the therapeutic pressure for breathing by the patient;
an elbow adapted to be connected to an air delivery tube to deliver the flow of air at the therapeutic pressure to the breathing chamber; and
headgear to maintain the mask system in position on a patient's head,
the headgear including a rear strap, a pair of upper side straps adapted to be routed over the patient's ears, and a pair of lower side straps adapted to be routed under the patient's ears, wherein each of the pair of upper side straps is adapted to connect to a respective one of the pair of upper headgear connectors of the frame and each of the pair of lower side straps is adapted to connect to a respective one of the pair of lower headgear connectors,
wherein the sealing arrangement comprises a face-contacting side and a non face-contacting side,
wherein the non face-contacting side of the sealing arrangement comprises a front wall having the circular inlet opening adapted to communicate with the elbow,
wherein the front wall includes an inside surface arranged to be at said therapeutic pressure in use and an outside surface arranged to be at ambient pressure in use, and the frame includes a wall arranged along the outside surface of the front wall so that the wall is outside the breathing chamber,
wherein the face-contacting side of the sealing arrangement includes a sealing flap,
wherein the sealing arrangement comprises a co-molded construction in which the face-contacting side and the non face-contacting side comprise separately formed and attached components,
wherein the sealing flap in a nasal bridge region of the sealing arrangement includes a dip-shape or valley when viewed from a top of the sealing arrangement, the dip-shape or valley being adapted to be complementary to a shape of a nasal bridge of the patient,
wherein the sealing arrangement includes a side-of-nose region, wherein the sealing flap is thinner in the nasal bridge region than in the side-of-nose region, and
wherein the sealing arrangement includes a corner region, wherein the sealing arrangement includes an intermediate region that is intermediate of the side-of-nose region and the corner region, wherein said intermediate region of the sealing arrangement is less thick or less stiff than the side-of-nose region and the corner region.

US Pat. No. 10,500,362

DELIVERY OF RESPIRATORY THERAPY USING COLLAPSIBLE INLET CONDUITS

ResMed Pty Ltd, Bella Vi...

1. A mask system to deliver respiratory therapy to a patient, the mask system comprising:a patient interface that defines a breathing chamber and is shaped to seal against a face of the patient and deliver pressurized air from the breathing chamber into airways of the patient when the mask system is worn by the patient, the patient interface defining a first inlet port for introduction of pressurized air into the breathing chamber at a first location and a second inlet port for introduction of pressurized air into the breathing chamber at a second location that is spaced apart from the first location;
a first collapsible inlet conduit to extend across a first side of a head of the patient between a first ear of the patient and a first eye of the patient when the mask system is worn by the patient, and to connect with the first inlet port to deliver pressurized air to the breathing chamber, the first collapsible inlet conduit structured to move between a first conduit open condition in which the first collapsible inlet conduit allows passage of pressurized air and a first conduit collapsed condition in which the first collapsible inlet conduit substantially prevents passage of pressurized air upon the head of the patient resting on the first collapsible inlet conduit against bedding, the first collapsible inlet conduit being biased toward the first conduit open condition without being pressurized; and
a second collapsible inlet conduit to extend across a second side of the head of the patient between a second ear of the patient and a second eye of the patient when the mask system is worn by the patient, and to connect with the second inlet port to deliver pressurized air to the breathing chamber, the second collapsible inlet conduit structured to move between a second conduit open condition in which the second collapsible inlet conduit allows passage of pressurized air and a second conduit collapsed condition in which the second collapsible inlet conduit substantially prevents passage of pressurized air upon the head of the patient resting on the second collapsible inlet conduit against bedding, the second collapsible inlet conduit being biased toward the second conduit open condition without being pressurized.

US Pat. No. 10,485,943

MASK SYSTEM

ResMed Pty Ltd, Bella Vi...

20. A mask system configured to deliver air pressurized by a flow generator system by at least 4 cm H2O above atmospheric pressure to the airways of a patient to treat sleep disordered breathing (SDB) by continuous positive airway pressure (CPAP), the mask system comprising:a mask comprising:
a cushion configured to form a seal with the patient's nose in use; and
a first vent arrangement configured to discharge gas from the mask to atmosphere during therapy;
two inlet conduits, each of the two inlet conduits configured to extend from a position superior to the patient's head and along a corresponding side of the patient's head in use, and each of the two inlet conduits being in fluid communication with a corresponding side of the mask to deliver pressurized air to the mask; and
a second vent arrangement configured to discharge gas to atmosphere during therapy, the second vent arrangement configured to be positioned superior to the patient's head in use so as to direct discharged gas away from the patient and a bed partner during therapy.

US Pat. No. 10,478,581

HEADGEAR FOR A RESPIRATORY MASK AND A METHOD FOR DONNING A RESPIRATORY MASK

ResMed Pty Ltd, Bella Vi...

1. A respiratory mask for delivering breathable gas to a patient for treatment of sleep disordered breathing, the respiratory mask comprising:an airway interfacing portion constructed and arranged to engage a patient's face for delivery of the breathable gas to a patient's nose and/or mouth;
a positioning and stabilising structure constructed and arranged to provide a force to hold the airway interfacing portion in an interfacing location on the patient's face,
the positioning and stabilising structure comprising a pair of rigidizers, each of the pair of rigidizers having a front end portion adjacent the airway interfacing portion,
the front end portion including a first end structured to connect to the airway interfacing portion and a second end, the first end extending anteriorly of the second end such that the first end is spaced and separated from the second end; and
a cover provided to each of the pair of rigidizers and structured to at least partially encapsulate a respective one of the pair of rigidizers,
the cover including a slot arranged to allow the first end of the front end portion of the respective one of the pair of rigidizers to extend therethrough towards the airway interfacing portion, and the cover further including a pocket to receive the second end of the front end portion of the respective one of the pair of rigidizers,
wherein the cover includes a face contacting side arranged on one side of the respective one of the pair of rigidizers and a non-face contacting side arranged on an opposite side of the respective one of the pair of rigidizers,
the face contacting side having a face contacting surface adapted to contact the patient's face and the non-face contacting side having an outwardly facing surface adapted to face away from the patient's face,
wherein each of the face contacting side and the non-face contacting side comprises lateral edges, and
wherein each of the lateral edges of the face contacting side is directly and fixedly attached to a respective one of the lateral edges of the non-face contacting side to provide a direct and fixed connection that fixes the face contacting and non-face contacting sides in an operative position and thereby securely encloses the respective one of the pair of rigidizers between the face contacting and non-face contacting sides.

US Pat. No. 10,463,820

ACCLIMIZATION THERAPY FOR FIRST TIME USERS

ResMed Pty Ltd, Bella Vi...

11. A system for acclimatizing a patient to therapy for treatment of sleep-disordered breathing, comprising:a continuous positive air pressure (CPAP) device configured to provide a supply of pressurized breathable air to the patient;
a computer-mediated compliance monitoring package, implemented using at least one processor, that is configured to:
based on feedback that is accepted via a user input device that a user interacts with, control a pressure level at which the supply of breathable air is delivered to at least one airway of the patient, wherein the pressure level is above atmospheric pressure;
compile patient compliance data based at least in part on the feedback that is provided to the user input device in connection with how the pressure level is controlled;
process the patient compliance data to identify at least one problem that is associated with delivery of the supply of breathable air;
generate at least one potential solution by comparing any identified problems to a solutions database; and
presenting, via a user interface that is viewable to the patient, the at least one potential solution to address the identified at least one problem based on the comparing.

US Pat. No. 10,434,271

MULTIPLE STAGE BLOWERS AND VOLUTES THEREFOR

ResMed Pty Ltd, Bella Vi...

1. A blower assembly configured to deliver a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to a patient interface in communication with an entrance to a patient's airways including at least an entrance of the patient's nares, while the patient is sleeping, to ameliorate sleep disordered breathing, the blower assembly comprising:a motor having a shaft that extends from opposite sides of the motor;
an impeller attached to the shaft on a first side of the motor and structured to rotate in close proximity to a volute wall; and
a circuit board configured to control power supplied to the motor, wherein the circuit board is configured so that the power supplied to the motor is terminated when the impeller is closer than a predetermined distance from the volute wall.

US Pat. No. 10,434,273

CUSHION TO FRAME ASSEMBLY MECHANISM

ResMed Pty Ltd, Bella Vi...

1. 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 face contacting portion and a resiliently flexible lip;
a frame member; and
a cushion clip member provided to maintain engagement between the cushion member and the frame member,
wherein the cushion member and the frame member are repeatedly engageable with and disengageable from one another,
wherein a gas chamber bounded by an outer perimeter is formed at least in part by engagement of the cushion member and the frame member,
wherein the cushion clip is proximate the outer perimeter, and
wherein the resiliently flexible lip is configured to seal between the cushion member and the frame member, and the resiliently flexible lip projects laterally in a direction away from a wall that forms part of a groove in a tongue and groove arrangement and projects towards an interior of the gas chamber, the resiliently flexible lip extending transverse to a direction that the tongue extends into the groove.

US Pat. No. 10,420,907

PATIENT INTERFACE SYSTEMS

ResMed Pty Ltd, Bella Vi...

1. A patient interface system for delivery of a supply of air at positive pressure to an entrance of a patient's airways for treatment of sleep disordered breathing, the patient interface system comprising:a patient interface structure comprising a flexible one-piece silicone structure at least partially forming a plenum having a seal provided thereto, the seal being adapted to, in use, engage and form a seal with the underside of the patient's nose; and
a flexible seal positioning and stabilizing structure to position and stabilize the patient interface structure in sealing engagement with the patient's airways, the seal positioning and stabilizing structure including:
a pair of main portions comprising a silicone material, each main portion being formed as one-piece and configured to, in use, engage a corresponding side of the patient's face between the patient's eye and ear, each main portion having a patient interface structure connector provided at a bottom portion thereof, each patient interface structure connector being removably connected to a corresponding side of the patient interface structure; and
an adjustable rear strap connected at respective end portions thereof to the main portions of the seal positioning and stabilizing structure and being configured to, in use, extend around the back of the patient's head at a position above the patient's ears.

US Pat. No. 10,420,909

APPARATUS FOR CONTROLLING PRESSURIZED GAS DELIVERED TO A PATIENT

ResMed Pty Ltd, Bella Vi...

1. A patient interface system for delivering pressurized gas to a patient, the patient interface system comprising:a patient interface including a plenum chamber, a seal-forming structure connected to the plenum chamber and configured to form a seal with the patient's face in use, the plenum chamber having an inspiratory port and an expiratory port located on generally opposite sides of the plenum chamber such that, in use, the inspiratory port and the expiratory port are positioned on generally opposite sides the patient's nose, and the plenum chamber configured to receive the patient's nose in use and to deliver the pressurized gas to the patient's airways, wherein said inspiratory port and said expiratory port are at least one of sized, oriented, positioned, and spaced apart to allow a cross-flow of pressurized gas to flow, in use, unidirectionally from the inspiratory port into the plenum chamber, to an entrance to the patient's airways, and out of the plenum chamber through the expiratory port to minimize dead space within the patient interface; and
an outlet limb connected to the expiratory port, said outlet limb having an aperture in pneumatic communication with the plenum chamber, said aperture having an aperture size that is variable between a first configuration that is open and at least one second configuration that is different from the first configuration.

US Pat. No. 10,413,692

CUSHION ASSEMBLY

ResMed Pty Ltd, (AU)

1. A foam cushion assembly for a patient interface, the foam cushion assembly being adapted to couple with a patient interface frame, the cushion assembly comprising a nose seal portion and a mouth seal portion, wherein the cushion assembly comprises:a foam cushion arranged to form a portion of a plenum chamber for sealing about the nose and mouth, the foam cushion having a facial contact surface; and
a cushion support clip comprising a mounting portion with a ratio of width to thickness of the mounting portion, the ratio being greater than three, the cushion support clip having an inwardly concave cross section and being flexible in its concave portion to provide, in use, one or more of (a) deflection of the foam cushion relative to the frame; (b) an air spring to the foam cushion, the air spring responsive to pressurized gas in the cushion assembly; and (c) a cantilever spring for the foam cushion.

US Pat. No. 10,400,773

DOUBLE-ENDED BLOWER AND VOLUTES THEREFOR

ResMed Pty Ltd, Bella Vi...

1. A blower configured to deliver air to a patient's airways comprising: a motor, a first impeller, a second impeller, and a damping sleeve comprising: a first half and a second half that define in part a flow path adapted to provide fluid communication between the first impeller and the second impeller, wherein the damping sleeve is adapted to dampen vibration caused by the motor, the first impeller and/or the second impeller.

US Pat. No. 10,383,569

MECHANICAL VENTILATION IN THE PRESENCE OF SLEEP DISORDERED BREATHING

ResMed Pty Ltd, (AU)

1. A method for treating sleep disordered breathing with a ventilatory device that delivers a supply of air to a patient at a positive pressure; said device including a controller, a blower, a patient interface, and a flow sensor; comprising the steps of:sensing leaks from the patient interface, the supply of air to the patient through the patient interface, and transitions between inspiration and expiration of the patient's breathing cycle with said flow sensor;
detecting the pressure in the patient interface with said controller, determining with said controller the presence of a first event and a second event based upon detected information, the first and second events being different indications of sleep disordered breathing, the first event being an indication of obstructive sleep disordered breathing; and
setting with said controller a first pressure as a function of the occurrence of the first event and adjusted for any sensed leak indicative of mouth leak, and setting a second pressure as a function of the occurrence of the second event and the first pressure, the first pressure being provided during the expiratory phase of the patient's breathing cycle and the second pressure being provided during the inspiratory phase of the patient's breathing cycle.

US Pat. No. 10,376,669

VENTLESS MASK CPAP SYSTEM

ResMed Pty Ltd, Bella Vi...

1. A CPAP system comprising:a mask provided to a patient in use, the mask including a breathing chamber;
a flow generator in communication with the mask;
a positive pressure line to provide positive pressure air from the flow generator to the mask; and
a vacuum or return line provided to actively extract and/or remove gas exhausted by the patient,
wherein the vacuum or return line is configured and positioned to direct the gas exhausted by the patient to the flow generator without recirculation to the patient, and
the vacuum or return line is in communication with a vent outlet provided on the flow generator.

US Pat. No. 10,369,318

UNOBTRUSIVE NASAL MASK

ResMed Pty Ltd, Bella Vi...

1. A patient interface for delivering breathable gas to a patient, the patient interface comprising:a mask having a sealing portion adapted to form a seal with the patient, the mask having headgear connectors;
headgear adapted to secure the mask to a head of the patient, the headgear having a first strap portion and a second strap portion, the first strap portion adapted to connect to the mask, the second strap portion adapted to connect to and be separable from the first strap portion;
a first alignment indicator disposed on the mask;
a second alignment indicator disposed on the first strap portion; and
a third alignment indicator disposed on the second strap portion,
wherein the first and second alignment indicators are positioned to align with each other when the first strap portion is connected to the mask with a correct alignment, and the second and third alignment indicators are positioned to align with each other when the first strap portion is connected to the second strap portion with a correct alignment.

US Pat. No. 10,363,385

RESPIRATORY APPARATUS

ResMed Pty Ltd, Bella Vi...

1. A head-mountable flow generator configured to deliver a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to a patient interface in communication with an entrance to a patient's airways including at least an entrance of the patient's nares, while the patient is sleeping, to ameliorate sleep disordered breathing, the flow generator comprising:a motor;
an impeller assembly configured to be driven by the motor; and
a housing that encases the motor and the impeller assembly and is configured to be mounted on the patient's head, the housing comprising an inlet configured to receive the flow of breathable gas and a pair of opposing outlets configured to direct the pressurized flow of breathable gas to the patient interface,
wherein the impeller assembly is configured to pressurize the flow of breathable gas received from the inlet and the housing is configured to convey the pressurized flow of breathable gas through both outlets.

US Pat. No. 10,537,279

METHODS FOR PROVIDING EXPIRATORY PRESSURE RELIEF IN POSITIVE AIRWAY PRESSURE THERAPY

ResMed Pty Ltd, (AU)

1. A method of operating a CPAP device to detect an expiratory pause, using a microcontroller, in a breath comprising the steps of:continuously calculating a respiratory flow signal indicative of a respiratory flow of air to a patient;
determining whether the respiratory flow signal is an expiratory flow signal; and
determining that an expiratory pause has commenced when the expiratory flow signal exceeds a small negative threshold.

US Pat. No. 10,537,696

PATIENT INTERFACE SYSTEMS

ResMed Pty Ltd, Bella Vi...

1. A mask system to treat sleep disordered breathing by providing pressurized air to a patient using components dimensioned to be unobtrusive, the mask system comprising:a patient interface adapted to receive pressurized air from an air delivery conduit and contemporaneously provide the pressurized air to a nose of the patient and a mouth of the patient, the patient interface including:
a cushion to contact a face of the patient when the mask system is worn by the patient, the cushion including:
a mouth cushion portion shaped to seal (i) below the mouth of the patient between a lower lip of the patient and a chin of the patient, and (ii) above the mouth of the patient between an upper lip of the patient and nares of the patient, when the mask system is worn by the patient, the mouth cushion portion defining a mouth aperture shaped to receive the mouth of the patient, and
a nose cushion portion shaped to seal around the nares of the patient without contacting a bridge of the nose of the patient when the mask system is worn by the patient, the nose cushion portion defining a nose aperture shaped to provide the pressurized air to both nares of the patient, a height of the nose aperture measured between the upper lip of the patient and a tip of the nose of the patient being about 5-15 mm; and
a frame that connects to the cushion at a non-face-contacting portion of the cushion, the frame having greater rigidity than the cushion.

US Pat. No. 10,518,058

MASK ASSEMBLY

ResMed Pty Ltd, Bella Vi...

1. A nasal mask assembly for providing respiratory therapy to a patient, the nasal mask assembly comprising:a nasal interface configured to deliver a flow of pressurized breathable gas to the patient, the nasal interface comprising:
a pair of nasal inserts to be inserted into the nares of the patient;
an inlet through which the pressurized breathable gas is received;
a nasal interface body with one or more surfaces defining one or more fluid passageways from the inlet to the pair of nasal inserts, wherein the nasal interface body includes (i) a flexible member and (ii) a frame, wherein the flexible member includes:
a first surface configured to contact an upper lip portion of a patient's face, the first surface extending laterally along a width dimension,
a second surface extending from the first surface and configured to face an underside of the patient's nostrils, the nasal inserts extending from the second surface, and
a third surface connected to and extending between the first surface and the second surface, the third surface forming a loop with the first surface and the second surface about an axis extending along the width dimension;
wherein the frame includes:
a main body configured to be inserted into and retained within the loop of the flexible member, wherein the main body includes an outlet that is configured to form a seal with an interior of the flexible member to thereby provide the one or more fluid passageways when the main body is inserted into and retained by the loop of the flexible member;
a left lateral headgear connector extending from a left lateral side of the nasal interface; and
a right lateral headgear connector extending from a right lateral side of the nasal interface;
a conduit to provide the flow of pressurized breathable gas to the nasal interface, the conduit including a first end and a second end, the first end being connected to a supply of pressurized breathable gas and the second end being connected to the inlet of the nasal interface;
a headgear assembly to position the nasal interface below the patient's nares, the headgear assembly comprising a plurality of headgear straps that include at least:
a left headgear strap that is configured to connect to the left lateral headgear connector; and
a right headgear strap that is configured to connect to the right lateral headgear connector; and
a conduit clip configured to be attached to a selected headgear strap from the plurality of headgear straps, the conduit clip including one or more curved retaining surfaces that extend outward from the selected strap, the one or more curved retaining surfaces being contoured to wrap at least partially around and retain the conduit adjacent to the selected headgear strap, wherein the conduit is connected to the conduit clip and maintained adjacent to the selected headgear strap at a location between the first end and the second end of the conduit.

US Pat. No. 10,518,061

HUMIDIFIER FOR A RESPIRATORY THERAPY DEVICE

ResMed Pty Ltd, Bella Vi...

1. A humidifier for increasing absolute humidity of a flow of air to be delivered to a patient's airways by a respiratory therapy device, the humidifier comprising:a humidifier housing forming a humidification chamber, the humidifier housing comprising:
an air inlet configured to receive the flow of air from a pressure device;
an air outlet configured to deliver the flow of air to a patient interface from the humidifier with added humidity; and
a flow path for the flow of air from the air inlet, through the humidification chamber, and to the air outlet;
a reservoir configured to retain a first volume of water;
a humidifier wick positioned within the humidification chamber and configured to retain a second volume of water, and the humidifier wick having a profiled shape to substantially enclose, in a radial direction, at least a portion of the flow path;
a delivery mechanism configured to deliver a flow of water from the reservoir to the humidifier wick;
a heating element positioned in thermal communication with the humidifier wick to heat the humidifier wick to vaporise the second volume of water to add absolute humidity to the flow of air;
an air flow baffle configured to lengthen at least a portion of the flow path through the humidification chamber; and
a wick frame positioned within the portion of the flow path enclosed by the humidifier wick and in contact with the humidifier wick to maintain thermal communication between the humidifier wick and the heating element to promote heat transfer from the heating element to the humidifier wick;
wherein the humidifier wick is removable from the humidification chamber, and
wherein the humidifier wick is anisotropically constructed such that the humidifier wick has a rate of wicking that is greater in a first direction than in a second direction.

US Pat. No. 10,512,429

DISCRIMINATION OF CHEYNE-STOKES BREATHING PATTERNS BY USE OF OXIMETRY SIGNALS

ResMed Pty Ltd, (AU)

1. A computer implemented method of detecting an occurrence of Cheyne-Stokes respiration in one or more programmed processors comprising:accessing blood gas data representing a measured blood gas signal from an oximeter;
determining a duration of one or more contiguous periods of changing saturation of a blood gas from the blood gas data;
determining a presence of a peak in a predetermined frequency range for de-saturation and re-saturation cycles of the blood gas data;
detecting the occurrence of Cheyne-Stokes respiration from (a) a comparison of the determined duration and a threshold derived to differentiate saturation changes due to Cheyne-Stokes respiration and saturation changes due to obstructive sleep apnea, and (b) a comparison of the determined peak to a further threshold;
generating an output indicating the detected occurrence of Cheyne-Stokes respiration; and
determining a quality indicator for determining a confidence level associated with detecting the occurrence of Cheyne-Stokes respiration,
wherein the processor determines the quality indicator by determining a number of samples where the measured blood gas signal drops below a predetermined percentage threshold.

US Pat. No. 10,512,743

METHODS AND APPARATUS FOR VARYING BACK-UP BREATHABLE GAS TIMING

ResMed Pty Ltd, (AU)

1. An apparatus for adjusting back-up delivery of breathable gas to a patient for the patient's respiration comprising:a breathable gas source configured to deliver the breathable gas to a patient, the delivery of the breathable gas being directed to the patient through a respiratory conduit of the apparatus,
a sensor for detecting patient breathing, and
a controller, including at least one processor, the controller coupled with the sensor and the breathable gas source, the controller configured to:
detect patient inspiration with the sensor;
trigger a delivery of the breathable gas if patient inspiration is detected;
in a back-up mode, control automatic delivery, as a back-up, of the breathable gas if patient inspiration is not detected, wherein the automatic delivery of the breathable gas in the back-up mode is determined as a function of an initial timing and elapsed time;
adjust the initial timing to a modified timing after the automatic delivery in the back-up mode, the modified timing being a decrease of the initial timing; and
in the back-up mode, control automatic delivery, as a subsequent back-up, of the breathable gas if patient inspiration is not detected, wherein the automatic delivery of the subsequent breathable gas in the back-up mode is determined as a function of the modified timing and elapsed time.

US Pat. No. 10,512,744

MASK SYSTEM COMPRISING A COMBINED AIR DELIVERY AND STABILIZING STRUCTURE

ResMed Pty Ltd, Bella Vi...

1. A mask system to deliver respiratory therapy to a patient, the mask system comprising:a patient interface that includes a nasal cushion portion shaped to seal around both nostrils of the patient and deliver pressurized air from a breathing chamber defined by the patient interface through a single air delivery orifice to both nostrils, the single air delivery orifice of the patient interface being sized to receive both nostrils without the patient interface having positively intruding features inside the nostrils, the patient interface defining a first passage for introduction of pressurized air into the breathing chamber at a first lateral side of the patient interface and a second passage for introduction of pressurized air into the breathing chamber at a second lateral side of the patient interface that opposes the first lateral side of the patient interface; and
a conduit headgear system that provides a combined air delivery and stabilizing structure for the patient interface, the conduit headgear system including:
a first inlet conduit to introduce pressurized air into the breathing chamber of the patient interface through the first passage, the first inlet conduit structured to engage against a first side of a head of the patient and pass between a first ear of the patient and a first eye of the patient when the mask system is worn by the patient, the first inlet conduit being biased open and being structured to transition to a collapsed phase in which conductance of pressurized air through the first inlet conduit is reduced to a negligible amount upon the head of the patient resting on the first inlet conduit against bedding;
a second inlet conduit to introduce pressurized air into the breathing chamber of the patient interface through the second passage, the second inlet conduit structured to engage against a second side of the head of the patient and pass between a second ear of the patient and a second eye of the patient when the mask system is worn by the patient, the second inlet conduit being biased open and being structured to transition to a collapsed phase in which conductance of pressurized air through the second inlet conduit is reduced to a negligible amount upon the head of the patient resting on the second inlet conduit against bedding;
a back strap to extend across an occiput of the patient when the mask system is worn by the patient, the back strap being attachable with the first inlet conduit above the first ear of the patient and being attachable with the second inlet conduit above the second ear of the patient; and
a manifold shaped to connect a supply of pressurized air to both the first inlet conduit and the second inlet conduit while the manifold engages against a top of the head of the patient.

US Pat. No. 10,500,363

MASK ASSEMBLY

ResMed Pty Ltd, Bella Vi...

1. A mask assembly for use in the delivery of Non-invasive Positive Airway Pressure (NPPV) to a patient for therapy of Sleep Disordered Breathing (SDB), the mask assembly comprising:a cushion having a seal forming portion that is structured to seal with only the patient's nose in use, the cushion forming at least in part an interior chamber;
a shell assembly including a generally rigid shell, the generally rigid shell having a port that opens into the interior chamber, the generally rigid shell including slot portions, each of the slot portions being a hole formed through the generally rigid shell, and an exhalation vent configured to vent exhaled gas to atmosphere;
a retaining ring having clip portions, the cushion being attached to the retaining ring, and the retaining ring being configured to be engaged to the generally rigid shell by inserting the clip portions through corresponding ones of the slot portions; and
an air inlet tube attached to the port of the generally rigid shell such that the air inlet tube and the generally rigid shell are in fluid communication to supply breathable gas from a pressurized supply to the interior chamber;
wherein the cushion further comprises a sealing lip that is configured to contact and seal against the generally rigid shell when the cushion and the generally rigid shell are connected by the retaining ring; and
wherein the mask assembly does not contact the patient's forehead in use.

US Pat. No. 10,456,540

PATIENT INTERFACE SYSTEMS FOR ENSURING EFFECTIVE SEAL

ResMed Pty Ltd, Bella Vi...

1. A patient interface system for delivering pressurized breathable gas to a patient, comprising:a patient interface including first and second portions adapted to seal against the patient's face;
a frame element configured to at least partially support the patient interface on the patient's face when the patient interface is worn; and
a seal maintenance resilient structure disposed between the patient interface and the frame element, the seal maintenance resilient structure being configured to urge the patient interface against the patient's face when the patient interface is worn, the seal maintenance resilient structure consisting of first and second compression springs,
wherein the first and second compression springs are disposed respectively between the first and second portions of the patient interface and the frame element to urge the first and second portions into sealing engagement with the patient's nose when the patient interface is worn, and
wherein a supply tube is connected directly to the frame element and is in fluid communication with the patient interface to provide breathable gas to the patient, the seal maintenance resilient structure being configured such that when a disruptive force is exerted on the supply tube and in turn transferred to the frame element as a pulling force thereon, the seal maintenance resilient structure resists movement of the patient interface caused by the disruptive force thereby decoupling the patient interface from the supply tube.

US Pat. No. 10,456,544

CUSHION FOR PATIENT INTERFACE

ResMed Pty Ltd, Bella Vi...

1. A cushion for a patient interface that delivers breathable gas to a patient, the cushion including a nasal bridge region, a pair of side of nose regions, a pair of upper cheek regions, a pair of lower cheek regions and a chin region, the cushion comprising:a non-face contacting portion including a base wall structured to be connected to a frame;
a face-contacting portion structured to engage the patient's face,
wherein the face-contacting portion comprises a membrane including a nasal bridge region, a pair of cheek regions, and a chin region adapted to form a continuous seal on a nasal bridge region, a pair of cheek regions, and a chin region of the patient's face, respectively,
wherein the membrane forms a widest point of the cushion, and a bottom portion of the base wall is entirely internally offset with respect to the widest point,
wherein the membrane has an inner edge defining an aperture adapted to receive the patient's nose, and
wherein, when the cushion is stationary on a horizontal surface and oriented such that the non-face contacting portion faces towards the horizontal surface,
1) the membrane in the nasal bridge region of the cushion has an exterior surface that includes two sides meeting at a centerline, each side sloping downwardly from the centerline,
2) in a cross-sectional view, the exterior surface of the membrane in the nasal bridge region of the cushion a) curves downwardly along the centerline from a peak of the membrane's curvature to the inner edge of the membrane, and b) curves downwardly along the centerline from the peak of the membrane's curvature in a direction away from the inner edge of the membrane, to thereby form a convex shape,
3) in a cross-sectional view, the membrane in the chin region of the cushion has an exterior surface forming a convex shape such that the exterior surface curves downwardly from a peak of the membrane's curvature to the inner edge of the membrane, and
4) the exterior surface of the membrane in the chin region of the cushion extends from one lower cheek region to the other lower cheek region and forms a concave shape adapted to engage the patient's chin region.

US Pat. No. 10,456,545

PATIENT INTERFACE SYSTEMS

ResMed Pty Ltd, Bella Vi...

1. A mask system for respiratory therapy involving delivery of pressurized air to a patient, the mask system comprising:a patient interface shaped to form a seal with both a mouth of the patient and nasal airways of the patient without contacting a nasal bridge of the patient, including:
a flexible cushion shaped to form a seal with (i) the nasal airways using a nasal seal portion of the cushion, and (ii) the mouth of the patient using a mouth seal portion of the cushion, the nasal seal portion of the cushion and the mouth seal portion of the cushion comprising a same flexible material, the nasal seal portion of the cushion shaped to form a seal with the nasal airways at a portion of a nose of the patient that surrounds nares of the patient under the nose of the patient, the flexible cushion defining a plate-receiving aperture that is located at a front portion of the cushion that is opposite from a face-contacting portion of the cushion,
a front plate that has a greater rigidity than the flexible cushion, the front plate being located within the plate-receiving aperture at the front portion of the flexible cushion, the front plate being molded to the flexible cushion at a perimeter of the front plate, the front plate and the cushion defining a breathing chamber, the front plate comprising a transparent window through which the mouth of the patient is visible when the patient interface is worn by the patient,
a first headgear connector that is on a first side of the patient interface and positionable proximate to a first ear of the patient when the patient interface is worn by the patient, the first side being located between a top of the patient interface proximate the nose of the patient when the mask system is worn by the patient and a bottom of the patient interface proximate a chin of the patient when the mask system is worn by the patient, and
a second headgear connector that is on a second side of the patient interface and positionable proximate to a second ear of the patient when the patient interface is worn by the patient, the second side opposing the first side; and
headgear shaped to secure the patient interface on a head of the patient in sealing engagement with the mouth and the nasal airways, the headgear adapted to connect to the first headgear connector and the second headgear connector.

US Pat. No. 10,448,893

METHOD AND APPARATUS FOR DETECTING RESPIRATORY EFFORT

ResMed Pty Ltd, (AU)

1. A method for detecting respiratory related effort comprising:using a sensor to generate a strain signal, the strain signal including one or both of a mouth strain signal and a jaw strain signal, the sensor being configured with a respiratory mask or headgear of a respiratory treatment apparatus to sense mask force or headgear tension, the headgear tension concerning change in tension of a strap of the headgear, wherein the sensor is configured to generate the strain signal in response to movement of one or both of a user's mouth and jaw;
receiving the strain signal and a flow signal from a flow sensor in a processor, and
detecting breathing related events in the processor with the flow signal and strain signal, the detecting comprising analyzing the strain signal in the processor to detect respiratory related effort,
wherein the analyzing comprises a comparison of the strain signal and a threshold value;
and automatically controlling a change to a respiratory treatment variable in a controller of the respiratory treatment apparatus, based on the analyzing of the strain signal and the flow signal.

US Pat. No. 10,449,312

METHODS AND APPARATUS FOR THE SYSTEMIC CONTROL OF VENTILATORY SUPPORT IN THE PRESENCE OF RESPIRATORY INSUFFICIENCY

ResMed Pty Ltd, (AU)

20. Apparatus for providing ventilatory assistance to a spontaneously breathing patient comprising:a processor for determining a flow rate of air delivered to the patient, computing a measure of a difference between a function of respiratory airflow and a target value, determining an adjustment to ventilation support in a direction that tends to reduce a difference between the measure of the function of respiratory airflow and a target value, and determining a rate at which the determined adjustment of ventilation support is made based on a magnitude of the difference between the measure of the function of respiratory airflow and the target value, and
a controller for controlling a blower to deliver breathable gas to the patient at a pressure that is a function of said difference measure, the controller using a blower in a servo-controlled loop with a gain that varies depending on a magnitude of said difference measure such that the rate is a product of the gain and a ventilation error, the ventilation error comprising the magnitude of the difference, and wherein said gain is also varied as a function of the ventilation error.

US Pat. No. 10,449,315

RESPIRATORY MASKS WITH GUSSETED CUSHIONS

ResMed Pty Ltd, Bella Vi...

1. A respiratory mask assembly for treatment of sleep disordered breathing, the respiratory mask assembly comprising:a frame;
a cushion which at least in part defines a cavity adapted to receive at least a patient's nose,
wherein the cushion includes:
a face contacting portion,
a non-face contacting portion, and
a gusset portion between the face contacting portion and the non-face contacting portion,
wherein, when seen in cross-section:
the gusset portion includes a hanging portion that hangs over an adjacent exterior surface of the cushion, and
the gusset portion includes a first end adjacent to the face contacting portion and a second end adjacent to the non-face contacting portion, and the first end is offset radially outwardly from the second end,
wherein the gusset portion includes only a single gusset,
wherein the single gusset includes a first gusset wall that joins the face contacting portion at the first end, a second gusset wall that joins the non-face contacting portion at the second end, and a tip section that interconnects the first gusset wall and the second gusset wall,
wherein the tip section is positioned radially outwardly with respect to the non-face contacting portion,
wherein the tip section is offset radially outwardly from the first end and the second end, and
wherein a radial offset between the tip section and first end is greater than a radial offset between the first end and the second end; and
an air delivery connection supported by the frame and adapted to connect an air delivery conduit to supply air to the cavity.

US Pat. No. 10,449,317

PATIENT INTERFACE SYSTEMS

ResMed Pty Ltd, Bella Vi...

1. A mask system for respiratory therapy that involves delivering pressurized air to airways of a patient, the mask system comprising:a patient interface adapted to contemporaneously deliver the pressurized air to a mouth of the patient and a nose of the patient while the patient interface is positioned entirely below a nasal bridge of the patient, the patient interface forming a breathing chamber and including:
a mouth cushion adapted to seal around the mouth of the patient and deliver the pressurized air from the breathing chamber formed by the patient interface to the mouth of the patient, when the mask system is worn by the patient;
a nasal cushion adapted to seal around the nares of the patient and deliver the pressurized air from the breathing chamber formed by the patient interface to the nose of the patient through a nose aperture in the nasal cushion, when the mask system is worn by the patient, the nasal cushion having a dual wall construction comprising (i) a sealing wall arranged to contact a face of the patient, and (ii) a supporting wall, wherein an entire perimeter of the nose aperture is defined by an inner edge of the sealing wall; and
a frame that connects to a non-face-contacting portion of the mouth cushion.

US Pat. No. 10,369,310

METHOD AND APPARATUS FOR TREATMENT OF RESPIRATORY DISORDERS

ResMed Pty Ltd, (AU)

1. Apparatus for treating a respiratory disorder comprising:a pressure device, and
a controller, including at least one processor, configured to control the pressure device to:
supply, upon initiation of treatment, a flow of pressurised air to the airway of a patient at a treatment pressure according to a pre-sleep profile of pressure versus time,
increase, upon detection of sleep onset of the patient, the treatment pressure to a predetermined therapeutic pressure according to a bridging profile of pressure versus time, and
supply the flow of pressurised air to the airway of the patient at a therapeutic pressure,
wherein the controller is configured to detect the sleep onset by detecting:
few or no respiratory disturbances occurring within a predetermined interval, the predetermined interval being a predetermined time or predetermined breath count, wherein, by monitoring respiratory flow derived from a flow transducer, the controller detects few or no respiratory disturbances to detect the sleep onset by testing lack of variation during the predetermined interval of expiratory peak flow location.

US Pat. No. 10,369,315

RESPIRATORY MASK WITH MOLDED FRAME AND CUSHION

ResMed Pty Ltd, Bella Vi...

1. A respiratory mask configured to provide a supply of breathable gas to a patient's airways at a pressure elevated in the range of 4-20 cm H2O above atmospheric pressure to treat obstructive sleep apnea, the respiratory mask comprising:a mask frame formed from a first material, the mask frame further comprising an air inlet portion, the air inlet portion configured to be connected to an air supply conduit to receive the supply of breathable gas; and
a mask cushion formed from a second material, the mask cushion being shaped to substantially conform to the facial regions of the patient,
wherein the first material is different from the second material,
wherein the second material is more flexible and more resilient than the first material such that the mask cushion is configured to seal against the facial regions of a variety of patients, and
wherein the mask frame and the mask cushion comprise a one piece construction having a permanent, overmolded connection between the first material and the second material.

US Pat. No. 10,369,319

HEADGEAR FOR MASKS

ResMed Pty Ltd, Bella Vi...

1. A respiratory mask assembly for treatment of sleep disordered breathing in a patient, comprising:a mask;
a headgear system including a plurality of straps cooperative with the mask and permitting adjustable fit of the mask, the plurality of straps comprising:
a rear portion having a closed rear loop to engage and circumscribe a back of the patient's head;
a first upper strap and a second upper strap each attached to the rear loop via stitching, the first upper strap attached at a first join, the second upper strap attached at a second join, a first rear loop edge of the rear loop abutting a first upper strap edge of the first upper strap at the first join, a second rear loop edge of the rear loop abutting an edge of the second upper strap at the second join;
wherein the first upper strap comprises a first upper patient-contacting fabric material layer and a first upper outwardly facing loop material layer, the second upper strap comprises a second upper patient-contacting fabric material layer and a second upper outwardly facing loop material layer;
a first lower strap and second lower strap each attached to the rear portion via stitching, the first lower strap attached at a first lower join, the second lower strap attached at a second lower join, a first rear portion edge of the rear portion abutting a first lower strap edge of the first lower strap at the first lower join, a second rear portion edge of the rear portion abutting a second lower strap edge of the second lower strap at the second lower join;
wherein the first lower strap comprises a first lower patient-contacting fabric material layer and a first lower outwardly facing loop material layer, the second lower strap comprises a second lower patient-contacting fabric material layer and a second lower outwardly facing loop material layer;
wherein the first lower strap and the second lower strap are each configured to extend below the patient's ears in use;
wherein a first upper hook portion is located proximate a free end of the first upper strap, a second upper hook portion is located proximate a free end of the second upper strap, a first lower hook portion is located proximate a free end of the first lower strap, and a second lower hook portion is located proximate a free end of the second lower strap;
wherein the first upper strap, the second upper strap, first lower strap, and the second lower strap are length-adjustable via a hook and loop connection;
wherein the mask is secured to the patient's head with only four points of attachment including the first upper strap, the second upper strap, the first lower strap and the second lower strap;
wherein at least a portion of the rear loop is constructed from a laminate having at least a first fabric layer and a second fabric layer, the first fabric layer being constructed and arranged to be located on a non-patient-contacting side in use and the second fabric layer being constructed and arranged as a patient-contacting layer, and further wherein the first fabric layer and the second fabric layer are joined at a first longitudinal edge joint and a second longitudinal edge joint;
wherein the first fabric layer and the second fabric layer directly contact one another along each said first longitudinal edge joint and second longitudinal edge joint;
wherein the first fabric layer is formed of a first fabric material that has different properties than a second fabric material of the second fabric layer;
wherein the laminate has a first rounded lateral edge and a second rounded lateral edge when viewed in cross section;
wherein the first longitudinal edge joint is positioned at approximately a center or middle of the first rounded lateral edge when viewed in cross section and the second longitudinal edge joint is positioned at approximately a center or middle of the second rounded lateral edge when viewed in cross section; and
wherein the first longitudinal edge joint and the second longitudinal edge joint are selected from the group consisting of: an ultrasonic weld joint, a heat sealed joint, and a computer numerical controlled knife joint.

US Pat. No. 10,350,379

TREATMENT OF RESPIRATORY CONDITIONS

ResMed Pty Ltd, (AU)

1. A high flow rate respiratory treatment apparatus comprising:a flow generator to produce a flow of breathable gas into a nasal cavity through an unsealed patient interface at a first flow rate, wherein the unsealed patient interface is configured to intentionally leak from said nasal cavity an uninspired portion of said flow of breathable gas during use, at gaps between nares of a patient and outlet ends of prongs of the patient interface;
a humidifier in a path of the flow to humidify the breathable gas at a first humidity level; and
a processor configured to control automatic adjustments to the first flow rate of the flow generator and to control automatic adjustments to a setting of the first humidity level, the apparatus further configured to automatically maintain the humidity of the flow of breathable gas at the setting in response to detected deviations therefrom,
wherein the processor is configured to detect one or more incidents from the group consisting of: partial obstruction, apnea, and snoring; and
wherein the processor is configured to adjust the first flow rate in response to the processor detecting one or more incidents from the group consisting of: partial obstruction, apnea, and snoring.