ResMed

The present invention discloses a control algorithm of a CPAP system or providing air at positive pressure for respiratory therapy to a patient, the CPAP system comprising: a respiratory pressure therapy - RPT - device configured to supply a flow of air at a therapeutic pressure; a patient interface forming a plenum chamber pressurizable to the therapeutic pressure, the patient interface including a seal-forming structure constructed and arranged to form a seal with a region of a patient's face surrounding an entrance to a patient's airways; and an air delivery tube configured to pass the fl ow of air at the therapeutic pressure from the RPT device to the patient interface, the control algorithm comprising: measuring ambient humidity; setting a target gas temperature based on the measured ambient humidity and a preferred gas temperature setting from the patient; measuring the gas temperature at the patient interface; and controlling power to the controllable heater to correct any differences between the target gas temperature and the measured gas temperature.

The present invention discloses an expiratory flow resistor to permit a stenting pressure above atmospheric pressure in a respiratory conduit comprising a respiratory conduit having an expiratory flow channel, and an aperture of the respiratory conduit to release a flow of the expiratory flow channel to atmosphere. Further, it comprises a cover component. The cover component is configured to selectively block the aperture, wherein the cover component is flexible and is loaded with a tension so that at least a first portion of the cover component blocks the aperture unless a pressure of the expiratory flow channel exceeds a pressure threshold that is above atmospheric pressure.

The present invention discloses a heat and moisture exchanger (HME) configured to engage the patient's nose while retrofitted into a plenum chamber of a patient interface, the HME comprising, a frame configured to engage the patient's septum in use; a cradle coupled to the frame and including at least one opening, the cradle configured to be positioned proximate to and outside of the patient's nares, in use; and an HME material positioned over and/or within the at least one opening, the HME material configured to be spaced apart from the patient's nares so as to form a gap between the HME material and the patient's nares; and wherein the HME is configured to engage and secure to the patient's nose independently of any other structure.

The present invention discloses a patient interface for sealed delivery of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance of a patient's nares and to an entrance of the patient's mouth, wherein the patient interface is configured to maintain a therapy pressure in a range of about 4 cmH2O to about 30 cmH2O above ambient air pressure in use, throughout a patient's respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing; said patient interface comprising: a plenum chamber at least partially forming a cavity pressurisable to a therapeutic pressure of at least 6 cmH2O above ambient air pressure, said plenum chamber including at least one plenum chamber inlet port sized and structured to receive a flow of air at the therapeutic pressure for breathing by a patient; and a seal-forming structure comprising a textile membrane constructed and arranged to form a seal with a region of the patient's face surrounding the entrance to the patient's nares and the entrance to the patient's mouth, the seal-forming structure comprising: a nasal portion configured to at least partially surround the entrance to the patient's nares, and an oral portion configured to at least partially surround the entrance to the patient's mouth, wherein said textile membrane has at least one hole such that the flow of air at said therapeutic pressure is delivered to at least an entrance to the patient's nares and/or the patient's mouth, the seal-forming structure constructed and arranged to maintain said therapeutic pressure in the cavity throughout the patient's respiratory cycle in use, wherein the textile membrane includes a three-dimensional shape having multiple curvatures, wherein the seal-forming structure further includes a flexible support structure for holding the textile membrane in the three-dimensional shape.

The present invention discloses a cushion assembly for a patient interface for sealed delivery of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance to the patient's airways including at least entrance of a patient's nares, wherein the patient interface is configured to maintain a therapy pressure in a range of about 4 cmH20 to about 30 cmH20 above ambient air pressure in use, throughout the patient's respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing, the cushion assembly comprising: a foam cushion; and an elastomeric support portion configured to support the foam cushion and comprising a pair of legs formed by a bend in the elastomeric support portion, one of the legs being a folded section to which the foam cushion is attached, wherein a width of the folded section varies in different locations of the cushion assembly to provide varying levels of support to the foam cushion in different regions of the cushion assembly, wherein the folded section is designed to allow the foam cushion to overhang the folded section to varying degrees.

A system includes a respiratory device, a mask, a sensor, and a control system. The respiratory device is configured to supply pressurized air. The mask is coupled to the respiratory device and configured to engage a user during a sleep session to aid in directing the supplied pressurized air to the user. The sensor is configured to generate physiological data associated with the user. The control system is configured to analyze the physiological data to determine a first sleep stage of the user, and based on the determined first sleep stage of the user, (i) set a range of pressures for the respiratory device to supply the pressurized air, and (ii) set a rate of change of the pressurized air for the respiratory device to use when changing the supplied pressurized air from a first pressure within the range of pressures to a second pressure within the range of pressures.

The present invention relates to a water reservoir for an apparatus for humidifying a flow of breathable gas, comprising a reservoir body, the reservoir body comprising a conductive portion provided at a lower portion of the reservoir body, wherein the conductive portion includes a peripheral interfacing portion structured and arranged to connect the conductive portion to one or more walls of the reservoir body, wherein the peripheral interfacing portion includes an intermediate portion extending from a sloped portion and an end portion that extends from the intermediate portion, wherein the end portion is bent so as to be at least inclined with respect to the intermediate portion, and wherein a radius of curvature of the bend of the end portion is substantially equal to or greater than a thickness of the conductive portion at the end portion.

The present invention relates to a patient interface comprising: a plenum chamber being formed entirely from a flexible material, the plenum chamber including: a cavity, an inlet port, and a groove formed on a surface of the plenum chamber outside the cavity and exposed to ambient pressure, the groove formed radially outside of the inlet port, and the groove forming an enclosed perimeter; a seal-forming structure; a positioning and stabilizing structure comprising: a frame coupled to the plenum chamber, the frame including, a central portion including an inner perimeter and an outer perimeter removably positionable within the groove, the inner perimeter configured to be spaced apart from the inlet port while positioned within the groove, a pair of upper arms, and a pair of lower arms; and headgear straps coupled to the pair of upper arms and the pair of lower arms of the frame.

The present invention discloses a respiratory pressure therapy device comprising: an enclosure including a first portion and a second portion, the second portion configured to engage the first portion in an assembled configuration, the first portion including a first interior surface, a first exterior surface and a first intermediate surface located between the first interior surface and the first exterior surface, the second portion including a second interior surface, a second exterior surface and a second intermediate surface located between the second interior surface and the second exterior surface, and a constrainment arrangement comprising respective interior and exterior surfaces of the first and second portions being configured to abut against each other so as to limit lateral movement of the first portion and the second portion.

The present invention relates to a plenum chamber insert for a patient interface for providing a flow of air at a therapeutic pressure to a patient for breathing. The plenum chamber insert comprises: a heat and moisture exchanger (HMX) material configured to receive and retain water from gas exhaled by the patient and to desorb retained water into the flow of air at the therapeutic pressure passing through the HMX material during use; and a frame, which comprises a plenum chamber insert port; an anterior insert frame and a posterior insert frame attached to the anterior insert frame, and the HMX material being secured between the anterior insert frame and the posterior insert frame; and an anterior insert frame spacer extending from the anterior insert frame and contacting the HMX material to space the HMX material away from the anterior insert frame such that a gap is formed between the anterior insert frame and the HMX material.