Vent arrangement for respiratory mask
First Claim
1. An apparatus for automated control of gas washout of a non-invasive patient interface of a respiratory treatment apparatus comprising:
- a vent assembly having a variable exhaust area defined by one or more apertures of the vent assembly, the vent assembly being (1) associated with the non-invasive patient interface to vent expiratory gas and (2) proximal to the non-invasive patient interface;
an actuator to manipulate said one or more apertures of the vent assembly; and
a controller, including a processor, that is coupled to the actuator and configured to operate the actuator to change the variable exhaust area of the vent assembly,wherein the variable exhaust area is configured to be set to a plurality of open positions, the plurality of open positions providing different vent flow areas that are adapted to provide an increase or decrease in flow rate of the expiratory gas through the variable exhaust area.
6 Assignments
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Accused Products
Abstract
A control system (706) provides automated control of gas washout of a patient interface, such as a mask or nasal prongs. A gas washout vent assembly (60) of the system may include a variable exhaust area such as one defined by overlapping apertures of the assembly or a conduit having a variable gas passage channel. The vent assembly may be formed by nested structures, such as conic or cylindrical members, each having an opening of the overlapping apertures. The vent assembly may be attached substantially near or included with the patient interface. An actuator of the assembly, such as a solenoid or voice coil, manipulates an aperture of the vent assembly. The actuator may be configured for control by a controller to change the exhaust area of the vent assembly based on various methodologies including, for example, sleep detection, disordered breathing event detection, rebreathing volume calculation and/or leak detection.
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Citations
49 Claims
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1. An apparatus for automated control of gas washout of a non-invasive patient interface of a respiratory treatment apparatus comprising:
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a vent assembly having a variable exhaust area defined by one or more apertures of the vent assembly, the vent assembly being (1) associated with the non-invasive patient interface to vent expiratory gas and (2) proximal to the non-invasive patient interface; an actuator to manipulate said one or more apertures of the vent assembly; and a controller, including a processor, that is coupled to the actuator and configured to operate the actuator to change the variable exhaust area of the vent assembly, wherein the variable exhaust area is configured to be set to a plurality of open positions, the plurality of open positions providing different vent flow areas that are adapted to provide an increase or decrease in flow rate of the expiratory gas through the variable exhaust area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A system for automated control of gas washout of a non-invasive patient interface comprising:
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a vent assembly having a variable exhaust area defined by one or more apertures of the vent assembly, the vent assembly being (1) attachable to the non-invasive patient interface and (2) proximal to the non-invasive patient interface; and an actuator to manipulate an aperture of the vent assembly, the actuator configured for control by a controller to change the exhaust area of the vent assembly, wherein the variable exhaust area is configured to be set to a plurality of open positions, the plurality of open positions providing different vent flow areas that are adapted to provide an increase or decrease in flow rate of expiratory gas through the variable exhaust area. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification