Gas without vent for patient interface
AssigneeResMed Limited
InventorMuditha Pradeep DANTANARAYANA
Life of this patent
Estimating the term…
Abstract
A gas washout vent, and a patient interface with the gas washout vent, configured to allow patient-exhaled CO2 to flow to an exterior of the plenum chamber to minimise rebreathing of exhaled CO2 by the patient, the gas washout vent including at least one outlet orifice; a diffusing member at least partly covering the outlet orifice; and a blocking member having an air-impermeable material, the blocking member preventing gas exiting from the outlet orifice from flowing straight through the diffusing member.
Claims53
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 an entrance of a patient's nares, 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 the patient's respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing, the patient interface comprising:
- a sealing structure configured to seal around the entrance to the patient's airways;
- a positioning and stabilising structure to maintain the sealing structure in sealing contact with an area surrounding the entrance to the patient's airways while maintaining a therapeutic pressure at the entrance to the patient's airways;
- a plenum chamber configured to be pressurised at a pressure above ambient pressure in use;
- a gas washout vent configured to allow patient-exhaled CO2 to flow to an exterior of the plenum chamber to minimise rebreathing of exhaled CO2 by the patient, the gas washout vent including one or more outlet orifice;
- a diffusing member at least partly covering the outlet orifice;
- and
- a blocking member having an air-impermeable material, the blocking member preventing all gas exiting from each said outlet orifice from flowing through the diffusing member to exit the diffusing member directly opposite each said outlet orifice.
A gas washout vent for a patient interface 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, the gas washout vent comprising:
- one or more outlet orifice;
- a diffusing member covering the outlet orifice;
- and
- a blocking member having an air-impermeable material, the blocking member preventing all gas exiting from each said outlet orifice from flowing through the diffusing member to exit the diffusing member directly opposite each said outlet orifice.
A gas washout vent for a patient interface 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, the gas washout vent comprising:
- one or more outlet orifice each defining a first axis;
- a diffusing member covering the outlet orifice;
- and
- a blocking member having an air-impermeable material, the blocking member preventing all gas exiting from each said outlet orifice from flowing through the diffusing member to exit the diffusing member in a same direction as said outlet orifice and including at least one hole through the blocking member, the hole defining a second axis,
- wherein the first axis and the second axis are not aligned and not parallel.
Dependencies are inferred from the claim text.