Patient interface

A patient interface for treatment of a user having a respiratory disorder, the patient interface comprising:

• a nasal portion adapted to be in communication with a source of pressurized gas for delivery to at least one nasal opening of the user;
• a mouth portion also adapted to be in communication with the source of the pressurized gas, said mouth portion having at least one aperture to deliver the pressurized gas to an oral cavity of the user's mouth;
• and
• an adaptor to couple the mouth portion to the nasal portion, the adaptor including a first conduit portion to convey said pressurized gas to a nasal chamber of the nasal portion, and a second conduit portion to convey pressurized gas to a mouth chamber of the mouth portion, the second conduit portion depending from the first conduit portion such that the nasal chamber is in direct communication with the mouth chamber,
• wherein the adaptor includes a user selectable restrictor portion adapted to be selective positioned by the user in a plurality of user selectable positions, the user selectable restrictor portion including only a single valve structured and arranged to control a flow of the pressurized gas provided to the nasal chamber and the mouth chamber so as to limit a flow of the pressurized gas out of the at least one aperture of the mouth portion to be up to but no greater than a flow of the pressurized gas to the nasal portion for each of the plurality of user selectable positions.

A retrofit kit for converting a nasal-only mask for treatment of a user having a respiratory disorder to a mouth and nasal mask, the nasal only mask having a nasal portion adapted to provide a flow of pressurized gas to nares of the user and having an aperture adapted to receive an elbow, the retrofit kit comprising:

• a mouth portion including a mouth chamber;
• an adaptor including a first conduit, the first conduit having a first end to connect with the aperture of the nasal portion and a second end adapted to receive the elbow, the adaptor further including a second conduit extending from the first conduit and in pressure communication with the first conduit and the mouth chamber of the mouth portion;
• and
• a user selectable restrictor portion adapted to be selectively positioned by the user in a plurality of user selectable positions, the user selectable restrictor portion including only a single valve structured and arranged to control a flow of the pressurized gas provided to the nasal portion and the mouth portion so as to limit a flow of the pressurized gas out of the mouth portion to be up to but no more than the flow of the pressurized gas provided out of the nasal portion to the nares of the user for each of the plurality of user selectable positions,
• the user selectable restrictor portion including at least one of (i) a first flow position in which the flow of the pressurized gas out of the mouth portion is the same as the flow of the pressurized out of the nasal portion, and (ii) a plurality of second flow positions in which the flow of the pressurized gas out of the mouth portion is less than the flow of the pressurized gas out of the nasal portion.

A retrofit kit for converting a nasal-only mask for treatment of a user having a respiratory disorder to a mouth and nasal mask, the nasal only mask having a nasal portion with a nasal chamber adapted to provide a flow of pressurized gas to nares of the user, and having an aperture adapted to receive an elbow, the retrofit kit comprising:

• a mouth portion;
• structure adapted to connect the nasal portion to the mouth portion;
• an air delivery tube to connect the nasal chamber of the nasal portion to the mouth portion;
• and
• a flow limitation structure including a user selectable restrictor portion adapted to be selectively positioned by the user in a plurality of user selectable positions, the user selectable restrictor portion including only a single valve to control a flow of the pressurized gas provided to the nasal portion and the mouth portion so as to limit a flow of the pressurized gas out of the mouth portion to be up to but no more than the flow of the pressurized gas provided out of the nasal portion to the nares of the user for each of the plurality of user selectable positions,
• wherein the user selectable restrictor portion includes at least one of (i) a first flow position in which the flow of the pressurized gas out of the mouth portion is the same as the flow of the pressurized gas out of the nasal portion, and (ii) a plurality of second flow positions in which the flow of the pressurized gas out of the mouth portion is less than the flow of the pressurized gas out of the nasal portion.