Ergonomic and adjustable respiratory mask assembly with cushion

A patient interface for treating sleep disordered breathing of a patient, the patient interface comprising:

• a frame having a circular opening to receive pressurized gas, the circular opening having a longitudinal axis;
• a cushion connected to the frame, the frame and the cushion at least partly forming a breathing chamber;
• an elbow assembly having a pair of diametrically opposed snap-fit connections releasably snap-fittable to the frame with an audible click signaling that the elbow assembly has been securely aligned with the circular opening of the frame, the elbow assembly including a rotatable elbow, wherein the elbow assembly includes a pair of diametrically opposed finger-depressible release positions that are resiliently movable towards one another to move the snap-fit connections and thus release the elbow assembly;
• 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.

A patient interface for treating sleep disordered breathing of a patient, the patient interface comprising:

• a frame having a circular opening to receive pressurized gas;
• a cushion at least partly forming a breathing chamber to receive the pressurized gas;
• an elbow assembly having a frame engaging end at least partly insertable into the opening, the elbow assembly having a pair of diametrically spaced and opposed snap-fit connections releasably snap-fittable to the frame with an audible click signaling that the elbow assembly has been securely attached to the frame, the elbow assembly including a rotatable elbow;
• 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.