| 主权项 |
1. A mask system for providing respiratory therapy to the airways of a person, the mask system being constructed and arranged to be in surrounding sealing relationship with the nose and mouth of the person in use, the mask system including a cushion, said cushion adapted to form a seal on the face of the person in a nasal bridge region of the face, a side of nose region of the face, a mouth corner region of the face, and a lower lip or chin region of the face, and said cushion further including at least one lateral stabilising portion adapted to direct a force against the side of the nose in the region of the nasal bridge,
wherein the cushion comprises a facial flap and a backup band, wherein the backup band extends at least part of the way around the perimeter of the cushion, wherein the backup band includes at least one gap therein to leave at least one portion of the facial flap unsupported, and the at least one gap is provided in the nasal bridge region and the lower lip or chin region, wherein the cushion is movably adaptable between (i) a first configuration in which the cushion is disengaged from the person's face, and (ii) a second configuration in which the cushion is engaged with the person's face to form said seal in use, wherein a nasal bridge region of the facial flap includes a valley when viewed from the top of the cushion in the first configuration constructed and arranged to accommodate and be complementary to the shape of the nasal bridge region of the face, wherein a lower lip or chin region of the facial flap includes a valley when viewed from the bottom of the cushion in the first configuration constructed and arranged to accommodate and be complementary to the shape of the lower lip or chin region of the face, and wherein the valley in the nasal bridge region, when viewed from the top of the cushion in the first configuration, includes a concave, face-contacting surface relative to adjacent portions each including a convex, face-contacting surface. |
