| 摘要 |
A patient interface device (10, 87, 120, 200) including a cushion assembly having a cushion-in-a-cushion arrangement and a system for supplying a flow of gas to a patient using such an interface device. The patient interface includes a mask shell (22, 122, 222) having a patient side and an outer side opposite the patient side adapted for receiving a supply of gas. A seal cushion (18, 136, 218) contacts a first area of a patient's face to form a seal therewith. A support cushion (20, 138, 220) encircles at least a portion of the seal cushion and includes a first end portion that contacts a second area of a patient's face.
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