Cushion inside a cushion patient interface
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United States of America Patent
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Oct 30, 2007
Grant Date -
Nov 9, 2006
app pub date -
Apr 10, 2006
filing date -
Apr 13, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A patient interface device 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 having a patient side and an outer side opposite the patient side adapted for receiving a supply of gas. A seal cushion contacts a first area of a patient's face to form a seal therewith. A support cushion encircles the seal cushion and includes a first end portion that contacts a second area of a patient's face.
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