| 摘要 |
A device (20) for preventing or reducing the passage of air through the mouth (22). The device (20) comprises a top lip member (26) and a bottom lip member (28) having a space (34) therebetween. The space (34) is configured such that, in use, when the top and bottom lips (22T & 22B) of a patient are forced through the space (34), the top and bottom lip members (26 & 28) squeeze the top and bottom lips (22T & 22B) together thereby substantially sealing the mouth (22).
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