Surgery – Respiratory method or device – Inhaled gas heated or humidified by exhaled gas
Patent
1992-08-12
1994-10-25
Burr, Edgar S.
Surgery
Respiratory method or device
Inhaled gas heated or humidified by exhaled gas
12820527, 12820617, A62B 1808
Patent
active
053579470
ABSTRACT:
An improved respiratory face mask is provided for filtering inhaled and exhaled air, while discharging exhaled gases in a manner reducing undesired re-inhalation, and reducing capture and retention of exhaled air within the mask and against the face of the wearer. The face mask comprises a mask base adapted to fit in close conformance over a person's nose and mouth, in combination with a generally cup-shaped receiver formed from a porous filter material and carried by the mask base to define a rearwardly open chamber for receiving exhaled gases. In use, exhaled gases flow with minimal resistance to the receiver chamber, at a location spaced forwardly from the person's face, for discharge through the substantial surface area of the receiver material to the surrounding environment.
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Burr Edgar S.
Lewis Aaron J.
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