Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1990-04-23
1991-05-21
Burr, Edgar S.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820512, 12820527, 12820517, A62B 2302
Patent
active
050166280
ABSTRACT:
A disposable CO.sub.2 absorber for applications in rebreathing systems uses a flexible bag-like pouch to contain CO.sub.2 absorbent granules. The pouch includes an intake port having a one-way valve at the top of the pouch and an outlet or exhaust port including a perforated cylindrical tube or perforated disk in the bottom of the pouch. Exhaled gas containing CO.sub.2 passes through the one-way valve at the intake port and contacts the absorbent granules where a chemical reaction bonds the CO.sub.2 with the granules. The residual gas, substantially free of CO.sub.2, passes out of the pouch through the exhaust ports for rebreathing by the user. The flexure of the pouch increases the efficiency with which the CO.sub.2 is absorbed.
REFERENCES:
patent: 1229050 (1917-06-01), Donald
patent: 3240567 (1966-03-01), Caparelli
Burr Edgar S.
Environmental Support Systems, Inc.
Meyer Stuart P.
Raciti Eric P.
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