Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1990-05-24
1991-09-03
Burr, Edgar S.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820418, 12820125, 12820312, 12820512, 128910, A61M 1610
Patent
active
050443631
ABSTRACT:
A cartridge loosely containing powdered activated charcoal is connected to a conventional anesthetic administration system of the type commonly used in veterinary surgical facilities. The cartridge is readily supported by a conventional anesthetic cart and is usable in both rebreathing and pass-through operation of the anesthetic-administration system. Gases of vaporized anesthetic substances that typically are released from the pop-off valve of liquid anesthetic containers or in the exhalations from the animal patient are both selectively directed through the activated charcoal without the need for motors, blowers, or other devices requiring power. The invention utilizes commonly available materials such as PVC pipe and end fittings, powdered activated charcoal and fiberglass filter elements, and assorted commercially available pipe fittings. In relatively compact form, this invention enables the removal of approximately 95% of anesthetic substances that otherwise would be released where they would likely be breathed in by and do harm to surgery personnel. The cartridge may be shaken to rearrange the particles of activated charcoal, to thereby generate new gas-flow paths between newly-exposed surfaces that can adsorb more anesthetic substances.
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Burr Edgar S.
Raciti E. P.
The United States of America as represented by the Department of
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