Gasless extra-corporeal carbon dioxide removal
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsIan J. Stewart, Jeremy W. Cannon
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Abstract
A carbon dioxide absorption medium. The absorption medium includes a plurality of hollow fibers and a plurality of binder particles. The hollow fibers have walls comprising a selectively permeable membrane that is configured to permit passage of gaseous carbon dioxide but not liquids. The plurality bind particles are dispersed between the hollow fibers and comprise an absorbent material configured to absorb gaseous carbon dioxide and to bind the carbon dioxide in a solid state.
Claims23
A carbon dioxide absorption medium comprising:
- a plurality of hollow fibers, each hollow fiber of the plurality having a proximal end, a distal end, a lumen extending between the proximal and distal ends, and a wall surrounding the lumen, the wall of each hollow fiber of the plurality comprising a membrane selectively permeable to gaseous carbon dioxide;
- and
- a plurality of binder particles dispersed between hollow fibers of the plurality, each binder particle of the plurality being configured to absorb gaseous carbon dioxide and to bind and to retain the carbon dioxide in a solid state.
A method for removing carbon dioxide from blood, the method comprising:
- transporting blood from a patient to a carbon dioxide absorption cartridge, the carbon dioxide absorption cartridge comprising:
- a housing having an internal cavity therein;
- and
- a carbon dioxide absorption medium disposed within the internal cavity of the housing, the carbon dioxide absorption medium comprising a plurality of hollow fibers, each hollow fiber of the plurality having a proximal end, a distal end, a lumen extending between the proximal and distal ends, and a wall surrounding the lumen, the wall of each hollow fiber of the plurality comprising a membrane selectively permeable to gaseous carbon dioxide and a plurality of binder particles dispersed between hollow fibers of the plurality, each binder particle of the plurality being configured to absorb gaseous carbon dioxide and bind the carbon dioxide in a solid state;
- moving the blood through the carbon dioxide absorption cartridge, thereby removing carbon dioxide from the blood;
- and
- transporting the blood from the carbon dioxide absorption cartridge to the patient,
- wherein neither a carrier fluid flow nor a sweep fluid flow is required for removing carbon dioxide from the blood of the patient.
Dependencies are inferred from the claim text.