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US 6,367,472 B1Granted
Respiration humidifier
AssigneeDragerwerk Aktiengesellschaft
InventorJochim Koch
Life of this patent
Estimating the term…
Abstract
An improved, compact and low-maintenance respiration humidifier of a simple design is proposed, which has an outer jacket with a water feed as well as a breathing gas feed line and breathing gas drain line and contains a bundle of hydrophobic hollow fibers. The breathing gas feed line and the breathing gas drain line are in a gas flow connection with the interior of the hollow fibers. The hollow fibers preferably include polytetrafluoroethylene (PTFE) and have structure for electrical heating on their outer, water-side circumferential surface.
Claims19
A respiration humidifier comprising:
- an outer jacket;
- a plurality of hydrophobic hollow fibers positioned in said outer jacket and made of a material permeable to water vapor but impermeable to liquid water;
- a water feed connected to said outer jacket;
- a breathing feed line and a breathing gas drain line in flow connection with an interior of said hollow fibers;
- electrical heating means for electrical heating said hollow fibers on their outer circumferential surface.
2 more elements
A respiration humidifier comprising:
- an outer jacket;
- a plurality of hydrophobic hollow fibers positioned in said outer jacket and made of a material permeable to water vapor but impermeable to liquid water;
- a water feed connected to said outer jacket and in communication with a space between an outside of said fibers and an inside of said outer jacket;
- a breathing feed line and a breathing gas drain line in flow connection with an interior of said hollow fibers;
- heating means for directly and substantially evenly heating an outer circumferential surface of said hollow fibers.
2 more elements
Dependencies are inferred from the claim text.