Heating device for respiration gas
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United States of America Patent
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Issued Date -
Oct 10, 2002
app pub date -
Mar 25, 2002
filing date -
Apr 4, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A heating device has a microwave source and a radiating antenna for coupling microwaves from the source into respiration gas in a gas flow-path of a patient breathing circuit, such as in an expiration gas-flow section internally located in a mechanical breathing aid. The microwave source and antenna are arranged to couple microwave energy sufficient to heat respiration gas in the flow path at a location at or upstream of a measuring device, such as a flow meter, to prevent condensation at the device. A detector and signal processor also are provided to calculate a moisture content from the microwave interaction with the respiration gas.
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