Method of conveying breathing gases to or from a patient
AssigneeFisher & Paykel Healthcare Limited
InventorsDaniel John SMITH, David Peter BALDWIN
Life of this patent
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Abstract
A method of conveying humid breathing gases from a patient through a breathable breathing tube. The breathing tube includes a heater associated, at least in part, with a portion of hydrophilic material. The purpose of the heater is to evaporate any condensed liquid collecting in the conduit, which is first sucked tip by the hydrophilic material. The heated wick reduces the risk of collected water being passed to the patient and causing choking fits or discomfit. It is preferred that the heated wick lies freely in the conduit to settle at low points in the conduit where condensation may collect.
Claims16
A method of conveying humid breathing gases from a patient comprising:
- providing a flexible breathing tube having a first end and a second end wherein said tube is connected to a patient interface at said first end;
- conveying said breathing gases from said patient through said tube;
- heating said gases in said tube;
- transmitting at least some water vapour from said humid breathing gases through the wall of said tube.
A method of conveying humid breathing gases to and from a patient comprising:
- providing a flexible coaxial breathing tube, having a patient end and a distal end, comprising:
- an outer conduit having an enclosing outer wall,
- an inner conduit having an enclosing wall, said inner conduit located within said outer conduit,
- a patient interface at said patient and,
- supplying said breathing gases to said patient through a supply passageway being one of said inner conduit or the space between said inner conduit and said outer conduit,
- returning gases from said patient through a return passageway being the other of said inner conduit or the space between said inner conduit and said outer conduit,
- heating said returning gases with a heater;
- transmitting at least some water vapour from said returning gases through the wall of said inner conduit.
Dependencies are inferred from the claim text.