Method of conveying breathing gases to or from a patient

  • US 7,958,891 B2
  • Filed: 05/06/2009
  • Issued: 06/14/2011
  • Est. Priority Date: 06/21/2000
  • Status: Expired due to Term
First Claim
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1. 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, said tube comprising;

    an enclosing outer wall defining a flexible gases passageway between said first end and said second end, andat least a region of said enclosing outer wall being of a material that allows the transmission of water vapour without allowing the transmission of liquid water or respiratory gases through said enclosing outer wall, and wherein said at least a region and said second end are separate from each other;

    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 enclosing outer wall of said tube.

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