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Modular pulmonary treatment system

  • US 9,498,592 B2
  • Filed: 01/22/2013
  • Issued: 11/22/2016
  • Est. Priority Date: 01/23/2012
  • Status: Active Grant
First Claim
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1. A patient interface device for delivering a gas to a patient comprising:

  • a mask body for placement against a face of the patient and having a hollow interior space;

    an exhalation valve assembly that includes an exhalation valve member that is configured to vent exhaled air when open;

    a first inhalation valve assembly configured to deliver inhaled air to the hollow interior space;

    a secondary gas port connector in selective communication with the hollow interior space, the secondary gas port connector comprising an inner tubular structure that has an open end for connection to a gas source and includes at least one first window formed in the inner tubular structure; and

    an adjustable outer part that is disposed about the inner tubular structure and is movable relative thereto, the outer part having at least one second window formed and positioned such that when the outer part is mated to the inner tubular structure, the first and second windows can be placed in overlapping registration to allow air to be entrained, the outer part being movable relative to the inner tubular structure between a first position in which there is complete registration between the first and second windows and a second position in which the first and second windows are offset from one another;

    a second inhalation valve assembly configured to deliver inhaled air to the hollow interior space; and

    a heat moisture exchange (HME) unit that is positioned downstream of the second inhalation valve assembly such that inhaled air passing through the second inhalation valve assembly flows through the HME unit and into the hollow interior space where it can be inhaled;

    an emergency inhalation valve assembly that is disposed upstream of each of the first inhalation valve assembly and the second inhalation valve assembly;

    wherein the first inhalation valve assembly is disposed along a first conduit and the second inhalation valve assembly and the HME unit are disposed along a second conduit that is separate from the first conduit;

    wherein the exhalation valve assembly is disposed along the second conduit between the second inhalation valve assembly and the mask body and is in fluid communication with the HME unit such that exhaled air must flow through the HME unit before exiting through the exhalation valve assembly.

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