Respiratory mask having gas washout vent and gas washout vent assembly for a respiratory mask

  • US 7,926,487 B2
  • Filed: 04/28/2006
  • Issued: 04/19/2011
  • Est. Priority Date: 05/15/2000
  • Status: Active Grant
First Claim
Patent Images

1. A respiratory mask comprising:

  • a patient interface structured for communication with a patient'"'"'s airways in use;

    a gas inlet to supply pressurized breathable gas in the range of 3-20 cm H2O to the patient interface; and

    a gas washout vent portion having a plurality of holes therein, said holes having a diameter selected to allow adequate CO2 washout from the patient interface at a lowest end of the pressure range,wherein said plurality of holes is arranged in a plurality of rows, each said row having at least 3 of said holes, andwherein each of the holes has a first end positioned on an inside surface of the mask and a second end positioned on an outer surface of the mask, and wherein the first end has a diameter that is smaller than a diameter of the second end.

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