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

  • US 8,528,558 B2
  • Filed: 03/15/2011
  • Issued: 09/10/2013
  • Est. Priority Date: 05/15/2000
  • Status: Expired due to Fees
First Claim
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1. A respiratory mask, the respiratory mask comprising:

  • (i) a patient interface structured for communication with a patient'"'"'s airways;

    (ii) a gas inlet in the form of a rotatable elbow to supply pressurized breathable gas at a pressure elevated above atmospheric pressure to the patient interface; and

    (iii) a gas washout vent insert on the rotatable elbow, the gas washout vent insert having a plurality of holes, said holes being structured to allow adequate CO2 washout from the patient interface,wherein said plurality of holes is arranged in a plurality of rows, each of said rows having at least 3 of said holes, andwherein each of the holes has a first end positioned on an inside surface of the gas washout vent insert and a second end positioned on an outer surface of the gas washout vent insert, and wherein the first end of each hole has a diameter that is larger than a diameter of the second end of each hole.

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