Breathing assistance apparatus

  • US 9,539,405 B2
  • Filed: 03/31/2016
  • Issued: 01/10/2017
  • Est. Priority Date: 02/23/2004
  • Status: Active Grant
First Claim
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1. A mask assembly including a nasal cannula prong part and a nasal cannula body part for delivering positive airway pressure to a user in use, the mask comprising:

  • the nasal cannula prong part comprising a hollow body, an inlet opening of the hollow body, and first and second nasal prongs extending from the hollow body, the first and second nasal prongs formed as a flexible single piece, a horizontal direction of the nasal cannula prong part extending from the inlet opening toward the first and second nasal prongs, a vertical direction extending perpendicular to the horizontal direction;

    the nasal cannula body part comprising a central portion with at least one bias flow vent, an inlet, an outlet, and an outer surface having at least a left side curved portion and a right side curved portion, the left side curved portion comprising a left side apex and the right side curved portion comprising a right side apex, the outer surface having a first height along the vertical direction;

    a first headgear extension having a first end, the first end of the first headgear extension connected to the left side apex, the first end of the first headgear extension having a second height along the vertical direction at the connection between the first end and the left side apex;

    a second headgear extension having a first end connected to the right side apex, the first end of the second headgear extension having a third height along the vertical direction at the connection between the first end of the second headgear extension and the right side apex, wherein the second and third heights are smaller than the first height;

    a headgear strap configured to maintain the nasal cannula prong part in a position with the first and second nasal prongs against a user'"'"'s nares in use, the headgear strap having first and second ends, the first end connected to the first headgear extension and the second end connected to the second headgear extension; and

    an inspiratory conduit connected to the inlet of the nasal cannula body part and configured to deliver pressurized gases into the nasal cannula body part and the nasal cannula prong part for inhalation by a user in use.

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