US 11,724,054 B2
Patient interface with blowout prevention for seal-forming portion
Matthew Eves, Sydney (AU); Rupert Christian Scheiner, Sydney (AU); Lemmy Nga, Sydney (AU); and Gerard Michael Rummery, Woodford (AU)
Assigned to ResMed Pty Ltd, Bella Vista (AU)
Filed by ResMed Pty Ltd, Bella Vista (AU)
Filed on May 10, 2021, as Appl. No. 17/316,010.
Application 17/316,010 is a continuation of application No. 15/560,957, granted, now 11,052,210, previously published as PCT/AU2016/050228, filed on Mar. 24, 2016.
Claims priority of provisional application 62/222,503, filed on Sep. 23, 2015.
Claims priority of provisional application 62/138,009, filed on Mar. 25, 2015.
Prior Publication US 2021/0260322 A1, Aug. 26, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 16/06 (2006.01); A61M 16/00 (2006.01); A61M 16/08 (2006.01); A61M 16/16 (2006.01); A61M 16/10 (2006.01)
CPC A61M 16/0616 (2014.02) [A61M 16/0066 (2013.01); A61M 16/06 (2013.01); A61M 16/0622 (2014.02); A61M 16/0633 (2014.02); A61M 16/0666 (2013.01); A61M 16/0683 (2013.01); A61M 16/0825 (2014.02); A61M 16/0069 (2014.02); A61M 16/107 (2014.02); A61M 16/109 (2014.02); A61M 16/1055 (2013.01); A61M 16/1095 (2014.02); A61M 16/16 (2013.01); A61M 2202/0225 (2013.01); A61M 2205/42 (2013.01); A61M 2207/00 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A patient interface for sealed delivery of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance to the patient's airways including at least entrance of a patient's nares, wherein the patient interface is configured to maintain a therapy pressure in a range of about 3 cmH2O to about 40 cmH2O above ambient air pressure in use, throughout the patient's respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing, the patient interface comprising:
a sealing structure to seal the patient interface against the patient's face, the sealing structure comprising:
a sealing surface configured to form a seal around a periphery of the entrance to the patient's airways, and
a loop comprising a portion of the sealing structure folded inwards of an outer perimeter of the sealing structure and attached to an interior surface of the sealing structure such that the interior surface of the sealing structure is continuous about the loop, an exterior portion of the loop that is opposite the interior surface of the sealing structure comprises a portion of the sealing surface;
a positioning and stabilising structure to maintain the sealing structure in sealing contact with an area surrounding an entrance to the patient's airways while maintaining a therapeutic pressure at the entrance to the patient's airways;
a plenum chamber pressurised at a pressure above ambient pressure in use; and
a gas washout vent configured to allow a flow of patient exhaled CO2 to an exterior of the patient interface to minimise rebreathing of exhaled CO2 by the patient,
wherein the loop forms a hollow interior that is in fluid communication with the pressure above ambient pressure in the plenum chamber during use.