US 12,440,642 B2
Control for pressure of a patient interface
Benjamin Matthew Austin, Sydney (AU); and Liam Holley, Sydney (AU)
Assigned to ResMed Pty Ltd, (AU)
Filed by ResMed Pty Ltd, Bella Vista (AU)
Filed on Mar. 30, 2022, as Appl. No. 17/708,066.
Application 17/708,066 is a continuation of application No. 15/031,358, granted, now 11,318,275, previously published as PCT/AU2014/050315, filed on Oct. 28, 2014.
Claims priority of application No. 2013904199 (AU), filed on Oct. 30, 2013.
Prior Publication US 2022/0362505 A1, Nov. 17, 2022
Int. Cl. A61M 16/20 (2006.01); A61M 16/00 (2006.01); A61M 16/06 (2006.01); A61M 16/10 (2006.01); A61M 16/16 (2006.01)
CPC A61M 16/202 (2014.02) [A61M 16/0051 (2013.01); A61M 16/0069 (2014.02); A61M 16/026 (2017.08); A61M 16/0616 (2014.02); A61M 16/0627 (2014.02); A61M 2016/0021 (2013.01); A61M 2016/0027 (2013.01); A61M 2016/0036 (2013.01); A61M 16/0683 (2013.01); A61M 16/1055 (2013.01); A61M 16/107 (2014.02); A61M 16/16 (2013.01); A61M 16/205 (2014.02); A61M 2202/0208 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3584 (2013.01); A61M 2205/502 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An apparatus for controlling a supply of breathable gas at a positive pressure for amelioration or treatment of a respiratory disorder, the apparatus comprising:
a controller configured to:
control a therapy apparatus for providing a supply of breathable gas, the therapy apparatus configured to couple with a patient interface to deliver the supply of breathable gas to an airway of a patient,
determine an estimate of pressure in the patient interface for a breathing cycle of the patient based on an expiratory flow model, wherein the estimate of pressure in the patient interface is determined without using a measure indicative of pressure in the patient interface obtained during an expiratory portion of the breathing cycle, and
adjust a pressure in the patient interface based on the determined estimate of pressure in the patient interface and a target pressure.