US 11,938,267 B2
Determination of leak during CPAP treatment
David John Bassin, Coogee (AU)
Assigned to ResMed Pty Ltd, Bella Vista (AU)
Filed by ResMed Pty Ltd, Bella Vista (AU)
Filed on May 6, 2020, as Appl. No. 16/867,623.
Application 15/203,427 is a division of application No. 13/874,668, filed on May 1, 2013, granted, now 9,408,989, issued on Aug. 9, 2016.
Application 16/867,623 is a continuation of application No. 15/203,427, filed on Jul. 6, 2016, granted, now 10,675,424.
Application 13/874,668 is a continuation of application No. 13/542,331, filed on Jul. 5, 2012, granted, now 8,459,260, issued on Jun. 11, 2013.
Application 13/542,331 is a continuation of application No. 12/438,758, granted, now 8,256,418, issued on Sep. 4, 2012, previously published as PCT/AU2007/001237, filed on Aug. 30, 2007.
Claims priority of provisional application 60/823,934, filed on Aug. 30, 2006.
Prior Publication US 2020/0368467 A1, Nov. 26, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 16/00 (2006.01); A61M 16/06 (2006.01)
CPC A61M 16/0057 (2013.01) [A61M 16/024 (2017.08); A61M 16/06 (2013.01); A61M 2016/0021 (2013.01); A61M 2016/0036 (2013.01); A61M 2205/15 (2013.01); A61M 2205/16 (2013.01); A61M 2205/50 (2013.01)] 24 Claims
 
1. A method of determining a mask leak conductance in a patient respiratory device, comprising:
calculating, with filtered measures of flow and pressure, a first estimate of leak conductance which responds relatively quickly to changes in leak conductance,
calculating, with the filtered measures of flow and pressure, a second estimate of leak conductance which responds more slowly to changes in leak conductance, and
determining the mask leak conductance as a function of the first and second estimates of leak conductance.