US 11,850,361 B2
Control of pressure for breathing comfort
David James Fleming, Cardiff, CA (US); and Michael Grunberg, Canoga Park, CA (US)
Assigned to RESMED MOTOR TECHNOLOGIES INC., Chatsworth, CA (US)
Filed by RESMED MOTOR TECHNOLOGIES INC., Chatsworth, CA (US)
Filed on Jun. 7, 2021, as Appl. No. 17/340,722.
Application 17/340,722 is a continuation of application No. 14/400,817, granted, now 11,052,206, previously published as PCT/US2013/040749, filed on May 13, 2013.
Claims priority of provisional application 61/646,571, filed on May 14, 2012.
Prior Publication US 2022/0062570 A1, Mar. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 16/00 (2006.01); A61B 5/087 (2006.01); A61B 5/097 (2006.01); A61M 16/06 (2006.01); A61M 16/20 (2006.01); A61M 16/10 (2006.01)
CPC A61M 16/0069 (2014.02) [A61B 5/087 (2013.01); A61B 5/097 (2013.01); A61M 16/0003 (2014.02); A61M 16/024 (2017.08); A61M 16/06 (2013.01); A61M 16/20 (2013.01); A61M 16/0683 (2013.01); A61M 16/107 (2014.02); A61M 16/1055 (2013.01); A61M 2016/003 (2013.01); A61M 2016/0021 (2013.01); A61M 2016/0027 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/3327 (2013.01); A61M 2205/3334 (2013.01); A61M 2205/505 (2013.01); A61M 2205/52 (2013.01); A61M 2230/40 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A method of a respiratory treatment apparatus for determining an indication of inspiration or expiration, the method comprising:
measuring current supplied to a blower configured to provide a respiratory treatment;
deriving first and second current signals from the measured current by filtering the measured current, the first derived current signal being a long term measure of current, the second derived current signal being a short term measure of current; and
repeatedly determining, by a processor, indications of inspiration or expiration by comparison of the first derived current signal and the second derived current signal, wherein the comparison generates a control signal to set a speed change of the blower,
wherein a first compensation signal is added to the first derived current signal based on an indication of inspiration of the indications, and a second compensation signal is added to the first derived current signal based on an indication of expiration of the indications, wherein the first compensation signal and the second compensation signal are values of current.