US 9,808,590 B2
Method and device for carrying out a signal-processing viewing of a measurement signal that is correlated to the respiratory activity of an individual
Stefan Rolf Madaus, Graefelfing (DE); Jorg Meier, Martinsried (DE); Dieter Heidmann, Geretsried (DE); and Hartmut Schneider, Lutherville, MD (US)
Assigned to RESMED R&D GERMANY GMBH, Martinsried (DE)
Filed by ResMed R&D Germany GmbH, Martinsried (DE)
Filed on Apr. 9, 2014, as Appl. No. 14/248,771.
Application 14/248,771 is a continuation of application No. 12/662,323, filed on Apr. 12, 2010, granted, now 8,728,000.
Application 12/662,323 is a continuation of application No. 10/531,476, granted, now 7,722,546, issued on May 25, 2010, previously published as PCT/EP03/11524, filed on Oct. 17, 2003.
Claims priority of application No. 102 48 590 (DE), filed on Oct. 17, 2002.
Prior Publication US 2014/0290656 A1, Oct. 2, 2014
Int. Cl. A61B 5/08 (2006.01); A61M 16/00 (2006.01); A61B 5/087 (2006.01); A61F 5/56 (2006.01); A61B 5/085 (2006.01); A61B 5/00 (2006.01)
CPC A61M 16/0069 (2014.02) [A61B 5/085 (2013.01); A61B 5/087 (2013.01); A61B 5/4836 (2013.01); A61B 5/7239 (2013.01); A61B 5/7282 (2013.01); A61F 5/56 (2013.01); A61M 16/00 (2013.01); A61M 16/0003 (2014.02); A61M 16/0051 (2013.01); A61B 5/7275 (2013.01); A61M 2016/0018 (2013.01); A61M 2016/0033 (2013.01); A61M 2016/0036 (2013.01); A61M 2230/005 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of controlling pressure provided to a patient by a pressure regulating device, the method comprising:
providing a supply of respiratory gas at a first pressure level above ambient pressure level;
measuring a signal indicative of respiratory activity;
determining, using a signal processing device, an inspiration phase and an expiration phase of each breath from the signal;
detecting, using the signal processing device, an inspiration time and an expiration time of each breath for successive breaths;
determining, using the signal processing device, a ratio of the inspiration time to the expiration time for each said breath;
detecting, using the signal processing device, a variation in the ratio;
determining, using the signal processing device, presence of obstruction of the upper respiratory tract based on the in the ratio;
and adjusting the first pressure level based on the determined presence of obstruction.