US 11,717,633 B2
Process, computer program, device and ventilation system for the detection of a leak in a patient gas module
Gerd Peter, Lübeck (DE); Uwe Schmid, Lübeck (DE); and Christoph Osterloh, Klempau (DE)
Assigned to Drägerwerk AG & Co. KGaA, Lübeck (DE)
Appl. No. 16/771,632
Filed by Drägerwerk AG & Co. KGaA, Lübeck (DE)
PCT Filed Dec. 12, 2018, PCT No. PCT/EP2018/084444
§ 371(c)(1), (2) Date Jun. 10, 2020,
PCT Pub. No. WO2019/115571, PCT Pub. Date Jun. 20, 2019.
Claims priority of application No. 10 2017 011 625.3 (DE), filed on Dec. 15, 2017.
Prior Publication US 2020/0353197 A1, Nov. 12, 2020
Int. Cl. A61M 16/00 (2006.01); A61M 16/08 (2006.01); A61B 5/083 (2006.01); A61M 16/20 (2006.01); A61M 16/22 (2006.01); A61M 16/10 (2006.01)
CPC A61M 16/085 (2014.02) [A61B 5/0836 (2013.01); A61M 16/0066 (2013.01); A61M 16/0808 (2013.01); A61M 16/0833 (2014.02); A61M 16/208 (2013.01); A61M 16/22 (2013.01); A61M 2016/0027 (2013.01); A61M 2016/103 (2013.01); A61M 2016/1025 (2013.01); A61M 2016/1035 (2013.01); A61M 2202/0208 (2013.01); A61M 2202/0225 (2013.01); A61M 2202/0241 (2013.01); A61M 2202/0283 (2013.01); A61M 2205/15 (2013.01); A61M 2205/52 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process for the detection of a leak in a patient gas module, which suctions and analyzes a continuous sample gas stream from a ventilated patient, the process comprising the steps of:
determining a first time curve of a carbon dioxide concentration in a breathing gas mixture of the patient;
determining a second time curve of a concentration of an other gas in the breathing gas mixture, which other gas is different from carbon dioxide;
determining a statistical similarity indicator between the first time curve and the second time curve; and
detecting the leak based on a change of the similarity indicator, wherein the similarity indicator measures a phase shift between the first curve and the second curve.