US 12,005,186 B2
Closed loop oxygen control
Rhys Matthew James Williams, Auckland (NZ); Russel William Burgess, Auckland (NZ); David Martin Russell, Auckland (NZ); Anton Kim Gulley, Auckland (NZ); Charles Grady Cantrell, Auckland (NZ); and Yi Lin Huang, Auckland (NZ)
Assigned to FISHER & PAYKEL HEALTHCARE LIMITED, Auckland (NZ)
Appl. No. 16/753,947
Filed by FISHER & PAYKEL HEALTHCARE LIMITED, Auckland (NZ)
PCT Filed Oct. 5, 2018, PCT No. PCT/NZ2018/050137
§ 371(c)(1), (2) Date Apr. 6, 2020,
PCT Pub. No. WO2019/070136, PCT Pub. Date Apr. 11, 2019.
Claims priority of provisional application 62/596,722, filed on Dec. 8, 2017.
Claims priority of provisional application 62/569,429, filed on Oct. 6, 2017.
Prior Publication US 2021/0361899 A1, Nov. 25, 2021
Int. Cl. A61M 16/00 (2006.01); A61M 16/06 (2006.01); A61M 16/08 (2006.01); A61M 16/10 (2006.01); A61M 16/12 (2006.01); A61M 16/16 (2006.01); A61M 16/20 (2006.01)
CPC A61M 16/0003 (2014.02) [A61M 16/0051 (2013.01); A61M 16/0066 (2013.01); A61M 16/026 (2017.08); A61M 16/0672 (2014.02); A61M 16/0816 (2013.01); A61M 16/105 (2013.01); A61M 16/125 (2014.02); A61M 16/161 (2014.02); A61M 16/201 (2014.02); A61M 2016/003 (2013.01); A61M 2016/1025 (2013.01); A61M 2205/3375 (2013.01); A61M 2205/583 (2013.01); A61M 2230/005 (2013.01); A61M 2230/06 (2013.01); A61M 2230/205 (2013.01); A61M 2230/42 (2013.01); A61M 2230/435 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A respiratory apparatus that provides a flow of gases to a patient, wherein the respiratory apparatus is configured to deliver high flow therapy to the patient, the respiratory apparatus comprising:
a gases composition sensor configured to determine at least a measured fraction of delivered oxygen content (FdO2) of gases flow during operation of the respiratory apparatus, wherein the gases composition sensor is an ultrasonic sensor system;
a controller configured to control delivery of gases to the patient using closed loop control, wherein the controller is configured to:
receive patient parameter data indicative of oxygen saturation (SpO2) of the patient from at least one sensor;
execute a control phase, wherein operation of the respiratory apparatus during a therapy session is based at least in part on the patient parameter data, wherein the control phase includes determining a target FdO2, wherein the target FdO2 is determined based at least in part on a target SpO2, measured SpO2, measured FdO2, and a previous target FdO2.