Closed loop oxygen control
AssigneeFisher & Paykel Healthcare Limited
InventorsRhys Matthew James Williams, Russel William Burgess, David Martin Russell, Anton Kim Gulley, Charles Grady Cantrell, Yi Lin Huang
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Abstract
The present disclosure provides for a flow therapy apparatus that can implement one or more closed loop control systems to control the flow of gases of a flow therapy apparatus. The flow therapy apparatus can monitor blood oxygen saturation (SpO2) of a patient and control the fraction of oxygen delivered to the patient (FdO2). The flow therapy apparatus can automatically adjust the FdO2 in order to achieve a targeted SpO2 value for the patient.
Claims17
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.
Dependencies are inferred from the claim text.