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US 2026/0241124 A1Published application
Closed loop oxygen control
AssigneeFisher & Paykel Healthcare Limited
InventorsAnton Kim GULLEY, David Martin RUSSELL
Life of this patent
Estimating the term…
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.
Claims91
A respiratory apparatus for providing a flow of gases to a patient, the respiratory apparatus comprising:
- a gases composition sensor configured to determine at least an oxygen content (FdO2) of the flow of gases during operation of the respiratory apparatus;
- a controller configured to control delivery of the flow of gases to the patient using closed loop control, wherein the controller is configured to:
- receive patient parameter data indicative of an oxygen saturation (SpO2) of the patient from at least one sensor;
- receive data indicative of a measured fraction of delivered oxygen (FdO2) of the flow of gases from the gases composition sensor;
- receive flow rate data, the flow rate data corresponding to or indicative of a flow rate of the flow of gases provided by the respiratory apparatus;
- determine at least one time-related parameter, the or each time related parameter based at least in part on the flow rate data;
- and
- generate a patient-specific model, the patient-specific model based at least in part on the at least one time-related parameter;
- wherein the patient-specific model is used to predict a change in the oxygen saturation (SpO2) of the patient in response to a change in the measured fraction of delivered oxygen (FdO2) of the flow of gases.
6 more elements
The respiratory apparatus of claim 1-52, wherein the gases composition sensor is positioned downstream of a blower module of the respiratory apparatus.
A respiratory apparatus for providing a flow of gases to a patient, the respiratory apparatus comprising:
- a gases composition sensor configured to determine at least a fraction of delivered oxygen (FdO2) of the flow of gases during operation of the respiratory apparatus;
- a controller configured to control delivery of the flow 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;
- receive data indicative of a measured fraction of delivered oxygen (FdO2) of the flow of gases from the gases composition sensor;
- receive flow rate data, the flow rate data corresponding to or indicative of the flow rate of the flow of gases provided by the respiratory apparatus;
- compare the flow rate data to a defined flow rate threshold;
- determine a set of time-related parameters using a first model or a second model based at least in part on the result of the comparison of the flow rate data to the defined flow rate threshold;
- and
- generate a patient-specific model based at least in part on the set of time-related parameters, wherein the patient-specific model is used to predict a change in the oxygen saturation (SpO2) of the patient in response to a change in the measured fraction of delivered oxygen (FdO2) of the flow of gases.
6 more elements
A respiratory system for providing a flow of gases to a patient, the respiratory system comprising:
- a gases composition sensor configured to determine at least a fraction of delivered oxygen (FdO2) of the flow of gases during operation of the respiratory system;
- a patient sensor configured to determine at least an oxygen saturation (SpO2) of the patient;
- a controller configured to control delivery of the flow 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 the patient sensor;
- receive data indicative of a measured fraction of delivered oxygen (FdO2) of the flow of gases from the gases composition sensor;
- receive flow rate data, the flow rate data corresponding to or indicative of the flow rate of the flow of gases provided by the respiratory system;
- and
- generate a patient-specific model based at least in part on the flow rate data, wherein the patient-specific model is used to predict a change in the oxygen saturation (SpO2) of the patient in response to a change in the fraction of delivered oxygen (FdO2) of the flow of gases.
5 more elements
A method for controlling delivery of a flow of gases to a patient using closed loop control, the method comprising:
- receiving patient parameter data indicative of an oxygen saturation (SpO2) of the patient from at least one sensor;
- receiving data indicative of a measured fraction of delivered oxygen (FdO2) of the flow of gases from a gases composition sensor;
- receiving flow rate data, the flow rate data corresponding to or indicative of a flow rate of the flow of gases;
- determining at least one time-related parameter, the or each time related parameter based at least in part on the flow rate data;
- and
- generating a patient-specific model, the patient-specific model based at least in part on the at least one time-related parameter;
- wherein the patient-specific model is used to predict a change in the oxygen saturation (SpO2) of the patient in response to a change in the measured fraction of delivered oxygen (FdO2) of the flow of gases.
4 more elements
A respiratory apparatus for providing a flow of gases to a patient, the respiratory apparatus comprising:
- a supplementary gas inlet valve configured to receive oxygen from an oxygen supply;
- a flow generator operatively connected to the supplementary gas inlet valve and configured to generate a flow of gases;
- a user interface comprising a display;
- and
- a controller configured to control delivery of the flow of gases to the patient using closed loop control, wherein the controller is configured to:
- determine a patient type based on one or more inputted or estimated or measured parameters of, or associated with the patient;
- determine a patient-specific model, the patient-specific model based at least in part on the patient type determined;
- and
- initiate closed-loop control of the concentration of oxygen of the flow of gases using the confirmed patient-specific model.
6 more elements
Dependencies are inferred from the claim text.