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US 2025/0018138 A1Published application
Respiratory therapy apparatus and method
AssigneeResMed Pty Ltd
InventorsClancy John DENNIS, Liam HOLLEY, Gordon Joseph MALOUF, Dion Charles Chewe MARTIN, Peter WLODARCZYK
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Abstract
A method, such as in a controller associated with a respiratory therapy device, determines whether high flow therapy is being used by a patient. The method may include determining whether a property of a flow of air being delivered by a respiratory therapy device along an air circuit to an unsealed patient interface contains a significant oscillation within a breathing rate frequency band. The method may also include generating, dependent on the determination, an indication of whether high flow therapy is being used by the patient.
Claims27
A method of one or more processors for determining whether high flow therapy is being used by a patient, the method comprising:
- calculating, within a breathing rate frequency band and over a window of predetermined duration, a magnitude of variation of a resistance to a flow of air delivered during a high flow therapy operation mode by a respiratory therapy device along an air circuit to an unsealed patient interface,
- determining whether the resistance to flow is within a predetermined range, wherein the predetermined range is selected such that resistance values contained within the predetermined range characterize the unsealed patient interface during patient use of high flow therapy when the unsealed patient interface is coupled at the patient's airway entrance,
- generating an output indication of whether high flow therapy is being used by the patient based on (a) a determination of whether the magnitude of variation of the resistance to flow is greater than a magnitude threshold, and (b) the determination of whether the resistance to flow is within the predetermined range, and
- controlling a change in operation of the respiratory therapy device based on the output indication.
1 more element
An apparatus for delivering high flow therapy to a patient, the apparatus comprising:
- a servo-controlled blower configured to generate a flow of air along an air circuit to an unsealed patient interface during a high flow therapy operation mode;
- one or more processors;
- one or more transducers configured to generate one or more signals representing respective properties of the flow of air being generated,
- wherein the one or more processors are configured to:
- receive the one or more signals;
- calculate, within a breathing rate frequency band and over a window of predetermined duration, a magnitude of variation of a resistance to the flow of air based on the one or more signals;
- control a determination of whether the resistance to flow is within a predetermined range, wherein the predetermined range is selected such that resistance values contained within the predetermined range characterize the unsealed patient interface during patient use of high flow therapy when the unsealed patient interface is coupled at the patient's airway entrance;
- generate an output indication of whether high flow therapy is being used by the patient based on (a) a determination of whether the magnitude of variation of the resistance to flow is greater than a magnitude threshold, and (b) the determination of whether the resistance to flow is within the predetermined range;
- and
- control a change in operation of the apparatus for delivering high flow therapy to the patient based on the output indication.
7 more elements
A high flow therapy system comprising:
- an unsealed patient interface;
- an air circuit configured to be connected to the unsealed patient interface;
- a servo-controlled blower configured to generate a flow of air along an air circuit during a high flow therapy operation mode;
- one or more transducers configured to generate one or more signals representing respective properties of the flow of air being generated;
- and
- one or more processors configured to:
- receive the one or more signals;
- calculate, within a breathing rate frequency band and over a window of predetermined duration, a magnitude of variation of a resistance to the flow of air based on the one or more signals;
- control a determination of whether the resistance to flow is within a predetermined range, wherein the predetermined range is selected such that resistance values contained within the predetermined range characterize the unsealed patient interface during patient use of high flow therapy when the unsealed patient interface is coupled at the patient's airway entrance;
- generate an output indication of whether high flow therapy is being used by the patient based on (a) a determination of whether the magnitude of variation of the resistance to flow is greater than a magnitude threshold, and (b) the determination of whether the resistance to flow is within the predetermined range;
- and
- control a change in operation of the high flow therapy system based on the output indication.
9 more elements
Dependencies are inferred from the claim text.