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Publication Number
US-11865259-B1
Publication Date
2024-01-09
Expiration Date
Abstract
A device and a method for respiratory therapy. The device is configured with at least two operating modes, which include a first operating mode for providing HFNC support for a patient and a second operating mode for providing NIV support or INV support for the patient; the device includes a memory stored with instructions and a processor, the processor is configured to call and run the instructions stored in the memory to execute operations of: obtaining an ROX index based on first parameters; and triggering mode switching of the device according to the ROX index and a preset triggering strategy for switching the operating mode of the device.
Core Innovation
The invention relates to an integrated respiratory therapy device configured with at least two operating modes, comprising a first operating mode for providing high-flow nasal cannula (HFNC) support and a second operating mode for providing non-invasive ventilation (NIV) support or invasive ventilation (INV) support. The device includes a memory and a processor executing instructions to obtain a Respiratory Rate-Oxygenation (ROX) index based on first parameters, and mode switching is triggered according to the ROX index and a preset triggering strategy.
The preset triggering strategy includes manual-based triggering strategy, semi-automatic triggering strategy, and fully automatic triggering strategy. In at least one described workflow, the ROX index is compared to a preset value, user terminal notifications are issued including first notification and second notification, and mode switching is performed based on a switching instruction, including user confirmation where applicable.
The device further integrates humidification components that humidify a gas flow delivered to the patient, where the humidification components comprise a temperature sensor and a heating element connected to the temperature sensor. The temperature of the heating element is adjustable based on a measured flow rate of the gas flow and is described as adjustable using a formula in which heating element temperature depends on Q(t) and pre-stored coefficients, and the coefficients are obtained by fitting experimental data from a series of experiments and are pre-stored in the memory.
Claims Coverage
The independent claims include two independent claim sets, device and method. Across the independent claims, there are three main inventive features: ROX-index-based mode switching with a preset triggering strategy, humidification with flow-sensor-based heating-element temperature adjustment, and a coefficient-based formula whose coefficients are obtained by fitting experimental data and pre-stored in memory.
ROX-index-based mode switching between HFNC and NIV/INV
A device configured with at least two operating modes comprising a first operating mode for providing high-flow nasal cannula (HFNC) support and a second operating mode for providing non-invasive ventilation (NIV) support or invasive ventilation (INV) support, wherein the processor obtains a Respiratory Rate-Oxygenation (ROX) index based on first parameters and triggers mode switching according to the ROX index and a preset triggering strategy.
Preset triggering strategy for operating mode switching
Triggering mode switching of the device according to the ROX index and a preset triggering strategy for switching the operating mode of the device.
Flow-sensor-based humidification with temperature sensor and heating element
Humidification components configured for humidifying a gas flow delivered to the patient and a flow sensor configured for measuring a flow rate of the gas flow, the humidification components comprise a temperature sensor and a heating element connected to the temperature sensor, and the temperature sensor is configured to measure a temperature of the heating element while the device is operating in the first operating mode or the second operating mode, and the temperature of the heating element is adjustable based on the flow rate.
Coefficient-based heating element temperature adjustment formula
Adjusting the temperature of the heating element to a first temperature value by the formula in which Theating element(t) depends on Q(t) with coefficients an, an-1, an-2, ..., a1, a0 and a positive integer n, wherein the coefficients of the formula are obtained by fitting experimental data of a series of experiments and are pre-stored in the memory.
Method steps for obtaining ROX and triggering switching between operating modes
A method comprising obtaining a Respiratory Rate-Oxygenation (ROX) index based on first parameters; and triggering mode switching of the device according to the ROX index and a preset triggering strategy for switching the operating mode of the device, wherein the at least two operating modes comprise a first operating mode for providing high-flow nasal cannula (HFNC) support and a second operating mode for providing non-invasive ventilation (NIV) support or invasive ventilation (INV) support.
Method steps for humidifying gas and adjusting heating element temperature from flow rate using the formula
Humidifying, by the humidification components, a gas flow delivered to the patient; measuring, by the flow sensor, a flow rate of the gas flow; measuring, by the temperature sensor, a temperature of the heating element when the device is operating in the first operating mode or the second operating mode; and adjusting the temperature of the heating element based on the flow rate, wherein adjusting the temperature is performed by the formula with coefficients an, an-1, ..., a0, and wherein the coefficients are obtained by fitting experimental data and pre-stored in the memory.
Overall, the independent claims focus on a device and corresponding method that switch between HFNC and NIV/INV operating modes based on a ROX index and a preset triggering strategy, while also providing humidification using a temperature sensor and heating element whose temperature is adjusted based on measured gas flow rate using a coefficient-based formula with coefficients obtained from fitting experimental data and pre-stored in memory.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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