Breathing aid

Abstract

This relates to the detection of bubbling in respiratory support devices, and / or the estimation of flow and / or pressure in gas pathways. [Solution] A respiratory support device 150 for providing respiratory therapy such as bubble CPAP therapy includes a flow generator 218, a gas flow path 121, a pressure regulator, a gas characteristic sensor, and a controller. The controller of the device 150 can be configured to detect the presence of bubbling in the pressure regulator based on at least one waveform characteristic from the measured flow rate and / or pressure waveform.

Claims

[Claim 1] A respiratory support device for providing respiratory therapy, A flow generator, wherein the flow generator is configured to provide a gas flow to an intake conduit at a target flow rate, At least one gas characteristic sensor, the at least one gas characteristic sensor is configured to measure the flow rate and / or pressure of the gas in a gas flow path, The gas flow path includes at least the inspiratory conduit configured to connect to a patient interface, and the expiratory conduit configured to connect to the patient interface and a pressure regulator, the pressure regulator includes at least one gas characteristic sensor, and the pressure regulator includes a chamber having a column of liquid in which the end of the expiratory conduit is immersed. A controller, wherein the controller is Based on the waveforms of the measured flow rate and / or pressure, at least one waveform characteristic is determined. A respiratory support device, comprising a controller configured to determine whether bubbling is occurring in the pressure regulator based on at least one waveform characteristic.

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