Water out alarm
AssigneeFisher & Paykel Healthcare Limited
InventorsDean Antony Barker, Jack Che-Wei Hsu, Jae Chul Han
Life of this patent
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Abstract
The present invention provides for an improved method of determining a water out condition in a humidified gases supply apparatus. The method includes a two step process including a primary determination of a water out condition and a secondary determination of a water out condition. This primary determination is made during observation of the normal operation of the apparatus. During the secondary determination the method takes temporary control over the humidifying part of the apparatus. The secondary determination confirms or contradicts the primary determination.
Claims21
(canceled)
An apparatus for supplying a high flow of gases to a patient through a nasal cannula and determining a low or no water condition, the apparatus comprising:
- a casing;
- a flow generator comprising a fan to provide a gases flow with a flow rate of 15 L/min to 45 L/min;
- a humidifier with a heater plate;
- an unsealed nasal cannula for the patient;
- and
- a controller,
- wherein the humidifier and the flow generator are integrated in the casing,
- wherein the controller is configured to:
- adjust an output of the flow generator by controlling a fan speed to provide the gases flow;
- monitor a temperature condition during use of the apparatus,
- determine a low or no water condition in a humidifier chamber based on the temperature condition;
- and
- provide an indication of a low or no water condition.
An apparatus for supplying high flow therapy gases to a patient, comprising:
- a casing;
- a flow generator comprising a fan to provide high flow therapy gases comprising flow rates of 15 L/min to 45 L/min;
- a humidifier with a heater plate, wherein the humidifier and the flow generator are integrated in the casing;
- an unsealed nasal cannula for the patient;
- and
- a controller which:
- adjusts an output of the flow generator by controlling a fan speed;
- monitors a temperature condition during use of the apparatus,
- determines a low or no water condition in a humidifier chamber based on the monitored temperature condition;
- provides an output of a possible water out condition;
- and
- sends a signal to a display of the low or no water condition.
A method of providing high flow therapy gases to a patient using a nasal high flow therapy apparatus, comprising:
- providing humidified high flow therapy gases comprising flow rates of 15 L/min to 45 L/min to a nasal cannula of a patient;
- adjusting an output of a flow generator by controlling a fan speed;
- monitoring a temperature condition during use of the apparatus,
- determining a low or no water condition in a humidifier chamber based on the monitored temperature condition;
- providing an output of a possible water out condition;
- and
- sending a signal to a display of the low or no water condition.
Dependencies are inferred from the claim text.