Humidification breathing apparatus control
AssigneeFisher & Paykel Healthcare Limited
InventorsAlastair Edwin Mcauley, Igor Olegovich Yatsevich, Nimansha Budhiraja, Dongxue You
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Abstract
A humidification breathing apparatus for generating and delivering humidified air to a patient at a desired humidity proximate the patient, the apparatus comprising an air flow path and a controller for controlling operation of the humidification breathing apparatus, wherein the controller is configured to operate the humidification breathing apparatus to control humidity at a point in the flow path to achieve the desired delivered humidity proximate the patient based on the patient exhaled humidity and flow.
Claims13
A humidification breathing apparatus for generating and delivering humidified air to a patient at a delivered temperature proximate the patient comprising:
- an air flow path, and
- a controller for controlling operation of the humidification breathing apparatus, wherein the controller is configured to operate the humidification breathing apparatus to control temperature at a target point in the air flow path to a target temperature to achieve a delivered temperature at a downstream patient delivery point in the air flow path proximate the patient, wherein the controller utilizes a model of the contributions to heat balance downstream of the target point to predict the target temperature that achieves the delivered temperature at the downstream patient delivery point, the contributions to heat balance including at least the patient exhaled temperature and flow, wherein the controller adjusts the temperature at the target point based on the predicted target temperature, wherein patient exhaled temperature comprises a predetermined value.
Dependencies are inferred from the claim text.