Method and apparatus for humidification of breathable gas with profiled delivery

摘要

A method and apparatus for delivering breathable gas to a user includes a humidifying unit that is controllable to humidify the gas in accordance with a variable humidity profile such that the gas is delivered to the user at variable humidity levels, e.g., during a treatment session.

主权项

1. A humidifying system configured to humidify pressurized breathable gas, the humidifying system comprising:
a housing configured to couple to a blower that is adapted to supply pressurized breathable gas to provide continuous positive airway pressure (CPAP) treatment to a patient; a tub adapted to hold a volume of water; a heater element to heat the volume of water; a temperature sensor to sense the ambient temperature; and a controller, wherein the controller is configured to control the heater element to provide a humidity profile during a treatment session, and a set point of the humidity profile is modified over at least a portion of the treatment session to maintain efficient use of the volume of water throughout the treatment session, wherein the set point of the humidity profile is modified as a function of the sensed ambient temperature and a measure of time.