| abstract |
The invention discloses a catheter for use in a breathing apparatus. Provided is a method of heating breathable gas in a conduit of a breathing apparatus configured to deliver the breathable gas through the conduit, the method comprising: delivering humidified breathable gas through the conduit a flow of gas; heating the conduit by supplying DC current to a plurality of wires supported by the conduit at a predetermined duty cycle; sensing a temperature in the conduit during an OFF period of the predetermined duty cycle; and The DC current is controlled to maintain the temperature in the conduit at a selected temperature. The present invention also discloses a breathing device for delivering breathable gas to a patient, a humidifier for the breathing device, and a method of activating the breathing device. |