CPC A61M 16/1045 (2013.01) [A61M 16/0066 (2013.01); A61M 16/024 (2017.08); A61M 16/161 (2014.02); A61M 16/0003 (2014.02); A61M 16/0816 (2013.01); A61M 16/0875 (2013.01); A61M 2205/33 (2013.01); H05B 1/025 (2013.01)] | 17 Claims |
1. A controller for a breathing assistance apparatus, the breathing assistance apparatus comprising a conduit for conveying gases therein, the conduit comprising circuitry, the circuitry comprising at least one heater wire part to heat gases in the conduit, in use, and at least one sensor wire part comprising at least one sensor for monitoring a parameter of the gases in the conduit, in use, the controller being configured to:
control provision of AC power to the heater wire part; and
control selective reading of the at least one sensor,
wherein the controller is configured to read the at least one sensor at or about a particular portion of an AC power waveform provided to the heater wire part.
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