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1. (WO2018016977) SENSING FOR RESPIRATORY CIRCUITS

Pub. No.:    WO/2018/016977    International Application No.:    PCT/NZ2017/050101
Publication Date: Fri Jan 26 00:59:59 CET 2018 International Filing Date: Tue Jul 25 01:59:59 CEST 2017
IPC: A61M 16/00
Applicants: FISHER & PAYKEL HEALTHCARE LIMITED
Inventors: PETROCHENKO, Anton
YAN, Chenjie
TONKIN, Paul James
LIU, Po-Yen
JAVED, Salman Mansoor
SEEKUP, Peter Alan
Title: SENSING FOR RESPIRATORY CIRCUITS
Abstract:
Some embodiments provide a breathing assistance apparatus comprising a conduit for conveying gases therein, the conduit comprising circuitry. The circuitry may comprise 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. There is also provided a controller to control provision of AC power or AC voltage to the heater wire part; and control selective reading of the sensor. The controller may be configured to read the sensor at or about a particular portion of the AC power waveform provided to the heater wire part.