US 12,337,117 B2
Water out alarm determination
Po-Yen Liu, Auckland (NZ); Ivan Chih-Fan Teng, Auckland (NZ); Stefan Leo Van Workum, Auckland (NZ); Oliver Samuel Steiner, Auckland (NZ); and Anthony James Newland, Auckland (NZ)
Assigned to Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed on Jul. 28, 2022, as Appl. No. 17/815,873.
Application 17/815,873 is a continuation of application No. 16/319,798, granted, now 11,433,196, previously published as PCT/NZ2017/050096, filed on Jul. 19, 2017.
Claims priority of provisional application 62/364,250, filed on Jul. 19, 2016.
Prior Publication US 2023/0016953 A1, Jan. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 16/16 (2006.01); A61M 16/00 (2006.01); A61M 16/06 (2006.01); A61M 16/10 (2006.01); G08B 3/10 (2006.01); G08B 5/36 (2006.01); G08B 21/18 (2006.01); G08B 23/00 (2006.01)
CPC A61M 16/16 (2013.01) [A61M 16/0051 (2013.01); A61M 16/0069 (2014.02); A61M 16/024 (2017.08); A61M 16/0666 (2013.01); A61M 16/109 (2014.02); A61M 16/1095 (2014.02); G08B 3/10 (2013.01); G08B 5/36 (2013.01); G08B 21/182 (2013.01); G08B 23/00 (2013.01); A61M 2016/0033 (2013.01); A61M 2016/0039 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3386 (2013.01); A61M 2205/3389 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of determining a water out condition for a respiratory assistance system, wherein a controller of the respiratory assistance system is configured with computer-executable instructions to perform the method, the method comprising:
operating the respiratory assistance system in a selected therapy mode;
receiving data relating to the operation of the selected therapy mode;
receiving a flow data;
determining an operational state based on at least one of a temperature of a heater, a temperature at an outlet of a humidification chamber, the selected therapy mode or a flow rate of gases;
selecting a water out detection method from a plurality of independently selectable water out detection methods based on the operational state, wherein the plurality of water out detection methods comprise a passive water out detection method and an active water out detection method; and
operating the respiratory assistance system with the selected water out detection method.