US 12,263,303 B2
Systems and methods of detecting incorrect connections in a humidification system
Ivan Chih-Fan Teng, Auckland (NZ); Po-Yen Liu, Auckland (NZ); Ho Shing Lo, Auckland (NZ); Oliver Samuel Steiner, Auckland (NZ); and Peter Alan Seekup, Auckland (NZ)
Assigned to Fisher & Paykel Healthcare Limited, Auckland (NZ)
Appl. No. 17/593,928
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
PCT Filed Mar. 27, 2020, PCT No. PCT/NZ2020/050029
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2020/204731, PCT Pub. Date Oct. 8, 2020.
Claims priority of provisional application 62/826,801, filed on Mar. 29, 2019.
Prior Publication US 2022/0160977 A1, May 26, 2022
Int. Cl. A61M 16/08 (2006.01); A61M 16/00 (2006.01); A61M 16/06 (2006.01); A61M 16/10 (2006.01); A61M 16/16 (2006.01); A61M 16/20 (2006.01)
CPC A61M 16/0051 (2013.01) [A61M 16/0003 (2014.02); A61M 16/0666 (2013.01); A61M 16/0833 (2014.02); A61M 16/0875 (2013.01); A61M 16/0883 (2014.02); A61M 16/1085 (2014.02); A61M 16/109 (2014.02); A61M 16/161 (2014.02); A61M 16/202 (2014.02); A61M 16/208 (2013.01); A61M 2016/0027 (2013.01); A61M 2016/003 (2013.01); A61M 2205/14 (2013.01); A61M 2205/3306 (2013.01); A61M 2205/3334 (2013.01); A61M 2205/3348 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3375 (2013.01); A61M 2205/3389 (2013.01); A61M 2205/505 (2013.01); A61M 2205/584 (2013.01); A61M 2205/6027 (2013.01); A61M 2205/6072 (2013.01); A61M 2205/6081 (2013.01); A61M 2205/702 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of detecting reverse flow condition in a respiratory humidification system comprising a controller, a gases source, a humidifier, and a breathing circuit, the humidifier comprising a base comprising a heater plate and a humidification chamber that carries humidification fluid, the humidification chamber positionable on the base, the breathing circuit comprising an inspiratory conduit, an expiratory conduit, and a dryline, the method comprising:
introducing a flow of gas into a humidification chamber inlet;
directing the flow of gas via a flow guide coupled to the inlet towards a focused region of a surface of the humidification fluid;
detecting a change in the surface of the humidification fluid; and
outputting an indication of reverse flow condition based on the detected change in the surface of the humidification fluid.