US 11,730,913 B2
Apparatus for supplying gases to a patient
Dean Antony Barker, Auckland (NZ); Kevin Peter O'Donnell, Auckland (NZ); Martin Paul Friedrich Kramer, Auckland (NZ); Stanislav Tatkov, Auckland (NZ); and Therese Clark, Auckland (NZ)
Assigned to FISHER & PAYKEL HEALTHCARE LIMITED, Auckland (NZ)
Filed by FISHER & PAYKEL HEALTHCARE LIMITED, Auckland (NZ)
Filed on Jul. 8, 2020, as Appl. No. 16/924,071.
Application 16/924,071 is a continuation of application No. 15/436,479, filed on Feb. 17, 2017, granted, now 10,744,294.
Application 15/436,479 is a continuation of application No. 13/643,763, granted, now 9,572,951, previously published as PCT/NZ2011/000059, filed on Apr. 27, 2011.
Claims priority of provisional application 61/328,521, filed on Apr. 27, 2010.
Prior Publication US 2020/0405996 A1, Dec. 31, 2020
Int. Cl. A61M 16/16 (2006.01); A61M 16/12 (2006.01); A61M 16/10 (2006.01); A61M 16/00 (2006.01); A61M 16/06 (2006.01)
CPC A61M 16/161 (2014.02) [A61M 16/0066 (2013.01); A61M 16/024 (2017.08); A61M 16/06 (2013.01); A61M 16/109 (2014.02); A61M 16/1095 (2014.02); A61M 16/12 (2013.01); A61M 16/127 (2014.02); A61M 16/16 (2013.01); A61M 16/162 (2013.01); A61M 2016/003 (2013.01); A61M 2016/0021 (2013.01); A61M 2016/0039 (2013.01); A61M 2016/1025 (2013.01); A61M 2202/0208 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3386 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An apparatus configured to supply humidified gases to a patient, the apparatus comprising:
a humidified gases supply,
a gases supply passage positioned within a housing of the apparatus, the gases supply passage configured to be downstream of the humidified gases supply and upstream of the patient in use, the gases supply passage comprising a wall,
a first temperature sensor located on an outside of the wall of the gases supply passage or embedded in the wall of the gases supply passage,
a second temperature sensor provided at a location adjacent the first temperature sensor, the second temperature sensor being located with the wall of the gases supply passage between the second temperature sensor and a gases flow in the gases supply passage, and
a controller receiving output of the first and second temperature sensors and adapted to derive from the output of the first and second temperature sensors an estimation of a property of gases flowing through the gases supply passage.