US 12,220,517 B2
Body temperature measurement devices, methods, and systems
Scott W. Newell, Ipswich, MA (US); Dennis M. Treu, Castle Rock, CO (US); and Jerome James, Vestavia, AL (US)
Assigned to NxStage Medical, Inc., Lawrence, MA (US)
Filed by NxStage Medical, Inc., Lawrence, MA (US)
Filed on May 11, 2023, as Appl. No. 18/195,999.
Application 17/389,963 is a division of application No. 16/387,715, filed on Apr. 18, 2019, granted, now 11,090,424, issued on Aug. 17, 2021.
Application 18/195,999 is a continuation of application No. 17/389,963, filed on Jul. 30, 2021, granted, now 11,684,708.
Application 16/387,715 is a continuation of application No. 15/766,766, granted, now 10,668,206, issued on Jun. 2, 2020, previously published as PCT/US2016/056198, filed on Oct. 8, 2016.
Claims priority of provisional application 62/268,511, filed on Dec. 17, 2015.
Claims priority of provisional application 62/239,838, filed on Oct. 9, 2015.
Prior Publication US 2023/0277745 A1, Sep. 7, 2023
Int. Cl. A61M 1/36 (2006.01); G05D 23/19 (2006.01)
CPC A61M 1/367 (2013.01) [A61M 1/36 (2013.01); A61M 1/3623 (2022.05); G05D 23/1928 (2013.01); A61M 2205/3372 (2013.01); A61M 2230/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of detecting a fever in a patient undergoing extracorporeal blood processing, comprising:
controlling, using an automatic controller, a rate of flow of blood through a flow channel connecting the patient to a temperature sensor, to establish a first flow rate;
at the first flow rate, permitting the flow of an unknown quantity of heat to or from the flow channel connecting the patient to the temperature sensor;
at the first flow rate, measuring at least one temperature of the flow channel using the temperature sensor;
recording first temperature data responsively to said measuring;
controlling, using the automatic controller, the rate of the flow of the blood through the flow channel to establish a second flow rate, different from the first flow rate;
repeating the permitting and measuring at the second flow rate and recording a second temperature data responsively to the corresponding measuring;
calculating an inferred temperature from the first temperature data and the second temperature data, the inferred temperature representing a temperature remote from the temperature sensor; and
comparing the inferred temperature to data responsive to at least one reference temperature and outputting the data to a user interface indicating the data responsive to a result of said comparing.