US 11,771,825 B2
Occlusion detection for infusion pumps
Kevin Gregory Carothers, San Diego, CA (US); Richard Stor Wu, San Diego, CA (US); Robert Dwaine Butterfield, Poway, CA (US); and Robert Steven Vasko, San Diego, CA (US)
Assigned to CAREFUSION 303, INC., San Diego, CA (US)
Filed by CareFusion 303, Inc., San Diego, CA (US)
Filed on Sep. 4, 2020, as Appl. No. 17/13,421.
Application 17/013,421 is a continuation of application No. 15/792,226, filed on Oct. 24, 2017, granted, now 10,792,420.
Prior Publication US 2020/0397987 A1, Dec. 24, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/168 (2006.01); G06N 5/04 (2023.01); G01L 7/04 (2006.01); G08B 21/18 (2006.01); G06N 20/00 (2019.01); G16H 40/40 (2018.01); G16H 40/63 (2018.01); G16H 20/17 (2018.01); G16H 50/50 (2018.01)
CPC A61M 5/16859 (2013.01) [G01L 7/04 (2013.01); G06N 5/04 (2013.01); G06N 20/00 (2019.01); G08B 21/182 (2013.01); G16H 20/17 (2018.01); G16H 40/40 (2018.01); G16H 40/63 (2018.01); A61M 2005/16868 (2013.01); A61M 2005/16872 (2013.01); A61M 2205/3553 (2013.01); A61M 2205/3561 (2013.01); A61M 2205/3584 (2013.01); A61M 2205/52 (2013.01); A61M 2205/583 (2013.01); G16H 50/50 (2018.01)] 20 Claims
OG exemplary drawing
 
1. A system configured for detection of a fluid condition in a flexible tube, the system comprising:
a restraining element for receiving the tube;
a sensor coupled to the restraining element and positioned to obtain a value of a tubing force when the tube is received by the restraining element;
a memory storing instructions; and
a processor configured to execute the instructions to:
generate a force-time curve representative of values of the tubing force obtained by the sensor over time;
determine a time-decaying parameter associated with the tubing force characterizing the force-time curve; and
determine a fluid pressure value for a fluid in the tube based at least in part on the time-decaying parameter, a material of the tube, a dimension of the tube, and a use history of the tube.