US 11,771,824 B2
Force sensing resistor for liquid low-volume detection and occlusion sensing and methods and apparatuses for flow sensing along fluid path in fluid delivery device
Alessandro Pizzochero, Chelmsford, MA (US); J. Richard Gyory, Sudbury, MA (US); and Joseph Iskandar, Brighton, MA (US)
Assigned to Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Filed by Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Filed on Aug. 20, 2021, as Appl. No. 17/408,180.
Application 17/408,180 is a continuation of application No. 15/529,135, previously published as PCT/US2015/064028, filed on Dec. 4, 2015.
Claims priority of provisional application 62/087,775, filed on Dec. 4, 2014.
Prior Publication US 2021/0379281 A1, Dec. 9, 2021
Int. Cl. G01L 9/00 (2006.01); A61M 5/168 (2006.01); A61M 5/142 (2006.01); G01L 9/02 (2006.01); G01F 1/696 (2006.01); G01L 1/20 (2006.01)
CPC A61M 5/16854 (2013.01) [A61M 5/14248 (2013.01); A61M 5/16831 (2013.01); G01F 1/696 (2013.01); G01L 1/20 (2013.01); G01L 9/02 (2013.01); A61M 2005/16863 (2013.01); A61M 2205/332 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3386 (2013.01); A61M 2205/50 (2013.01); A61M 2205/502 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A fluid delivery system comprising:
a fluid reservoir;
a pump that controls the flow of fluid from the fluid reservoir to a patient via a fluid path;
a sensor located along the fluid path to detect fluid flow or pressure, the fluid path having a cavity adjacent a portion of the fluid path such that the fluid path is exposed within the cavity; and
a processor configured to control the pump to deliver the fluid to the patient and to receive sensor data from the sensor;
wherein the sensor comprises a protrusion on a sensor enclosure, the protrusion is configured to extend away from the sensor enclosure and into the cavity, and the cavity is dimensioned such that an exterior distal end of the protrusion is within the cavity and volume of the fluid in the cavity is minimized when the exterior distal end of the protrusion is disposed within the cavity, and
wherein, when the protrusion is disposed within the cavity, the protrusion is exposed to the fluid in the fluid path to allow contact between the fluid and the sensor to detect the fluid flow or pressure, the sensor enclosure having electronics for generating sensor data corresponding to the detected fluid flow or pressure, the electronics configured to be connected to the processor to provide the sensor data to the processor.