US 12,263,326 B2
Methods and systems for verifying the contents of a syringe used for medical fluid delivery
Arthur Uber, III, Pittsburgh, PA (US); Michael Spohn, Fenelton, PA (US); David Griffiths, Pittsburgh, PA (US); and Ralph Schriver, Tarentum, PA (US)
Assigned to BAYER HEALTHCARE LLC, Whippany, NJ (US)
Appl. No. 16/349,314
Filed by BAYER HEALTHCARE LLC, Whippany, NJ (US)
PCT Filed Nov. 13, 2017, PCT No. PCT/US2017/061268
§ 371(c)(1), (2) Date May 13, 2019,
PCT Pub. No. WO2018/089882, PCT Pub. Date May 17, 2018.
Claims priority of provisional application 62/421,661, filed on Nov. 14, 2016.
Prior Publication US 2020/0230317 A1, Jul. 23, 2020
Int. Cl. A61M 5/168 (2006.01); A61M 5/00 (2006.01); G16H 20/17 (2018.01)
CPC A61M 5/16854 (2013.01) [A61M 5/007 (2013.01); G16H 20/17 (2018.01); A61M 2205/18 (2013.01); A61M 2205/332 (2013.01); A61M 2205/52 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A fluid delivery system, comprising:
a syringe;
a fluid injector comprising a drive shaft for drawing fluid into and dispensing fluid from the syringe;
one or more strain sensors adapted to measure a force applied by the drive shaft to draw the fluid into the syringe;
a processor in communication with the one or more strain sensors; and
a non-transitory, computer-readable storage medium in operable communication with the processor,
wherein the computer-readable storage medium contains one or more programming instructions that, when executed, cause the processor to receive from the one or more strain sensors one or more measurements of the force applied by the drive shaft to draw the fluid into the syringe during an onset period and after a steady state for the force applied to the drive shaft is reached and determine from the one or more measurements of the force applied by the drive shaft to draw the fluid into the syringe whether air is present in the syringe by a slope of a force applied by the drive shaft compared to a time for the onset period and whether a correct fluid is being drawn into the syringe by comparison with a predetermined steady state force value P for the correct fluid.