US 11,786,652 B2
System and method for drive member position and fluid injector system mechanical calibration
Michael McDermott, Pittsburgh, PA (US); Chelsea Marsh, Pittsburgh, PA (US); Michael Spohn, Fenelton, PA (US); William Barone, Pittsburgh, PA (US); Shahab Taheri, The Ponds (AU); Han Min Thu, Mandalay (MM); David Coleman, North Parramatta (AU); Jee Hoon Yoo, St. Ermington (AU); and Vince Delbrugge, Indiana, PA (US)
Assigned to BAYER HEALTHCARE LLC, Whippany, NJ (US)
Appl. No. 16/623,828
Filed by BAYER HEALTHCARE LLC, Whippany, NJ (US)
PCT Filed Aug. 28, 2018, PCT No. PCT/US2018/048284
§ 371(c)(1), (2) Date Dec. 18, 2019,
PCT Pub. No. WO2019/046261, PCT Pub. Date Mar. 7, 2019.
Claims priority of provisional application 62/552,589, filed on Aug. 31, 2017.
Claims priority of provisional application 62/552,427, filed on Aug. 31, 2017.
Prior Publication US 2020/0179595 A1, Jun. 11, 2020
Int. Cl. A61M 5/145 (2006.01); A61M 5/14 (2006.01); A61M 5/168 (2006.01); A61M 5/142 (2006.01)
CPC A61M 5/14546 (2013.01) [A61M 5/14566 (2013.01); A61M 5/1408 (2013.01); A61M 5/16827 (2013.01); A61M 5/16881 (2013.01); A61M 2005/14208 (2013.01); A61M 2005/14553 (2013.01); A61M 2205/332 (2013.01); A61M 2205/3306 (2013.01); A61M 2205/3561 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for characterizing and correcting fluid injection system slack, the method comprising:
driving at least one drive member of a fluid injector to a distal end of at least one syringe connected to the fluid injector;
retracting the at least one drive member toward a proximal end of the at least one syringe to draw fluid into the at least one syringe from at least one fluid container in fluid communication with the at least one syringe;
switching at least one valve from a first position where the at least one syringe is in fluid communication with the at least one fluid container to a second position where the at least one syringe is isolated from the at least one fluid container to isolate the at least one syringe from at least one part of the fluid injection system;
measuring and storing a reference position of the at least one drive member within the at least one syringe;
driving the at least one drive member toward the distal end of the at least one syringe until a desired load on the at least one drive member is reached;
measuring and storing a contact position of the at least one drive member within the at least one syringe, wherein the contact position is a position where the desired load is reached; and
deriving a slack correction volume based at least partially on a difference between the reference position and the contact position.
 
5. A method for characterizing and correcting fluid injection system slack, the method comprising:
driving at least one drive member of a fluid injector to a distal end of at least one syringe connected to the fluid injector;
retracting the at least one drive member toward a proximal end of the at least one syringe to draw fluid into the at least one syringe from at least one fluid container in fluid communication with the at least one syringe;
switching at least one valve from a first position where the at least one syringe is in fluid communication with the at least one fluid container to a second position where the at least one syringe is isolated from the at least one fluid container to isolate the at least one syringe from at least one part of the fluid injection system;
driving the at least one drive member toward the distal end of the at least one syringe until a desired load on the at least one drive member is reached;
measuring and storing a contact position of the at least one drive member within the at least one syringe;
relieving pressure from the at least one syringe until a pressure within the at least one syringe is equal to where the at least one drive member has no applied load;
measuring and storing a reference position of the at least one drive member within the at least one syringe where the pressure within the at least one syringe is equal to the pressure applied by the at least one drive member; and
deriving a slack correction volume based at least partially on a difference between the reference position and the contact position.