System and method for improved fluid delivery in multi-fluid injector systems

Patent metadata

Field	Value
Publication number	US-2023347043-A1
Application number	US-202318208021-A
Country	US
Kind code	A1
Filing date	Jun 9, 2023
Priority date	Mar 3, 2016
Publication date	Nov 2, 2023
Grant date	—

Abstract

A method of maintaining an overall flow rate during a sequential delivery of at least two fluids to a patient’s blood vessel includes delivering at least a first fluid into the patient’s blood vessel at a first flow rate, delivering at least a second fluid into the patient’s blood vessel at a second flow rate, and adjusting at least one of a first flow profile of the first flow rate and a second flow profile of the second flow rate to dampen a transient increase in the overall flow rate during a transition between delivering one of the first fluid and the second fluid to delivering the other of the first fluid and the second fluid.

First claim

What is claimed is:

1 . A method of maintaining an overall flow rate during a sequential delivery of at least two fluids to a patient’s blood vessel, the method comprising:
delivering at least a first fluid into the patient’s blood vessel at a first flow rate;
delivering at least a second fluid into the patient’s blood vessel at a second flow rate, wherein the second fluid is less viscous than the first fluid; and
adjusting at least one of a first flow profile of the first flow rate and a second flow profile of the second flow rate to dampen a transient increase in the overall flow rate during a transition between delivering one of the first fluid and the second fluid to delivering the other of the first fluid and the second fluid.

2 . The method of claim 1 , wherein adjusting at least one of the first flow profile of the first flow rate and a second flow profile of the second flow rate comprises delaying the delivery of one of the first fluid and the second fluid until the other of the first fluid and the second fluid reaches a predetermined flow rate.

3 . The method of claim 1 , wherein adjusting at least one of the first flow profile of the first flow rate and a second flow profile of the second flow rate comprises adjusting one of the first flow rate and the second flow rate using a controller wherein the adjusting is based on the other of the first flow rate and the second flow rate.

4 . The method of claim 1 , wherein adjusting at least one of the first flow profile of the first flow rate and a second flow profile of the second flow rate comprises pulling back a plunger of a second fluid syringe containing the second fluid to reduce a capacitance volume of the second fluid syringe.

5 . The method of claim 4 , wherein pulling back the plunger of the second fluid syringe comprises pulling back the plunger a distance equal to the capacitance volume of the second fluid syringe.

6 . The method of claim 4 , wherein the pulling back of the plunger is controlled by a controller.

7 . The method of claim 6 , wherein the pulling back of the plunger by the controller is based on information based on one or more of fluid viscosities, catheter size, capacitance of the second fluid syringe and a volume of fluid in a fluid injection system.

8 . A multi-fluid injection system configured to maintain an overall flow rate during a sequential delivery of at least two fluids to a patient’s blood vessel, the system comprising:
a processor configured to control the multi-fluid injection system to:
deliver at least a first fluid into the patient’s blood vessel at a first flow rate;
deliver at least a second fluid into the patient’s blood vessel at a second flow rate wherein the second fluid is less viscous than the first fluid; and
adjust at least one of a first flow profile of the first flow rate and a second flow profile of the second flow rate to dampen a transient increase in the overall flow rate during a transition between delivering one of the first fluid and the second fluid to delivering the other of the first fluid and the second fluid.

9 . The multi-fluid injection system of claim 8 , wherein the processor is further configured to control the multi-fluid injection system to increase a transition time between delivering one of the first fluid and the second fluid and delivering the other of the first fluid and the second fluid.

10 . The multi-fluid injection system of claim 8 , wherein the processor is further configured to control the multi-fluid injection system to delay the delivery of one of the first fluid and the second fluid until the other of the first fluid and the second fluid reaches a predetermined flow rate.

11 . The multi-fluid injection system as claimed in claim 17 , wherein the controller adjusts at least one of the first flow profile of the first flow rate and a second flow profile of the second flow rate comprises the controller pulling back a plunger of a second fluid syringe containing the second fluid to reduce a capacitance volume of the second fluid syringe.

12 . A method of maintaining an overall flow rate during a sequential delivery of at least two fluids to a patient’s blood vessel, the method comprising:
delivering at least a first fluid into the patient’s blood vessel at a first flow rate, wherein the first fluid is less viscous than the second fluid;
delivering at least a second fluid into the patient’s blood vessel at a second flow rate; and
adjusting at least one of a first flow profile of the first flow rate and a second flow profile of the second flow rate to dampen a transient increase in the overall flow rate during a transition between delivering one of the first fluid and the second fluid to delivering the other of the first fluid and the second fluid.

13 . The method of claim 12 , wherein adjusting at least one of the first flow profile of the first flow rate and a second flow profile of the second flow rate comprises delaying the delivery of one of the first fluid and the second fluid until the other of the first fluid and the second fluid reaches a predetermined flow rate.

14 . The method of claim 12 , wherein adjusting at least one of the first flow profile of the first flow rate and a second flow profile of the second flow rate comprises adjusting one of the first flow rate and the second flow rate using a controller wherein the adjusting is based on the other of the first flow rate and the second flow rate.

15 . The method of claim 12 , wherein adjusting at least one of the first flow profile of the first flow rate and a second flow profile of the second flow rate comprises pulling back a plunger of a second fluid syringe containing the second fluid to reduce a capacitance volume of the second fluid syringe.

16 . The method of claim 15 , wherein pulling back the plunger of the second fluid syringe comprises pulling back the plunger a distance equal to the capacitance volume of the second fluid syringe.

17 . The method of claim 15 , wherein the pulling back of the plunger is controlled by a controller.

18 . The method of claim 17 , wherein the pulling back of the plunger by the controller is based on information based on one or more of fluid viscosities, catheter size, capacitance of the second fluid syringe and a volume of fluid in a fluid injection system.

Assignees

• Bayer Healthcare Llc

Inventors

• Spohn Michael
• Schriver Ralph
• Uber Iii Arthur
• Heller Ronald
• Cowan Kevin
• Tucker Barry
• Rhinehart Edward
• Newing Timothy

Classifications

• A61M5/1408 Primary

  in parallel, e.g. manifolds, sequencing valves (access sites A61M39/02; tube connectors A61M39/10) · CPC title

• A61M5/007

  for contrast media · CPC title

• A61M5/14546 Primary

  Front-loading type injectors · CPC title

• A61M5/14566

  with a replaceable reservoir for receiving a piston rod of the pump · CPC title

• A61M2005/14208

  with a programmable infusion control system, characterised by the infusion program · CPC title