System, method, and computer program product for controlling a fluid injection system based on hydraulic resistance

Patent metadata

Field	Value
Publication number	US-2023181816-A1
Application number	US-202117998338-A
Country	US
Kind code	A1
Filing date	Jun 1, 2021
Priority date	Jun 2, 2020
Publication date	Jun 15, 2023
Grant date	—

Abstract

A system for controlling a fluid injection system is disclosed. The system includes at least one processor programmed or configured to determine at least one characteristic of a power injection protocol, where the at least one characteristic of the power injection protocol is associated with a medical fluid involved in the power injection protocol, determine an estimated value of viscosity of the medical fluid based on the at least one characteristic of the power injection protocol, calculate a hydraulic resistance score based on the estimated value of viscosity of the medical fluid, and determine one or more motor controller gains of a motor of a powered fluid injector in the power injection protocol based on the hydraulic resistance score.

First claim

1 . A method for controlling a fluid injection system, comprising:
determining, with at least one processor, at least one characteristic of a power injection protocol, wherein the at least one characteristic of the power injection protocol is associated with a medical fluid involved in the power injection protocol; determining, with the at least one processor, an estimated value of viscosity of the medical fluid based on the at least one characteristic of the power injection protocol; calculating, with the at least one processor, a hydraulic resistance score based on the estimated value of viscosity of the medical fluid; and determining, with the at least one processor, one or more motor controller gains of a motor of a powered fluid injector in the power injection protocol based on the hydraulic resistance score.

2 . The method of claim 1 , wherein determining the at least one characteristic of the power injection protocol comprises:
determining a steady state characteristic of saline flowing through an orifice of a fluid path of the powered fluid injector; determining a steady state characteristic of a contrast flowing through the orifice; and calculating a characteristic ratio, wherein the characteristic ratio is a ratio of the steady state characteristic of saline to the steady state characteristic of the contrast, wherein determining the estimated value of viscosity of the medical fluid comprises:
determining an estimated value of viscosity of the contrast based on the characteristic ratio, and
wherein calculating the hydraulic resistance score comprises:
calculating the hydraulic resistance score based on the estimated value of viscosity of the contrast.

3 . (canceled)

4 . (canceled)

5 . The method of claim 2 , further comprising determining whether the characteristic ratio satisfies a threshold value, and
wherein calculating the hydraulic resistance score comprises calculating the hydraulic resistance score based on determining that the characteristic ratio satisfies the threshold value.

6 . (canceled)

7 . The method of claim 2 , wherein the steady state characteristic of saline flowing through the orifice comprises a steady state flow rate of saline flowing through the orifice based on a constant pressure of saline,
wherein the steady state characteristic of the contrast flowing through the orifice comprises a steady state flow rate of the contrast flowing through the orifice based on a constant pressure of the contrast, wherein the characteristic ratio comprises a flow rate ratio, wherein the flow rate ratio is a ratio of the steady state flow rate of saline to the steady state flow rate of the contrast, and wherein calculating the characteristic ratio comprises calculating the flow rate ratio based on the steady state flow rate of saline and the steady state flow rate of the contrast.

8 . The method of claim 2 , wherein the steady state characteristic of saline flowing through the orifice comprises a steady state pressure of saline flowing through the orifice based on a constant flow rate of saline,
wherein the steady state characteristic of the contrast flowing through the orifice comprises a steady state pressure of the contrast flowing through the orifice based on a constant flow rate of the contrast, wherein the characteristic ratio comprises a pressure ratio, wherein the pressure ratio is a ratio of the steady state pressure of saline to the steady state pressure of the contrast, and wherein calculating the characteristic ratio comprises calculating the pressure ratio based on the steady state pressure of saline and the steady state pressure of the contrast.

9 . The method of claim 1 , further comprising determining a value of hydraulic capacitance of the medical fluid involved in the power injection protocol,
wherein determining the one or more motor controller gains comprises determining the motor controller gains based on the value of hydraulic capacitance of the medical fluid involved in the power injection protocol.

10 . The method of claim 1 , wherein determining the at least one characteristic of the power injection protocol comprises:
determining a first pressure of the power injection protocol when the power injection protocol is in a vacuum fill state, wherein when the power injection protocol is in the vacuum fill state, the power injection protocol is closed off from receiving the medical fluid in a fluid reservoir; determining a second pressure of the power injection protocol when the power injection protocol is in a normal fill state, wherein when the power injection protocol is in the normal fill state, the power injection protocol is open to receiving medical fluid in the fluid reservoir; and calculating a difference in pressure of the power injection protocol between the vacuum fill state and the normal fill state based on the first pressure of the power injection protocol and the second pressure of the power injection protocol, wherein determining the estimated value of viscosity of the medical fluid comprises determining the estimated value of viscosity of the medical fluid based on the difference in pressure of the power injection protocol between the vacuum fill state and the normal fill state.

11 . (canceled)

12 . (canceled)

13 . The method of claim 1 , wherein determining the at least one characteristic of the power injection protocol comprises:
determining a force exerted on a force component of a pump during each fill operation of a fluid reservoir of a plurality of fill operations of the fluid reservoir, wherein each fill operation of the fluid reservoir comprises an operation performed to fill the fluid reservoir with a medical fluid; and determining a fill flow rate of the medical fluid through an orifice during each fill operation of the plurality of fill operations of the fluid reservoir, wherein determining the estimated value of viscosity of the medical fluid comprises determining the estimated value of viscosity of the medical fluid based on the force exerted on the force component of the pump during each fill operation of the plurality of fill operations of the fluid reservoir and the fill flow rate through the orifice during each fill operation of the plurality of fill operations of the fluid reservoir.

14 . (canceled)

15 . (canceled)

16 . The method of claim 1 , wherein determining the at least one characteristic of the power injection protocol comprises:
controlling a force component of a pump of the powered fluid injector to perform an operation to fill a fluid path; and determining a fill time for the fluid path, wherein the fill time for the fluid path comprises an amount of time during which a volume of the fluid path is being filled with the medical fluid, wherein determining the estimated value of viscosity of the medical fluid comprises determining the estimated value of viscosity of the medical fluid based on the fill time for the fluid path.

17 . (canceled)

18 . The method of claim 1 , wherein determining the at least one characteristic of the power injection protocol comprises:
controlling a force component of a pump of the powered fluid injector to provide fluid flow of the medical fluid in a lumen of a tube component of the fluid injection system; controlling the force component of the pump of the powered fluid injector to alter at least one condition of fluid flow of the medical fluid in the lumen of the tube component; and detecting a characteristic associated with altering the at least one condition of fluid flow of the medical fluid

Assignees

• Bayer Healthcare Llc

Inventors

• Lee Randy
• Delbrugge Gerald
• Spohn Michael
• Scutt Christopher
• Mcguire Matthew
• Shinde Abhishek
• Naples Andrew
• Mcdermott Michael
• Uber Iii Arthur

Classifications

• A61M2205/332

  Force measuring means · CPC title

• A61M5/007 Primary

  for contrast media · CPC title

• G16H20/40

  relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture · CPC title

• A61M5/16827

  controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths (infusion of multiple fluids without using a controller A61M5/1407) · CPC title

• A61M5/14546

  Front-loading type injectors · CPC title