System and method for fluid delivery using pressure-based motor control for fluid injector devices

Patent metadata

Field	Value
Publication number	US-2024408301-A1
Application number	US-202418813904-A
Country	US
Kind code	A1
Filing date	Aug 23, 2024
Priority date	Nov 21, 2019
Publication date	Dec 12, 2024
Grant date	—

Abstract

A system, method, and computer program product are disclosed for a flow rate algorithm that utilizes changes in fluid pressure over a set time interval to calculate a true flow rate compared to a programmed flow rate, determine any over-delivery or under-delivery in the amount of fluid delivered over the set time interval, compensate for any determined over-delivery or under-delivery in the fluid flow rate over a subsequent set time interval, and repeat the flow rate algorithm for a series of subsequent set time intervals over the duration of a fluid injection procedure.

First claim

The invention claimed is:

1 . A computer program product for controlling operation of a fluid injector system configured for use in administering at least one fluid to a patient, the computer program product comprising at least one non-transitory computer-readable medium comprising one or more instructions that, when executed by at least one processor, cause the at least one processor to:
determine an actual flow rate for the fluid during a specified time interval of a fluid delivery procedure based on a change in pressure generated by at least one drive component of the fluid injector during the fluid delivery procedure and measured by at least one sensor over the specified time interval; determine, with a control device operatively associated with the at least one drive component of the fluid injector, a deviation of the actual flow rate from the programmed flow rate over the specified time interval; and calculate, with the control device, a new programmed flow rate for a subsequent time interval after the specified time interval based on the programmed flow rate and the deviation of the actual flow rate from the programmed flow rate over the specified time interval.

2 . The computer program product of claim 1 , further comprising one or more instructions that, when executed by the at least one processor, cause the at least one processor to compare, with the control device, a maximum allowable deviation to the deviation of the actual flow rate from the programmed flow rate over the specified time interval to determine a flow rate correction, and calculate, with the control device, the new programmed flow rate for the subsequent time interval after the specified time interval based on the programmed flow rate and the flow rate correction.

3 . The computer program product of claim 2 , wherein the deviation of the actual flow rate from the programmed flow rate is limited by predetermined bounds.

4 . The computer program product of claim 2 , wherein the flow rate correction is equal to the maximum allowable deviation if the deviation of the actual flow rate from the programmed flow rate is greater than the maximum allowable deviation.

5 . The computer program product of claim 4 , wherein a difference between the deviation of the actual flow rate from the programmed flow rate and the maximum allowable deviation is stored as a buffer deviation for use in determining a new flow rate correction in one or more subsequent time intervals after the second time interval.

6 . The computer program product of claim 2 , wherein the flow rate correction is equal to the actual flow rate if the deviation of the actual flow rate from the programmed flow rate is less than or equal to the maximum allowable deviation.

7 . The computer program product of claim 1 , wherein the control device is configured to use a machine learning model designed to receive, as an input, data associated with the fluid injection procedure, and provide, as an output, instructions to drive the one or more drive components to deliver a desired volume of fluid at the programmed flow rate.

8 . The computer program product of claim 1 , wherein determining the actual flow rate during the specified time interval comprises measuring a first pressure using the at least one sensor at a beginning of the specified time interval and measuring a second pressure using the at least one sensor at an end of the specified time interval and converting the first pressure and the second pressure to a change in pressure corresponding to the actual flow rate during the specified time interval.

9 . The computer program product of claim 8 , wherein the change in pressure is based on a difference between the second pressure and the first pressure, and at least one scaling factor that is determined by one or more features of the fluid injector.

10 . The computer program product of claim 1 , wherein the at least one sensor is a force sensor configured for measuring a force output of the at least one drive component.

11 . The computer program product of claim 1 , wherein the at least one sensor is a pressure sensor associated with a fluid reservoir or a fluid path component of the fluid injector.

12 . The computer program product of claim 2 , wherein the flow rate correction for each subsequent time interval is based on a difference between the maximum allowable deviation and the deviation of the actual flow rate from the new programmed flow rate over each subsequent time interval, and a buffer deviation from at least one previous time interval.

13 . The computer program product of claim 1 , further comprising repeating the method steps for each subsequent time interval in the fluid injection procedure, wherein the new programmed flow rate is used as the programmed flow rate.

14 . The computer program product of claim 1 , further comprising delivering the fluid at the new programmed flow rate in the subsequent time interval.

15 . A fluid injector system configured for use in administering at least one fluid to a patient, the fluid injector system comprising:
a control device operatively associated with the at least one drive component of the fluid injector, the control device including at least one processor programmed or configured to perform an operation comprising:
determining an actual flow rate during a specified time interval of the fluid delivery procedure based on a change in pressure measured by at least one sensor of a fluid injector of the fluid injector system over the specified time interval, wherein the pressure is generated by at least one drive component of the fluid injector;
determining a deviation of the actual flow rate from the programmed flow rate over the specified time interval;
calculating a new programmed flow rate for a subsequent time interval after the specified time interval based on the programmed flow rate and the deviation of the actual flow rate from the programmed flow rate over the specified time interval;
repeating the determining and calculating steps for each subsequent time interval in the fluid injection procedure, wherein the new programmed flow rate is used as the programmed flow rate; and
delivering the fluid at the new programmed flow rate in the subsequent time interval.

16 . The fluid injector system of claim 15 , wherein the control device including the at least one processor is further programmed or configured to perform an operation comprising comparing the maximum allowable deviation to the deviation of the actual flow rate from the programmed flow rate over the specified time interval to determine a flow rate correction, and calculating the new programmed flow rate for the subsequent time interval based on the programmed flow rate and the flow rate correction.

17 . The fluid injector system of claim 16 , wherein the flow rate correction is equal to the maximum allowable deviation if the deviation of the actual flow rate from the programmed flow rate is greater than the maximum allowable deviation.

18 . A computer-implemented method for monitoring performance of a fluid injector system configured for use in administering at least one fluid to a patient, the method comprising:
storing, in a memory device, a programmed flow rate for the fluid to be delivered and a maximum allowable deviation in the programmed flow rate during a fluid delivery procedure using a fluid injector; measuring, using at least one sensor, a pressure of the at least one fluid generated by at least one drive component of the fluid injector during execution of the fluid delivery p

Assignees

• Bayer Healthcare Llc

Inventors

• Mcdermott Michael
• Barone William
• Lee Randy

Classifications

• A61M2205/70

  with testing or calibration facilities · CPC title

• A61M2205/502

  User interfaces, e.g. screens or keyboards · CPC title

• A61M2205/3334

  Measuring or controlling the flow rate · CPC title

• A61M2205/332

  Force measuring means · CPC title

• A61M2005/14208

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