Medical Fluid Injector System

• US 20130245439A1
• Filed: 11/21/2011
• Published: 09/19/2013
• Est. Priority Date: 11/24/2010
• Status: Active Grant

• Current Assignee: Liebel-Flarsheim Company (Mallinckrodt plc)
• Original Assignee: Liebel-Flarsheim Company (Mallinckrodt plc)
• Inventors: Small, James R., Fago, Frank M., Perkins, Jeffrey A., Glenn, Mark Jon
• Granted Patent: US 9,855,387 B2
• Time in Patent Office: Days
• US Class Current: 600/432
• CPC Class Codes: A61B 6/548 Remote control of the apparatus or devices
• CPC Class Codes: A61M 2005/14553 comprising a pressure jacket
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 5/1407 Infusion of two or more substances
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/16827 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 Class Codes: A61M 5/2066 comprising means for injection of two or more media, e.g. by mixing

Abstract

A medical fluid injector system (450) is disclosed that may utilize one or more of flow rate determination logic (130), injection volume determination logic (132), display control logic (134), drive ram motion control logic (136), and pressure monitoring logic (138). The flow rate determination logic (130), injection volume determination logic (132), and display control logic (134) each may utilize a concentration input (172, 192, 202) to calculate flow rates, injection volumes, and generate multi-color graphics, respectively, for a simultaneous injection configuration. The drive ram motion control logic (136) may utilize both a target pressure and a monitored pressure to derive a velocity for advancing a drive ram. The pressure monitoring logic (138) may provide a monitored pressure value for the drive ram control logic (136), where this monitored pressure value may be derived from the input power being used to advance a drive ram and the drive ram velocity.

Claims

1. A medical fluid injector system comprising:

a syringe plunger driver comprising a drive source and a drive ram; and

drive ram motion control logic configured to derive a drive ram velocity increase from a target pressure.

2. The medical fluid injector system of claim 1, wherein said drive ram motion control logic is configured to incrementally increase a drive ram velocity in view of said target pressure, until an occurrence of a first condition, and during execution of at least one phase of an injection protocol.

3. The medical fluid injector system of claim 2, wherein said first condition comprises said medical fluid injector system reaching at least one of said target pressure, a target flow rate for an associated phase of said injection protocol, and a termination of an associated phase of said injection protocol.

4. The medical fluid injector system of claim 3, wherein said target flow rate comprises user input.

5. The medical fluid injector system of claim 2, wherein said drive ram motion control logic is configured to incrementally increase a drive ram velocity in view of said target pressure throughout a first time range, wherein said first time range extends from a beginning of an associated phase of said injection protocol and until any occurrence of said first condition.

6. The medical fluid injector system of claim 1, wherein said drive ram motion control logic is to configured to derive each said drive ram velocity increase from said target pressure.

7. The medical fluid injector system of claim 1, wherein said target pressure comprises an independent variable, and wherein a velocity of said drive ram provided by said drive ram motion control logic comprises a dependent variable.

8. The medical fluid injector system of claim 1, wherein said drive ram motion control logic is configured to repeatedly derive a drive ram velocity from said target pressure.

9. The medical fluid injector system of claim 8, wherein said drive ram motion control logic is configured to repeatedly derive said drive ram velocity from both said target pressure and a monitored pressure.

10. The medical fluid injector system of claim 9, wherein said drive ram motion control is configured to repeatedly derive said drive ram velocity from a differential between said target pressure and said monitored pressure.

11. The medical fluid injector system of claim 9, wherein said drive ram motion control logic is configured to repeatedly derive said drive ram velocity to reduce an error between said target pressure and said monitored pressure.

12. The medical fluid injector system of claim 9, further comprising:

pressure monitoring logic configured to derive said monitored pressure provided by said medical fluid injector system from both a power input to said drive source and a velocity of said drive ram.

13. The medical fluid injector system of claim 9, wherein said drive ram motion control logic utilizes at least a two-term controller.

14. The medical fluid injector system of claim 13, wherein a proportional term and a derivative term are used by said controller.

15. The medical fluid injector system of claim 9, wherein said drive ram motion control logic utilizes a proportional-integral-derivative controller.

16. The medical fluid injector system of claim 1, wherein said drive ram motion control logic is configured to recursively derive said drive ram velocity increase from said target pressure.

17. The medical fluid injector system of claim 1, wherein said drive ram motion control logic is configured to iteratively derive said drive ram velocity increase from said target pressure.

18. The medical fluid injector system of claim 1, wherein said drive ram motion control logic is configured to repeatedly derive said drive ram velocity increase from said target pressure.

19. The medical fluid injector system of claim 1, wherein said drive ram motion control logic is configured to derive said drive ram velocity increase both from said target pressure and a monitored pressure.

20. The medical fluid injector system of claim 19, wherein said drive ram motion control is configured to derive said drive ram velocity increase from a differential between said target pressure and said monitored pressure.

21. The medical fluid injector system of claim 19, further comprising:

pressure monitoring logic configured to derive said monitored pressure provided by said medical fluid injector system from both a power input to said drive source and a velocity of said drive ram.

22. The medical fluid injector system of claim 19, wherein said drive ram motion control logic utilizes at least a two-term controller.

23. The medical fluid injector system of claim 22, wherein a proportional term and a derivative term are used by said controller.

24. The medical fluid injector system of claim 19, wherein said drive ram motion control logic utilizes a proportional-integral-derivative controller.

25. A medical fluid injector system comprising:

a syringe plunger driver comprising a drive source and a drive ram; and

,

drive ram motion control logic configured to iteratively derive a drive ram velocity from a beginning of at least one phase of an injection protocol and for at least a portion of said at least one phase, wherein each derivation is based upon a differential between a target pressure and a monitored pressure.

26-72. -72. (canceled)