Medical fluid therapy flow balancing and synchronization system

• US 7,029,456 B2
• Filed: 10/15/2003
• Issued: 04/18/2006
• Est. Priority Date: 10/15/2003
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Inventors: Ware, Lee C., Boehnlein, Arnold F.
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US10/685,724
• Publication Number:
  US 20050085760A1
• Time in Patent Office: 916 Days
• Field of Search: 604/65, 604/66, 604/67, 604/4.01, 604/5.01, 604/5.02, 604/5.03, 604/5.04, 604 601- 616, 604/131, 128/DIG.12, 128/DIG.13
• US Class Current: 604/131
• CPC Class Codes: A61M 1/3434 with pre-dilution and post-dilution
• CPC Class Codes: A61M 1/3437 downstream of the filter, e.g. post-dilution with filtrate
• CPC Class Codes: A61M 1/3441 Substitution rate control as a function of the ultrafiltration rate
• CPC Class Codes: A61M 1/3451 the difference in weight between both ultra-filtrate and substitution reservoir being used as control signal
• CPC Class Codes: A61M 2005/14208 with a programmable infusion control system, characterised by the infusion program
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• 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: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

Systems, apparatus and methods that allow external infusion, IV or administration pumps to be synchronized with the internal pumps for a medical fluid therapy machine are provided. The system reduces the time and effort needed to calculate, set-up, enter and maintain flowrates of various fluids, maintained internally or externally with respect to the medical fluid therapy machine. The system also automatically follows therapy requirements, for example, a requirement that one pump/fluid be running/flowing for another pump/fluid to be enabled to run/flow. The system further automatically adjusts for variations in flowrate of one fluid with respect to another. In short, the system provides a more “hands-off”, safe and effective method and apparatus for medical fluid therapy fluid delivery.

Claims

1. A medical fluid flow system comprising:

a blood treatment machine, the machine including a blood cleaning device and an on-board pump connectable fluidly to a patient;

a controller that controls the flow of a first fluid to and from the on-board pump and the patient;

a second pump residing externally from the machine, the second pump configured and arranged to pump a second fluid in response to a signal sent by the controller; and

an operator interface in communication with the controller, the interface operable to receive information inputted from an operator and communicate that information to the controller, wherein the controller controls the on-board and second pumps to pump the first and second fluids using the information.

2. The system of claim 1, wherein the controller is integral to the machine.

3. The system of claim 1, wherein the operator interface is integral to the machine.

4. The system of claim 1, wherein the second pump is configured with a communications device that communicates with the controller.

5. The system of claim 4, wherein the communications device is housed integrally with the second pump.

6. The system of claim 1, wherein the signal is of a type selected from the group consisting of:

a fiber-optic signal, an electrical signal, an analog signal, a digital signal, a radio frequency signal, a microwave signal, an ultrasonic signal, a photo-electric signal, a local area network signal, a wide area network signal, an Internet signal and any combination thereof.

7. The system of claim 1, wherein the first fluid is of a type selected from the group consisting of:

blood, a substitution fluid, a dialysis solution, a hemodialysis fluid, an anticoagulant and any combination thereof.

8. The system of claim 1, wherein the second fluid is of a type selected from the group consisting of:

an electrolyte solution, an intravenous fluid, an anticoagulant, a parenteral nutrition, an enteral nutrition, a fluid via feeding by mouth, a fluid via feeding by tube and any combination thereof.

9. The system of claim 1, wherein the machine includes a third pump that pumps a third fluid and is controlled by the controller.

10. The system of claim 1, which includes a third pump residing externally from the machine, the third pump configured and arranged to pump a third fluid according to a signal sent by the controller.

11. The system of claim 1, wherein the controller comprises a control portion that controls the first and second pumps and an error checking portion that monitors for errors occurring between the control portion and the pumps.

12. The system of claim 1, wherein the blood cleansing device is selected from the group consisting of:

a filter, a dialyzer, a hemofilter, a hemodialyzer, a hemoperfusion cartridge, a hollow fiber plasma separator and any combination thereof.

13. The system of claim 1, which includes at least one flow sensing device operable to provide feedback concerning flow of at least one of the first and second fluids to the controller.

14. The system of claim 1, wherein the external second pump includes an input device that enables the operator to input information to the controller.

15. A medical fluid flow system comprising:

a blood treatment machine, the machine including a blood cleaning device and an on-board pump connectable fluidly to a patient;

a second pump residing externally from the machine, the second pump configured and arranged to pump a second fluid in response to a signal sent by the machine; and

an operator interface including

a display device, the display device including an input device that enables a person to input a desired net fluid gain/loss, and

a processor in communication with the display device, the processor operable to

(i) receive the desired net fluid gain/loss inputted from the device, (ii) monitor flow of the second fluid entering/exiting the patient from/to the second pump, (iii) calculate an actual input/removal flowrate of a first fluid based on the desired net fluid gain/loss inputted from the device and the monitored flow and (iv) command the on-board pump to pump the first fluid at the actual flowrate.

16. The medical fluid flow system of claim 15, wherein the input device includes an area of the display device cooperating with a touch screen, the touch screen in communication with the processor.

17. The medical fluid flow system of claim 15, wherein the input device is configured to enable the desired net fluid gain/loss amount to be raised/lowered to a desired level.

18. The medical fluid flow system of claim 15, wherein the input device includes a toggling device that enables the desired net fluid gain/loss amount to be keyed into the display device.

19. The medical fluid flow system of claim 15, wherein the display device includes a display area that displays at least one of:

(i) the amount of the net fluid gain/loss inputted from the device;

(ii) the monitored flow of at least one of the first and second fluids entering/exiting the patient; and

(iii) the actual input/removal flowrate of at least one of the first and second fluids.

20. The medical fluid flow system of claim 15, wherein the processor is configured to:

(i) update the monitored flow of the second fluid entering/exiting the patient;

(ii) recalculate the actual input/removal flowrate of the first fluid; and

(iii) change the command to the on-board pump to pump the first fluid at the recalculated actual flowrate.

21. The medical fluid flow system of claim 15, wherein the operator interface is attached to the machine.

22. The medical fluid flow system of claim 15, wherein the processor is configured and arranged to receive a communication link to communicate with the remotely located second pump.

23. A medical fluid flow system comprising:

a blood treatment machine, the machine including a blood cleaning device and an on-board pump connectable fluidly to a patient;

a second pump residing externally from the machine, the second pump configured and arranged to pump a second fluid in response to a signal sent by the machine; and

a processor in communication with the display device, the processor operable to (i) perform the equation;

pump rate=total input rate−

total output rate+prescribed net loss rate, wherein at least one of the total input rate and the total output rate includes a flowrate output of the external second pump and (ii) control the on-board pump according to the calculated pump rate.

24. The medical fluid flow system of claim 23, wherein the processor is configured to receive at least one input/output flowrate that has been sensed by a sensor to determine at least one of the total input rate and total output rate.

25. The medical fluid flow system of claim 23, wherein the processor is configured to receive at least one manually inputted input/output flowrate to determine at least one of the total input rate and total output rate.