SYSTEM, METHOD, AND APPARATUS FOR UTILIZING A PUMPING CASSETTE

• US 20140286794A1
• Filed: 06/02/2014
• Published: 09/25/2014
• Est. Priority Date: 07/20/1999
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Gray, Larry B., Bryant, Robert J. Jr., Spencer, Geoffrey P.
• Granted Patent: US 9,039,395 B2
• Time in Patent Office: Days
• US Class Current: 417/53
• CPC Class Codes: A61M 1/1649 with pulsatile dialysis fluid flow
• CPC Class Codes: A61M 1/267 used for pumping
• CPC Class Codes: A61M 1/362227 the interface providing means for actuating on functional elements of the cassette, e.g. plungers
• CPC Class Codes: A61M 1/36225 with blood pumping means or components thereof
• CPC Class Codes: A61M 1/362261 at least one cassette surface or portion thereof being flexible, e.g. the cassette having a rigid base portion with preformed channels and being covered with a foil
• CPC Class Codes: A61M 1/362264 the filter being a blood filter
• CPC Class Codes: A61M 1/362265 Details of valves
• CPC Class Codes: A61M 1/362266 Means for adding solutions or substances to the blood
• CPC Class Codes: A61M 1/367 Circuit parts not covered by the preceding subgroups of group A61M1/3621
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2209/02 Equipment for testing the apparatus
• CPC Class Codes: A61M 39/228 with a tubular diaphragm constrictable by radial fluid force
• CPC Class Codes: A61M 5/14 Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
• CPC Class Codes: A61M 5/14224 Diaphragm type
• CPC Class Codes: A61M 5/14593 the diaphragm being actuated by fluid pressure
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: F04B 43/067 the fluid being actuated directly by a piston
• CPC Class Codes: F04B 45/00 Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
• CPC Class Codes: F04B 45/02 having bellows
• CPC Class Codes: F04B 49/065 and making use of computers
• CPC Class Codes: F04B 49/12 : by varying the length of stroke of the working members
• CPC Class Codes: F04B 53/10 : Valves; Arrangement of valves
• CPC Class Codes: F04B 53/16 : Casings; Cylinders; Cylinder liners or heads; Fluid connections
• CPC Class Codes: G01M 3/26 : by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
• CPC Class Codes: G01M 3/32 : for containers, e.g. radiators
• CPC Class Codes: G05D 16/20 : characterised by the use of electric means

Abstract

The present invention involves, in some embodiments, systems and methods involving fluid handling apparatus for pumping fluid to and from a patient, which may include a reusable component and a disposable pumping cartridge. The reusable component may comprise a control chamber and a pressure transducer configured to measure a gas pressure associated with the control chamber, as well as a processor. The processor may be configured to supply the control chamber with a gas at a predetermined pressure, monitor the gas pressure associated within the control chamber with the pressure transducer over a predetermined period of time, and determine if the change in gas pressure associated within the control chamber exceeds a maximum allowable predetermined limit.

Claims

1. A fluid handling system for pumping fluid to and from a patient configured to perform a dry cartridge integrity test, the system comprising:

a reusable component comprising;

a control chamber; and

a pressure transducer configured to measure a gas pressure associated with the control chamber; and

a disposable pumping cartridge comprising;

a flexible membrane;

a rigid portion comprising a pump chamber, the flexible membrane overlying the pump chamber;

an inlet and an outline line; and

a valve configured to isolate the pump chamber of the disposable pumping cartridge,

wherein the disposable pumping cartridge configured to mate with the reusable component, wherein the control chamber of the reusable component mates with the pump chamber of the disposable pumping cartridge, and

wherein the processor configured to;

supply the control chamber with a gas at a predetermined pressure;

open the valve wherein the pump chamber of the disposable pumping cartridge is not isolated from the surroundings;

monitor the gas pressure associated within the control chamber with the pressure transducer over a predetermined period of time; and

determine if the change in gas pressure associated with the control chamber exceeds a maximum allowable predetermined limit.

2. The system of claim 1, wherein if the change in gas pressure associated with the control chamber exceeds a maximum allowable predetermined limit, indicate a fault condition.

3. The system of claim 1, wherein if the change in gas pressure associated with the control chamber fails to exceed a maximum allowable predetermined limit, commence operation of the system.

4. The system of claim 2, wherein the reusable component configured to terminate operation of the pumping cartridge if the change in gas pressure associated within the control chamber exceeds a maximum allowable predetermined limit.

5. The system of claim 1, wherein the processor configured to monitor the gas pressure associated within the control chamber with the pressure transducer over a predetermined period of time after open the valve wherein the pump chamber of the pumping cartridge is not isolated from the surroundings.

6. The system of claim 1, wherein the processor configured to monitor the gas pressure associated within the control chamber with the pressure transducer over a predetermined period of time after supply the control chamber with a gas at a predetermined pressure.

7. A fluid handling apparatus for pumping fluid to and from a patient comprising:

a control chamber; and

a pressure transducer configured to measure a gas pressure associated with the control chamber; and

a processor, the processor configured to;

supply the control chamber with a gas at a predetermined pressure;

monitor the gas pressure associated within the control chamber with the pressure transducer over a predetermined period of time; and

determine if the change in gas pressure associated within the control chamber exceeds a maximum allowable predetermined limit.

8. The apparatus of claim 7, further comprising wherein determine if the change in the gas pressure exceeds a maximum fault condition comprising if the change in the gas pressure exceeds a maximum fault conditions, indicate a fault condition.

9. The apparatus of claim 8, wherein indicate a fault condition further comprising terminate operation of the pumping cartridge.

10. The apparatus of claim 7, further comprising close at least one valve to the control chamber wherein the control chamber is isolated.

11. The apparatus of claim 7, further comprising open at least one inlet valve, wherein the at least one inlet valve in fluid communication with the control chamber.

12. The apparatus of claim 7, further comprising mate the fluid handling apparatus with a pumping cartridge comprising a pump chamber.

13. The apparatus of claim 12, wherein the pumping cartridge is a disposable pumping cartridge.

14. The apparatus of claim 12, further comprising isolate the pump chamber of the pumping cartridge using at least one valve.

15. The apparatus of claim 14, wherein the processor configured to monitor the gas pressure associated within the control chamber with the pressure transducer over a predetermined period of time after isolate the pump chamber of the pumping cartridge using at least one valve.

16. The apparatus of claim 7, wherein the processor configured to monitor the gas pressure associated within the control chamber with the pressure transducer over a predetermined period of time after supply the control chamber with a gas at a predetermined pressure.

17. The apparatus of claim 7, wherein the fluid handling apparatus is a reusable component.

18. A method for using a reusable component of a fluid handling system for pumping fluid to and from a patient to test the integrity of a pumping cartridge, the system comprising a reusable component comprising a control chamber, the method comprising:

supplying the control chamber of the reusable component with a gas at a predetermined pressure;

monitoring the gas pressure associated with the control chamber using a pressure transducer configured to measure a gas pressure associated with the control chamber over a predetermined period of time; and

determining if the change in the gas pressure associated with the control chamber exceeds a maximum allowable predetermined limit.

19. The method of claim 18, further comprising wherein determining if the change in the gas pressure exceeds a maximum fault condition comprising if the change in gas pressure associated with the control chamber exceeds a maximum allowable predetermined limit, indicating a fault condition.

20. The method of claim 19, further comprising wherein indicating a fault condition further comprising terminating operation of the pumping cartridge.

21. The method of claim 18, further comprising opening at least one valve, wherein the at least one valve in fluid communication with the pumping cartridge.

22. The method of claim 18, further comprising mating the pumping cartridge to the reusable component.

23. The method of claim 18, further comprising wherein the pumping cartridge comprising a flexible membrane and a rigid portion comprising a pump chamber, wherein the pumping cartridge configured to mate with the reusable component, wherein the control chamber of the reusable component mates with the pump chamber of the pumping cartridge, opening the pump chamber to the surroundings.

24. The method of claim 23, wherein opening the pump chamber to the surroundings comprising opening at least one valve in fluid communication with the pump chamber.

25. The method of claim 18, further comprising mating the reusable component to the pumping cartridge, the pumping cartridge comprising a pump chamber.

26. The method of claim 25, further comprising isolating the pump chamber of the pumping cartridge using at least one valve.

27. The method of claim 26, wherein the processor configured to monitor the gas pressure associated within the control chamber with the pressure transducer over a predetermined period of time after isolating the pump chamber of the pumping cartridge using at least one valve.

28. The method of claim 18, wherein the processor configured to monitor the gas pressure associated within the control chamber with the pressure transducer over a predetermined period of time after supplying the control chamber with a gas at a predetermined pressure.