Pumping Cassette

• US 20080208103A1
• Filed: 10/12/2007
• Published: 08/28/2008
• Est. Priority Date: 02/27/2007
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Grant, Kevin L., Demers, Jason A., Dale, James D., Wilt, Michael J., Tracey, Brian
• Granted Patent: US 8,273,049 B2
• Time in Patent Office: Days
• US Class Current: 604/6.11
• CPC Class Codes: A61M 1/154 with sensing means or components thereof
• CPC Class Codes: A61M 1/155 with treatment-fluid pumping means or components thereof
• CPC Class Codes: A61M 1/1561 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 1/15625 the reservoirs acting as balance chambers
• CPC Class Codes: A61M 1/1565 Details of valves
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1605 Physical characteristics of the dialysate fluid
• CPC Class Codes: A61M 1/1639 linked by membranes
• CPC Class Codes: A61M 1/1656 Apparatus for preparing dialysates
• CPC Class Codes: A61M 1/1664 with temperature control
• CPC Class Codes: A61M 1/1666 by dissolving solids
• CPC Class Codes: A61M 1/287 Dialysates therefor
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/128 with incorporated valves
• CPC Class Codes: A61M 2205/3317 Electromagnetic, inductive or dielectric measuring means
• CPC Class Codes: A61M 2205/3324 PH measuring means
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/268 the displacement member being flexible, e.g. membranes, diaphragms or bladders
• CPC Class Codes: A61M 60/37 Haemodialysis, haemofiltration or diafiltration
• CPC Class Codes: A61M 60/427 : the force acting on the blood contacting member being hydraulic or pneumatic
• CPC Class Codes: A61M 60/43 : using vacuum at the blood pump, e.g. to accelerate filling
• CPC Class Codes: A61M 60/837 : Aspects of flexible displacement members, e.g. shapes or materials
• CPC Class Codes: A61M 60/847 : arranged in a cassette
• CPC Class Codes: A61M 60/849 : Disposable parts
• CPC Class Codes: A61M 60/851 : Valves
• CPC Class Codes: A61M 60/892 : Active valves, i.e. actuated by an external force
• CPC Class Codes: A61M 60/894 : Passive valves, i.e. valves actuated by the blood
• CPC Class Codes: F04B 13/02 : of two or more fluids at the same time
• CPC Class Codes: F04B 23/06 : the pumps being all of reciprocating positive-displacement type
• CPC Class Codes: F04B 41/06 : Combinations of two or more pumps
• CPC Class Codes: F04B 43/00 : Machines, pumps, or pumping installations having flexible working members pumps or pumping installations specially adapted for elastic fluids F04B45/00
• CPC Class Codes: F04B 43/026 : each plate-like pumping flexible member working in its own pumping chamber
• CPC Class Codes: F04B 43/06 : Pumps having fluid drive
• CPC Class Codes: F04B 43/0736 : with two or more pumping chambers in parallel
• CPC Class Codes: F04B 45/02 : having bellows
• CPC Class Codes: F04B 45/0536 : the actuating fluid being controlled by one or more valves
• CPC Class Codes: F04B 49/02 : Stopping, starting, unloading or idling control
• CPC Class Codes: F04B 49/22 : by means of valves F04B49/03 takes precedence
• CPC Class Codes: F04B 53/06 : Venting
• 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: F04B 7/02 : the valving being fluid-actuated
• CPC Class Codes: F04B 9/109 : having plural pumping chambers
• CPC Class Codes: F17D 3/00 : Arrangements for supervising or controlling working operations
• CPC Class Codes: Y02A 90/10 : Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
• CPC Class Codes: Y10T 137/0324 : With control of flow by a condition or characteristic of a fluid
• CPC Class Codes: Y10T 137/0379 : By fluid pressure
• CPC Class Codes: Y10T 137/2521 : Flow comparison or differential response
• CPC Class Codes: Y10T 137/85978 : With pump
• CPC Class Codes: Y10T 137/86139 : Serial

Abstract

A pump cassette is disclosed. The pump cassette includes a housing having at least, one fluid inlet line and at least one fluid outlet line. The cassette also includes at least one reciprocating pressure displacement membrane pump within the housing. The pressure pump pumps a fluid from the fluid inlet line to the fluid outlet line. A hollow spike is also included on the housing as well as at least one metering pump The metering pump is fluidly connected to the hollow spike on the housing and to a metering pump fluid line. The metering pump fluid line is fluidly connected to the fluid outlet line.

Claims

1. A pump cassette comprising:

a housing comprising at least one fluid inlet line and at least one fluid outlet line;

at least one reciprocating pressure displacement membrane pump within said housing wherein said pressure pump pumps a fluid from said fluid inlet line to said fluid outlet line;

a hollow spike on said housing; and

at least one metering pump, said metering pump fluidly connected to said hollow spike on said housing and to a metering pump fluid line, wherein said metering pump fluid line is fluidly connected to said fluid outlet line.

2. The cassette claimed in claim 1 wherein said reciprocating pressure displacement pump comprising:

a curved rigid chamber wall; and

a flexible membrane attached to said rigid chamber wall, whereby said flexible membrane and said rigid chamber wail define a pumping chamber.

3. The cassette claimed in claim 1 further comprising an air vent fluidly connected to said metering pump fluid line.

4. The cassette claimed in claim 3 further comprising an air filter connected to said air vent.

5. The cassette claimed in claim 1 wherein said cassette housing comprising:

a top plate;

a midplate; and

a bottom plate.

6. The cassette claimed in claim 1 further comprising a container attachment comprising:

a container support device for receiving and maintaining a container; and

a cassette attachment device for attaching to said spike on said cassette, said cassette attachment device comprising a housing and needle inside housing, said needle in fluid communication with said container support device.

7. The cassette claimed in claim 1 further comprising at least one valve.

8. The cassette claimed in claim 7 wherein said at least one valve comprising a valve housing having a membrane, said membrane dividing said housing into two chambers, an actuation chamber and a liquid chamber.

9. The cassette claimed in claim 8 wherein said actuation chamber having at least one aperture and said liquid chamber having at least one aperture.

10. The cassette claimed in claim 9 wherein said actuation chamber comprising two apertures.

11. The cassette claimed in claim 10 wherein said liquid chamber comprising a substantially smooth surface.

12. The cassette claimed in claim 10 wherein said actuation chamber comprising at least one raised feature.

13. The cassette claimed in claim 10 said valve is a volcano valve.

14. A pump cassette comprising:

a housing comprising at least one fluid inlet line and at least one fluid outlet line;

at least one reciprocating pressure displacement membrane pump within said housing wherein said pressure pump pumps a fluid from said fluid inlet line to said fluid outlet line; and

a second fluid administering system within said housing comprising;

a metering membrane pump;

a second fluid inlet line for pumping a volume of a second fluid into said fluid outlet line;

a hollow spike for fluid communication of said second fluid into said second fluid inlet line; and

an air vent fluidly connected to said second fluid inlet line.

15. The cassette claimed in claim 14 wherein said reciprocating pressure displacement pump comprising:

a curved rigid chamber wall; and

a flexible membrane attached to said rigid chamber wall, whereby said flexible membrane and said rigid chamber wall define a pumping chamber.

16. The cassette claimed in claim 14 wherein said housing further comprising:

a top plate;

a midplate; and

a bottom plate.

17. A blood pump cassette comprising:

a housing comprising at least one blood inlet line for pumping blood from a patient and one blood outlet line for pumping blood to a dialyzer;

at least two reciprocating pressure displacement membrane pumps within said housing wherein said pressure pumps pump said blood from a patient to said dialyzer;

at least two valves, said valves comprising;

a housing; and

a membrane, said membrane dividing said housing into two chambers, an actuation chamber and a liquid chamber, said actuation chamber having at least one aperture and said liquid chamber having at least two apertures and wherein said liquid chamber comprising a substantially smooth surface; and

a heparin administering system within said housing comprising;

a membrane pump;

a heparin inlet line for pumping a volume of heparin into said blood outlet line;

a hollow spike for fluid communication of heparin into said heparin inlet line; and

an air Alter fluidly connected to said heparin inlet line for trapping air.

18. The cassette claimed in claim 17 wherein said reciprocating pressure displacement pumps comprising:

a curved rigid chamber wall; and

a flexible membrane attached to said rigid chamber wall, whereby said flexible membrane and said rigid chamber wall define a pumping chamber.

19. The cassette claimed in claim 17 wherein said housing further comprising:

a top plate;

a midplate; and

a bottom plate.

20. The cassette claimed in claim 17 wherein said reciprocating pressure displacement membrane pumps comprising a membrane dimpled on at least one surface.