Pumping cassette

• US 9,550,018 B2
• Filed: 02/29/2016
• Issued: 01/24/2017
• Est. Priority Date: 02/27/2007
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Demers, Jason A., Wilt, Michael J., Grant, Kevin L., Dale, James D., Tracey, Brian D.
• Primary Examiner(s): Wiest, Philip R
• Application Number:
  US15/056,701
• Publication Number:
  US 20160175505A1
• Time in Patent Office: 330 Days
• Field of Search: 604 401- 601, 604/6.09, 604/6.1, 604/6.11, 604/6.16, 604/403, 422/44, 210645-647, 210250-252, 210/650, 210/97, 210/98
• US Class Current: 1/1
• 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 fluid pumping cassette comprising:

a metering pump, the metering pump comprising;

a fluid pumping chamber separated from an actuation chamber by a flexible membrane;

the actuation chamber having an actuation port for connection to a pneumatic air source to provide positive or negative pneumatic pressure to the flexible membrane;

the fluid pumping chamber having a first fluid port, second fluid port, and third fluid port for directing the movement of a fluid;

a first fluid valve being interposed between the first fluid port and a first fluid path in the fluid pumping cassette;

a second fluid valve being interposed between the second fluid port and a second fluid path in the fluid pumping cassette; and

a third fluid valve being interposed between the third fluid port and a third fluid path in the fluid pumping cassette, wherein

the metering pump is configured to pump a first fluid from the first fluid path to the second fluid path by operation of the first, second and third fluid valves; and

the metering pump is configured to pump a second fluid from the second fluid path to the third fluid path by operation of the first, second and third fluid valves.

2. The fluid pumping cassette of claim 1, wherein the first fluid is air.

3. The fluid pumping cassette of claim 1, wherein the third fluid path is in fluid communication with a fourth fluid path within the fluid pumping cassette, the fourth fluid path configured to carry a third fluid from an inlet through a pump to an outlet of the fluid pumping cassette.

4. The fluid pumping cassette of claim 3, wherein the fluid pumping cassette comprises a top plate, mid-plate and a bottom plate, the top plate configured to carry the first, second and third fluid paths;

and the bottom plate configured to include the actuation port;

wherein the first fluid path is connected to a first port on the top plate, and the second fluid path is connected to a second port on the top plate.

5. The fluid pumping cassette of claim 4, wherein the first port is an air vent.

6. The fluid pumping cassette of claim 4, wherein the second port comprises a hollow spike.

7. The fluid pumping cassette of claim 4, wherein the inlet and outlet are on the mid-plate of the fluid pumping cassette.

8. The fluid pumping cassette of claim 4, wherein the first, second, and third fluid valves, each comprise a pneumatically actuated membrane valve, each said fluid valve having a valving chamber separated from a valve actuation port by a flexible valve membrane, and wherein the fluid valves are configured to permit fluid flow or prevent fluid flow through the valving chamber by the application of positive or negative pneumatic pressure via the valve actuation port.

9. The fluid pumping cassette of claim 8, wherein the bottom plate includes the valve actuation port of each said fluid valve.

10. The fluid pumping cassette of claim 9, wherein the actuation ports of the fluid valves and metering pump are configured to be connected to a pneumatic pressure source controlled by a controller capable of intermittently or alternately providing positive and negative pressurizations to the metering pump and fluid valves.

11. The fluid pumping cassette of claim 9, wherein the actuation ports of the fluid valves and metering pump are configured to be connected to a pneumatic pressure source controlled by a controller capable of intermittently or alternately providing positive and negative pressurizations to the metering pump and fluid valves.

12. A fluid pumping cassette comprising:

a metering pump, the metering pump comprising;

a fluid pumping chamber separated from an actuation chamber by a flexible membrane;

the actuation chamber having an actuation port for connection to a pneumatic air source to provide positive or negative pneumatic pressure to the flexible membrane;

the fluid pumping chamber having a first fluid port, second fluid port, and third fluid port for directing the movement of a fluid;

a first fluid valve being interposed between the first fluid port and a first fluid path in the fluid pumping cassette;

a second fluid valve being interposed between the second fluid port and a second fluid path in the fluid pumping cassette; and

a third fluid valve being interposed between the third fluid port and a third fluid path in the fluid pumping cassette, wherein

the metering pump is configured to pump air from the first fluid path to the second fluid path by operation of the first, second and third fluid valves; and

the metering pump is configured to pump a first fluid from the second fluid path to the third fluid path by operation of the first, second and third fluid valves.

13. The fluid pumping cassette of claim 12, wherein the third fluid path is in fluid communication with a fourth fluid path within the fluid pumping cassette, wherein the fourth fluid path is configured to carry a second fluid from an inlet through a pump to an outlet of the fluid pumping cassette.

14. The fluid pumping cassette of claim 13, wherein the fluid pumping cassette comprises a top plate, mid-plate and a bottom plate, the top plate configured to carry the first, second and third fluid paths;

and the bottom plate configured to include the actuation port;

wherein the first fluid path is connected to a first port on the top plate, and the second fluid path is connected to a second port on the top plate.

15. The fluid pumping cassette of claim 14, wherein the first port is an air vent.

16. The fluid pumping cassette of claim 14, wherein the second port comprises a hollow spike.

17. The fluid pumping cassette of claim 14, wherein the inlet and outlet are on the mid-plate of the fluid pumping cassette.

18. The fluid pumping cassette of claim 14, wherein the first, second, and third fluid valves each comprise a pneumatically actuated membrane valve, each said fluid valve having a valving chamber separated from a valve actuation port by a flexible valve membrane, and wherein the fluid valves are configured to permit fluid flow or prevent fluid flow through the valving chamber by the application of positive or negative pneumatic pressure via the valve actuation port.

19. The fluid pumping cassette of claim 18, wherein the bottom plate includes the valve actuation port of each said fluid valve.