DIALYSIS SYSTEM HAVING INTEGRATED PNEUMATIC MANIFOLD

• US 20090112151A1
• Filed: 10/30/2007
• Published: 04/30/2009
• Est. Priority Date: 10/30/2007
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter International Inc.
• Inventors: Childers, Robert W., Wellings, Anders, Hecht, Gideon, Chapman, Paul
• Granted Patent: US 7,905,853 B2
• Time in Patent Office: Days
• US Class Current: 604/29
• CPC Class Codes: A61M 1/14 Dialysis systems; Artificial kidneys; Blood oxygenators semi-permeable membranes characterised by the material, manufacturing processes therefor B01D71/00; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
• CPC Class Codes: A61M 1/1524 the interface providing means for actuating on functional elements of the cassette, e.g. plungers
• CPC Class Codes: A61M 1/155 with treatment-fluid pumping means or components thereof
• CPC Class Codes: A61M 1/1562 Details of incorporated reservoirs
• CPC Class Codes: A61M 1/1565 Details of valves
• CPC Class Codes: A61M 1/1621 Constructional aspects thereof semi-permeable membranes for separation processes characterised by their properties B01D69/00; semi permeable membranes characterised by their material B01D71/00
• CPC Class Codes: A61M 1/1649 with pulsatile dialysis fluid flow
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 1/281 Instillation other than by gravity
• CPC Class Codes: A61M 1/30 Single needle dialysis ; Reciprocating systems, alternately withdrawing blood from and returning it to the patient, e.g. single-lumen-needle dialysis or single needle systems for hemofiltration or pheresis
• CPC Class Codes: A61M 1/3624 Level detectors; Level control
• 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 2205/42 Reducing noise
• CPC Class Codes: A61M 60/268 the displacement member being flexible, e.g. membranes, diaphragms or bladders
• CPC Class Codes: A61M 60/427 the force acting on the blood contacting member being hydraulic or pneumatic
• CPC Class Codes: A61M 60/508 Electronic control means, e.g. for feedback regulation
• CPC Class Codes: A61M 60/847 arranged in a cassette
• CPC Class Codes: A61M 60/857 Implantable blood tubes
• CPC Class Codes: A61M 60/892 Active valves, i.e. actuated by an external force
• CPC Class Codes: B01J 2219/00396 : Membrane valves
• CPC Class Codes: B01J 2219/00398 : in multiple arrangements
• CPC Class Codes: B01J 2219/00409 : Solenoids in combination with valves
• CPC Class Codes: B01J 2219/00412 : In multiple arrangements
• CPC Class Codes: F15B 1/02 : Installations or systems with accumulators
• CPC Class Codes: F15B 1/021 : used for damping
• CPC Class Codes: F15B 13/0807 : Manifolds
• CPC Class Codes: F15B 13/0814 : Monoblock manifolds
• CPC Class Codes: F15B 13/0817 : Multiblock manifolds
• CPC Class Codes: F15B 13/0821 : Attachment or sealing of modular units to each other
• CPC Class Codes: F15B 13/0825 : the modular elements being mounted on a common member, e.g. on a rail
• CPC Class Codes: F15B 13/0828 : characterised by sealing means of the modular units
• CPC Class Codes: F15B 13/0832 : Modular valves
• CPC Class Codes: F15B 13/0835 : Cartridge type valves
• CPC Class Codes: F15B 13/0842 : Monoblock type valves, e.g. with multiple valve spools in a common housing
• CPC Class Codes: F15B 21/006 : Compensation or avoidance of ambient pressure variation
• CPC Class Codes: F15B 21/008 : Reduction of noise or vibration
• CPC Class Codes: F16K 2099/0082 : Microvalves adapted for a particular use
• CPC Class Codes: F16K 2099/0086 : Medical applications
• CPC Class Codes: F16K 99/0042 : Electric operating means therefor
• CPC Class Codes: Y10T 137/86027 : Electric

Abstract

A dialysis machine valve manifold assembly includes a plurality of pneumatic valves; a plate including a first side and a second side, the plurality of pneumatic valves mounted to the first side of the plate, the second side of the plate defining a plurality of pneumatic flow paths; and a port header mounted removably to the plate, the port header including a plurality of ports configured to connect sealingly to pneumatic tubing, the ports in fluid communication with the pneumatic valves via the pneumatic flow paths defined in the plate.

Claims

1. A dialysis machine valve manifold assembly comprising:

a plurality of pneumatic valves;

a plate including a first side and a second side, the plurality of pneumatic valves mounted to the first side of the plate, the second side of the plate defining a plurality of pneumatic flow paths; and

a port header mounted removably to the plate, the port header including a plurality of ports configured to connect sealingly to pneumatic tubing, the ports in fluid communication with the pneumatic valves via the pneumatic flow paths defined in the plate.

2. The dialysis machine valve manifold assembly of claim 1, wherein the port header is mounted removably to the first side of the plate along with the plurality of pneumatic valves.

3. The dialysis machine valve manifold assembly of claim 1, the header includes a flow path from each port to a header opening, the flow paths of the plate each leading to a plate opening, the header openings mating with the plate openings for fluid communication between the ports and the pneumatic valves.

4. The dialysis machine valve manifold assembly of claim 3, one of the plate and header defining a seal-receiving groove around each plate opening or header opening.

5. The dialysis machine valve manifold assembly of claim 1, the plate a first plate, and which includes a second plate connected sealingly to the first plate, at least one of a pressure holding reservoir and a pneumatic pump connected to the second plate.

6. The dialysis machine valve manifold assembly of claim 5, which includes at least one noise reducing filter located between the first and second plates.

7. The dialysis machine valve manifold assembly of claim 5, the second plate connected sealingly to the first plate via a gasket that spans at least most of an area of interface between the first and second plates.

8. The dialysis machine valve manifold assembly of claim 1, the pneumatic valves including electrical contacts, the valves further mounted to a printed circuit board (“

PCB”

) such that the electrical contacts communicate electrically with electrodes formed on the PCB.

9. The dialysis machine valve manifold assembly of claim 1, the port header a first port header, the flow paths first flow paths, the valves first valves, and which includes a second port header mounted removably to the plate, the second port header including second ports communicating with second valves attached to the plate via second flow paths formed in the plate.

10. The dialysis machine valve manifold assembly of claim 1, further including a pneumatic pump and a heat sinking member that transfers heat from the pump to the manifold.

11. The dialysis machine valve manifold assembly of claim 10, the heat sinking member including a thermally conductive pad connected to the pump.

12. The dialysis machine valve manifold assembly of claim 1, further including a pneumatic pump having a first pump head for producing positive pressure for at least one of the valves and a second pump head for producing negative pressure for at least one of the valves.

13. The dialysis machine valve manifold assembly of claim 12, including first and second reservoirs, the first reservoir storing positive pressure from the first pump head for the at least one positive pressure valve, the second reservoir storing negative pressure from the second pump head for the at least one negative pressure valve.

14. The dialysis machine valve manifold assembly of claim 13, the first and second reservoirs formed in a single reservoir housing connected sealingly to the manifold.

15. A dialysis system comprising:

a plurality of pneumatic valves;

a pneumatic pump;

a first vessel configured to be pressurized by the pump and to operate a first component of the dialysis system;

a second vessel configured to be pressurized by the pump and to operate a second component of the dialysis system; and

an arrangement of the pneumatic valves such that the first and second pressure vessels hold pressure from the pump independent of one another.

16. The dialysis system of claim 15, the arrangement of the pneumatic valves including a three-way valve, the first and second reservoirs holding pressure from the pump independently via the three-way valve.

17. The dialysis system of claim 15, the arrangement including one of a check valve and a solenoid valve, the first and second reservoirs holding pressure from the pump independently via the check valve or the solenoid valve.

18. The dialysis system of claim 15, the first component of the system a tubing occluder, the second component of the system a cassette interface plate configured to interface with a fluid pumping cassette, the first vessel pressurized to operate the occluder independent of the second vessel pressurized to seal the cassette against the interface plate.

19. The dialysis system of claim 15, the first vessel a pressure reservoir, the first component at least one of the pneumatic valves, the second vessel an inflatable bladder, the second component a tubing occluder or a cassette interface plate configured to interface with a fluid pumping cassette.

20. A dialysis system comprising:

a pneumatic valves;

a pneumatic pump in fluid communication with the pneumatic valve;

a pneumatic line communicating with an inlet and an outlet of the pneumatic pump;

a flow restrictor placed in the pneumatic line; and

a logic implementer programmed to operate the pneumatic valves to either (i) communicate the outlet with the inlet of the pneumatic pump through the flow restrictor and the pneumatic line;

or (ii) communicate the outlet of the pneumatic pump with a component of the dialysis system.

21. The dialysis system of claim 20, the pneumatic pump including first and second pump heads, the pneumatic line a first pneumatic line communicating with the first pump head, the flow restrictor a first flow restrictor, and which includes a second pneumatic line including a second flow restrictor and communicating with the second pump head.