SYSTEM INCLUDING MACHINE INTERFACE FOR PUMPING CASSETTE-BASED THERAPIES

• US 20070213653A1
• Filed: 12/28/2006
• Published: 09/13/2007
• Est. Priority Date: 07/19/2002
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter International Inc.
• Inventors: Howard, David, Grippo, Paul, Yang, Tahua, Vescovi, David, Avoy, Richard, Yu, Alex, Kellam, Benjamin, Booras, John, Lauman, Brian, Shang, Sherwin, Childers, Robert, Bowman, Joseph, Hopping, Andrew, Jerrell, Jeffrey
• Granted Patent: US 7,867,189 B2
• Time in Patent Office: Days
• US Class Current: 604/29
• CPC Class Codes: A61M 1/1522 the interface being evacuated interfaces to enhance contact
• 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 1/1562 Details of incorporated reservoirs
• CPC Class Codes: A61M 1/1565 Details of valves
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1696 with dialysate regeneration
• 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 1/284 Continuous flow peritoneal dialysis [CFPD]
• CPC Class Codes: A61M 2205/122 using evacuated interfaces to enhance contact

Abstract

A dialysis machine includes: a hardware unit including at least one pump actuator, at least one valve actuator and a cassette interface, the cassette interface including: (i) a plate that abuts the cassette; (ii) at least one pump aperture defined by the plate; (iii) at least one pump head moveable out of and retractable into the at least one pump aperture to operate a pumping portion of the cassette; (iv) at least one valve aperture defined by the plate; (v) at least one valve apparatus moveable out of and retractable into the at least one valve aperture to operate a valve portion of the cassette; (vi) at least one sensor aperture defined by the plate; and (vii) at least one sensor located in the least one sensor aperture, the at least one sensor operable with a sensor portion of the cassette.

Claims

1. A peritoneal dialysis machine comprising:

a hardware unit including at least one pump actuator, at least one valve actuator and a disposable cassette interface, the cassette interface including;

a plate that faces the cassette when loaded into the machine;

at least one pump aperture defined by the plate;

at least one pump head moveable out of and retractable into the at least one pump aperture to operate a pumping portion of the cassette;

at least one valve aperture defined by the plate;

at least one valve apparatus moveable out of and retractable into the at least one valve aperture to operate a valve portion of the cassette;

at least one sensor aperture defined by the plate; and

at least one sensor located in the least one sensor aperture, the at least one sensor operable with a sensor portion of the cassette.

2. The peritoneal dialysis machine of claim 1, wherein at least one of the pump head and the valve apparatus is operated at least partially using negative pressure.

3. The peritoneal dialysis machine of claim 1, wherein at least one of the pump head and the valve apparatus is at least one of:

(i) retracted using negative pressure; and

(ii) pushed out of the associated aperture mechanically.

4. The peritoneal dialysis machine of claim 1, wherein at least one of the pump head and the valve apparatus is spring-loaded for outward movement.

5. The peritoneal dialysis machine of claim 1, wherein the pump head is sized to mate with a pump chamber of the pump portion of the cassette.

6. The peritoneal dialysis machine of claim 1, wherein the valve apparatus is shaped to occlude a valve seat of the valve portion of the cassette.

7. The peritoneal dialysis machine of claim 1, wherein the interface further includes a door placed in a hinged relationship with respect to the plate.

8. The peritoneal dialysis machine of claim 7, wherein the door includes an inflatable bladder that can apply a holding pressure to the cassette.

9. A peritoneal dialysis machine comprising:

an enclosure;

a plate carried by the enclosure, the plate facing a disposable cassette when the cassette loaded into the machine;

at least one pump aperture defined by the plate,

at least one valve aperture defined by the plate, and

at least one sensor aperture defined by the plate; and

a base aligned with the plate;

at least one pump actuator connected to the base and aligned with the at least one pump aperture defined by the plate,

at least one valve actuator connected to the base and aligned with the at least one valve aperture defined by the plate, and

at least one sensor connected to the base and aligned with the at least one sensor aperture defined by the plate.

10. The peritoneal dialysis machine of claim 9, wherein at least one of:

(i) the plate is connected to the base;

(ii) the at least one pump actuator includes a pump head moveable out of and retractable into the at least one pump aperture to operate a pumping portion of the cassette; and

(iii) the at least one valve actuator includes an apparatus moveable out of and retractable into the at least one valve aperture to operate a valve portion of the cassette.

11. The peritoneal dialysis machine of claim 9, which includes a plurality of pump actuators configured to operate with the cassette so that one pump actuator draws fluid into the cassette as the second pump actuator pushes fluid out of the cassette.

12. The peritoneal dialysis machine of claim 9, wherein at least one of the pump actuator and the valve actuator is configured to operate using negative pressure.

13. The peritoneal dialysis machine of claim 9, wherein the base includes at least one pneumatic passageway leading to at least one of the pump actuator and the valve actuator.

14. A peritoneal dialysis machine operable with a disposable cassette, the machine comprising:

a base including at least one pump actuator, at least one valve actuator and at least one sensor;

a door in a hinged relationship with respect to the base, the door including an inflatable bladder, the bladder inflatable configured to hold the disposable cassette in operable relationship with the at least one pump actuator, at least one valve actuator and at least one sensor.

15. The peritoneal dialysis machine of claim 14, which includes a plate aligned with the base, the plate defining at least one pump aperture, at least one valve aperture and at least one sensor aperture.

16. The peritoneal dialysis machine of claim 15, wherein the at least one pump aperture is aligned with the at least one pump actuator, the at least one valve aperture is aligned with the at least one valve actuator and the at least one sensor aperture is aligned with the at least one sensor.

17. The peritoneal dialysis machine of claim 14, wherein the door resides in a horizontal relationship with respect to the base when the machine is set for operation.

18. The peritoneal dialysis machine of claim 14, which is configured such that the inflatable bladder contacts the cassette directly.

19. A peritoneal dialysis machine comprising

a cassette enclosure including two substantially flat surfaces configured to receive and hold a cassette which is at least partially flexible and which has predetermined flow paths, the cassette being aligned with the two surfaces, one of the substantially flat surfaces being fixed and the other being hinged relative to the fixed surface to hold the cassette in alignment with the flat surfaces when the hinged surface is closed;

and

an inflatable pad disposed in alignment with the two surfaces and on a hinged surface side of the cassette, the pad for compressing the cassette in an aligned and secure engagement between the two surfaces when the hinged surface is closed, the inflatable pad inflated via pressure to maintain the aligned and secure engagement of the cassette between the two surfaces.

20. The peritoneal dialysis machine of claim 19, wherein the inflatable pad is located between the two substantially flat surfaces.