Hemodialysis system with separate dialysate cassette

• US 8,926,540 B2
• Filed: 08/19/2011
• Issued: 01/06/2015
• Est. Priority Date: 11/05/2003
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter Healthcare Corporation (Baxter International Inc.), Baxter Healthcare SA (Baxter International Inc.)
• Inventors: Lo, Ying-Cheng, Childers, Robert W., Kelly, Thomas D., Rohde, Justin
• Primary Examiner(s): SU, SUSAN SHAN
• Application Number:
  US13/213,812
• Publication Number:
  US 20110297598A1
• Time in Patent Office: 1,236 Days
• US Class Current: 604/5.01
• CPC Class Codes: A61M 1/1522 the interface being evacuated interfaces to enhance contact
• CPC Class Codes: A61M 1/153 the cassette being adapted for heating or cooling the treating fluid, e.g. the dialysate or the treating gas
• 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 1/1563 Details of incorporated filters
• CPC Class Codes: A61M 1/1565 Details of valves
• CPC Class Codes: A61M 1/159 specially adapted for peritoneal dialysis
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1603 Regulation parameters
• CPC Class Codes: A61M 1/1605 Physical characteristics of the dialysate fluid
• CPC Class Codes: A61M 1/1635 with volume chamber balancing devices between used and fresh dialysis fluid
• CPC Class Codes: A61M 1/1639 linked by membranes
• CPC Class Codes: A61M 1/166 Heating for sterilisation A61M1/1686
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 1/284 Continuous flow peritoneal dialysis [CFPD]
• CPC Class Codes: A61M 1/34 Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration
• CPC Class Codes: A61M 1/3401 Cassettes therefor
• CPC Class Codes: A61M 1/36222 Details related to the interface between cassette and machine
• CPC Class Codes: A61M 1/36224 : with sensing means or components thereof
• 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 1/362262 : Details of incorporated reservoirs
• CPC Class Codes: A61M 1/362265 : Details of valves
• CPC Class Codes: A61M 1/3627 : Degassing devices; Buffer reservoirs; Drip chambers; Blood filters
• CPC Class Codes: A61M 2205/127 : with provisions for heating or cooling
• CPC Class Codes: A61M 2205/3331 : Pressure; Flow
• CPC Class Codes: A61M 2205/3368 : Temperature
• CPC Class Codes: A61M 2205/502 : User interfaces, e.g. screens or keyboards
• CPC Class Codes: Y10T 29/49826 : Assembling or joining

Abstract

A hemodialysis system includes (i) a dialyzer; (ii) a blood pump; (iii) a blood cassette operatively connected to the dialyzer and the blood pump; (iv) a dialysate heater; (v) first and second peristaltic dialysate pumps; and (vi) a dialysate cassette separate from the blood cassette, the dialysate cassette including an organizer configured to support a drain tube, a to-dialyzer tube and a from-dialyzer tube, the cassette further including a first pumping tube, a second pumping tube and an inline fluid heating pathway, the cassette when mounted for operation orienting (a) the first pumping tube for operation with the first peristaltic dialysate pump, (b) the second pumping tube for operation with the second peristaltic dialysate pump and (c) the fluid heating pathway for operation with the dialysate heater.

Claims

1. A hemodialysis system comprising:

a dialyzer;

a blood pump;

a blood cassette operatively connected to the dialyzer and the blood pump;

a dialysate heater;

first and second peristaltic dialysate pumps; and

a dialysate cassette separate from the blood cassette, the dialysate cassette including an organizer configured to support a drain tube, a to-dialyzer tube and a from-dialyzer tube, the cassette further including a first pumping tube, a second pumping tube and an inline fluid heating pathway, the cassette when mounted for operation orienting (i) the first pumping tube for operation with the first peristaltic dialysate pump, (ii) the second pumping tube for operation with the second peristaltic dialysate pump and (iii) the fluid heating pathway for operation with the dialysate heater.

2. The hemodialysis system of claim 1, wherein the organizer is a rigid structure.

3. The hemodialysis system of claim 1, wherein the inline fluid heating pathway includes a bent tubular pathway.

4. The hemodialysis system of claim 1, wherein the inline fluid heating pathway includes a serpentine tubular pathway.

5. The hemodialysis system of claim 1, wherein the dialysate cassette includes a plurality of supply tubes supported by the organizer.

6. The hemodialysis system of claim 5, wherein the supply tubes and the drain tube are arranged in a row along the organizer.

7. The hemodialysis system of claim 5, wherein the supply tubes are each in fluid communication with a supply of dialysate.

8. The hemodialysis system of claim 1, wherein the first pumping tube is a to-dialyzer pumping tube, and wherein the fluid heating pathway is located between the to-dialyzer pumping tube and the to-dialyzer tube.

9. The hemodialysis system of claim 1, wherein the dialysate cassette includes rigid internal structures for orienting the first and second pumping tubes and the inline fluid heating pathway.

10. The hemodialysis system of claim 1, wherein the dialysate cassette includes at least one balance chamber for balancing dialysate traveling to and from the dialyzer.

11. The hemodialysis system of claim 1, wherein the dialysate cassette includes an air vent.

12. The hemodialysis system of claim 1, wherein the dialysate cassette is substantially planar such that the cassette can be mounted horizontally or vertically.

13. The hemodialysis system of claim 1, wherein the to-dialyzer tube and the from-dialyzer tube are disposed substantially parallel to one another.

14. The hemodialysis system of claim 1, wherein the drain tube is in fluid communication with a container that is initially a supply container.

15. The hemodialysis system of claim 14, which includes a valve, the dialysate cassette including an area operable with the valve to selectively allow (i) a supply of dialysate to be delivered from the container to the cassette or (ii) the container to receive spent dialysate from the drain tube.

16. A hemodialysis system comprising:

a dialyzer;

a blood pump;

a blood cassette operatively connected to the dialyzer and the blood pump;

a dialysate heater;

first and second peristaltic dialysate pumps; and

a dialysate cassette separate from the blood cassette, the dialysate cassette including an organizer configured to support a drain tube, a to-dialyzer tube and a from-dialyzer tube, the organizer further including internal connectors for supporting and orienting a first pumping tube, a second pumping tube and an inline fluid heating pathway, the internal connectors when mounted for operation orienting (i) the first pumping tube for operation with the first peristaltic dialysate pump, (ii) the second pumping tube for operation with the second peristaltic dialysate pump and (iii) the fluid heating pathway for operation with the dialysate heater.

17. The hemodialysis system of claim 16, wherein the organizer further orients at least one of (i) the to-dialyzer tube towards the dialyzer, (ii) the from-dialyzer tube towards the dialyzer and (iii) the drain tube towards a drain.

18. The hemodialysis system of claim 16, wherein the drain tube is in communication with a container that is initially a dialysate supply container.

19. A hemodialysis system comprising:

a dialyzer;

a blood pump;

a blood cassette operatively connected to the dialyzer and the blood pump;

a dialysate heater;

a dialysate source;

first and second peristaltic dialysate pumps; and

a dialysate cassette separate from the blood cassette, the dialysate cassette including an organizer configured to support a drain tube, a to-dialyzer tube and a from-dialyzer tube, the organizer further including internal connectors for supporting and orienting a first pumping tube, a second pumping tube and an inline fluid heating pathway, the organizer when mounted for operation orienting (i) the to-dialyzer tube towards the dialyzer, (ii) the from-dialyzer tube towards the dialyzer and (iii) the drain tube towards the dialysate source.

20. The hemodialysis system of claim 19, wherein the organizer when mounted for operation further orients (i) the first pumping tube for operation with the first peristaltic dialysate pump, (ii) the second pumping tube for operation with the second peristaltic dialysate pump and (iii) the fluid heating pathway for operation with the dialysate heater.