WEIGHT/SENSOR-CONTROLLED SORBENT SYSTEM FOR HEMODIALYSIS

• US 20110303590A1
• Filed: 08/19/2011
• Published: 12/15/2011
• Est. Priority Date: 07/19/2002
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Inventors: Childers, Robert W., Brown, David S., Wariar, Ramesh, Karoor, Sujatha, Din, Shahid, Martis, Leo, Buchmann, Cody, Soltys, Paul
• Granted Patent: US 8,597,227 B2
• Time in Patent Office: Days
• US Class Current: 210/96.2
• 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 1/153 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 1/1565 Details of valves
• CPC Class Codes: A61M 1/159 specially adapted for peritoneal dialysis
• CPC Class Codes: A61M 1/1656 Apparatus for preparing dialysates
• CPC Class Codes: A61M 1/1658 Degasification
• CPC Class Codes: A61M 1/166 Heating for sterilisation A61M1/1686
• 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 1/284 Continuous flow peritoneal dialysis [CFPD]
• CPC Class Codes: A61M 1/285 Catheters therefor
• CPC Class Codes: A61M 1/287 Dialysates therefor
• CPC Class Codes: A61M 1/288 Priming priming in extracorporeal blood circuits A61M1/3643
• CPC Class Codes: A61M 2202/0413 Blood
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/3327 Measuring

Abstract

A hemodialysis system including (i) a dialyzer; (ii) a blood circuit including a blood pump in fluid communication with the dialyzer; (iii) a dialysate circuit including a dialysate circulation pump in fluid communication with the dialyzer, the dialysate circuit further including a sorbent cartridge for cleaning used dialysate; (iv) a container holding an initial supply of dialysate; (v) a container pump in fluid communication with the dialysate circuit and the container; (vi) a supply of concentrate; and (vii) an electronic weight balance positioned and arranged to weigh the supply of concentrate.

Claims

1. A hemodialysis system comprising:

a dialyzer;

a blood circuit including a blood pump in fluid communication with the dialyzer;

a dialysate circuit including a dialysate circulation pump in fluid communication with the dialyzer, the dialysate circuit further including a sorbent cartridge for cleaning used dialysate;

a container holding an initial supply of dialysate;

a container pump in fluid communication with the dialysate circuit and the container;

a supply of concentrate; and

an electronic weight balance positioned and arranged to weigh the supply of concentrate.

2. The hemodialysis system of claim 1, wherein the container doubles as an ultrafiltration collection container.

3. The hemodialysis system of claim 1, wherein the electronic weight balance is positioned and arranged to weigh both the concentrate supply and the container.

4. The hemodialysis system of claim 1, wherein the container pump is also positioned and arranged to pump concentrate from the concentrate supply to the dialysate circuit.

5. The hemodialysis system of claim 1, wherein the dialysate circuit includes at least one sensor for sensing a toxin level of dialysate flowing through the dialysate circuit.

6. The hemodialysis system of claim 5, wherein an output from the sensor is used to control a rate of reconstitution from the supply of concentrate.

7. The hemodialysis system of claim 1, wherein the dialysate circuit is vented.

8. The hemodialysis system of claim 7, wherein the dialysate circuit is vented at the sorbent cartridge.

9. A hemodialysis system comprising:

a dialyzer;

a blood circuit including a blood pump in fluid communication with the dialyzer;

a dialysate circuit including a dialysate circulation pump in fluid communication with the dialyzer, the dialysate circuit further including a sorbent cartridge for cleaning used dialysate;

a dialysate reservoir;

a reservoir pump in fluid communication with the dialysate circuit and the reservoir;

a supply of concentrate for reconstituting dialysate in the dialysate circuit; and

which is configured to electronically weigh the dialysate reservoir and the supply of concentrate.

10. The hemodialysis system of claim 9, wherein the dialysate reservoir holds an initial batch of dialysate.

11. The hemodialysis system of claim 9, wherein the dialysate reservoir and the supply of concentrate are weighed by a same electronic balance.

12. A hemodialysis system comprising:

a dialyzer;

a blood circuit including a blood pump in fluid communication with the dialyzer;

a dialysate circuit including a dialysate circulation pump in fluid communication with the dialyzer, the dialysate circuit further including a sorbent cartridge for cleaning used dialysate;

a container holding an initial supply of dialysate;

a container pump in fluid communication with the dialysate circuit and the container; and

wherein the container holding the initial supply of dialysate is used later to collect ultrafiltration removed from a patient using the system.

13. The hemodialysis system of claim 12, wherein the container pump is positioned and arranged to pump the initial supply of dialysate, and which includes a second pump positioned and arranged to pump ultrafiltration to the container.

14. The hemodialysis system of claim 12, which includes a valve configured to selectively allow dialysate removed from the dialyzer to be directed to the sorbent cartridge or to the container as ultrafiltration.

15. The hemodialysis system of claim 12, which includes a first valve positioned between the dialyzer and the container pump and a second valve positioned between the container pump and the sorbent cartridge.

16. The hemodialysis system of claim 12, which includes a check valve positioned and arranged to prevent regenerated dialysate exiting the sorbent cartridge from reentering the sorbent cartridge.

17. The hemodialysis system of claim 12, which includes a sensor positioned and arranged in the blood circuit for preventing air from being delivered to the patient.

18. The hemodialysis system of claim 12, which includes a sensor positioned and arranged to monitor regenerated dialysate exiting the sorbent cartridge.

19. The hemodialysis system of claim 12, which includes a sensor positioned and arranged to monitor an efficiency of the system in removing toxins.

20. The hemodialysis system of claim 12, which includes a concentrate supply in fluid communication with the dialysate circuit and a sensor positioned and arranged so that its output can be used to control a rate of flow from the concentrate supply.