Method and apparatus for preparation of solutions from concentrates

• US 5,344,392 A
• Filed: 09/28/1990
• Issued: 09/06/1994
• Est. Priority Date: 09/28/1990
• Status: Expired due to Term

• Current Assignee: Baxter International Inc., EMD Millipore Corporation (Merck & Co., Inc.)
• Original Assignee: Baxter International Inc.
• Inventors: Garcia, Ben, Deming, Laura, Kenley, Rodney, Witsoe, David, Bucchianeri, Richard, Senninger, Mark
• Primary Examiner(s): Lewis, Ralph
• Application Number:
  US07/590,420
• Time in Patent Office: 1,439 Days
• Field of Search: 604/4-6, 604/27-31, 210/85, 210/96.2, 210/101, 210/321.71, 210/647
• US Class Current: 604/4.01
• CPC Class Codes: A61M 1/1656 Apparatus for preparing dialysates
• CPC Class Codes: A61M 1/1668 Details of containers
• CPC Class Codes: A61M 1/287 Dialysates therefor
• CPC Class Codes: B01F 23/49 Mixing systems, i.e. flow charts or diagrams

Abstract

An apparatus for proportioning solutions from at least first and second constituent solutions connected to separate inlet ports of the apparatus first detects which constituent solution is being supplied to which port and then properly proportions the finished solution from the constituent solutions irrespective of which constituent solution is connected to which inlet port.

Claims

1. An apparatus for proportioning solutions from water and at least first and second concentrates comprising,

a. proportioning apparatus having at least first and second inlet ports;

b. means for supplying water to said apparatus;

c. at least one source of said first concentrate in fluid connection with said first inlet port and at least one source of said second concentrate in fluid connection with said second inlet port;

d. means for separately determining which concentrate is supplied to each of said inlet ports and adapting said apparatus to properly compound said solution according to predetermined parameters from said concentrates and said water irrespective of the particular inlet port to which each said concentrate is connected from said respective sources.

2. The apparatus of claim 1 wherein said determining means includes means for determining the conductivity of each of said concentrates entering each of said inlet ports.

3. The apparatus of claim 2 wherein said determining means further includes means for comparing said conductivities to predetermined conductivities.

4. The apparatus of claim 1 wherein said determining means includes means for determining the pH of each of said concentrates.

5. The apparatus of claim 4 wherein said determining means further includes means for comparing each said pH against to predetermined values for each pH.

6. An apparatus for proportioning finished solutions from at least first and second constituent solutions, said first constituent solution having a low conductivity and said second constituent solution having a high conductivity, said apparatus comprising,

a. a compounding apparatus having at least first and second inlet ports;

b. a first source of said first constituent solution in fluid connection with said first inlet port and a second source of said second constituent solution in fluid connection with said second inlet port;

d. means for separately detecting which solution is supplied to each of said inlet ports and adapting said machine to properly proportion said finished solution according to predetermined parameters from said first and second constituent solutions irrespective of the particular inlet port to which each is supplied from said respective sources.

7. The apparatus of claim 6 wherein said detecting means includes means for detecting the conductivity of each of said constituent solutions entering each of said inlet ports.

8. The apparatus of claim 7 wherein said detecting means includes means for comparing said conductivities to predetermined conductivities.

9. The apparatus of claim 6 wherein said detecting means includes means for detecting the pH of said constituent solutions.

10. The apparatus of claim 9 wherein said detecting means further includes means for comparing each said pH to predetermined values for each pH.

11. An apparatus for proportioning dialysis solutions from water and at least first and second concentrates comprising,

a. a proportioning machine having at least first and second inlet ports;

b. at least one source of water connected to said apparatus;

c. a least one source of said first concentrate in fluid connection with said first inlet port and at least one source of said second concentrate in fluid connection with said second inlet port;

d. means for separately detecting which concentrate is supplied to each of said inlet ports and adapting said apparatus to properly proportion said solution from said concentrates and said water irrespective of the particular inlet port to which each is connected from said respective sources,

12. The apparatus of claim 11 wherein said detecting means includes means for detecting the conductivity of each said concentrate entering each of said inlet ports.

13. The apparatus of claim 12 wherein said detecting means includes means for comparing said conductivities to predetermined conductivities.

14. The apparatus of claim 11 wherein said detecting means includes means for detecting the pH of concentrates entering each of said inlet ports.

15. The apparatus of claim 14 wherein said detecting means further includes means for comparing each said pH to predetermined values for each pH.

16. In a dialysis machine having multiple inlet ports and means for proportioning dialysis solutions from at least two concentrates and water supplied to different of said inlet ports, the improvement comprising in combination;

means for detecting which concentrate is supplied to each said inlet port and for automatically adapting said machine to properly proportion said solutions from said concentrates and said water regardless of which concentrate is supplied to which inlet port.

17. The dialysis machine of claim 16 wherein said detecting means includes means for separately detecting the conductivity of each said concentrate entering each of said inlet ports and comparing said conductivities to predetermined conductivities.

18. The dialysis machine of claim 17 wherein said detecting means includes means for separately determining the pH of each said concentrate entering each of said inlet ports and comparing each said pH to predetermined pH values.

19. A method for proportioning dialysis solutions from water and at least first and second concentrates comprising the steps of:

providing a source of water;

providing a source of first concentrate;

providing a source of second concentrate;

coupling the source of water to a water inlet of a proportioning apparatus that also includes at least first and second inlets;

coupling the first source of first concentrate to either the first inlet or the second inlet;

coupling the second source of second concentrate to the other inlet;

determining automatically which concentrate is coupled to which inlet; and

causing the proportioning apparatus to properly compound a solution, according to predetermined parameters, from the concentrates and the water irrespective of the inlet port to which the concentrates are connected.

20. The method of claim 19 including the step of determining the conductivity of each of the concentrates entering the inlet ports.

21. The method of claim 20 including the step of comparing the conductivities to predetermined conductivities.

22. The method of claim 19 including the step of determining the pH of each of the concentrates.

23. The method of claim 22 including the step of comparing the pH'"'"'s of each of the concentrates against predetermined values.

24. A method of providing dialysis to a patient comprising the steps of:

providing a dialysis machine having multiple inlet ports and means for proportioning dialysis solutions from at least two concentrates and water supplied to different of said inlet ports;

allowing the dialysis machine to automatically detect which of the at least two concentrates is supplied to each of the inlets; and

automatically adapting the machine to properly proportion the solutions from said concentrates and said water regardless of which concentrate is supplied to which inlet port.

25. A method of providing dialysis to a patient comprising the steps of:

providing a dialysis machine having multiple inlet ports and means for proportioning dialysis solutions from at least two concentrates and water supplied to different of said inlet ports;

allowing the patient to couple the at least two concentrates to either of at least two inlet ports;

allowing the dialysis machine to automatically detect which of the at least two concentrates is supplied to each of the inlet ports; and

automatically adapting the machine to properly proportion the solutions from said concentrates and said water regardless of which concentrate is supplied to which inlet port.