Medical fluid cassettes and related systems

• US 8,435,408 B2
• Filed: 02/21/2012
• Issued: 05/07/2013
• Est. Priority Date: 06/04/2002
• Status: Expired due to Term

• Current Assignee: Fresenius Medical Care Deutschland GmbH (Fresenius Medical Care AG)
• Original Assignee: Fresenius Medical Care Deutschland GmbH (Fresenius Medical Care AG)
• Inventors: Beden, Josef, Hahmann, Uwe, Herklotz, Martin, Lauer, Martin, Manke, Joachim, Scheunert, Peter, Weis, Manfred, Bongers, Alexander
• Primary Examiner(s): CECIL, TERRY K
• Application Number:
  US13/401,543
• Publication Number:
  US 20120156097A1
• Time in Patent Office: 441 Days
• Field of Search: 210/232, 210/239, 210/240, 210/416.1, 210/321.6, 417/477.2, 604/6.11
• US Class Current: 210/240
• CPC Class Codes: A61M 1/152 Details related to the interface between cassette and machine
• 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 1/15632 the filter being a dialyser
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1601 Control or regulation
• 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 1/3401 Cassettes therefor
• CPC Class Codes: A61M 1/3496 Plasmapheresis; Leucopheresis; Lymphopheresis A61M1/3472 takes precedence
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/362223 the interface being evacuated interfaces to enhance contact
• 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 1/362264 the filter being a blood filter
• CPC Class Codes: A61M 1/362265 Details of valves
• CPC Class Codes: A61M 1/367 Circuit parts not covered by the preceding subgroups of group A61M1/3621
• 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 2205/122 using evacuated interfaces to enhance contact
• CPC Class Codes: A61M 2205/126 with incorporated membrane filters
• CPC Class Codes: A61M 2205/128 : with incorporated valves
• CPC Class Codes: A61M 2205/3331 : Pressure; Flow
• CPC Class Codes: A61M 60/113 : in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/268 : the displacement member being flexible, e.g. membranes, diaphragms or bladders
• CPC Class Codes: A61M 60/37 : Haemodialysis, haemofiltration or diafiltration
• CPC Class Codes: A61M 60/427 : the force acting on the blood contacting member being hydraulic or pneumatic
• CPC Class Codes: A61M 60/43 : using vacuum at the blood pump, e.g. to accelerate filling
• CPC Class Codes: A61M 60/847 : arranged in a cassette

Abstract

The invention relates to an apparatus for the treatment of a medical liquid comprising a liquid treatment machine and a cassette insertable therein substantially made of a rigid base body of the cassette with fitted chambers and passages and a foil covering them.

Claims

1. A medical system, comprising:

a medical treatment machine defining a cassette compartment, the medical treatment machine comprising a plurality of piston pump members and valve members; and

a set of medical fluid cassettes, comprising

a first medical fluid cassette configured to be disposed within the cassette compartment of the medical treatment machine, the first medical fluid cassette comprising a cover foil attached to a base body, the cover foil and the base body cooperating to at least partially form a plurality of fluid channels and chambers, the medical system being configured to provide a first type of medical treatment when the first medical fluid cassette is disposed within the cassette compartment and the plurality of piston pump members and valve members of the medical treatment machine are operated in a first manner, at least one of the valve members of the medical treatment machine being aligned with a portion of the first medical fluid cassette that does not comprise a fluid channel or a chamber when the first medical fluid cassette is disposed within the cassette compartment; and

a second medical fluid cassette configured to be disposed within the cassette compartment of the medical treatment machine, the second medical fluid cassette comprising a cover foil attached to a base body, the cover foil and the base body cooperating to at least partially form a plurality of fluid channels and chambers, the medical system being configured to provide a second type of medical treatment that is different than the first type of medical treatment when the second medical fluid cassette is disposed within the cassette compartment and the plurality of piston pump members and valve members of the medical treatment machine are operated in a second manner that differs from the first manner,

wherein the configuration of the plurality of fluid channels and chambers of the first medical fluid cassette is different than the configuration of the plurality of fluid channels and chambers of the second medical fluid cassette, and the medical treatment machine has the same structural configuration when operated with the first medical fluid cassette to provide the first type of medical treatment as when operated with the second medical fluid cassette to provide the second type of medical treatment.

2. The medical system of claim 1, wherein the first cassette is configured for standard hemodialysis.

3. The medical system of claim 2, wherein the second cassette is configured for online hemodiafiltration.

4. The medical system of claim 1, wherein the set of medical fluid cassettes further comprises a third medical fluid cassette configured to be disposed within the cassette compartment of the medical treatment machine, the third medical fluid cassette forms a plurality of fluid channels and chambers, and the medical system is configured to provide a third type of medical treatment that is different than the first and second types of medical treatments when the third medical fluid cassette is disposed within the cassette compartment and the plurality of piston pump members and valve members of the medical treatment machine are operated in a third manner that differs from the first and second manners, and wherein the configuration of the plurality of fluid channels and chambers of the third medical fluid cassette is different than the configurations of the plurality of fluid channels and chambers of the first and second medical fluid cassettes, and the medical treatment machine has the same structural configuration when operated with the third medical fluid cassette to provide the third type of medical treatment as when operated with the first and second medical fluid cassettes to provide the first and second types of medical treatment, respectively.

5. The medical system of claim 4, wherein the first cassette is configured for standard hemodialysis, the second cassette is configured for online hemodiafiltration, and the third cassette is configured for acute dialysis.

6. The medical system of claim 1, wherein each of the cassettes includes a bar code thereon, and the medical treatment machine comprises a sensor system configured to identify the cassettes when the cassettes are disposed within the cassette compartment.

7. The medical system of claim 1, wherein the first and second medical fluid cassettes are configured to be interchangeably disposed within the cassette compartment of the medical treatment machine.

8. The medical system of claim 1, wherein the medical treatment machine is a dialysis machine.

9. The medical system of claim 1, wherein only some of the plurality of piston pump members and valve members of the medical treatment machine are operated to provide the first type of medical treatment.

10. The medical system of claim 9, wherein all of the plurality of piston pump members and valve members of the medical treatment machine are operated to provide the second type of medical treatment.

11. The medical system of claim 1, wherein the cover foil of at least one of the first and second medical fluid cassettes is welded to the base body along an edge region of the base body, and the at least one of the first and second cassettes comprises a region that contains substituate and is surrounded by a weld seam.

12. A set of medical fluid cassettes, comprising:

a first medical fluid cassette comprising a cover foil attached to a base body, the cover foil and the base body cooperating to at least partially form a plurality of fluid channels and chambers, the plurality of fluid channels and chambers of the first medical fluid cassette being configured so that the first medical fluid cassette can be used with a medical treatment machine to provide a first type of medical treatment;

a second medical fluid cassette comprising a cover foil attached to a base body, the cover foil and the base body cooperating to at least partially form a plurality of fluid channels and chambers, the plurality of fluid channels and chambers of the second medical fluid cassette being configured so that the second medical fluid cassette can be used with the medical treatment machine to provide a second type of medical treatment that is different than the first type of medical treatment,

wherein the configuration of the plurality of fluid channels and chambers of the first medical fluid cassette is different than the configuration of the plurality of fluid channels and chambers of the second medical fluid cassette, the first and second medical fluid cassettes are configured so that the medical treatment machine can have the same structural configuration when operated with the first medical fluid cassette to provide the first type of medical treatment as when operated with the second medical fluid cassette to provide the second type of medical treatment, and the plurality of fluid channels and chambers of the first medical fluid cassette are arranged such that at least one valve member of the medical treatment machine is aligned with a portion of the first medical fluid cassette that does not comprise a fluid channel or a chamber when the first medical fluid cassette is used with the medical treatment machine to provide the first type of medical treatment.

13. The set of medical fluid cassettes of claim 12, wherein the first cassette is configured for standard hemodialysis.

14. The set of medical fluid cassettes of claim 13, wherein the second cassette is configured for online hemodiafiltration.

15. The set of medical fluid cassettes of claim 12, further comprising a third medical fluid cassette forming a plurality of fluid channels and chambers, the plurality of fluid channels and chambers of the third medical fluid cassette being configured so that the third medical fluid cassette can be used with the medical treatment machine to provide a third type of medical treatment that is different than the first and second types of medical treatment, wherein the configuration of the plurality of fluid channels and chambers of the third medical fluid cassette is different than the configurations of the plurality of fluid channels and chambers of the first and second medical fluid cassettes, and the third medical fluid cassette is configured so that the medical treatment machine can have the same structural configuration when operated with the third medical fluid cassette to provide the third type of medical treatment as when operated with the first and second medical fluid cassettes to provide the first and second types of medical treatment, respectively.

16. The set of medical fluid cassettes of claim 15, wherein the first cassette is configured for standard hemodialysis, the second cassette is configured for online hemodiafiltration, and the third cassette is configured for acute dialysis.

17. The set of medical fluid cassettes of claim 12, wherein each of the cassettes includes a bar code thereon to identify the cassette.

18. The set of medical fluid cassettes of claim 12, wherein the first and second medical fluid cassettes are configured to be interchangeably disposed within a cassette compartment of the medical treatment machine.

19. The set of medical fluid cassettes of claim 12, wherein the cover foil of at least one of the first and second medical fluid cassettes is welded to a the base body along an edge region of the base body, and the at least one of the first and second cassettes comprises a region that contains substituate and is surrounded by a weld seam.