DIALYSIS SYSTEMS AND RELATED COMPONENTS

• US 20090101566A1
• Filed: 09/19/2008
• Published: 04/23/2009
• Est. Priority Date: 09/19/2007
• Status: Active Grant

• Current Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Original Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Inventors: Lindley, Deloy, Crnkovich, Martin Joseph, Jensen, Melvin D., Reihanifam, Mohsen, Jensen, Lynn E., Weaver, Colin
• Granted Patent: US 8,110,104 B2
• Time in Patent Office: Days
• US Class Current: 210/249
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• 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 1/36226 Constructional details of cassettes, e.g. specific details on material or shape
• 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 1/3639 Blood pressure control, pressure transducers specially adapted therefor
• CPC Class Codes: A61M 1/3641 Pressure isolators
• 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 2209/082 Mounting brackets, arm supports for equipment
• CPC Class Codes: Y10T 137/6851 With casing, support, protector or static constructional installations

Abstract

A cassette is described for holding circuit components used with a hemodialysis machine.

Claims

1. A hemodialysis system, comprising:

a main body;

a door that can be closed relative to the main body so that an interior surface of the door is adjacent to a surface of the main body;

a member that extends from the interior surface of the door; and

a first sensor on the main body, the member being adjacent to the first sensor when the door is closed, and the door and the main body being arranged so that a device retaining a hemodialysis component can be disposed between the door and the main body when the door is closed.

2. The system of claim 1, wherein the member is configured to press the hemodialysis component against the first sensor when the door is closed.

3. The system of claim 1, wherein the hemodialysis component comprises a capsule with a flexible diaphragm.

4. The system of claim 1, wherein the hemodialysis component comprises an air release chamber.

5. The system of claim 1, wherein the hemodialysis component comprises tubing.

6. The system of claim 1, wherein the member is adapted to be displaced relative to the interior surface of the door.

7. The system of claim 1, wherein the member is a spring loaded member.

8. The system of claim 1, wherein the first sensor is a pressure transducer.

9. The system of claim 8, wherein the device retains tubing, a capsule with a membrane, and an air release chamber.

10. The system of claim 9, wherein the door is configured to retain the device against the main body when the door is closed and to apply a pressure to the capsule allowing the pressure transducer to determine a fluid pressure through the membrane.

11. The system of claim 8, further comprising a second sensor in the form of an optical sensor on the main body, the second sensor being positioned adjacent to an air release chamber retained by the device when the device is disposed between the door and the main body and the door is closed.

12. The system of claim 1, wherein the main body further comprises a pump.

13. The system of claim 12, wherein the pump is configured so that tubing extending from the device retaining the hemodialysis component can be automatically loaded onto the pump.

14. The system of claim 12, wherein the main body has a recessed portion adjacent to the pump, the recessed portion being configured to receive the device retaining the dialysis component when the device retaining the hemodialysis component is disposed between the door and the main body and the door is closed.

15. The system of claim 14, wherein the pump is arranged such that tubing extending from the device retaining the hemodialysis component can be operably coupled to the pump when the cassette is received within the recessed portion of the main body.

16. A device for retaining hemodialysis circuit components, the device comprising:

a body having a first portion and a second portion adjacent to the first portion, the first portion having a plurality of recesses configured to retain tubes and a first aperture that intersects at least one of the recesses, the second portion having a first slot along a top edge of the second portion and a second slot along a side edge of the second portion, the first and second slots being arranged to allow the body to capture a dialyzer.

17. The device of claim 16, wherein the device is configured so that the device can be disposed between a door and a main body of a dialysis machine when the door is closed.

18. The device of claim 16, wherein the at least one of the recesses intersected by the aperture is a substantially linear recess.

19. The device of claim 16, wherein the first portion of the body is recessed relative to the second portion of the body.

20. The device of claim 16, further comprising at least one guide projecting from a back surface of the body, wherein the guide has a straight wall.

21. The device of claim 20, wherein the straight wall of the guide is adjacent to the first portion of the body.

22. The device of claim 16, wherein the recesses are semicircular recesses.

23. The device of claim 16, further comprising a second aperture between two linear recesses.

24. The device of claim 23, wherein:

the first aperture is circular;

the second aperture is rectangular; and

the cassette further comprises an aperture with a tapered region, wherein the aperture with the tapered region is closer to an upper edge of the device, the second aperture is closer to a lower edge of the device and the first aperture is between the second aperture and the aperture with the tapered region.

25. The device of claim 16, further comprising a tube trap on the body.

26. The device of claim 25, further comprising a hook configured to position a tube on the body.

27. The device of claim 16, further comprising a slot extending from an edge of the device into the recessed portion.

28. The device of claim 16, further comprising a tubing lock adjacent to at least one of the plurality of recesses.

29. The device of claim 28, wherein the tubing lock comprises two adjacent projections.

30. The device of claim 16, further comprising:

an aperture with crossbars; and

a chamber lock adjacent to the crossbar.

31. The device of claim 16, wherein the aperture includes a portion with two parallel walls and a tapered portion.

32. The device of claim 31, wherein adjacent to the aperture is a stabilizer that extends parallel to the crossbar and to opposite sides of the recessed portion of the body.

33. An assembly comprising:

the device of claim 16; and

a dialyzer held by the slot along the top edge of the second portion of the body and by the slot along the side edge of the second portion of the body.

34. The assembly of claim 33, wherein the dialyzer includes a fitting, the fitting including a tab that engages the body to lock the dialyzer against the body.

35. An assembly comprising:

the device of claim 16, wherein the body forms a loop adaptor recess and the portion of the body forming the loop adaptor recess has an aperture; and

a loop adaptor disposed in the loop adaptor recess, wherein the loop adaptor includes a locking pin disposed in the aperture in the portion of the body forming the loop adaptor recess.

36. The assembly of claim 35, wherein:

the device includes a trap adjacent to the loop adaptor recess; and

the loop adaptor is held by the trap.

37. The assembly of claim 35, further comprising:

a plurality of tubes, wherein each tube is in a recess of the plurality of recesses;

a capsule in fluid communication with a tube of the plurality of tubes; and

an air release chamber in fluid communication with a tube of the plurality of tubes.

38. The assembly of claim 37, further comprising a dialyzer in fluid communication with a tube of the plurality of tubes.

39. A hemodialysis circuit component kit, comprising:

a cassette including;

a body forming a loop adaptor recess, a portion of the body forming the loop adaptor recess having an aperture,

the body having a first portion and a second portion adjacent to the first portion, the first portion having a plurality of recesses configured to retain tubes, wherein a first aperture intersects at least one of the recesses, the second portion having a first slot along a top edge of the second portion and a second slot along a side edge of the second portion, the first and second slots being arranged to allow the body to capture a dialyzer;

a loop adaptor in the loop adaptor recess of the body, wherein the loop adaptor includes a locking pin disposed in the aperture in the portion of the body forming the loop adaptor recess;

a plurality of tubes, wherein each tube is in a recess of the plurality of recesses;

a capsule in fluid communication with a tube of the plurality of tubes; and

an air release chamber in fluid communication with a tube of the plurality of tubes.

40. The kit of claims 39, further comprising a dialyzer in fluid communication with a tube of the plurality of tubes.

41. The kit of claim 40, further comprising a port caps, wherein the port caps are sized to fit onto end ports of the dialyzer.

42. The kit of claim 39, further comprising a waste bag, wherein a waste bag can be connected to a tube of the plurality of tubes.

43. A device for retaining hemodialysis components, the device comprising:

a body forming a recessed region and an aperture that intersects the recessed region, the recessed region being configured to retain a blood line, the aperture being configured to receive a hemodialysis component that is in fluid communication with the blood line, the body further forming a slot configured to receive and retain a fitting of a dialyzer.

44. The device of claim 43, wherein the hemodialysis component is an air release chamber.

45. The device of claim 43, wherein the hemodialysis component is a capsule with a flexible membrane.

46. The device of claim 43, wherein the body, the blood line, and the hemodialysis component are configured to be disposed between a main body and a door of a hemodialysis machine.