System and method for treating whole blood

• US 20040069708A1
• Filed: 08/13/2003
• Published: 04/15/2004
• Est. Priority Date: 03/09/2001
• Status: Abandoned Application

• Current Assignee: ErySave AB
• Original Assignee: ErySave AB
• Inventors: Persson, Hans W, Laurell, Thomas, Allers, Mats, Jönsson, Henrik
• Application Number:
  US10/467,842
• Publication Number:
  US 20040069708A1
• Time in Patent Office: Days
• US Class Current: 210/646
• CPC Class Codes: A61M 1/3472 with treatment of the filtrate
• CPC Class Codes: A61M 1/3479 by dialysing the filtrate
• CPC Class Codes: A61M 1/3486 Biological, chemical treatment, e.g. chemical precipitation; treatment by absorbents
• CPC Class Codes: A61M 1/3496 Plasmapheresis; Leucopheresis; Lymphopheresis A61M1/3472 takes precedence
• CPC Class Codes: A61M 2205/3375 Acoustical, e.g. ultrasonic, measuring means

Abstract

The present invention relates to a method and an apparatus for treatment of whole blood comprising two steps, firstly, a step of extracorporeal preseparation whereby the whole blood is separated into a blood plasma rich component and a blood cell rich component and secondly, a step of collecting and/or treating the plasma rich component, e.g. performing dialysis, plasma donation or plasma-pheresis. In one embodiment of the invention, the blood plasma rich component is achieved after particle separation using an ultrasound separator comprising micro-channels formed in a plate structure.

Claims

1. A system for treatment of whole blood, comprising a separation apparatus (10,2200), a treatment apparatus (18) and fluid conduits (1, 15, 17, 19), wherein a first conduit (1) is arranged to transport blood to the separation apparatus (10,2200), characterized in that the separation apparatus (10,2200) comprises a an ultrasound microchannel separator, comprising a plate with a number of channel units formed in a layer of said plate near a first surface, and an ultrasound source arranged in close contact to a second surface, opposing the first surface, devised to separate blood cells from blood plasma, wherein the blood cell rich component is transported from the separation apparatus (10,2200) via a second conduit (12) and in that the blood plasma rich component is transported to the treatment apparatus (18) via a third conduit (19), and in that the treatment apparatus (18) is capable of treating the blood plasma rich component.

2. The system according to claim 1, characterized in that the separation apparatus (10,2200) further comprises;

a first inlet for inputting blood to the container;

possibly a second inlet for inputting possible substitution fluid to the container;

a first outlet for outputting a first blood product;

a second outlet for outputting a second blood product.

3. The system according to claim 2, characterized in that the liquid flow mechanism is arranged such that gravitation causes the liquid to flow through the standing ultrasound wave.

4. The system according to claim 3, characterized in that the microchannel separator comprises an integrated channel system, including an inlet (160), a base stem (110), a branching point (175) and two or more outlets (170, 180, 190) and oscillation means (53, 150) for delivering mechanical energy to the surroundings of, and fluid in, said channel;

arranged so that the concentration of particles in laminar layers of fluid in the base stem (110) changes the fluid flows towards the branching point; and

that said branching point (175) has a shape to separate said layers into separate branches.

5. The system according to any of the claims 1-4, characterized in that the blood cell rich component and the blood plasma rich component are united in a fourth conduit (5).

6. The system according to any of the claims 1-4, characterized in that the treatment apparatus (18) is a dialysis apparatus (18, 2300) arranged to remove breakdown products from the blood plasma rich component.

7. The system according to claim 6, characterized in that the dialysis apparatus (18, 2300) comprises a semi-permeable membrane.

8. The system according to claim 6, characterized in that the dialysis apparatus (2300) is a dialysis filter.

9. The system according to any of the claims 1-4, characterized in that the treatment apparatus (2) comprises a membrane (2300) for donor plasma and arranged to separate particles or proteins from blood plasma rich component.

10. The system according to any of the claims 1-4, characterized in that the treatment apparatus (2) is a treatment unit arranged to discard or destroy the blood plasma.

11. The system according any of the claims 1-4, characterized in that the treatment apparatus (2) is a treatment unit arranged to expose the blood plasma rich component to monoclonal antibodies.

12. A method for treatment of whole blood, comprising the steps of:

by means of a first conduit (10), supplying blood to a separation apparatus (1,2200);

by means of the separation apparatus (1,2200), extracorporeally preseparating blood cells from blood plasma;

by means of a second conduit (20), transporting the blood cell rich component from the separation apparatus (1,2200); and

by means of a third conduit (30) supplying the blood plasma rich component to a treatment apparatus (2).

13. The method as recited in claim 12, characterized in the step of:

separating the blood cells from the blood plasma by means of ultrasound.

14. The method as recited in claim 13, further comprising the steps of:

generating a standing ultrasonic wave in the blood such that particles of a first particle type having a first property dependent on the characteristics of the ultrasound is collected at the nodes of the standing ultrasound wave; and

establishing a flow of liquid through the standing ultrasound wave, the liquid carrying particles of a second particle type with a second property such that particles of said second particle type passes between said nodes.

15. The method as recited in claim 14, wherein said liquid is blood.

16. The method as recited in claim 14, wherein said liquid is a substitution fluid.

17. The method as recited in claim 14, further comprising the step of increasing the concentration of particles of said first particle type at the standing ultrasound wave by conducting the flow of particles of said first particle type through said ultrasound wave.

18. The method as recited in claim 14, further comprising the step of controlling the size of said first particle type dependent on the distance between the ultrasound transmitter and the reflector between which said standing ultrasound wave is generated.

19. The method as recited in claim 14, further comprising the step of controlling the size of said first particle type dependent on the ultrasound frequency at which said standing ultrasound wave is generated.

20. The method as recited in claim 14, further comprising the step of controlling the separation of particles of said first particle type from particles of a second particle type dependent on the acoustic properties of each particle type, respectively.

21. The method as recited in claim 14, further comprising the step of controlling the separation of particles of a first particle type from particles of a second particle type dependent on the density of each of the particles types, respectively.

22. The method as recited in claim 14, further comprising the steps of:

receiving blood in a container;

generating a standing ultrasound wave such that particles of a predetermined particle type is collected in the nodes of the standing wave;

possibly flowing a substitution liquid through the container;

removing the standing ultrasound wave;

emptying the container of particles of said predetermined particle type.

23. The method as recited in claim 14, using ultrasound in combination with laminar flow, and stationary wave effects further comprising the steps of

inputting fluid in a conduit forming an essentially laminar flow of a fluid containing particles;

subjecting said flow to an ultrasound stationary wave field during its flow past a distance, thereby forming a moderate essentially laminar flow with a non-uniform distribution of particles;

separating said moderated laminar flow into two or more separated flows in such a way that the concentration of particles is higher in one separated flow than in another separated flow;

collecting each separated flow for possible further processing.

24. The method according any of the claims 12-23, characterized in the step of:

bringing the blood cell rich component together with the blood plasma rich component in a fourth conduit (40).

25. The method according any of the claims 12-23, characterized in that the treatment apparatus (2) is a dialysis apparatus (2300) that removes breakdown products from the blood plasma rich component.

26. The method according any of the claims 12-23, characterized in that the treatment apparatus (2) is a membrane (2300) that separates particles or proteins from the blood plasma rich component.

27. The method according any of the claims 12-23, characterized in that the treatment apparatus (2) is a treatment unit that destroys or discards the blood plasma.

28. The method according any of the claims 12-23, characterized in that the treatment apparatus (2) is a treatment unit that exposes the blood plasma rich component to monoclonal antibodies.

29. A blood product produced through a method for treatment of whole blood comprising the steps of:

by means of a first conduit (10), supplying blood to a separation apparatus (1,2200);

by means of the separation apparatus (1,2200), extracorporeally preseparating blood cells from blood plasma;

by means of a second conduit (20), transporting the blood cell rich component from the separation apparatus (1,2200); and

by means of a third conduit (30) supplying the blood plasma rich component to a treatment apparatus (2).

30. The blood product as recited in claim 29, further comprising the step of:

separating the blood cells from the blood plasma by means of ultrasound.

31. The blood product as recited in claim 30 further produced from a first blood liquid and comprising the steps of:

generating a standing ultrasound wave through said first blood liquid such that particles of a first particle type having a first property depending of the characteristics of the ultrasound are collected at the nodes of the standing ultrasound wave;

establishing a flow of liquid through the standing ultrasound wave, the liquid carrying particles of a second particle type having a second property such that said particles of said particle type passes between said nodes.

32. The blood product as recited in claim 31, wherein said liquid is said first blood liquid.

33. The blood product as recited in claim 31, wherein said liquid is a substitution liquid.

34. The blood product as recited in claim 31, further comprising the step of increasing the concentration of particles of said first particle type at the standing ultrasound wave by flowing particles of said first particle type through said ultrasound wave.

35. The blood product as recited in claim 31, further comprising the step of controlling the size of said first particle type dependent on the distance of the ultrasound transmitter and the reflector between which said standing ultrasound wave is generated.

36. The blood product as recited in claim 31, further comprising the step of controlling the size of said first particle type dependent on the ultrasound frequency at which said standing ultrasound wave is generated.

37. The blood product as recited in claim 31, further comprising the step of controlling the separation of particles of said first particle type from particles of a second particle type dependent on the acoustic properties of each particle type, respectively.

38. The blood product as recited in claim 31, further comprising the step of controlling the separation of particles of said first particle type from particles of a second particle type dependent on the density of each of the particle types, respectively.

39. The blood product as recited in claim 31, further comprising the step of:

receiving blood in a container;

generating a standing ultrasound wave such as particles of a predetermined particle type are gathered in the nodes of the standing wave;

possibly flowing a substitution fluid through the container;

removing the standing ultrasound wave;

emptying the container of particles of said predetermined particle type.

40. The blood product as recited in claim 31, using ultrasound in combination with laminar flow and stationary wave effects, further comprising the steps of:

inputting fluid in a conduit forming an essentially laminar flow of a fluid containing particles;

subjecting said flow to an ultrasound stationary wave field during its flow past a distance, thereby forming a moderated essentially laminar flow with a non-uniform distribution of particles;

separating said moderated laminar flow to two or more separated flows in such a way that the concentration of particles is higher in one separated flow than in a another separated flow;

collecting each separated flow for possible further processing.

41. The blood product according any of the claims 31-40, produced by bringing the blood cell rich component together with the blood plasma rich component in a fourth conduit (40).

42. The blood product according any of the claims 31-40, produced by removing breakdown products from the blood plasma rich component by means of the treatment apparatus (2).

43. The blood product according any of the claims 31-40, produced by separating particles or proteins from the blood plasma rich component by means of the treatment apparatus (2).

44. The blood product according any of the claims 31-40, produced by destroying the blood plasma by means of the treatment apparatus (2).

45. The blood product according any of the claims 31-40, produced by exposing the blood plasma rich component to monoclonal antibodies by means of the treatment apparatus (2).