Membrane separation and washing devices, systems and methods employing same, and data management systems and methods

Patent metadata

Field	Value
Publication number	US-10130751-B2
Application number	US-201414560715-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	Mar 11, 2011
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A method of separating blood into two or more components and subsequently washing a component, comprising providing a blood storage container containing an initial blood composition, and a blood separation circuit comprising a separator. The method also comprises separating and washing cellular material within the same blood separation circuit.

First claim

The invention claimed is:

1. A method of separating an initial blood composition into two or more components and washing a component, comprising:
providing a blood storage container containing the initial blood composition;
providing a blood separation circuit comprising a separator including a pair of relatively rotating surfaces spaced apart to define a gap therebetween, at least one of the surfaces comprising a membrane that allows non-cellular material to pass therethrough and substantially prevents the passing of cellular material;
priming the blood separation circuit with at least one of a blood cell preservative, additive solution, wash media, and the initial blood composition flowing the initial blood composition from the blood storage container through the gap, to allow substantially all of the non-cellular material to pass through the membrane but not all of cellular material;
withdrawing cellular material from the gap to a red blood cell (RBC) container and retaining the cellular material in the RBC container;
flowing a first portion of additive solution from an additive solution container through the gap, withdrawing the first portion of additive solution from the gap and retaining the first portion of additive solution in the RBC container to produce a first mixture;
flowing a second portion of additive solution from the additive solution container through the gap, withdrawing the second portion of additive solution from the gap and retaining the second portion of additive solution in the blood storage container;
flowing at least a part of the first mixture from the RBC container to the additive solution container to produce a second mixture;
flowing at least a part of the second mixture from the additive solution container through the gap;
flowing a supernatant of the second mixture to a wash media bag, the second mixture comprising primarily non-cellular material and/or additive solution that has crossed the membrane, and flowing a remaining portion of the second mixture comprising substantially of purified cellular material from the gap to the RBC container; and
flowing at least part of the second portion of additive solution from the blood storage container through the gap, withdrawing at least a part of the second portion from the gap and retaining at least part of the second portion in the RBC container.

2. The method of claim 1 , wherein the initial blood composition is whole blood.

3. The method of claim 1 , wherein at least a portion of the non-cellular material is plasma.

4. The method of claim 1 , wherein the cellular material comprises primarily of red blood cells.

5. The method of claim 1 , wherein the additive solution is a non-chloride solution.

6. The method of claim 1 , wherein the initial blood composition is passed through a leukocyte reduction filter subsequent to passing through the separator.

7. The method of claim 4 , wherein the red blood cells retain more than 80% of initial 2,3-DPG levels after 28 days of storage.

8. The method of claim 4 , wherein the purified red blood cells possess a hematocrit of at least 80%.

9. The method of claim 4 , wherein the volume of purified red blood cells is 150-250 mL.

10. The method of claim 9 , wherein the second mixture comprises a volume of additive solution of 200 to 500 mL.

11. A method of separating whole blood into two or more components and subsequently washing one of the components, comprising the steps of:
providing a blood separation circuit comprising a wash media container, a plasma container, a red blood cell (RBC) container, an additive solution container, and a separator including a pair of relatively rotating surfaces spaced apart to define a gap therebetween, at least one of the surfaces comprising a membrane that allows non-cellular material to pass therethrough and substantially prevents the passing of cellular material;
providing a whole blood storage container containing whole blood;
priming the blood separation circuit with at least one of a blood cell preservative, additive solution, wash media, and the whole blood;
flowing the whole blood from the whole blood storage container through the gap, to allow substantially all of the non-cellular material to pass through the membrane except for a residual amount of cellular material;
withdrawing cellular material from the gap and combining the cellular material with a first portion of additive solution from the additive solution container to form a red blood cell (RBC) mixture;
flowing the RBC mixture through a leukocyte filter to the RBC container;
flowing a second portion of additive solution from the additive solution container through the gap to the RBC container to recover cellular material in the gap;
flowing a third portion of additive solution from the additive solution container through the gap to the whole blood container;
flowing the RBC mixture from the RBC container to the additive solution container to produce a second mixture;
flowing the second mixture from the additive solution container through the gap resulting in a supernatant of the second mixture to flow through the membrane and to a wash media bag, the supernatant comprising primarily non-cellular material and/or additive solution, and flowing a remaining portion of the second mixture comprising substantially of purified cellular material from the gap to the RBC container; and
flowing the third portion of additive solution from the whole blood storage container through the gap to the RBC container.

12. The method of claim 11 , wherein the cellular material comprises primarily of red blood cells.

13. The method of claim 12 , wherein the red blood cells retain more than 80% of initial 2,3-DPG levels after 28 days of storage.

14. The method of claim 12 , wherein the purified red blood cells possess a hematocrit of at least 80%.

15. The method of claim 12 , wherein the volume of purified red blood cells is 150-250 mL.

16. The method of claim 15 , wherein the second mixture comprises a volume of additive solution of 200 to 500 mL.

17. The method of claim 11 , wherein the third portion of additive solution container is flown from the additive solution container through the gap to the whole blood container.

18. The method of claim 11 , wherein in producing the second mixture, the RBC mixture bypasses the gap from the RBC container to the additive solution container.

19. The method of claim 11 , wherein the whole blood storage container is sterile docked to the circuit.

20. The method of claim 11 , wherein the whole blood container is integrally connected to the circuit.

Assignees

• Fenwal Inc

Inventors

• Radwanski Katherine N
• Kusters Benjamin E

Classifications

• A61M1/3496

  Plasmapheresis; Leucopheresis; Lymphopheresis (A61M1/3472 takes precedence) · CPC title

• A61M1/0209

  Multiple bag systems for separating or storing blood components · CPC title

• A61M1/3692 Primary

  Washing or rinsing blood or blood constituents · CPC title

• A61M2202/0429

  Red blood cells; Erythrocytes · CPC title

• A61M1/34

  Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration · CPC title