Abstract: A method for preparing a leukocyte preparation from a leukocyte fraction and a correspondingly prepared or obtainable leukocyte preparation and its use. The methods include: a) sedimenting the leukocyte fraction removing leukocyte supernatant from the sediment, wherein the leukocyte supernatant is collected or remains in a leukocyte container, b) sedimenting the leukocytes in the leukocyte container, c) washing the sediment in the leukocyte container with a saline solution, and d) resuspending the sediment in the leukocyte container in a storage solution.

Abstract: A method for preparing a leukocyte preparation from a leukocyte fraction and a correspondingly prepared or obtainable leukocyte preparation and its use. The method includes: a) sedimenting the leukocyte fraction removing leukocyte supernatant from the sediment, wherein the leukocyte supernatant is collected or remains in a leukocyte container, b) sedimenting the leukocytes in the leukocyte container, c) washing the sediment in the leukocyte container with a saline solution, and d) resuspending the sediment in the leukocyte container in a storage solution.

Abstract: The present invention relates to a method for treating blood composition disorders and blood function disorders. Said method comprises steps, in which blood or blood plasma of a patient is brought into extracorporeal contact with a second fluid (bioequivalent), wherein said second fluid is blood or modified blood, which comprises at least granulocytes, thrombocytes, and erythrocytes. Furthermore, the invention relates to devices for performing said method and to the use of such a device or blood or modified blood, which comprises granulocytes, thrombocytes, and erythrocytes, for treating blood composition disorders and blood function disorders.