Method for preparing a leukocyte preparation and leukocyte preparation

A leukocyte preparation comprising:

• leukocytes;
• erythrocytes;
• and
• thrombocytes;
• wherein the leukocyte preparation is produced according to a method comprising:
• obtaining a leukocyte fraction from whole blood;
• sedimenting the leukocyte fraction until a dividing line is formed between sedimented erythrocytes and a leukocyte supernatant, removing the leukocyte supernatant from the sediment, wherein the leukocyte supernatant is collected or remains in a leukocyte container;
• sedimenting the leukocytes in the leukocyte container, wherein a low-leukocyte supernatant is formed, and removing the low-leukocyte supernatant from the leukocyte container;
• washing the sediment in the leukocyte container with a saline solution, wherein the sedimented cells are resuspended in the saline solution, the solution is sedimented and a resulting supernatant is removed;
• resuspending the sediment in the leukocyte container in a storage solution;
• and
• storing the solution from the resuspending in a gas-permeable bag at a temperature between 20° C. and 25° C. for at least 48 hours;
• wherein the method modifies the leukocyte preparation to create a leukocyte preparation that is storable at a temperature between 2° C. and 38° C. for a period of 48 hours to 168 hours without substantial loss of function and respiratory burst and phagocytosis are more than 90 percent of a fresh version of the leukocyte preparation.