High concentration white cells, a method for agglomeration of the high concentration and a bag set for use in conjunction therewith

A system for concentrating blood cells, comprising:

• a first bag for containing blood and an anticoagulant,
• a container, removably coupled to said first bag through a coupling system, for containing a red blood cell sedimentation reagent,
• a second bag removably coupled to said first bag through a coupling system for receiving from said first bag a first supernatant containing at least 80% of white blood cells contained in said first bag after said blood is mixed with said red blood cell sedimentation reagent, and after said first bag is centrifuged at a speed sufficient to obtain said first supernatant and a first sediment containing at least 90% of said red blood cells contained in said first bag,
• a third bag removably coupled to said second bag through a coupling system for receiving from said second bag all or a portion of a second supernatant contained in said second bag after said second bag is centrifuged at a speed sufficient to obtain a second supernatant and a second sediment, and
• a freezer bag removably coupled to said second bag through a coupling system for receiving from said second bag a resulting composition remaining after transfer of said all or a portion of said second supernatant to said third bag, said resulting composition including at least 80% of white blood cells contained in said blood and less than all of plasma contained in said blood.