What is the procedure to remove plasma from donated blood?

Plasmapheresis (plaz-mah-feh-REE-sis) is the removal of whole blood from the body and separation of the blood's cellular elements.The red blood cells and platelets are suspended in saline or a plasma substitute and returned to the circulatory system.For blood donors, this makes more frequent donations possible.Patients with certain autoimmune disorders receive their own red blood cells and platelets back cleansed of antibodies.