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What is blood?
Blood is a tissue made up of a series of elements with different characteristics and functions, which is why they are transfused separately to different patients. This enables more than ONE patient to benefit from a single blood donation.
Blood donations are fractionated to obtain three basic elements: red blood cell concentrates, platelet concentrates and plasma.

The components of blood
• Red blood cells (erythrocytes), carry oxygen from the lungs to all the tissues in the body. When there is a lack of red blood cells (anaemia), the vital organs do not receive enough oxygen. In this case, red blood cell concentrate must be given.
• Platelets play a role in blood clotting, and prevent secondary haemorrhaging of the small lesions that often occur in arteries, veins and capillaries. A lack of platelets (thrombocytopenia), which is common in patients with blood disorders (leukaemias) and after certain cancer treatments, causes the onset of serious haemorrhaging.The first-line treatment in these cases is transfusion of platelet concentrates.
• Plasma, which is the liquid part of blood and consists of water and proteins (coagulants, antibodies, albumin), used in many of the body's basic metabolic processes: blood clotting, immunity and carrying various substances and medicines. Plasma is used to make specific protein concentrates for treating various illnesses: haemophilia and other coagulation disorders, immunodeficiencies with the risk of multiple, serious infections, thrombosis, etc.

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