Blood transfusion is a procedure of administering full blood or specific blood components to correct their deficiencies in patient. Depending on indications and needs, it is possible to transfuse: Full blood, containing all of morphotic blood elements, including coagulation factors, Packed red blood cells, containing only red blood cells, Plasma, containing coagulation factors, antibodies and albumins,

Adrenal crisis (acute adrenal insufficiency) occurs in patients with chronic adrenal insufficiency (not diagnosed or not properly treated). Hormones produced by adrenal cortex (corticosteroids and mineralocorticoids) are responsible for, among others, physical and psychological stress response, water and sodium-calcium balance regulation, blood glucose control and arterial blood pressure.