A method of long-term preservation of blood in a condition suitable for transfusion is called blood conservation. Preservation makes it possible to transport the blood over long distances. For preservation solutions are used which contain chemical substances – stabilizers preventing coagulation, hemolysis of blood and reproduction of microbes and viruses. Stored blood is stored at low temperature in special vessels nonwettable.
Methods for preserving concentrated suspension of erythrocytes, leukocytes or platelets, plasma and drying by freezing it. Suspensions formed elements remain viable for several days (leukocytes), 30 days (red blood cells) to 11 ode (platelets) and multiple years (dried plasma).
When blood loss to maintain blood pressure in the blood and saline solutions are administered. For the same purpose can be transfused human blood serum of cattle, previously devoid of hazardous properties of foreign blood. This is called serum vidovonespetsificheskoy (VIS) (NG Belenky).
Blood transfusions are used in a large blood loss, accompanied by oxygen starvation, hemophilia, poisoning, burns, some diseases. Some received infusion of red blood cells die, and all blood transfused red blood cells die after 30-100 days, but immediately after the injection they are rapidly reduced respiratory function of blood.
Blood transfusion increases the number of red blood cells and hemoglobin, antibodies, especially if blood was taken from immunized donors, strengthens blood formation and for 10-12 days, increases blood clotting.
Preserved blood was poured into the vein, and if impossible, intravenous transfusion, – a major artery or bone marrow.
Recipients typically administered slowly (not more than 100 cm3 3min) 100-200 cm3. Rarely pour 500 cm3 – 1 dm3. Blood is taken on the average once a month: 450 cm3 in 350 cm3 of men and women (up to 8 times a year). Cottage blood is not only harmless, but also useful for health. Blood transfusion in Russia began in 1918, іn Russia, for the first time provides methods and placental transfusion of cadaveric blood introduced new ways of preserving its long, invented new anticoagulant agents (siiantrin and other stabilizers), studied the nature of complications from blood transfusions and developed measures to prevent them.