1. REOLOGICAL PROPERTIES OF BLOOD

2. Reology Reology is the about the flowing of blood. Reology is a strong friction which arise in the case of fluids’ layers moving with the different speed. Blood is the fluid tissue of inner environment of body, which consists of plasma, formed elements and cells.

3. Physical and chemical properties of blood Quantity of blood in adults is 6-8 % - in newborns – 15 %

5. Physical and chemical properties of blood Density of blood in adult is 1,055-1,060 g/sм3, plasma – 1,025-1,034 g/sм3. In newborns density is higher, than in adult.

6. Viscosity of blood Viscosity of blood determine by resistance, which is present in the case of moving the layers of blood. In adult viscosity of blood is near 5, viscosity of plasma is 1,5-1,7. In newborns viscosity is higher, than in adult.

8. Hematocrit

9. Оsmotic pressure Оsmotic pressure determine by concentration of salts. It helps to support concentration of different substances on constant level. Hypertonic solution is solution with osmotic pressure higher than osmotic pressure in the cell. Hypotonic solution is solution with osmotic pressure less than osmotic pressure in the cell. Isotonic solution is solution with the same osmotic pressure that in the cell. Оsmotic pressure of blood is 285-310 мосm/l.

10. Factors, which determines rheological peculiarities of blood For plasma: viscosity, chemical substances, pH. For erythrocytes: possibility to deform, to aggregate.

12. Form elements, cells. Erythrocytes: in males is 4,0-5,1 Т/l, In females – 3,7-4,7 Т/l, In newborn is (5,9-6,7)10 12 /l or 5,9-6,7 Т/l. Leukocytes: in adult is (4-9)10 9 /l or 4-9 G/l, in newborn is (16,7-30,0)10 9 /l or 16,7-30,0 G/l. Platelets are the same in adult and children (180-320)10 9 /l or 180-320 G/l.

14. Proteins of plasma At norm it 65-85 g/l of proteins. In newborn it less concentration. Albumins is 35-50 g/l. In newborn it less concentration. Globulins are: α 1 globulins – 1-4 г/л α 2 globulins – 4-8 г/л β globulins – 6-12 г/л γ globulins – 8-16 г/л Concentration of γ globulins is higher in newborn. Fibrinogen is 2-4 g/l.

16. Erythrocytes speed sedimentation (ESS) Erythrocytes speed sedimentation in male is 2-10 mm per hour, in female is 2-15 mm per hour, in newborn is 1-2 mm per hour.

17. ESS

18. Factors, which determinate erythrocytes speed sedimentation 1. erythrocytes’: а) quantity of erythrocytes: in case of erythrocytes increase ESS decrease; б) size of erythrocytes: increase volume – increase ESS; в) hemoglobin: less quantity less ESS; г) electrical charge of erythrocytes: less of negative charge lead to increase of ESS. Plasma’: а) increase of globulins – increase ESS; б) increase of fibrinogen – increase ESS; в) increase of cholesterol increase ESS; г) increase of рН (>7.45) increase ESS.

19. Hemolysis of erythrocytes Hemolysis of erythrocytes is the process of breaking the erythrocytes and hemoglobin go out from erythrocytes. There are 2 kinds of erythrocytes: physiological and pathological. It can be osmotic, mechanical, termical, chemical, biological.

20. Period of blood poises in fetus 1. Extra embryo 2. Liver 3. Bone marrow

21. Role of vessels endothelium in support blood in the fluid condition 1. Smooth surface of vessels endothelium. 2. Negative charge of endotheliocytes and blood cells and that’s why they are push away. 3. Present on the vessels wall thin layer of fibrin which adsorb clotting factors, especially thrombin. 4. Constant presence in blood anticlotting factors in a small doses. 5. Producing by endothelium prostaciclins, which are powerful inhibitors of platelets aggregation. 6. Ability of endothelium to produce and fix antithrombin-III.

22. Thank you!