Normal composition of peripheral blood in children of different ages
The normal composition of peripheral blood in children of different ages is presented in Table 1.
In the first month of life in the blood of a newborn there is still a lot of fetal hemoglobin (HbF). In preterm patients, the level of fetal hemoglobin can be 80-90%. By the time the baby is born, the content of adult hemoglobin (HbA) is significantly increased, and its level continues to increase intensively within just 1 month of the child's life, and the HbF concentration sharply decreases. By 3-4 months in the norm of HbF in the blood of the child is absent.
The color index in the first 2 to 3 weeks of the child's life is slightly greater than one (up to 1.3), at 2 months it is equal to unity, and then decreases to normal values for adults (0.85-1.15).
The rate of erythrocyte sedimentation (ESR) depends on many physical and chemical properties of the blood. In newborns, it is 2 mm / h, in infants 4-8, in older 4-10, in adults 5-8 mm / h. The slower sedimentation of red blood cells in newborns is due to the low content of fibrinogen and cholesterol in the blood, as well as the thickening of the blood .
In the first days of the child's life, neutrophilic leukocytosis is observed with a shift to the left, this is explained by the ingestion of the mother's hormones through the placenta into the body of the child through the placenta, blood coagulation during the first hours of life, resorption of interstitial hemorrhages, absorption of the child's disintegration products due to inadequate food intake in the first days of life .
Tab.1
Normal composition of peripheral blood in children of different ages
| Age | Level of Hb, g / l | The number of erythrocytes 10 ^ 12 / l | Fluctuations in the number of leukocytes 10 ^ 9 / l | Neutrophils,% | Eosinophils,% | Basophils,% | Lymphocytes,% | Monocytes,% | Platelets, 10 ^ 11 / L |
| Novelized 2 weeks 1 month 6 months 1 year 2 years 4 years 4 - 8 years 8- 14 years old |
215
180 156 123 119 118 126 128 128 |
5.7 5.1 4.7 4.6 4.6 4.0 4.0 4.2 4,5 |
10 - 30 9 - 12 9 - 12 9 - 12 9 - 12 7.1 to 15 6.5 - 13 5 - 12 4.5-11 |
53 - 82 18 - 46 18 - 46 18 - 46 26-50 26-50 26-50 40-50 60-70 |
0.6 1.5-6.5 1.5-6.5 1.5-6.5 15 15 15 15 15 |
0 - 4 0 - 2 0 - 2 0 - 2 0 - 1 0 - 1 0 - 1 0 - 1 0 - 1 |
5 - 56 22 - 69 22 - 69 22 - 69 52-64 52 - 64 52-64 34-48 28-42 |
15 - 34 8.5 - 28 8.5 - 28 8.5 - 28 16 16 16 16 16 |
2.69 2.04 2.04 2.04 2 - 3 2 - 3 2 - 3 2.5-4 2.5-4 |
- Norms of tests for children
- General blood analysis. Properties of blood. Formed elements of blood.
- The most important biochemical parameters of blood in children
- Hematocrit size and erythrocytometric parameters in healthy children of various ages
- Myelogram of healthy children
- General blood analysis. Blood plasma. Biochemical indicators.
- Analysis of urine. Common properties of urine.
- Normal values of daily diuresis
- Causes of discoloration of urine
- Normal values of the density of urine
- Norms for excretion of nitrogen-containing substances in urine
- Normal values of inorganic components in urine
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