neonatal red blood cell count

The red blood cells of newborns are obviously high, and gradually decline after 2 weeks of birth. Men are the lowest at 6 to 7 years old and peak at 25 to 30 years old. Women reach the highest value when they are 13 to 15 years old, and maintain low levels when they are 21 to 35 years old, and then gradually increase, which is similar to the male level. The number of red blood cells in both sexes is significantly different between the ages of 15 and 40. It may be because males have higher levels of androgen during this period, which promotes protein synthesis and is beneficial to red blood cell hematopoiesis. Basic Information Specialist classification: growth and development examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: Do not eat too greasy, high-protein foods the day before the blood draw, avoid heavy drinking. Normal value Newborns (6.0 to 7.0) × 1012 / L (6 million to 7 million / mm3). Infants (5.2 to 7.0) × 1012 / L. Clinical significance Abnormal results: (1) Increase: 1 physiological changes in neonates, residents in high mountains, strenuous physical labor or sports, super-powered people. 2 pathological changes: A. Polycythemia (secondary or relative) a large number of dehydration caused by blood concentration (severe vomiting, frequent diarrhea, excessive sweating, polyuria, severe burns, long-term fasting), long-term hypoxia (purpuric congenital Heart disease, pulmonary heart disease, chronic mountain disease, severe emphysema, chronic carbon monoxide poisoning. B. Polycythemia vera. (2) Reduction: 1 physiological changes in the middle and late stages of pregnancy. 2 pathological changes: A. Hemorrhagic anemia visceral hemorrhage, hemophilia, thrombocytopenic purpura and the like. B. Hemolytic anemia congenital hemolytic anemia (thalassemia, faba bean disease, congenital non-spherical red blood cell anemia, congenital hemolytic jaundice, etc.), acquired anemia (autoimmune hemolytic anemia, neonatal hemolytic disease, array Primary sleepy hemoglobinuria, red blood cell debris syndrome, drug-induced hemolytic anemia quinine, quinidine, phenacetin, etc., toxic hemolytic anemia benzene, lead, arsenic, etc., infectious hemolytic anemia). C. Hematopoietic anemia, iron deficiency anemia, pernicious anemia, malnutrition anemia, aplastic anemia, etc. People who need to be examined have symptoms of anemia, such as people with heart palpitations and shortness of breath; people with familial anemia at home. Precautions Before inspection: 1, do not eat too greasy, high-protein food the day before the blood, to avoid heavy drinking. The alcohol content in the blood directly affects the test results. 2. After 8 pm on the day before the medical examination, you should start fasting for 12 hours to avoid affecting the test results. After inspection: 1. After blood is drawn, local compression is required at the pinhole for 3-5 minutes to stop bleeding. Note: Do not rub, so as not to cause subcutaneous hematoma. 2, the pressing time should be sufficient. There is a difference in clotting time for each person, and some people need a little longer to clotting. Therefore, when the surface of the skin appears to be bleeding, the compression is stopped immediately, and the blood may be infiltrated into the skin due to incomplete hemostasis. Therefore, the compression time is longer to completely stop bleeding. If there is a tendency to bleed, the compression time should be extended. 3. If there is localized congestion, use a warm towel after 24 hours to promote absorption. Inspection process The examination process: blood is drawn, blood is taken for examination, and venous blood is generally taken, and blood is drawn by a doctor or a nurse. The amount of blood drawn is determined according to the difference of the test content and the number of items. The blood volume is usually 2-20 ml, and the maximum is not more than 50 ml, and then the doctor performs calculation and examination. Not suitable for the crowd Have a coagulopathy such as hemophilia. Adverse reactions and risks Discomfort: There may be pain, swelling, tenderness, and visible subcutaneous ecchymosis at the puncture site.