What is the normal value of red blood cells?

In life, we all know that red blood cells contain hemoglobin, and hemoglobin contains the trace element iron. Therefore, if there is too little hemoglobin, it will cause iron deficiency anemia. If the number of red blood cells in the human body decreases, it will cause anemia. If the number of red blood cells drops sharply, it may threaten human life and health. What is the normal value of red blood cells?

Normal reference value of red blood cells:

Male: 3.8 million to 6 million/mm3; Normal index: 4.0 to 5.5X1012 cells/liter.

Female: 3.8 million to 5.5 million/mm3; Normal index: 3.5 to 5.0X1012 cells/liter.

Newborn: 6-7 million/mm3; normal index: 6.0~7.0 × 10^12/12th power/liter.

What is the normal value of human red blood cells?

The reason why women have less than men is because of physiological bleeding. In addition, testosterone also has the function of stimulating erythropoietic hormone to produce red blood cells. Red blood cells are very small. There are 5 million red blood cells in 1 cubic millimeter of blood, and the number of red blood cells in the human body can reach 25 billion.

The number of red blood cells may change with external conditions and age. The rate in plateau residents and newborns can reach over 6 million/mm3. People who play sports or exercise regularly also have higher red blood cell counts. The hemoglobin content is 12-15g/100ml for men and 11-13g/100ml for women.

Clinical significance of red blood cell count test - diseases that may occur when abnormal values ​​are present:

1. Anemia – decreased red blood cell count

When the red blood cell count drops below 3.5 million for men and below 3 million for women, it is called anemia. In severe anemia, the face will turn pale, and symptoms such as cold hands and feet, palpitations, asthma, dizziness, etc. will occur. In more serious cases, it will cause symptoms such as heart failure and shock.

Anemia can be divided into three types: one is hypochromic microcytic anemia (iron deficiency anemia) caused by bleeding or insufficient iron in the diet; one is macrocytic anemia with swelling of the liver and spleen or jaundice (pernicious anemia); and the other is normocytic anemia (aplastic anemia, hemolytic anemia) in which red blood cells cannot be produced in the bone marrow or are destroyed, causing hemolysis. Among them, macrocytic and normocytic anemias rarely occur.

2. Plethorax – Increased red blood cells

A red blood cell count of more than 5.5 million is called plethora. In case of plethora of blood, symptoms such as facial flushing, dizziness, headache, and sweating may occur. People who are prone to dizziness and have high blood pressure are advised to have a red blood cell count check.

Understanding Hematocrit:

Hematocrit refers to the volume ratio of red blood cells in the blood. It is an important factor affecting blood viscosity. Blood viscosity increases rapidly with the increase of hematocrit, and decreases vice versa.

1. Normal value: Male: 0.42~0.47; Female: 0.39~0.40.

2. Significance of test results

① Increase: Blood concentration caused by various reasons, such as massive vomiting, diarrhea, large area of ​​burns with a large amount of wound exudate, etc., the hematocrit is measured to understand the degree of blood concentration, which can be used as the basis for the amount of fluid replacement. Polycythemia vera can sometimes be as high as 80%. Secondary polycythemia is a compensatory reaction caused by insufficient oxygen supply in the body, such as in newborns, mountain dwellers and chronic heart and lung diseases.

② Reduction: In various anemias or hemodilution, due to different types of anemia, the reduction in red blood cell count and hematocrit is not necessarily proportional. Therefore, the three average values ​​of red blood cells can be calculated based on the hematocrit and the amount of hemoglobin in the red blood cell count to help identify and classify anemia.