What can a blood test show?

Routine blood examination can be done by traditional microscope and electronic cell counter, and can detect the parameter 18-2 1. Besides the accidents of white blood cells, red blood cells, platelets and hemoglobin, it can also measure physical examination indexes such as hematocrit, average volume of red blood cells and average distribution concentration of blood cells. According to the changes of blood components, routine blood examination can preliminarily judge the existence of immune deficiency, traumatic infection, polycythemia vera, liver cirrhosis, active tuberculosis and other related diseases. As the most basic examination, routine blood examination cannot be used as the basis for the diagnosis of any disease. If you want to diagnose a specific disease, you must carry out more targeted examinations. Why do routine blood tests need an empty stomach? 1. Due to the different inspection methods used in each test, the normal values will be different. Normal data is obtained by measuring a large number of normal fasting blood. Because on an empty stomach, the body is in a basal metabolic state, which can be influenced by food and other factors, and its nature is relatively stable, which can fundamentally reflect the real situation of human blood. After many times of statistical analysis and processing of test results, the normal value of this test can be obtained. Therefore, female friends need to take fasting blood for routine blood examination, which is reliable, can truly reflect the actual situation of women, and can provide reliable and valuable basis for diseases. ""How much is the routine blood test? 2. After eating, food will be chewed by the mouth, digested and absorbed from the gastrointestinal tract into the blood, and then transported from the blood to various organs and tissues of the whole body. Therefore, some nutrients in food will enter the blood, which will increase the concentration of some components in the blood, so the test results may be inaccurate. 3. If a woman who has a blood test in the morning eats during menstruation, a large number of chylous particles produced after food digestion will be quickly absorbed into the blood, and the blood will become turbid at this time. This phenomenon is medically called "fatty blood". Because many blood biochemical tests need to be judged by the change of color, if the blood becomes turbid because of chyle particles, it will be difficult for inspectors to see clearly, which will eventually affect the test results. Therefore, drawing blood on an empty stomach can not be affected by foreign food, and can reflect the real physiological condition of women. In addition, on the day of routine blood examination, it is best to wear clothes with loose sleeves, so that venous blood can be quickly drawn. Of course, the sleeves must be clean to prevent infection.