​What can a blood test check

Human blood can detect a variety of diseases. If human blood is dark red, it means there is inflammation in the human body, because the blood of a healthy person is bright red. Nowadays, doctors often ask patients to do blood tests before seeing them, and then determine the patient's specific condition based on the test results. Blood test is one of the testing methods. So what can a blood test check?

Generally speaking, the so-called big blood test refers to venous blood, and the small blood test refers to peripheral blood (blood from the finger). Drawing venous blood can detect many things, but it depends on what specific items you want to check. Peripheral blood test is generally a routine blood test, which can also reveal a lot. For example, the hemoglobin can show whether you are anemic, the platelets can show your coagulation function and can even screen out leukemia, and the white blood cells can show whether you have inflammation, colds, etc.

Blood tests can detect most conditions, the key is what you want to be tested for. For example, checking liver function can only show the condition of the liver. The deficiency of trace elements can be detected through blood tests.

If you are sick, you should first see a doctor and describe your condition in detail. The doctor will issue a test order based on the information you provide.

The blood test, namely the routine blood test, includes 19 sub-items, including: routine blood test, blood cell morphology examination, white blood cell classification, bone marrow cell analysis, blood cell chemical staining, chromosome karyotype examination, immunological examination, bone marrow pathological biopsy, related enzyme examination, etc. Routine blood tests can help patients detect and diagnose certain diseases early, such as diagnosing anemia, blood system diseases, and reflecting the hematopoietic function of the bone marrow.

Blood tests can detect many diseases. For example: Hepatitis B, leukemia, urethritis, etc. For girls, it can also be checked whether they have gynecological diseases or are pregnant.

Modern advanced equipment can measure a person's liver and kidney function, immune function, blood sugar level, cholesterol, blood lipid status, albumin and globulin ratio, sodium, potassium, chloride, calcium, magnesium and other electrolyte values, various hormone levels in the body, etc. with just a drop of blood. It can even detect whether cancer is already in the body. In the past, due to equipment limitations, a lot of blood had to be consumed to check the above data, so blood had to be drawn from veins or even arteries. With the continuous advancement of science, some developed countries can now complete various tests with just a drop of blood.