Finger blood is taken on an empty stomach or not.


Any change in the human body can be diagnosed with blood. Liquid tissue performs a huge number of functions: protects, nourishes, regulates metabolic processes and balance in the body, and also maintains a constant body temperature. No wonder it contains so much information!

Complete blood count is a necessary and indispensable procedure to which all are exposed. But at the same time, many people ask questions, is it necessary to donate blood from a finger on an empty stomach or not, can we ignore the advice of physicians? What does this diagnosis give and how reliable is it? Let's see.

Why and how to donate blood from a finger?

Why and how to donate blood from a finger

A hemogram is very important for diagnosing a person’s overall health. She is:

  • reflects information about leukocytes, erythrocytes and platelets, hemoglobin and sugar levels, as well as cholesterol content;
  • identifies inflammatory processes of various kinds.

Not only adults take blood from a finger on an empty stomach - children, even the smallest, also fall under this rule, and parents must follow this. The result of the analysis will not be reliable if you eat before the procedure. The fact is that only the morning, "hungry" blood can provide the most accurate information about the human condition.

If the hemogram is done after breakfast, even a tiny amount of food changes the formula of capillary blood, increases the number of colorless cells and reduces the amount of red pigment. The overall picture is distorted, and the analysis will have to be redone. Otherwise, the doctor either diagnoses a non-existent disease, or will not be able to identify a real ailment. Therefore, complete blood count is done on an empty stomach, is of paramount importance.

What does capillary blood show?

Why take blood from a finger, which shows a general analysis? The results contain brief information about the number of its components. And, if you know their norms, you can easily "read" your analyzes.

Hemoglobin is associated with many diseases. In women, it should be 13 r%, in men - 14.5 r%. The lack of red respiratory pigment is observed in anemia and blood loss. An overabundance of this substance may mean:

  • erythremia
  • erythrocytosis
  • excessive blood viscosity.

Why take blood from a finger

Red blood cells are blood cells that contain hemoglobin. In men, 1 µl of their blood should be between 4,000,000 and 5,000,000; in women, 3,700,000-47,000,000. If the content of red blood cells is higher, this means an excess of hemoglobin with all the ensuing consequences. Reducing the number of red blood cells can talk about the disruption of the bone marrow and such illnesses as:

  • leukemia
  • myeloma
  • metastases substandard formations.

Leukocytes destroy bacteria, dead cells and create antibodies to resist diseases. The work of these colorless cells is very important, and therefore a change in their number is always the object of close attention. Their number should vary from 4 to 9 thousand in 1 μl - this is the norm for both men and women. Pathological increase of leukocytes indicates inflammation, acute and chronic infections, poisoning, lack of oxygen, allergies, malignant tumors, blood diseases. If there are less leukocytes than needed, then this is leukopenia.

Blood clotting is determined by the duration of bleeding and the formation of a blood clot. Discharge from the cut should not last more than 1-4 minutes, and a clot with normal indicators is formed within 6-10 minutes.

Blood practically does not change its composition - in a healthy person, the hemogram is always the same. But it is important that the tests give up correctly. The question of how blood is donated - on an empty stomach or not - should not arise, because neglect of this rule gives the wrong picture, depriving the study of its diagnostic value.