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Thrombocytes, blood cell platelet count

Thrombocytes, or platelets, are vital to the functioning of the blood clotting system.


  • Thrombocytes are one type of blood cells in addition to white and red blood cells.
  • Thrombocytes are important for blood clotting. 
  • Quantity of platelets can be affected by viruses and bacteria, alcohol consumption, and liver diseases.
  • Thrombocytes are part of the blood count.

What are thrombocytes?

Thrombocytes, or platelets, are central to the functioning of the blood clotting system. Platelets are produced in the bone marrow. Platelets are stored in the spleen and live for about 10 days, after which they are replaced by new platelets.

Platelets, together with other blood clotting factors, react to bleeding and initiate the blood clotting process. Platelets can also repair small damage to the blood vessels.

Thrombocytes are part of the blood count.

Reference values for thrombocytes

Platelet reference values for adults:

Men: 145 – 348 xE9/L
Women: 165 – 387 xE9/L

Reference levels may vary depending on the laboratory and the test analysis method.

Low platelet count (thrombocytopenia)

A person with thrombocytopenia, or a low platelet count, is susceptible to bleeding. This condition may cause unusually heavy or frequent nosebleeds, bleeding from the gums, spontaneous bruising or increased menstrual bleeding. However, only a significant drop in the platelet count (below 50 x E9/l) results in such symptoms.

If a person uses medicinal products that affect platelet function (such as aspirin), abnormal bleeding may occur even with less severe thrombocytopenia.

Platelets may decrease for a number of reasons

Most common causes are:

Mild, asymptomatic, and temporary thrombocytopenia does not require further tests or treatment. However, it is important to investigate the cause of a markedly decreased or prolonged low platelet count.

High platelet count (thrombocytosis)

Thrombocytosis is a condition in which there are too many platelets in the blood. Platelet count can increase due to various factors that do not constitute an actual disease. Platelet count may increase, for example, in case of sudden bleeding and inflammation.

High platelet count usually does not cause any symptoms. 

Platelet count may be elevated for reasons such as:

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