Blood contains various types of cells. Each cell has a specific function to perform. Platelets, also known as PLTs, contribute to the blood’s ability to clot. A platelet count higher than 450,000 is referred to as a high platelet count. Treatment generally involves medical interventions.
A platelet, also known as a blood platelet, is a type of blood cell. Platelets are produced in the bone marrow. They play a critical role in facilitating various chemical reactions in the blood. In situations such as blood clotting, the healing of damage to blood vessels, and the recovery of wounds, platelets enable the immediate repair of trauma by transforming into different forms. This prevents blood loss and provides the necessary environment for the repair of damaged tissues.
Elevated Platelet Count
In cases of elevated platelet count, or thrombocytosis, the opposite of the conditions causing low platelet count is observed. Therefore, the presence of one of the following conditions is suspected:
Increased platelet production: Platelet levels rise, particularly due to elevated levels of hormones and chemical compounds involved in regulating blood cells, or in the presence of certain bone marrow tumors.
Decreased platelet destruction: In cases such as splenectomy—where the spleen, the primary site of platelet destruction, is removed—the lifespan of platelets is prolonged, and their concentration in the blood increases. Blood concentration: When the fluid volume of the blood decreases, a high platelet count may be observed on a complete blood count (CBC) report
. While elevated platelet levels can occur in healthy individuals, they may also signal various health problems. The causes of high platelet counts can be listed as follows:
Physiological overproduction: Certain genetic factors can increase platelet levels in some individuals.
Iron (Fe) deficiency: Since a decrease in iron levels results in a reduction in the number of red blood cells in the bone marrow, platelet levels also rise due to hormones that are released to accelerate production.
Bleeding: In cases of ongoing bleeding, red blood cell levels decrease, so production continues at a rapid pace. Consequently, platelet levels also rise in this situation.
Chronic conditions: Elevated platelet levels may be observed in chronic conditions with a rheumatological basis (inflammatory bowel diseases, inflammatory arthritis, etc.).
Low Platelet Count
Low platelet count can develop as a result of many different conditions. It can also occur in conditions directly related to platelets. Therefore, a decrease in platelet count can occur through two mechanisms. There are various underlying health issues associated with low platelet levels in the blood. The platelet count per unit of blood decreases in cases such as reduced platelet production, excessive platelet destruction, or blood that is thinner than normal. Certain medications used in conjunction with some medical conditions, dietary habits, or specific treatments may contribute to a decrease in platelet count.
What Causes Low Platelet Count?
When the platelet (plt) count is below normal, blood vessels become more prone to injury and bleeding; in cases of injury, significant blood loss occurs, wound healing is delayed, and blood clotting time is prolonged. The causes of low platelet count can be listed as follows:
Decreased platelet production: Platelets are produced in the bone marrow by megakaryocytes. The production of platelets, like that of other blood cells, is regulated by various hormones and biochemical mechanisms. Therefore, a problem in the bone marrow, pressure on platelet production within the bone marrow, or a decrease in the levels of regulatory hormones and biochemical mechanisms can impair platelet production, leading to a decrease in platelet count.
Increased platelet breakdown: Like other blood cells, platelets age and lose their function. They are broken down in various body structures, such as the spleen, and new ones are produced. In various medical conditions, this breakdown process accelerates, or platelets are broken down directly in the bloodstream or within tissues. Consequently, platelet counts decrease.
Blood dilution: When a complete blood count calculates the ratio of cells to blood plasma, an increase in the volume of blood plasma can result in a platelet count appearing lower than normal. The causes of low platelet count can be listed as follows:
Vitamin B12 or folic acid deficiency: The mechanism for blood cell production is disrupted, leading to a decrease in platelet count along with significant anemia.
Pregnancy: As platelet destruction increases and the blood’s fluid volume rises, the platelet count is determined to be low.
Side effects of medications: Certain medications can disrupt platelet production and cause thrombocytopenia.
Previous blood transfusions: Platelets may be destroyed due to antibodies developed during transfusions of blood from different donors.
Various viral infections: Various viruses, such as chickenpox, the Epstein-Barr virus, or HIV, can increase platelet destruction.
Alcohol consumption: Excessive alcohol consumption leads to a decrease in platelet count.
Chronic conditions: Chronic diseases affecting various bodily systems can reduce platelet count.
What Are the Symptoms of a High Platelet Count?
An elevated platelet count generally does not cause any specific clinical symptoms or complaints. It is usually discovered incidentally during a routine complete blood count (CBC) test. However, a significantly elevated platelet count may cause the following symptoms:
- Severe headache
- Vision problems
- Fatigue
- Pain and swelling in the hands and feet
- Itching
- Enlarged spleen
- Bleeding
Treatment for Low Platelet Count
Implementing a treatment plan for increases or decreases in platelet count begins with the proper diagnosis of the underlying condition. Therefore, a specialist doctor takes a detailed medical history from the patient and performs a physical examination. If necessary, imaging studies and additional blood tests may be ordered to confirm the diagnosis.
In cases of mild thrombocytopenia, the specialist may not recommend additional treatment; the patient may simply be monitored. Otherwise, a treatment plan is developed to address the underlying condition. In cases of thrombocytosis
, it may be important to determine whether the patient has an ongoing issue and to identify the underlying condition. Although the condition is generally monitored without treatment, in cases of significant increases in platelet count, medication or methods such as thrombophoresis—the removal of excess platelets from the blood—may be used.
