Platelet Count Blood Test
A platelet count blood test is done to check the number of platelets in the blood. This test is done as a part of a complete blood count test to screen various conditions that interfere with blood clotting.
Why is the Platelet Count blood test Prescribed?
A doctor may prescribe the platelet count test
To help diagnose various viral infection
- To monitor or diagnose various conditions that cause too much bleeding or clotting.
- Diagnose certain platelet diseases
- To check for any bleeding disorders before surgery
- To check platelet function in surgeries that have an increased risk of bleeding
- To monitor patients who are taking blood thinners
- In patients with prolonged bleeding after a minor cut or injury, Nosebleeds, red spots on the skin(petechiae), Purple spots on the skin (purpura), bruising on the skin, heavy menstrual bleeding.
- In patients with numbness of hands and feet, dizziness, headache, weakness.
A platelet count test measures the number of platelets in the blood.
- A low platelet count indicates thrombocytopenia, which causes too much bleeding after minor or major injury.
- A high platelet count is called thrombocytosis, which causes blood clotting that can block blood flow.
Procedure and prerequisites
A blood sample is taken from the vein in the arm using a small needle. There is no need to fast if one is going only for a platelet count test, but if other blood tests are also recommended, the patient needs to fast as the doctor guides.
Reference range
150,000 to 450,000 platelets per microliter of blood
- More than 450,000 platelets are known as thrombocytosis
- less than 150,000 platelets are known as thrombocytopenia
These values are for theoretical reference and may vary from laboratory to laboratory.