Platelet Count
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Measures the number of platelets (thrombocytes) in the blood
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🧪 What is the Platelet Count Test?
The Platelet Count measures the number of platelets (thrombocytes) in the blood. Platelets are small blood cells essential for blood clotting and preventing excessive bleeding.
❓ Why is the Test Done?
To:
- Evaluate bleeding or clotting disorders
- Investigate causes of unexplained bruising, bleeding, or petechiae
- Monitor patients with thrombocytopenia or thrombocytosis
- Assess bone marrow function
- Monitor effects of medications (e.g., chemotherapy, heparin)
📊 Normal Range
Age Group | Normal Platelet Count |
|---|---|
Adults | 150,000 – 450,000 / µL (150–450 x10³/µL) |
Children | Slightly higher but generally similar range |
📈 Interpretation of Results
Platelet Count | Possible Causes / Conditions |
|---|---|
Low Platelets (<150,000) | Thrombocytopenia due to infections, bone marrow disorders, autoimmune diseases (ITP), medications, hypersplenism, DIC |
Normal Platelets | Healthy range |
High Platelets (>450,000) | Thrombocytosis due to inflammation, iron deficiency, myeloproliferative disorders, post-splenectomy, malignancy |
🧠 Associated Organs & Systems
System/Organ | Conditions |
|---|---|
Bone marrow | Aplastic anemia, leukemia, myelodysplastic syndrome |
Immune system | Immune thrombocytopenic purpura (ITP), lupus |
Spleen | Hypersplenism causing sequestration |
Liver | Cirrhosis, portal hypertension |
🔄 Related / Follow-Up Tests
- Peripheral Blood Smear – morphology of platelets
- Coagulation Profile (PT, aPTT) – clotting function
- Bone Marrow Biopsy – if marrow pathology suspected
- Immune markers – ANA, anti-platelet antibodies
- Complete Blood Count (CBC) – overall hematologic status
✅ Fasting Required?
Test | Fasting Required |
|---|---|
Platelet Count | ❌ No |
📝 Summary Table
Parameter | Details |
|---|---|
What | Measures number of platelets in the blood |
Why | Evaluate bleeding/clotting disorders, bone marrow health |
Normal Range | 150,000 – 450,000 / µL |
Low Count | Infection, marrow failure, autoimmune disease |
High Count | Inflammation, myeloproliferative disease, iron deficiency |
Associated Organs | Bone marrow, spleen, immune system |
Follow-up Tests | PBS, coagulation studies, bone marrow biopsy |
Fasting Required | ❌ No |
How our test process works!
