Platelet Count
500 Kshs | Home Collection Available
Synonyms
None
Purpose
The Platelet Count test is a blood test that measures the number of platelets (thrombocytes) circulating in the bloodstream. Platelets are essential for blood clotting and wound healing.
This test is important because it helps diagnose bleeding disorders, bone marrow diseases, or conditions that affect platelet production and destruction. Abnormal platelet levels can indicate issues such as thrombocytopenia, thrombocytosis, or bone marrow suppression.
The test can be done alongside Complete Blood Count (CBC), Peripheral Blood Smear, Coagulation Profile (PT, APTT, INR), Bone Marrow Biopsy, Liver Function Tests, and Autoimmune screening (e.g., ANA, anti-platelet antibodies).
Patient Preparation
There is no special preparation required for this test.
Samples
4 ml of whole blood should be collected in an EDTA tube (purple top). Samples should be mixed gently by inverting eight times immediately after collection. For proper mixing of blood with the EDTA. Samples should be refrigerated if sampling is not completed within 24 hours.
Reference Range
150 – 400 × 109/L
Results Turnaround
Within 24 hours after sample collection.
Diseases / Diagnostic Indicators
The Platelet Count Test provides important insights into several health conditions:
Low count (thrombocytopenia) may suggest:
- Bone marrow disorders (like leukemia or aplastic anemia)
- Autoimmune diseases (such as lupus or ITP)
- Viral infections (e.g., HIV, hepatitis)
- Side effects of medications or chemotherapy
- Severe bleeding or hemorrhage
- Dengue fever or other febrile illnesses
High count (thrombocytosis) may indicate:
- Inflammatory conditions (e.g., rheumatoid arthritis)
- Iron deficiency anemia
- Certain cancers (especially blood-related)
- Post-surgical recovery or infection
Normal platelet levels suggest that the bone marrow is functioning properly and there is no ongoing condition affecting platelet production or destruction.
This test is also used before blood transfusions to assess clotting ability and reduce the risk of complications, and during prenatal care to monitor platelet levels in expectant mothers, especially in cases of preeclampsia or other hematologic concerns. For more on Platelet Count testing, read this study.