Serum Platelet Count (with Qualitative Evaluation of Platelet Morphology)

What Is Platelet Count Used For?

Platelet counts help diagnose conditions like thrombocytopenia (low platelet count), which can cause easy bruising or bleeding, or thrombocytosis (high platelet count), which may raise concerns about clotting risks. Evaluating platelet morphology can also help identify specific blood disorders, such as giant platelets or fragmented platelets that might suggest conditions like myeloproliferative disorders or certain cancers.

How Is This Test Performed?

A blood sample is drawn from a vein, typically in your arm. The sample is then analyzed under a microscope to count platelets and assess their appearance. This process is usually quick and painless, with minimal discomfort.

When Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like excessive bruising, prolonged bleeding, unexplained fatigue, or if you’re undergoing treatment for conditions that could affect platelet function, such as chemotherapy or certain medications.

Common Conditions Linked to Platelet Counts

Low platelet counts may be linked to conditions like autoimmune diseases, infections, or bone marrow disorders. High platelet counts could signal inflammation, certain cancers, or other underlying health issues that require further investigation.