Plateletcrit (PCT)

What is Plateletcrit?

Plateletcrit (PCT) measures the percentage of blood volume occupied by platelets, calculated by multiplying platelet count by mean platelet volume. This parameter provides information about the total platelet mass in circulation and helps assess overall platelet function and production adequacy.

Why is it Tested?

Doctors order plateletcrit as part of a complete blood count to evaluate bleeding disorders, assess thrombotic risk, and monitor platelet function. It provides additional information beyond platelet count alone, particularly useful when platelet size varies significantly or when assessing overall hemostatic capacity.

Normal Ranges

Reference ranges vary by lab, but general adult guidelines:

Adults: 0.22–0.24%

Normal plateletcrit values indicate adequate platelet mass for proper blood clotting and hemostatic function.

Reference ranges vary by authority. Track yours across multiple standards with automatic unit conversions in LabsVault.

What do Abnormal Results Mean?

Abnormal results are not a diagnosis. Always discuss your results with a qualified healthcare provider before making any medical decisions.

Low Plateletcrit

Low plateletcrit may indicate:

Thrombocytopenia (low platelet count)
Small platelets with reduced function
Bone marrow disorders affecting platelet production
Increased platelet destruction or consumption
Dilutional effects from fluid overload

High Plateletcrit

Elevated plateletcrit may indicate:

Thrombocytosis (high platelet count)
Large platelets (often younger, more active)
Myeloproliferative disorders
Essential thrombocythemia
Reactive thrombocytosis
Risk for thrombotic complications

How to Track Over Time

Tracking plateletcrit helps monitor bleeding disorders and thrombotic risk, particularly in patients with platelet count abnormalities. Changes in plateletcrit can indicate evolving platelet production or destruction patterns, helping guide treatment decisions and assess bleeding or clotting risk over time.

Plateletcrit