What does the Platelet Count and Mean Platelet Volume test measure?

Why is Platelet Count and Mean Platelet Volume measured?

Platelet count quantification is essential across haematology, haematostasis, and pharmacological safety monitoring. Thrombocytopenia (<150 ×10³/µL) may indicate immune thrombocytopenic purpura, drug-induced thrombocytopenia, bone marrow failure, splenic sequestration, or consumptive coagulopathy (DIC, TTP, HUS) — each requiring distinct management. Thrombocytosis (>400 ×10³/µL) most commonly reflects reactive thrombocytosis from iron deficiency, infection, or post-splenectomy state, with essential thrombocythaemia a consideration when reactive causes are excluded and counts persistently exceed 600–800 ×10³/µL. MPV carries emerging cardiovascular prognostic significance — elevated MPV has been associated with increased platelet reactivity and higher risk of arterial thrombotic events including myocardial infarction.

Reference ranges

Standard reference

Platelets: 150–400 ×10³/µL; MPV: 7.5–12.5 fL # REVIEWER FLAG: Confirm Access Medical Laboratories reference ranges for platelet count and MPV — MPV reference intervals are analyser-platform-specific and not universally standardised. Confirm whether MPV is reported as a standard CBC component or requires separate order.

Functional medicine optimal

Platelets: 175–350 ×10³/µL (functional medicine cardiovascular optimal); MPV: 8.0–11.0 fL. # REVIEWER FLAG: MPV cardiovascular risk optimal is based on emerging literature and is not a standardised clinical guideline target — reviewer to confirm framing.

Units

Platelets: ×10³/µL, MPV: fL

Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.