Platelet (PLT) Count

How to Cite This Chapter: Don-Wauchope A, Chetty VT, Ivica J, Kavsak P, Khan WI, Lafreniere M, Nouri K, Solnica B. Platelet Count (PLT). McMaster Textbook of Internal Medicine. Kraków: Medycyna Praktyczna. Accessed May 26, 2024.
Last Updated: May 9, 2022
Last Reviewed: May 9, 2022
Chapter Information

For a brief introduction and guide to abbreviations, see Laboratory Tests: General Remarks.

Analyte [material]

Platelet count (PLT)

Reference range, target level, or decision threshold

150,000-450,000/microL (150-450 Giga/L)

Large platelets (>12 fL) <30%

Interpretation of results

↑ Causes of thrombocytosis: see Essential Thrombocythemia (ET)

↓ Causes of thrombocytopenia: see Platelet Disorders: General Considerations

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