Platelets

The cells that help blood clot.

Platelets: small oval frosted glass tokens scattered on a dark surface
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A typical platelet count is 150–450 ×10⁹/L. Below is thrombocytopenia, above is thrombocytosis.

PLT (×10⁹/L)Meaning
<20Risk of spontaneous bleeding; urgent assessment
<50Bruising and bleeding tendency; tell your clinician before procedures
150–450Typical range
>450Thrombocytosis: mostly reactive (inflammation, iron deficiency)
Sources
  • Neunert C et al., ASH 2019 Guidelines for Immune Thrombocytopenia, Blood Adv 2019
  • Pagana KD et al., Mosby's Diagnostic and Laboratory Test Reference

General information only; not diagnosis or treatment. Review your results with your clinician.