Platelet count - blood

Last updated: Saturday, 01, May, 2004

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Item Process
Specimen

5 mL blood in EDTA tube.

2 mL blood in special paediatric EDTA tube.

Method

Part of FBC.

Electronic counts on automated and semi-automated instruments.

Manual (microscopy) counts are not accurate.

Reference Interval

150-400 x 109/L.

Application

History of excessive and/or inappropriate bleeding, bruising; purpura.

Monitoring drugs with potential or predictable bone marrow toxicity.

Monitoring heparin therapy.

Post-splenectomy monitoring.

Possible myeloproliferative disorder.

Interpretation

See Thrombocytopenia and Thrombocytosis.

Reference

Dacie JV and Lewis SM. Practical Haematology. 8th ed. Churchill Livingstone 1995.