Platelet indices

Last updated: Saturday, 01, May, 2004
Item Process
Specimen

5 mL blood in EDTA tube.

2 mL blood in special paediatric EDTA.

Method

Part of FBC, calculated by many automated instruments: mean platelet volume (MPV); platelet distribution width (PDW); and plateletcrit (PCT).

Reference Interval

Varies with instrument - consult pathologist.

Application

Quantitative assessment of platelet size and volume is of limited value in distinguishing between reactive thrombocytosis and essential thrombocythaemia.

Interpretation

Quantitative assessment of the degree of variation in platelet size and volume.

Reference

Van der Lelie J and Von dem Borne AEG. J Clin Pathol 1986; 39: 129-133.