Laboratory tests for platelet disorders may include:

Assessing platelet number and size [MPV]

Assessing platelet morphology – blood film

Screening tests of platelet function e.g. Activated Clotting Time [ACT], Bleeding Time [BT] and PFA-100

Light Transmission Aggregometry e.g. classical Born aggregometry

Assessment of platelet nucleotides

Flow cytometry e.g. to quantitate the presence or absence of platelet membrane glycoproteins