The most common etiology of pseudothrombocytopenia is platelet clumping induced by EDTA, which is the anticoagulant present in the purple tube in which blood is collected for a CBC. This clumping is ...
A 34-year-old woman (gravida 3, para 2) at 16 weeks’ gestation was found to have platelets unable to be quantified because of clumping on routine prenatal blood work, with a visual estimate of 40 ...