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Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice
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Published on: April 2, 2013

Pseudothrombocytopenia associated with vasculitis

W M Boehme, T Mahmood, P Phanuphak

    The American Journal of the Medical Sciences
    |March 1, 1980
    PubMed

    A patient with pseudothrombocytopenia due to the anticoagulant EDTA is described. The thrombocytopenia was secondary to platelet agglutination and required the presence of EDTA in a critical concentration and the patient's plasma. Both homologous and autologous platelets were affected by this plasma factor in the presence of EDTA. The platelet agglutination was temperature independent and could be prevented by divalent cations. The agglutination phenomenon was irreversible. The platelet count in oxalate, not heparin, and citrate anticoagulated blood was normal. The patient's clinical course was benign and no hemorrhagic complications occurred. We believe this is the first reported case of pseudothrombocytopenia associated with a vasculitis. The diagnosis of this disorder, its implications and the pertinent literature is discussed.

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