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Related Experiment Videos

[EDTA-induced pseudothrombocytopenia].

V Foresti1, E Parisio, M Tronci

  • 1Divisione medica III, Ospedale Fatebenefratelli e Oftalmico, Presidio multizonale ospedaliero dell'E.R.S.Z., U.S.S.L. 75/1, Milano.

Recenti Progressi in Medicina
|October 1, 1990
PubMed
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EDTA-induced pseudothrombocytopenia is a rare lab artifact caused by platelet clumping, not a true low platelet count. Re-evaluating blood smears and using citrate anticoagulant can prevent misdiagnosis.

Area of Science:

  • Hematology
  • Clinical Pathology
  • Immunology

Background:

  • EDTA-induced pseudothrombocytopenia is a rare laboratory artifact, occurring in approximately 1% of platelet counts.
  • It arises from in vitro platelet aggregation mediated by autoantibodies (IgG or IgM) against the GP IIb glycoprotein.
  • This artifact can mimic true thrombocytopenia, potentially leading to unnecessary diagnostic procedures and treatments.

Observation:

  • The study presents three cases of pseudothrombocytopenia.
  • One patient experienced a bone marrow biopsy and danazol treatment before the correct diagnosis was established.
  • Persistent low platelet counts without hemorrhagic symptoms prompted a review of peripheral blood smears.

Findings:

  • The re-examination of peripheral blood smears confirmed pseudothrombocytopenia as the cause of the low platelet count.

Related Experiment Videos

  • Morphological evaluation of platelets is crucial for accurate diagnosis.
  • Platelet counts performed on citrate-anticoagulated blood are essential for differentiating pseudothrombocytopenia from true thrombocytopenia.

    • Implications:

    • Accurate diagnosis of pseudothrombocytopenia avoids unnecessary invasive investigations and treatments.
    • Implementing specific diagnostic protocols, including morphological assessment and citrate-based platelet counts, is vital.
    • Early recognition of this artifact improves patient management and reduces healthcare costs.