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Hematologic disorders in critically ill patients.

Kelly W Mercer1, B Gail Macik, Michael E Williams

  • 1Division of Hematology/Oncology, University of Virginia School of Medicine, Charlottesville, Virginia 22908, USA.

Seminars in Respiratory and Critical Care Medicine
|June 23, 2006
PubMed
Summary
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Critically ill patients often develop thrombocytopenia (low platelet count) and coagulopathies. Prompt diagnosis and treatment, especially for heparin-induced thrombocytopenia (HIT), are crucial for managing these hematologic disorders.

Area of Science:

  • Critical Care Medicine
  • Hematology
  • Pharmacology

Background:

  • Hematologic disorders, including thrombocytopenia and coagulopathies, are prevalent in intensive care units (ICUs).
  • Thrombocytopenia in critically ill patients can lead to adverse outcomes and requires thorough evaluation.
  • Heparin-induced thrombocytopenia (HIT) poses a significant risk of thrombosis and necessitates prompt recognition.

Purpose of the Study:

  • To outline the systematic evaluation of hematologic disorders in critically ill patients.
  • To emphasize the importance of recognizing heparin-induced thrombocytopenia (HIT) and its management.
  • To discuss coagulopathies, including vitamin K deficiency and disseminated intravascular coagulation (DIC), and emerging treatments.

Main Methods:

  • Systematic evaluation of clinical and laboratory findings for thrombocytopenia.

Related Experiment Videos

  • Interpretation of clotting studies to define coagulation defects.
  • Review of current understanding and treatment approaches for DIC and novel hemostatic agents.

    • Main Results:

    • Thrombocytopenia is common in ICUs and requires careful diagnosis to guide therapy.
    • Heparin-induced thrombocytopenia (HIT) mandates immediate cessation of heparin and consideration of direct thrombin inhibitors.
    • Coagulopathies, such as vitamin K deficiency and DIC, are frequent, with new treatments like recombinant activated protein C showing promise.

    Conclusions:

    • Effective management of hematologic disorders in the ICU hinges on accurate diagnosis and timely intervention.
    • Prompt recognition and management of HIT are critical to prevent thrombotic complications.
    • Advances in understanding DIC and the use of agents like recombinant factor VIIa offer potential therapeutic strategies, though further data are needed for off-label uses.