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The Nijmegen Hemostasis Assay: Simultaneous Fluorogenic Measurement of Thrombin and Plasmin Generation in a Single Well
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Laboratory tests for antithrombin deficiency.

Bernard Khor1, Elizabeth M Van Cott

  • 1Department of Pathology, Massachusetts General Hospital, Boston MA, USA.

American Journal of Hematology
|November 26, 2010
PubMed
Summary
This summary is machine-generated.

Hereditary antithrombin deficiency increases venous thrombosis risk. This review details testing to confirm or exclude hereditary deficiency when antithrombin activity is low, considering acquired causes and false results.

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Area of Science:

  • Hematology
  • Coagulation Disorders
  • Thrombosis

Background:

  • Hereditary antithrombin deficiency is a genetic condition causing hypercoagulability and increased venous thrombosis risk.
  • Acquired antithrombin deficiency is more prevalent than hereditary forms.
  • Accurate diagnosis is crucial for appropriate patient management.

Purpose of the Study:

  • To outline diagnostic steps for confirming or excluding hereditary antithrombin deficiency.
  • To discuss the advantages and disadvantages of different antithrombin activity assays.
  • To identify potential causes of falsely normal assay results, including direct thrombin inhibitors.

Main Methods:

  • Review of diagnostic strategies for antithrombin deficiency.
  • Analysis of antithrombin activity assay options.
  • Discussion of differential diagnosis between hereditary and acquired deficiency.

Main Results:

  • The recommended initial test for antithrombin is an activity (functional) assay.
  • Acquired causes of low antithrombin activity are common and must be considered.
  • Direct thrombin inhibitors can lead to falsely normal antithrombin activity results.

Conclusions:

  • A systematic approach is necessary to differentiate hereditary antithrombin deficiency from acquired causes.
  • Understanding various testing methods and potential pitfalls is essential for accurate diagnosis.
  • Proper identification of hereditary antithrombin deficiency impacts long-term patient care and thrombosis risk management.