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The Nijmegen Hemostasis Assay: Simultaneous Fluorogenic Measurement of Thrombin and Plasmin Generation in a Single Well
Published on: February 27, 2026
Antithrombin deficiency and its laboratory diagnosis
László Muszbek1, Zsuzsanna Bereczky, Bettina Kovács
1Clinical Research Center, University of Debrecen, Medical and Health Science Center, Debrecen, Hungary. muszbek@med.unideb.hu
Clinical Chemistry and Laboratory Medicine
|November 11, 2010
Summary
Antithrombin deficiency, a serious condition impacting blood clotting, is reviewed here. This summary covers its genetic basis, diagnosis, and classification for improved patient care.
Area of Science:
- Biochemistry
- Genetics
- Hematology
Background:
- Antithrombin (AT) is a crucial serpin regulating blood coagulation by inhibiting thrombin and factor Xa.
- AT deficiency is life-threatening, necessitating a thorough understanding of its structure and function.
- Glucosaminoglycans like heparin accelerate AT's inhibitory action through conformational changes.
Purpose of the Study:
- To provide a comprehensive overview of antithrombin (AT) structure, function, and regulation.
- To summarize the epidemiology, genetics, and classification of inherited and acquired AT deficiencies.
- To critically evaluate laboratory diagnostic methods and present a diagnostic algorithm for AT deficiency.
Main Methods:
- Literature review of antithrombin (AT) structure, function, and regulation.
- Summary of epidemiological data and molecular genetics of AT deficiency.
- Critical analysis of laboratory assay principles for AT deficiency diagnosis and classification.
Main Results:
- AT's role in coagulation and the mechanism of heparin-mediated inhibition are detailed.
- Epidemiology, genetic basis, and genotype-phenotype correlations of AT deficiency are presented.
- Classification of AT deficiencies and phenotypic differences are emphasized.
- Laboratory diagnostic tests, including functional assays, are critically reviewed with expected results for subtypes.
- A clinically oriented algorithm for diagnosing and classifying AT deficiency is provided.
Conclusions:
- Accurate classification and diagnosis of antithrombin (AT) deficiency are essential for effective thrombophilia management.
- Understanding the molecular basis and laboratory findings aids in distinguishing AT deficiency subtypes.
- The reviewed diagnostic algorithm can guide routine clinical practice for thrombophilia diagnosis.
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