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Molecules 2017, 22(4), 617;

Functional Assays in the Diagnosis of Heparin-Induced Thrombocytopenia: A Review

Department of Pharmacy, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for LIfe Sciences (NARILIS), University of Namur, Namur 5000, Belgium
CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), Hematology Laboratory, Université catholique de Louvain, Yvoir 5530, Belgium
Author to whom correspondence should be addressed.
Academic Editors: Giangiacomo Torri and Jawed Fareed
Received: 15 March 2017 / Revised: 5 April 2017 / Accepted: 8 April 2017 / Published: 11 April 2017
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A rapid and accurate diagnosis in patients with suspected heparin-induced thrombocytopenia (HIT) is essential for patient management but remains challenging. Current HIT diagnosis ideally relies on a combination of clinical information, immunoassay and functional assay results. Platelet activation assays or functional assays detect HIT antibodies that are more clinically significant. Several functional assays have been developed and evaluated in the literature. They differ in the activation endpoint studied; the technique or technology used; the platelet donor selection; the platelet suspension (washed platelets, platelet rich plasma or whole blood); the patient sample (serum or plasma); and the heparin used (type and concentrations). Inconsistencies in controls performed and associated results interpretation are common. Thresholds and performances are determined differently among papers. Functional assays suffer from interlaboratory variability. This lack of standardization limits the evaluation and the accessibility of functional assays in laboratories. In the present article, we review all the current activation endpoints, techniques and methodologies of functional assays developed for HIT diagnosis. View Full-Text
Keywords: heparin-induced thrombocytopenia; diagnosis; functional assay; platelets heparin-induced thrombocytopenia; diagnosis; functional assay; platelets

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Minet, V.; Dogné, J.-M.; Mullier, F. Functional Assays in the Diagnosis of Heparin-Induced Thrombocytopenia: A Review. Molecules 2017, 22, 617.

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