Medizinische Universität Graz - Research portal
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SHR Neuro Cancer Cardio Lipid Metab Microb
Halbmayer, WM; Weigel, G; Quehenberger, P; Tomasits, J; Haushofer, AC; Aspoeck, G; Loacker, L; Schnapka-Koepf, M; Goebel, G; Griesmacher, A.
Interference of the new oral anticoagulant dabigatran with frequently used coagulation tests.
Clin Chem Lab Med. 2012; 50(9): 1601-1605.
Doi: 10.1515/cclm-2011-0888
Web of Science
PubMed
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- Co-authors Med Uni Graz
- Haushofer Alexander
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- Abstract:
- Background: Dabigatran etexilate is a new oral anticoagulant for the therapy and prophylaxis of venous thromboembolism and stroke prevention in patients with atrial fibrillation. To investigate the extent of interactions of this new anticoagulant with frequently used coagulation assays, we completed a multicenter in vitro trial with Conformite Europeenne(CE)-labeled dabigatran-spiked plasma samples. Methods: Lyophilized plasma samples with dabigatran concentrations ranging from 0.00 to 0.48 mu g/mL were sent to the coagulation laboratories of six major Austrian hospitals for evaluation. Coagulation assays were performed under routine conditions using standard reagents and analyzer. Results: Dabigatran led to a dose-dependent prolongation of the clotting times in coagulometric tests and influenced the majority of the parameters measured. Statistically significant interference could be observed with the prothrombin time (PT), activated partial thromboplastin time (aPTT) and PT/aPTT-based assays (extrinsic/intrinsic factors, APC-resistance test) as well as lupus anticoagulant testing. Even non-clotting tests, such as the colorimetric factor XIII activity assay and to a minor extent the amidolytic antithrombin activity assay (via factor IIa) were affected. Conclusions: This multicenter trial confirms and also adds to existing data, demonstrating that laboratories should expect to observe strong interferences of coagulation tests with increasing concentrations of dabigatran. This finding might become particularly important in the elderly and in patients with renal impairment as well as patients whose blood is drawn at peak levels of dabigatran.
- Find related publications in this database (using NLM MeSH Indexing)
- Anticoagulants - chemistry Anticoagulants - therapeutic use
- Benzimidazoles - chemistry Benzimidazoles - therapeutic use
- Blood Coagulation Tests -
- Colorimetry -
- Factor XIII - chemistry Factor XIII - metabolism
- Humans -
- Partial Thromboplastin Time -
- Prothrombin - chemistry Prothrombin - metabolism
- Prothrombin Time -
- Pyridines - chemistry Pyridines - therapeutic use
- Stroke - prevention and control
- Venous Thromboembolism - drug therapy
- Find related publications in this database (Keywords)
- coagulation tests
- dabigatran
- interference
- misinterpretation
- new oral anticoagulants