Simultaneous measurement of thrombin generation and fibrin formation in whole blood under flow conditions

Hilde Kelchtermans*, Leonie Pelkmans, Anne Bouwhuis, Evelien Schurgers, Theo Lindhout, Dana Huskens, Adam Miszta, H. Coenraad Hemker, Marcus D. Lancé, Bas De Laat

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Assays based on the formation of thrombin and fibrin are frequently used, and results are considered exchangeable in research/clinical settings. However, thrombin generation and fibrin formation do not always go hand in hand and flow profoundly influences thrombus formation. We describe the technical/clinical evaluation of an assay to simultaneously measure thrombin generation and fibrin formation under conditions of flow. Introduction of a fluorometer into a ‘cone and base principle’-based rheometer allowed the measurement of thrombin generation (using a thrombin-sensitive substrate) and fibrin formation (changes in viscosity), while applying a linear shear flow. Increasing shear rates inversely related with thrombin generation and fibrin formation. Increasing fibrinogen concentrations in defibrinated plasma resulted in increased thrombin generation and fibrin formation. In pre-operative samples of 70 patients undergoing cardiothoracic surgery, fibrin formation and thrombin generation parameters correlated with fibrinogen content, rotational thromboelastometry (ROTEM) and whole blood Calibrated Automated Thrombinography (CAT) parameters, respectively. Upon dividing patients into two groups based on the median clot strength, a significant difference in perioperative/total blood loss was established. In conclusion, we clinically evaluated a method capable of simultaneously measuring thrombin generation and fibrin formation in plasma/whole blood under continuous flow, rendering our method one step closer to physiology. Importantly, our test proved to be indicative for the amount of blood loss during/after cardiothoracic surgery.

Original languageEnglish
Pages (from-to)134-145
Number of pages12
JournalThrombosis and Haemostasis
Volume116
Issue number1
DOIs
Publication statusPublished - 1 Jul 2016

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