Background and Aims: Inflammatory bowel disease (IBD) is associated with increased risk of thromboembolic events. The rotational thromboelastometry (ROTEM®) is a validated integrative assessment of coagulation, but it has never been studied in IBD patients.

Methods: We performed a monocentric prospective observational study in a national tertiary center. Adult IBD patients underwent ROTEM® analysis on admission to our IBD Department. Parameters evaluated with ROTEM® tests (INTEM, EXTEM and FIBTEM) were clotting time (CT), the time of clot formation (CFT), clot firmness amplitude after 5 and 10 minutes (A5 and A10) and maximum clot firmness (MCF). ROC curves were performed in order to evaluate the ability of ROTEM® to predict active IBD.

Results: Several ROTEM® parameters were significantly associated with active IBD compared to patients in remission, towards a hypercoagulable status for patients with active disease: CT, CFT, A5, A10, MCF. ROC analysis demonstrated that parameters related to clot robustness showed a very good prediction ability of active IBD (AUC >0.8): A5, A10, MCF in INTEM (p<0.001), in EXTEM (p<0.001) and MCF in FIBTEM (p<0.001). ROTEM® parameters showed high correlations with inflammation markers as C-reactive protein (CRP) and faecal calprotectin (FC).

Conclusions: Our study showed that ROTEM® parameters are modified in patients with active IBD, being correlating with inflammation markers and demonstrating a high prediction ability of active IBD. Future research is needed to validate ROTEM® as a method to discriminate patterns of active IBD and to guide anticoagulant therapy in patients with active IBD.


ROTEM®, thromboelastometry, inflammatory bowel disease, coagulation, Crohn’s disease, ulcerative colitis