
A Prospective Analysis of Viscoelastic Assays, Platelet Aggregometry, and Standard Laboratory Tests in Predicting Perioperative Blood Loss in Cardiac Surgery
This prospective observational study of 79 cardiac surgery patients evaluated whether viscoelastic testing (ROTEM), platelet aggregometry, or standard coagulation tests best predict perioperative bleeding. Clot firmness measured by FIBTEM A10 strongly correlated with blood loss using the Hb/kg Index, while platelet count, platelet aggregation, and conventional tests did not. A FIBTEM A10 cutoff of 12 mm accurately detected hypofibrinogenemia, supporting fibrinogen-focused transfusion strategies.








