Effect of solvent/detergent-treated pooled plasma on fibrinolysis in reconstituted whole blood

BACKGROUND Hyperfibrinolysis has been observed in patients heavily transfused with solvent/detergent-treated pooled plasma (S/D plasma). We compared coagulation and fibrinolytic variables in blood containing S/D plasma with blood containing fresh-frozen plasma (FFP), with and without α2-antiplasmin or tranexamic acid (TXA) supplementation. STUDY DESIGN AND METHODS Whole blood samples were reconstituted from red blood cells, platelet (PLT) concentrates, and varying mixtures of FFP and S/D plasma. Hematocrit and PLT count of reconstituted whole blood samples were varied. For a subset of runs, α2-antiplasmin or TXA was added to S/D plasma whole blood samples. Thromboelastography (TEG) analysis was performed to assess 50% clot lysis time (CLT50%), maximum amplitude (MA), and initial clotting time (R-time). RESULTS The change in CLT50% of whole blood as the plasma compartment transitions from FFP to S/D plasma was −52% (95% confidence interval [CI], −60% to −45%; p < 0.001). PLT count strengthened the effect, leading to an additional change in CLT50% of −8% (95% CI, −14% to −2%; p = 0.012) as PLT count increased from 10 × 109 to 150 × 109/L. MA and R-time were not associated with fraction of S/D plasma in whole blood. α2-Antiplasmin and TXA restored clot lysis time in S/D plasma whole blood. CONCLUSION Whole blood with S/D plasma has shorter clot lysis times in vitro compared to whole blood with FFP. α2-Antiplasmin and TXA restore clot lysis time of S/D plasma whole blood to that of FFP whole blood. Clinicians should be aware of the decreased clot lysis time associated with S/D plasma transfusion.