Objective: Thoracoabdominal aortic aneurysm operations are associated with extensive blood loss and high requirements for allogeneic blood product transfusion. We assessed the efficacy of intraoperative post-cardiopulmonary bypass administration of fibrinogen concentrate in elective thoracoabdominal aortic aneurysm surgery.
Methods: In a retrospective group (group A, n = 12) of patients undergoing elective thoracoabdominal aortic aneurysm surgery, clinically relevant diffuse bleeding after weaning from cardiopulmonary bypass was treated with allogeneic blood products (platelet concentrates, followed by fresh frozen plasma) according to a predetermined algorithm. In a prospective group (group F, n = 6) a first therapy step with fibrinogen concentrate was added to the algorithm. The dose of fibrinogen concentrate was estimated by using thromboelastometric data (ROTEM FIBTEM). Before each step of hemostatic therapy, blood loss in the range of 60 to 250 g per 5 minutes was confirmed.
Results: In group F, administration of 7.8 +/- 2.7 g of fibrinogen concentrate established hemostasis, completely avoiding intraoperative transfusion of fresh frozen plasma and platelet concentrates. Transfusion of blood products after cardiopulmonary bypass and during the 24 hours after surgical intervention was markedly lower in group F than in group A (2.5 vs 16.4 units; 4/6 patients in group F required no transfusion of blood products), as was 24-hour drainage volume (449 vs 1092 mL). Fibrinogen plasma levels, standard coagulation parameters, and hemoglobin and hematocrit values were comparable between the 2 groups on the first postoperative day.
Conclusions: FIBTEM-guided post-cardiopulmonary bypass administration of fibrinogen concentrate resulted in improved intraoperative management of coagulopathic bleeding in thoracoabdominal aortic aneurysm operations and reduced transfusion and 24-hour drainage volume.
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