Characterization of the Components and Functional Properties of a Plasma-Derived Fibrin Sealant

Background The activity and purity of Fibrin Sealant Grifols are described in this article. This fibrin sealant contains two components (fibrinogen and thrombin) that mimic the final stages of clotting. Fibrin sealants are primarily used as an adjunct to hemostasis for mild to moderate surgical bleeding in adults when standard surgical techniques are ineffective or impractical. Objective The aim of these studies was to assess the biochemical and functional characteristics of Fibrin Sealant Grifols. Methods Total protein, plasma protein impurities, and molecular forms were analyzed for both components. Clottable fibrinogen and thrombin activity were also measured. Both components were analyzed by SDS-PAGE and Western blot. The fibrin sealant clot was functionally characterized. Results The components had minimal contamination by other plasma proteins and no aggregates or degradation products. The fibrinogen component was almost completely clottable fibrinogen. The thrombin component contains albumin. The fibrinogen component formed a fibrin polymer and clots with tensile strength similar to literature values. The application device applied the components in a 1:1 volume ratio. Clotting time was ∼ 5 s when applied with the drip tip and nearly instantaneous when applied with the airless spray apparatus. Conclusion This fibrin sealant was shown to contain highly purified fibrinogen and thrombin delivered in a 1:1 volume ratio. These properties contribute to the clinical safety and efficacy of this product for many applications.