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  • Title: Effect of prolonged storage on quality characteristics of recovered plasma: Is there an expiration date?
    Author: Politou M, Kontoteza IV, Pouliakis A, Dryllis G, Fortsa P, Valsami S, Stamoulis K.
    Journal: Transfusion; 2022 Nov; 62(11):2188-2193. PubMed ID: 36120965.
    Abstract:
    BACKGROUND: Although there are guidelines on industrial manufacture of plasma-derived medicinal products, there are no clear recommendations about plasma intended for fractionation, as there is no expiry time and the effect of prolonged storage on the activity of coagulation factors is unknown. STUDY AND DESIGN METHODS: A total of 237 units of plasma stored at -30°C in the National Blood Transfusion Centre for 1 year (62 units), 5 years (75 units), and 10 years (100 units) were studied. The effect of storage time was investigated by determining the activity of clotting factors FII, FV, FVII, FVIII, FIX, FX, FXI, FXII, FXIII using coagulometric methods and antithrombin III and fibrinogen with chromogenic assays, using System BCSR  > XP (Siemens Healthcare diagnostics Marburg, Germany). Albumin was measured by Medilyzer (BX, Medicon). ABO blood group was recorded and correlated with the levels of FVIII. Comparison of values between one and five, 1 and 10 and 5 and 10 years of storage was performed via the SAS for Windows 9.4 software platform (SAS Institute Inc., NC, U.S.A.). RESULTS: Albumin, AT III, fibrinogen, FIX, FXI, FXII, and FXIII remain rather stable even after 10 years of storage. Levels of FII, FV, FVII, FVIII, and FX decreased after 5 years of storage. DISCUSSION: Our study is in agreement with all the previous studies and concludes that there is a putative usability of recovered plasma and some of its coagulation factors after many years of storage at the recommended temperature.
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