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  • Title: Storage of platelets in a novel additive solution (M-sol), which is prepared by mixing solutions approved for clinical use that are not especially for platelet storage.
    Author: Hirayama J, Azuma H, Fujihara M, Homma C, Yamamoto S, Ikeda H.
    Journal: Transfusion; 2007 Jun; 47(6):960-5. PubMed ID: 17524083.
    Abstract:
    BACKGROUND: To reduce adverse reactions due to platelet (PLT) transfusion, medical solutions on the market, such as saline and ACD-A, are used to replace the plasma of PLT concentrates in Japan; however, they are not strongly preservative. Here, an attempt was made to develop a novel additive solution (M-sol) having the ability to preserve PLTs stably, with only approved solutions for clinical use. STUDY DESIGN AND METHODS: M-sol is a mixture of solutions for medical use, which consists of 77 mmol per L NaCl, 3 mmol per L KCl, 1 mmol per L CaCl2, 21 mmol per L Na acetate, 15 mmol per L glucose, 9.4 mmol per L Na3 citrate, 4.8 mmol per L citric acid, 44 mmol per L NaHCO3, and 1.6 mmol per L MgSO4. The in vitro variables of PLTs stored in M-sol, Seto-sol, PASIIIM, or 100 percent plasma were compared during 14 days of storage. RESULTS: The in vitro parameters (pH, P-selectin, %hypotonic shock response, %disk, mean PLT volume, aggregability) of PLTs were better maintained in M-sol containing 3 percent plasma than in 100 percent plasma, PASIIIM with 31 percent plasma, and Seto-sol with 3 percent plasma during 14 days of storage. CONCLUSION: The 2-week storage of PLTs in M-sol is feasible in terms of the in vitro PLT function. Our results here show that the additive solution, with a high ability to preserve PLTs, can be prepared by mixing solutions approved for clinical use that are not specifically for PLT storage.
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