Storing platelets in an additive solution containing magnesium and potassium improves the functionality of the platelets, as measured by in vitro testing, and may allow a reduction of the amount of plasma required to be carried over to the final unit.
These in vitro studies suggest that the OrbiSac technique is equivalent to the standard manual method regarding the PLT in vitro characteristics during storage for 7 days. The results of standardizing the PLT count in PCs by selecting the BCs pools on the basis of the blood donor PLT concentration were encouraging.
The use of E-Sol 2 as a replacement for SAG-M does not significantly improve in vitro data after extended storage of WB at room temperature before preparation of blood components. However, after 8-h hold in vitro characteristics similar to or better than in fresh blood will be maintained for several weeks in E-Sol 2, a situation that makes E-Sol 2 superior to SAG-M when storage of WB is limited to 8 h. Some improvement was noted after 12-h hold as well.
Recovery and survival of PCs stored for 7 days decreased, but met suggested criteria. Analyzed in vitro parameters showed acceptable results. Randomized patient transfusion studies will provide additional verification of the suitability of 7-day storage of PLTs.
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