Abstract
To examine the appropriateness of the Food and Drug Administration's 10-year storage time for previously frozen red cells, 24-hour posttransfusion survival studies were performed, and the half-life of 3 units of autologous red cells that had been stored for 13.5, 14, and 17 years, respectively, was measured. The units had acceptable freeze-thaw-wash recovery (83.3-91.4%). When a 51Cr label was used for the previously frozen red cells and a simultaneous 52Cr label for freshly drawn autologous red cells was used as a comparison, it was seen that the previously frozen cells had normal 24-hour posttransfusion survival (75.1-88.4%) as well as normal half-life (23-33.7 days). These findings support further extension of the maximum allowable storage time for previously frozen red cells.
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