Abstract
Oxygen transport function of preserved blood decreases as a function of storage period. For quality control of preserved erythrocytes, any quantitative estimation is to be established. However, no systemic evaluation of the cell function has been extablished. We proposed here an index, transfusion index, as an indicator for quantitative estimation of the cell function.Transfusion index of the cells is a product of their oxygen delivery capacity and their posttransfusion survival. The transfusion index of stored blood drastically decreased when red cells were stored for more than two weeks in liquid preservatives at 4°C, indicating that red cells stored for more than two weeks are not adequate to the transfusion. Red cell oxygen delivery capacity closely related to the cell 2, 3-DPG concentration and the transfusion index could be raised by increasing 2, 3-DPG in the cells.
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