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Improved post‐transfusion quality of density separated AS‐3 red cells after extended storage
Author(s) -
Keegan T. E.,
Holme A. Heaton S.,
And M. Owens,
Nelson E. J.
Publication year - 1992
Publication title -
british journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.907
H-Index - 186
eISSN - 1365-2141
pISSN - 0007-1048
DOI - 10.1111/j.1365-2141.1992.tb04602.x
Subject(s) - red cell , isotopes of chromium , chemistry , chromatography , andrology , medicine , nuclear chemistry
Summary A centrifugal method of red cell density separation was utilized for unit processing in these studies to determine the quality of the lighter fraction (neocytes) after storage for up to 42 d and to evaluate whether the heavier fraction (gerocytes) deteriorated more rapidly than neocytes during storage. Each unit was passed through a Leukotrap filter to remove white cells prior to density separation. Red cell recovery and survival were evaluated using double label technetium‐99m with either chromium‐51 or nonradio‐isotopic chromium which permitted concurrent paired analysis. In vivo neocyte red cell recovery, as tested on the same 11 donors on days 1. 7 and 42 of storage, was effectively unchanged. Recovery and survival half‐life (that is, the number of days after transfusion at which half of the cells infused remain in the circulation) of 42 d stored gerocytes were significantly lower than similarly stored neocytes (75.5 ± 7.2% and 20.1 ± 6 5 d for gerocytes versus 84.4±4.9% and 39.0±9.0 d for neocytes). One‐day stored neocytes showed a 16.5% increase in red cell availability over the combined average for 42 d stored neocytes and gerocytes. Statistically, while there were significantly higher ATP, 2,3‐DPG, and lactate levels pre‐storage by paired t ‐test for neocytes compared to gerocytes, by day 42 there were no significant differences detected between the two red cell fractions by any of the in vitro variables measured. These studies suggest that this simple separation technique for leucocyte‐poor red cell units provides a neocyte population with improved viability and the potential for increased transfusion intervals in chronically transfused patients.