Platelet concentrates were prepared in plastic packs of polyvinyl chloride with
tri-(2-ethylhexyl) trimellitate as plasticizer. They were stored, with gentle shaking, at room
temperature for periods up to 7 days before labelling with isotope and reinfusing. In vivo
survival studies, platelet counts, pH and electron microscopy indicated that platelet concentrates
prepared in the new plastic were superior to those prepared in the standard pack
currently in use. Oxygen was found to diffuse through the new pack more rapidly than
through the standard pack. A shelf life of up to 1 week at room temperature seems possible for
platelet concentrates prepared in the new plastic.
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