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Preparation of red blood cell concentrates and plasma units from whole blood held overnight using a hollow‐fibre separation system

The ErySep system represents an alternative to centrifuge‐based whole blood (WB) separation, using gravity and filtration through hollow‐fibres (0·2 µm pore size) to produce red blood cell (RBC) and plasma components. The aim of this study was to characterise the quality of ErySep RBC and plasma units compared with standard products from WB held overnight.