Filtered Microaggregate‐Free Erythrocyte Concentrates with 35‐Day Shelf Life

Abstract. Packed erythrocytes which are white cell and microaggregate poor and virtually platelet free, with a long shelf life (35 days), can be prepared from a routinely used plastic pack system incorporating a cotton wool filter module. The filtered packed cells have improved physical and biochemical properties after prolonged storage, and with acceptable autologous erythrocytic survivals the system lends itself to routine clinical practice. It avoids the need for microaggregate filters at administration, at the same time reducing the immunogenicity of the transfused blood. Blood component harvesting is not compromised.