Significance of pre‐storage leucoreduction for autologous blood

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BACKGROUND AND OBJECTIVES: To reveal the associations between cytokines in blood and transfusion-related adverse events, we studied whether pre-storage leucoreduction of autologous blood could reduce the degree of inflammatory responses, infection rates, or the duration of hospitalizations. MATERIALS AND METHODS: Patients scheduled to donate autologous blood for elective orthopaedic surgery were assigned to receive either leucoreduced (LR) or non-leucoreduced (N-LR) autologous blood based on their date of birth. Levels of cytokines in the autologous blood, values for C-reactive protein, complete blood count and body temperature of the patients, as well as adverse clinical events, were evaluated periodically. RESULTS: Four hundred patients entered this study (LR group: 196, N-LR group: 204). The production of cytokines, excluding interleukin 1beta (IL-1beta), was suppressed for the LR group. However, for unknown reasons, IL-1beta actually increased during storage for the LR group. There were no differences between the two groups in the length of hospital stay, postoperative C-reactive protein changes, leucocyte count, or body temperature, and no clinical problems associated with blood transfusion were observed in either group. CONCLUSION: Pre-storage leucoreduction for autologous blood may be effective to suppress cytokine accumulation. However, clinical benefits such as prevention of febrile non-haemolytic reactions could not be demonstrated.

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