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Post-Transfusion Thrombocytopenia: Its Duration in Splenic and Asplenic Individuals
... More recently Hart et al. [28] have shown that the maximal transfusion induced thrombocytopenia affect is not seen until 72 h post-transfusion. A consequence of this effect being time dependent is that a number of patients may have a platelet count within an acceptable range at 24 h post-transfusion but not at 72 h and therefore extended observation would be advisable. ...
Blood filters have been available since the 1930s. In this review we evaluate the role of microaggregate filters (MF) in certain transfusion complications, namely non-haemolytic febrile transfusion reactions (NHFTR), pulmonary injury, thrombocytopenia, fibronectin depletion and histamine release. We review the latest generation of leucocyte depleting filters and discuss their role in preventing alloimmunisation, immunosuppression and CMV transmission. Finally, we provide a rationale for the role of blood microfiltration in the present day practice of intensive care medicine.
Platelet counts were measured before and after red cell transfusions in 30 patients with anaemia and severe thrombocytopenia resulting from haematological diseases. There was a mean reduction of 1.1 x 109/l (P = 0.43) in the platelet count after transfusions of 2-3 units of leucocyte-depleted red cell concentrates (20 patients). However, there was a mean reduction of 2.7 x 109/l (P = 0.03), approximately 10%, in the platelet count after transfusions of non-leucocyte-depleted red cell concentrates (10 patients). The findings suggest that the forthcoming introduction of universal leucocyte depletion of red cell concentrates will minimize the worsening of thrombocytopenia that occurs in severely thrombocytopenic patients receiving standard non-leucocyte-depleted red cell concentrates.
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