Pooled platelet concentrates provide a small benefit over single-donor platelets for patients with platelet refractoriness of any etiology

Abstract

BackgroundAt our institution, patients with platelet refractoriness (of any etiology) are sometimes switched from apheresis platelets to pooled platelets before human leukocyte antigen (HLA)-matched units become available.Study design and methodsSeven patients were analyzed. Platelet counts were available from 57 single-unit transfusions (26 pooled, 31 apheresis). A mixed linear effects model was used and significance was determined using a likelihood ratio test.ResultsWhen analyzed as the only fixed effect in the model, the use of pooled versus single-donor units and time from transfusion to post-transfusion blood sampling each showed a significant effect on platelet count increments. A mixed linear effect model including both factors showed that transfusing a pooled unit correlated with a 4500±2000/µL greater platelet count increment compared with a single-donor unit, and an increase in time from transfusion to post-transfusion blood sampling lowered the platelet count increment by 300±100/µL per hour.ConclusionA small but potentially clinically relevant benefit was observed in transfusing pooled random-donor platelets compared with single-donor units for patients with platelet refractoriness (of any etiology).