... analyzing the data and interpreting the results, drafting and revising the manuscript, and approving the manuscript in its final form RA, KK, and JO contributed to acquiring and managing the data, ... really influence the final response to RBC transfusion NIRS monitors hemoglobin oxygen saturation in arterioles, venules, and capillaries in the measured volume of tissue, and the relative contributions ... must continue to explore the meaning of reactive hyperemia as a surrogate of microvascular functionality Conclusions The effects of RBC transfusions on microvascular oxygenation, consumption, reactivity,...