Fig. 1From: Exploring the microvascular impact of red blood cell transfusion in intensive care unit patientsExamples of microcirculatory blood flow measurements in the skin area in 2 patients in response to Ach iontophoresis before (blue curve, H0) and after (red curve, H1). Left, RBC transfusion impaired microvascular reactivity to acetylcholine; right, RBC transfusion improved microvascular reactivity to acetylcholine. PU for perfusion unitsBack to article page