Fig. 3From: Preoperative endothelial dysfunction for the prediction of acute kidney injury after cardiac surgery using cardiopulmonary bypass: a pilot study based on a second analysis of the MONS studyCutaneous microcirculatory blood flow during stimulation tests. A Iontophoresis of acetylcholine. B Local thermal hyperemia. Data are expressed in laser speckle perfusion unit (LSPU) as median [interquartile range] after subtraction of movement artifacts. ACh, acetylcholineBack to article page