Fig. 2From: Feasibility and accuracy of noninvasive continuous hemoglobin monitoring using transesophageal photoplethysmography in porcine modelShowed the ROC curves for ACred/DCred and ACinf/DCinf in predicting Hb < 60 g/L (A) and Hb > 100 g/L (B). ROC, receiver operating characteristic curve; ACred, alternating current of red light; DCred, direct current of red light; ACinf, alternating current of infrared light; Hb, hemoglobin concentrationBack to article page