Fig. 2From: Discrepant post filter ionized calcium concentrations by common blood gas analyzers in CRRT using regional citrate anticoagulationMeasurements of ionized calcium illustrated as box plots for systemic and post filter samples by instrument. Lower row (blue boxplots), post filter samples; upper row (red boxplots), systemic samples. Horizontal lines, respective upper and lower limits of target intervals according to previous publications [7, 8]Back to article page