Figure 3.

Bland–Altman analysis. The same data as above are used; here it is possible to distinguish between different modalities. Parallel lines indicate standard deviation. CVVH, continuous veno-venous hemofiltration; CVVHD, continuous veno-venous hemodialysis; CVVHDF, continuous veno-venous hemodiafiltration; K_CALC, calculator-estimated urea clearance; K_DEL, delivered clearance evaluated from urea concentrations on simultaneous blood and effluent samples.