Figure 1.

An Adequacy Calculator worksheet: continuous veno-venous hemodiafiltration (CVVHDF) is delivered in a 70 kg patient. Post-dilution mode is selected, machine settings and prescribed treatment time per day are entered on the upper left panel: estimated urea clearance (K_CALC) and 'daily Kt/V' (spKt/V_CALC) are displayed on the right. In the lower left panel it is possible to obtain K_DEL measure after entering prefilter blood (Cbi) and effluent (Cdo) urea concentration: in this case, when operative times are entered, 'daily Kt/V' cell displays effectively delivered fractional clearance (spKt/V_DEL).