Data viva — interpreting a continuous renal replacement therapy prescription

Stimulus

You are shown the chart of a 70 kg patient on continuous venovenous haemodiafiltration, day 2 of the run. The recorded data are:^[1]

^[1]| Parameter | Value | |---|---| | Prescribed effluent dose | 30 mL/kg/h | | Delivered effluent (24 h total) | 32,760 mL over the day | | Filter downtime | 6 hours of the 24 | | Patient weight | 70 kg | | Urine output (24 h) | 120 mL | | Creatinine on day 1 of RRT | 410 micromol/L | | Creatinine on day 2 of RRT | 380 micromol/L | | Baseline creatinine (pre-admission) | 85 micromol/L | | Potassium on day 2 | 4.8 mmol/L |