Table 5.
RRT Modalities and Their Characteristics.56
| Modality | Duration | Clearance mechanism | Replacement fluid | |
|---|---|---|---|---|
| Convection | Diffusion | |||
| Continuous renal replacement therapy (CRRT) | ||||
| Continuous venovenous hemofiltration (CVVH) | ≥24 h | ++++ | – | +++ |
| Continuous venovenous hemodialysis (CVVHD) | ≥24 h | + | ++++ | + |
| Continuous venovenous hemodiafiltration (CVVHDF) | ≥24 h | +++ | +++ | ++ |
| Slow continuous ultrafiltration (SCUF) | ≥24 h | + | – | 0 |
| Intermittent renal replacement therapy (IRRT) | ||||
| Intermittent hemodialysis (IHD) | 4–6 h | + | ++++ | + |
| Sustained low efficiency dialysis (SLED) | 6–12 h | + | ++++ | + |
RRT = renal replacement therapy.