CRRT
Filtration fraction (CVVH)
FF = Qf / Qp where Qp = Qb × (1 − Hct). Keep < 25% to limit hemoconcentration and clotting.
Required inputs
- Blood flow Qb (mL/min)
- Hematocrit (%)
- Total filtrate flow Qf (mL/min)
- Pre-filter replacement (mL/min)
Equation or source
Ronco C. KI 2011;80:115.