1. Concentration gradient for the osmotic agent eg Glucose.
2. Effective Peritoneal surface area.
3. Hydraulic conductance of the peritoneal membrane
4. Reflection coefficient of the osmotic agent - glucose
5. Hydrostatic pressure gradient.
6. Osmotic pressure gradient
7. Sieving
8. Alternative osmotic agents - eg Icodextrin.
Ref Daugirdas, Handbook of Dialysis.