Dialysis fluid used in the treatment of renal failure should contain the normal plasma levels of

A. False It should be urea-free to provide a high concentration gradient for urea loss.

B. False It should be lower to favour loss of potassium, which is elevated in renal failure.

C. False It should be higher to reduce extracellular fluid volume and hence blood pres-sure.

D. False Fluid transfer is governed by hydrostatic pressure and crystalloid osmolality gra-dients, not by colloid osmotic pressure gradients.

E. True It should be buffered to prevent large pH changes.