You searched for: “hemodialyses
hemodialysis, haemodialysis (s); hemodialyses, haemodialyses (pl)
1. A procedure for removing metabolic waste products or toxic substances from the bloodstream by dialysis.
2. Dialysis of the blood to remove toxic substances or metabolic wastes from the bloodstream; used in the case of kidney failure.
3. The removal of certain elements from the blood by virtue of the difference in the rates of their diffusion through a semipermeable membrane.

Two distinct physical processes are involved, diffusion and ultrafiltration; also called, dialysis, kidney dialysis, and renal dialysis.