Healthy kidneys are able to maintain the body’s internal equilibrium of water and essential minerals and remove daily metabolic load of fixed hydrogen ions from the body. They also produce erythropoietin and 1.25-dihydroxycholecalciferol (calcitriol).
But in the instance of renal failure, dialysis is the primary necessity in order to perform renal replacement therapy. Dialysis may be used for patients that experience acute renal failure or End Stage Chronic Kidney Disease.
It must be noted that dialysis is an imperfect treatment to replace kidney function since it does not correct the endocrine functions of the kidney. Dialysis treatments replace some of these functions through diffusion (waste removal) and ultra filtration (fluid removal).