Dialysis is one of the methods used to treat kidney failure.Whilst it doesn't cure you, it does stop you from dying.
In a dialysis machine, a person's blood flows between partially permeable membranes. The dialysis fluid contains the same concentration of useful substances as the blood. This ensures that glucose and other useful mineral ions are not lost. Urea passes out from the blood into the dialysis fluid. Treatment by dialysis restores the concentrations of dissolved substances in the blood to normal levels and has to be carried out at regular intervals.
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