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MINERVA UROLOGICA E NEFROLOGICA

A Journal on Nephrology and Urology


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Minerva Urologica e Nefrologica 2004 September;56(3):205-13

Copyright © 2004 EDIZIONI MINERVA MEDICA

language: English

Role of sodium in dialysis

Charra B., Chazot C., Jean G., Hurot J. M., Terrat J. C., Vanel T., Lorriaux C., Vovan C.

Center of Artificial Kidney, France


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The total amount of sodium present in the body conditions the extracellular compartment volume. In advanced renal failure and in dialysis the sodium balance becomes positive and the extracellular volume inflates. This leads to hypertension and to direct cardiac and vascular changes that explain for a large part the excessive cardiovascular morbidity and mortality in dialysis patients. Controlling body sodium content and extracellular volume allows to reduce hypertension, cardiovascular changes and to improve dialysis patients survival. This can be achieved by reducing the sodium input (low sodium diet and reasonably low sodium dialysate) and/or by increasing sodium output (ultrafiltration by convection in hemodialysis or hemofiltration and osmotic drive in peritoneal dialysis). The intermittent nature of hemodialysis (and hemofiltration) conditions the saw-tooth volume fluctuations that drove to conceiving and implementing the concept of a dry weight, corresponding to normal extracellular volume and blood pressure.

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