Journal Article

On-line haemodiafiltration with and without acetate

Francesco Pizzarelli, Tiziano Cerrai, Pietro Dattolo and Giuseppe Ferro

in Nephrology Dialysis Transplantation

Published on behalf of European Renal Association - European Dialysis and Transplant Assoc

Volume 21, issue 6, pages 1648-1651
Published in print June 2006 | ISSN: 0931-0509
Published online February 2006 | e-ISSN: 1460-2385 | DOI:
On-line haemodiafiltration with and without acetate

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Background. In patients on on-line convective treatments, given the considerable quantity of dialysis fluid re-infused, the small amount of acetate present in bicarbonate dialysis fluid as a pH stabilizing factor may allow a significant transfer of that anion to the patient, possibly inducing cytokine activation.

Methods. To verify this hypothesis, we performed on-line haemodiafiltration (OL-HDF) with (3 mmol/l) and without acetate in dialysis fluid in a cross-over randomized order on 12 prevalent patients.

Results. In comparison with the pre-treatment values, plasma acetate levels were unchanged during and after acetate-free OL-HDF, while they were 5–6 times higher in the course of OL-HDF containing acetate in dialysis fluid; plasma acetate levels returned to basal values 2 h after the end of the procedure. The total increase of bases in the patient attributable to acetate was 36%. Plasma bicarbonate values at the end of treatment were significantly lower in treatments without acetate, as compared to those with acetate. Interleukin-6 plasma levels were super-imposable at the beginning and in the course of the two methods compared, but there was a tendency towards a greater increase at an interval of 2 h following OL-HDF with acetate.

Conclusions. Our preliminary results confirm the assumption that body gain of acetate is particularly high in convective treatments, while acetate-free OL-HDF slows down acetate burden. Clinical advantages due to these effects should be evaluated in properly designed prospective studies.

Keywords: acetate; acetate-free dialysate; cytokines; inflammation; on-line haemodiafiltration

Journal Article.  2501 words.  Illustrated.

Subjects: Nephrology

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