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  • Title: On-line haemodiafiltration with and without acetate.
    Author: Pizzarelli F, Cerrai T, Dattolo P, Ferro G.
    Journal: Nephrol Dial Transplant; 2006 Jun; 21(6):1648-51. PubMed ID: 16464887.
    Abstract:
    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.
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