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Published in: Journal of Nephrology 4/2017

01-08-2017 | Original Article

Long term variation of serum levels of uremic toxins in patients treated by post-dilution high volume on-line hemodiafiltration in comparison to standard low-flux bicarbonate dialysis: results from the REDERT study

Authors: Vincenzo Panichi, Maria Teresa Rocchetti, Alessia Scatena, Alberto Rosati, Massimiliano Migliori, Francesco Pizzarelli, Loreto Gesualdo, REDERT Study group

Published in: Journal of Nephrology | Issue 4/2017

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Abstract

Purpose of the study

Little information have been provided till now regarding the effect of high volume HDF (hv-OL-HDF) in respect to standard bicarbonate dialysis (BHD) in medium-long term protein-bound toxins removal.

Procedures

A randomised cross-over multicentre study (REDERT study) was designed to compare the effects of hv-OL-HDF and low-flux BHD on uremic toxins serum levels in 36 chronic dialysis patients followed for 13 months. Group 1 patients were treated with BHD (Treatment A) for 6 months, and afterwards, they were transferred to hv-OL-HDF for a further 6 months (Treatment B). Group 2 patients were treated with Treatment B for 6 months, and afterwards, they were transferred to Treatment A for a further 6 months. Total and free pre-dialysis indoxyl-sulfate (IS) and p-cresyl-sulfate (pCS) were determined starting a midweek dialysis session at baseline and after six months of hv-OL-HDF or BHD. IS and pCS, were simultaneously measured, by liquid chromatography/electrospray ionization-tandem mass spectrometry, Kt/v and pre and post-dialysis b-2microglobulin (b2MG) levels were measured every three months.

Results

Kt/V was significantly increased in hv-OL-HDF (from 1.47 ± 0.24 to 1.49 ± 0.16; p < 0.01) and was reduced in BHD (from 1.51 ± 0.2 to 1.36 ± 0.21; p < 0.001). The mean infusion volume in HDF was 20.9 ± 2.1 L with a mean total convective volume of 23.8 ± 2.3 L and a significant removal of b2MG was obtained in hv-OL-HDF at month 3 and month 6. Both free and total levels of IS and pCS were significantly reduced in hv-OL-HDF at month 6 in respect to BHD.

Conclusions

In the present study we confirm the assumption that post-HDF is an effective technique in small and protein-bound uremic toxins removal.Introduction
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Metadata
Title
Long term variation of serum levels of uremic toxins in patients treated by post-dilution high volume on-line hemodiafiltration in comparison to standard low-flux bicarbonate dialysis: results from the REDERT study
Authors
Vincenzo Panichi
Maria Teresa Rocchetti
Alessia Scatena
Alberto Rosati
Massimiliano Migliori
Francesco Pizzarelli
Loreto Gesualdo
REDERT Study group
Publication date
01-08-2017
Publisher
Springer International Publishing
Published in
Journal of Nephrology / Issue 4/2017
Print ISSN: 1121-8428
Electronic ISSN: 1724-6059
DOI
https://doi.org/10.1007/s40620-017-0381-2

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