Combination of Medium Cut-off Dialyzer Membrane and Diet Modification to Alleviate Residual Uremic Syndrome of Dialysis Patients

2020-02-04 15:51:50 | BioPortfolio


The study will compare achieved levels of protein-bound uremic toxins with dialysis using a medium cut-off membrane compared to the treatment by online haemodiafiltration with a high-flux dialysis membrane. In the second phase of the study dietary fiber and short-chain fatty acid intake will be increased to verify a possible additional reduction in the levels of protein bound uremic toxins.


The investigators will carry out a prospective interventional randomised study to compare achieved serum concentrations of selected protein bound uremic toxins by dialysis with a medium cut-off membrane (Theranova, Baxter AG, USA) and online hemodiafiltration with a standard "high-flux" dialysis membrane. In the second phase, both dialysis purification methods will be supplemented by a change in the diet with increase of the daily intake of dietary fiber to 30g and addition of a short-chain fatty acid propionate in the dose of 1 g daily.

The main outcome of the study is the serum concentration of p-cresol sulphate. Secondary outcome is the serum concentration of indoxyl-sulphate and trimethylamine-N-oxide (TMAO). Serum albumin concentration and lean body weight of patients represent safety outcomes for this study.

This investigator-initiated research project has been entirely planned and will be conducted by the clinical researchers in a tertiary University Medical Center Ljubljana.

The study will include 50 chronic prevalent stable dialysis patients in the following periods:

- 2 weeks of wash-in period with standard bicarbonate haemodialysis and standard high-flux dialysis membrane,

- then the patients will be randomized in a 1:1 ratio to either one of the two study arms:

- (interventional study arm) 4 weeks of dialysis with medium cut-off (Theranova) membrane (first phase), then dialysis for 4 weeks with the same membrane and increased fiber intake (second phase),

- (control study arm) 4 weeks of dialysis with a high-flux membrane using on-line haemodiafiltration (first phase) and 4 weeks of high-flux membrane haemodiafiltration and increased fiber intake (second phase),

- finally, all patients will undergo a 4 week wash-out period with a standard bicarbonate haemodialysis using standard high-flux dialysis membrane identical to wash-in period.

Measurement of the study end-points will be carried out at the end of 2-week wash-in period, each 4-week period and at the end of 4 week wash-out period.

Study Design


End Stage Renal Disease


medium cut-off (MCO) dialysis membrane, Dietary fiber mixture (Plantago Psyllium and Inulin), Sodium propionate


University Medical Center ljubljana


Not yet recruiting


University Medical Centre Ljubljana

Results (where available)

View Results


Published on BioPortfolio: 2020-02-04T15:51:50-0500

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