The Place of Large Pore Membranes in the Treatment Portfolio of Patients on Hemodialysis.

Abstract:

:Cardiovascular disease is a major concern in patients with end-stage kidney disease (ESKD). Inflammation induced by retention of uremic toxins, of which a substantial fraction has a molecular weight in the middle molecular range, has been associated with increased cardiovascular risk. In an attempt to reduce inflammation and thus cardiovascular toxicity in patients with ESKD, hemodiafiltration (HDF) has been promoted to enhance the clearance of middle molecular weight substances during dialysis. However, HDF increases the technical complexity and costs, and requires ultrapure dialysis fluid. Also, HDF becomes less beneficial when it is not possible to achieve sufficient convective volume in all patients. Over the last years, membranes with larger pore sizes, such as medium cut-off and high cut-off, have been introduced. These membranes, applied in hemodialysis mode, appear to have removal rates of middle molecular weight molecules that are comparable to those achieved with HDF, and could thus obviate the need for HDF. However, ultrapure dialysis fluid might still be required if there is a risk of transmigration of contaminants from the dialysate side into the blood because of the increased pore size. This transmigration of pyrogens might upregulate the expression of cytokines and other pro-inflammatory factors, and thus completely neutralize the beneficial effects of higher clearance of middle molecules. This chapter will explore the existing evidence on permeability of membranes with large pores for bacterial degradation products, and based on this information we will try to define the position of these novel membranes among the spectrum of existing membranes.

journal_name

Contrib Nephrol

authors

Van Biesen W,Vanholder R,Schepers E,Glorieux G,Dhondt A,Eloot S

doi

10.1159/000479265

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

168-177

eissn

0302-5144

issn

1662-2782

pii

000479265

journal_volume

191

pub_type

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