
| 10.1093/ndt/gfw370
http://scihub22266oqcxt.onion/10.1093/ndt/gfw370
 C5837204!5837204!28186570
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Nephrol+Dial+Transplant 2017 ; 32 (2): 364-70 Nephropedia Template TP
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A reliable method to assess the water permeability of a dialysis system: the global ultrafiltration coefficient* #MMPMID28186570Ficheux A; Gayrard N; Duranton F; Guzman C; Szwarc I; Vetromile F; Brunet P; Servel M; Argil�s ANephrol Dial Transplant 2017[Feb]; 32 (2): 364-70 PMID28186570show ga
Background: Recent randomized controlled trials suggest that sufficiently high convection post-dilutional haemodiafiltration (HC-HDF) improves survival in dialysis patients, consequently this technique is increasingly being adopted. However, when performing HC-HDF, rigorous control systems of the ultrafiltration setting are required. Assessing the global ultrafiltration coefficient of the dialysis system [GKD-UF; defined as ultrafiltration rate (QUF)/transmembrane pressure] or water permeability may be adapted to the present dialysis settings and be of value in clinics.Methods:GKD-UF was determined and its reproducibility, variability and influencing factors were specifically assessed in 15 stable patients routinely treated by high-flux haemodialysis or HC-HDF in a single unit.Results:GKD-UF invariably followed a parabolic function with increasing QUF in dialysis and both pre- and post-dilution HC-HDF (R2 constantly >0.96). The vertex of the parabola, GKD-UF-max and related QUF were very reproducible per patient (coefficient of variation 3.9 � 0.6 and 3.3 � 0.3%, respectively) and they greatly varied across patients (31?42 mL/h?1/mmHg and 82?100 mL/min, respectively). GKD-UF-max and its associated QUF decreased during dialysis treatment (P < 0.01). The GKD-UF-max decrease was related to weight loss (R2 = 0.66; P = 0.0015).Conclusions:GKD-UF is a reliable and accurate method to assess the water permeability of a system in vivo. It varies according to dialysis setting and patient-related factors. It is an objective parameter evaluating the forces driving convection and identifies any diversion of the system during the treatment procedure. It is applicable to low- or high-flux dialysis as well as pre- or post-dilution HDF. Thus, it may be used to describe the characteristics of a dialysis system, is suitable for clinical use and may be of help for personalized prescription.�
  
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