title: Postdialysis fatigue: lack of effect of a biocompatible membrane.
abstract: Tumor necrosis factor-alpha (TNF-alpha) has been shown to have somnogenic properties. Plasma levels of this cytokine have been found to increase significantly during dialysis with a bioincompatible (cuprophane) membrane in patients with postdialysis fatigue (PDF). We conducted a crossover study with random assignment to ascertain whether a biocompatible membrane might attenuate the increase of TNF-alpha and severity of PDF. Sixteen patients on maintenance hemodialysis underwent dialysis with either cuprophane (n = 8) or polymethylmethacrylate (PMMA; n = 8) membranes for 1 week and then switched to the opposite membrane during the second week. Predialysis and postdialysis measurements of plasma TNF-alpha levels were performed during the first and last dialysis treatments of each week. A fatigue score was determined from the sum of duration of fatigue and sleep within 6 hours of the completion of dialysis. TNF-alpha levels increased by an average of 18.3% during dialysis with cuprophane membranes but only 2.4% with PMMA membranes (P = 0.04). Despite this, fatigue scores remained unaltered (approximately 4 of 6). Hence, the biocompatible membrane, PMMA, failed to alleviate PDF. This suggests that dialytic stimulation of TNF-alpha plays no substantial role in the pathogenesis of PDF.
authors.affiliation: Department of Medicine, United Health Services Hospitals, Binghamton, NY, USA. asklar@juno.com
authors.forename: A H
authors.initials: AH
authors.lastname: Sklar
authors.forename: D H
authors.initials: DH
authors.lastname: Beezhold
authors.forename: N
authors.initials: N
authors.lastname: Newman
authors.forename: T
authors.initials: T
authors.lastname: Hendrickson
authors.forename: A W
authors.initials: AW
authors.lastname: Dreisbach
mesh_terms: D001672:Biocompatible Materials; D002482:Cellulose / Q000031:analogs & derivatives; D018592:Cross-Over Studies; D005221:Fatigue / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008567:Membranes, Artificial; D008875:Middle Aged; D019904:Polymethyl Methacrylate; D006435:Renal Dialysis / Q000009:adverse effects* / Q000295:instrumentation; D014409:Tumor Necrosis Factor-alpha / Q000032:analysis
chemical_list: D001672:Biocompatible Materials; D008567:Membranes, Artificial; D014409:Tumor Necrosis Factor-alpha; D002482:Cellulose; D019904:Polymethyl Methacrylate; C009865:cuprammonium cellulose