title: Is 3000 S Hospal a suitable dialyzer to shorten dialysis time schedule? A cooperative study on biofiltration.
abstract: The Biofilter 3000 S Hospal may combine higher convective clearance rates (Cc) with usual diffusive clearance rates (Cd) (i.e. similar to Cuprophan dialyzers), giving a higher total clearance rate (Ct) of small and middle molecules. Use of the Biofilter has been suggested to shorten dialysis time schedules. This study was carried out in 8 patients on RDT 3 times weekly, by cuprophan filter and acetate dialysis. The patients were shifted to dialysis with 3000 S guided by two principles: to shorten dialysis time by 1 hour per session, and to reinfuse 6 liters of bicarbonate-saline solution (40 mEq/l) per single dialysis. Besides the usual clinical and laboratory controls, in three patients clearance studies were carried out during four different dialysis sessions: Ct, Cc and Cd of urea K+, creatinine, uric acid and phosphate were measured. No change was observed in the main clinical and laboratory parameters after 3-5 months (average 3.9) of treatment with Biofilter 3000 S; in addition, serum alkaline phosphatase concentration decreased progressively. Clearance results, however, indicate that the expected high values of Ct do not occur, because Cd decreases as Cc is increased. A primary goal of research in hemodialysis is to reduce the average time of treatment while ensuring simultaneously "physiological" dialysis. A possible approach to this problem is to use dialyzers with highly permeable and biocompatible membranes such as the "biofilter" 3000 S Hospal.(ABSTRACT TRUNCATED AT 250 WORDS)
mesh_terms: D000085:Acetates; D000180:Acrylic Resins; D000181:Acrylonitrile / Q000031:analogs & derivatives; D000328:Adult; D000368:Aged; D001639:Bicarbonates; D001769:Blood; D001774:Blood Chemical Analysis; D006801:Humans; D008567:Membranes, Artificial; D008875:Middle Aged; D006435:Renal Dialysis; D013997:Time Factors; D014462:Ultrafiltration / Q000295:instrumentation* / Q000379:methods
chemical_list: D000085:Acetates; D000180:Acrylic Resins; D001639:Bicarbonates; D008567:Membranes, Artificial; C016892:AN-69; D000181:Acrylonitrile