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F-Series dialyzers

Not all polysulfones are like Fresenius Polysulfone®

  • Proven quality and efficiency of Fresenius Polysulfone®
  • The original benchmark for biocompatibility
  • INLINE steam sterilized
  • Available in both low-flux and high-flux ranges

Key features


INLINE steam sterilization – purity enhanced

INLINE steam sterilisation process
The INLINE steam sterilization process of F-Series dialyzers. Diagram shows example use with FX dialyzers.

INLINE steam sterilization – how it works

  1. Both the blood and the dialysate compartment of the dialyzers are rinsed continuously with steam at a temperature at or above 121°C for a minimum of 15 minutes. Rinsing with hot steam and without chemicals results in extremely low levels of residuals in the dialyzer
  2. The dialyzer is rinsed with sterile water
  3. Every dialyzer is tested for fiber integrity using a bubble-point test
  4. The dialyzers are dried with warm, sterile air
  5. Finally, after drying the blood inlet and outlet ports are closed

INLINE steam sterilization – the benefits

Fibre integrity testing

Quality from start to finish

  • Fresenius Polysulfone® dialyzers are produced to meet international safety regulations
  • Fresenius Medical Care’s core competency is the complete production from membranes to the finished dialyzers, providing the highest quality during every step of production 
Integrity test of fibers

Performance data

Low Flux Dialysers – High Performance Steam (HPS)

High Flux Dialysers

Related Content

1 Krieter DH, Sauer N, Stanic D, Reinhardt B, Lemke HD, Tetta C, Kliem V: Biocompatibility of the new DIAPES LF 100 low flux dialysis membrane. Blood Purification 20: 498-520, 2002.
2 Schäfer RM, Hörl WH, Gilge U, Konrad G, Heidland A : Biocompatibility profile of the Polysulfone 400 membrane. In: Contributions to Nephrology, Karger, Basel, 74: 43-51, 1989.
3 Hakim R: Clinical implications of hemodialysis membrane biocompatibility. Kidney International 44: 484-494, 1993.
4 Debrand-Passard A, Lajous-Petter A, Schmidt R, Herbst R, von Baeyer M, Krause AA, Schiffl M: Thrombogenicity of dialyser membranes as assessed by residual blood volume and surface morphology at different heparin dosages. In: Contributions to Nephrology, Karger, Basel, 74: 2-9, 1989.
5 Hoenich NA, Woffindin C, Cox PJ, Goldfinch M, Roberts SJ: Clinical characterisation of DICEA a new cellulose membrane for haemodialysis. Clinical Nephrology 48: 253-259, 1997.
6 Weber V, Linsberger I, Rossmanith E, Falkenhagen D. Pyrogen transfer across high- and low-flux hemodialysis membranes. Nephrology Dialysis Transplantation 18, Suppl. 4 : T451, 2003.