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CRRT and plasmapheresis filters

EMiC2 filter

Appropriate for Ci-Ca citrate and heparin anticoagulation

  • Steam sterilized
  • Long filter lifetimes
  • Excellent biocompatibility
  • Robust capillaries with minimal risk of blood leak
  • Filter size selectable to meet patient’s requirement


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Key features


In the course of the INLINE-steam sterilization, the filters are continuously rinsed with 121°C hot, sterile steam for 15 minutes and dried thereafter. This process ensures:

  • Dialyzers free from residuals
  • Defined membrane characteristics

An important safety aspect is the 100% leakage-testing of all filters, with just sterile water and sterile filtered air. This is only possible because of the special structure of the Fresenius Polysulfone membrane – and the absence of pore filling agents like glycerin.

All production steps from the manufacturing of the membrane up to the finished dialyzer are adjusted to each other resulting in constant highest quality.


AVpaed, AV400S, AV600S and AV1000S filters have different surface areas but the same reliable membrane. Substances with a molecular weight of up to approximately 30 kDa can be eliminated, while essential plasma proteins like albumin and cellular blood constituents are retained.

The membrane of the Ultraflux EMiC2 is optimized to increase the removal of middle molecules.

Ultraflux EMiC2 at a glance:

  • High permeable pores and an adjusted cut-off of approximately 40kDa
  • Increased clearance of myoglobin in rhabdomyolysis, or cytokines, interleukins and other factors elevated in sepsis
  • Steep sieving coefficient curve closely mimics the glomerular basement membrane
  • Narrows the gap to physiological renal function


  • Simplified set-up due to dry delivery of P1dry and P2dry plasma filters
  • Free passage of protein components even exceeding molecular weights of two million Dalton
  • Retaining blood cells
  • Double-layer membrane prevents blood cells from blocking fine pores
  • Fresenius Polysulfonewith high biocompatibility


Improved removal of middle molecules

EMiC2 filter for the removal of middle molecules

  • Enhanced Middle Molecule Clearance
  • Cut-off at around ~ 40 kDa
  • Advanced hollow fiber undulation
  • Steep sieving coefficient curve closely mimics the glomerular basement membrane
  • Substantially stable albumin levels
  • High efficacy also at low blood flows

Ultraflux EMiC2 benefits from modern membrane technology thanks to the higher permeability of its membrane and adjusted cut-off.

Type Surface area Filling volume
Ultraflux EMiC2 1.8 m2   130 mL


Ultraflux AV

Steam-sterilized Fresenius Polysulfone Filters

The Ultraflux filters contain a Fresenius Polysulfone membrane specifically developed for continuous renal replacement therapy. With this membrane, substances with a molecular weight of up to approximately 30kD can be eliminated. While plasma proteins like albumin, other large molecules and cellular blood constituents are retained. The filtration characteristics of this membrane come close to the natural human kidney’s function.
Due to their high mechanical stability and excellent filter lifetimes, the Ultraflux filters AV paed, AV 400S, AV 600S, AV 1000S are applicable for use in all continuous renal replacement treatments.

The large inner lumen and thin wall thickness of the capillaries in the Ultraflux filters improve the flow geometry and provide the following advantages:

  • Low flow resistance in the capillaries reduces friction and shear forces
  • High fluid exchange enables unrestricted ultra-filtrate flow
  • Excellent filter lifetime
Type Surface area Filling volume
Ultraflux AV400S 0.75 m2 52 mL
Ultraflux AV600S 1.4 m2 100 mL
Ultraflux AV1000S 1.8 m2 130 mL
Ultraflux AVpaed 0.2 m2 18mL, luer-lock dialysate and filtrate ports


plasmaFlux - P1dry/P2dry

Steam-sterilized dry plasma filter with two-layer membrane structure and modelled membrane topology

  • Dry delivery enables simplified set-up with a shortening of the rinsing procedure
  • Dedicated pores allow free passage of protein components such as immunoglobulins, lipoproteins and also other big molecules with molecular weights even those exceeding two million Dalton
  • The membrane’s blood contact surface has a coarse-meshed topology that prevents blood cells from blocking fine pores; a stable filtration process at low TMP with excellent sieving coefficient is enabled
  • Passage of blood cells through the membrane is preventedThe surface layer inside of the capillary is surrounded and stabilized by a second homogeneous, fine-pored layer
  • Fresenius Polysulfone membrane offers excellent biocompatibility

Two-layer membrane structure of P1dry/P2dry plasmafilter

Electron micrograph of plasmafilters
Left: Electron micrograph of P1dry/P2dry capillary with view into hollow fiber. Right: Magnified to show inner surface and cross-section of two layer membrane.
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