Fresenius Medical Care Deutschland Gmbh

Torsten Keller

Gerhard Wiesen

Roland Sander

Igor Raiko

Rainer Fislage

Michael Paul

Stefan Konrad Marterstock

Christian Finkler

Jens-Holger Stahl

Klaus Heilmann

Franz Kugelmann

Wolfgang Wehmeyer

Benedict Glaser

Sebastian Meisinger

Holger Lichau

Jens Holger Stahl

Eric Sommer

Thomas Heinz

James Kennedy

The present invention relates to an apparatus and a method for preparing dialyzate, wherein the apparatus has a first part and a second part that is configured as a circuit; wherein the first part comprises a water connection or a water container as well as the primary side of a filter; wherein the filter is configured to prepare purified water from the water through forward osmosis; and wherein the second part comprises the secondary side of the filter, a reservoir, a filtrate line that leads from the secondary side of the filter to the reservoir, and a line leading from the reservoir to the secondary side of the filter, with the reservoir being a container having means for connecting the container to a dialysis machine.

Apparatus and method for preparing dialyzate

The invention relates to a method for manufacturing a hollow fiber membrane bundle from a plurality of polysulfone and PVP-based hollow fiber membranes which encompasses the providing of a spinning solution comprising a polysulfone-based material, in particular polysulfone, a vinylpyrrolidone-based polymer, in particular polyvinylpyrrolidone, an aprotic solvent, in particular dimethylacetamide, providing a coagulant liquid comprising water and an aprotic solvent, in particular dimethylacetamide, co-extruding the spinning solution and the coagulant liquid through a concentric annular spinneret into a hollow strand, whereby the cavity of the strand is filled with coagulant liquid, conducting the strand through a precipitation gap, introducing the strand into a precipitating bath comprised substantially of water so as to obtain a hollow fiber membrane, conducting the hollow fiber membranes through at least one rinsing bath and drying the hollow fiber membrane obtained, arranging the resulting hollow fiber membranes into a hollow fiber membrane bundle, and treating the hollow fiber membrane bundle with water vapor.

Hollow fibre membrane with improved separating efficiency, and production of a hollow fibre membrane with improved separating efficiency

A spinning nozzle is provided for the extrusion of a hollow fiber from one or more spinning masses. An apparatus that includes a spinning nozzle, and a method for extruding a hollow fiber using the spinning nozzle, are also provided. The spinning nozzle has an inlet port for each spinning mass to be extruded. The inlet port is for introducing the spinning mass into the spinning nozzle. An outlet port for the exit of a spinning mass along an outlet axis, is also provided. A spinning mass flow channel is used to guide the spinning mass from the inlet port to the outlet port. The spinning mass flow channel includes a flow manipulation section having an inlet and an outlet and includes a flow-guiding structure for influencing a spinning mass through the spinning mass flow channel.

Spinneret, device having a spinneret, method for producing a hollow fiber or hollow fiber membrane by means of a spinneret and filter

The present invention relates to a method and to an apparatus for preparing a dialysis solution, wherein the apparatus has a first circuit and a second circuit, wherein the first circuit has a container for receiving the consumed dialysis solution or fresh water or another fluid, the primary side of a filter connected downstream of the container, and a return line from the primary side of the filter into the container, wherein the filter is configured to prepare purified water from the consumed dialysis solution or from fresh water or from another fluid, and wherein the second circuit has the secondary side of the filter, the dialyzate side of a dialyzer, a reservoir, a line that leads from the reservoir to the secondary side of the filter, by means of which dialyzate or a dialyzate concentrate can be supplied to the secondary side of the filter, and a filtrate line that leads away from the secondary side of the filter.

Apparatus and method for preparing a dialysis solution

The invention relates to an undulated thermostable hollow fiber membrane of reduced wall thickness, wherein the wall thickness amounts to 20 &#x3bc;m or greater and 30 &#x3bc;m or less and the waveform of the hollow fiber membrane exhibits a wavelength in the range of from more than 1 mm and less than 5 mm. In particular, the invention relates to a method for producing an undulated thermostable hollow fiber membrane of lower wall thickness.

Hollow fiber membrane having improved diffusion properties

The present invention relates to a membrane, in particular to a hollow fiber membrane comprising a membrane, comprising at least two layers, wherein the at least two layers each comprise at least one layer forming material comprising at least one polymer and the at least two layers differ from each other with respect to the layer forming material, wherein the at least two layers are at least partly covalently and delamination free bonded to each other. The present invention relates furthermore to a method of production of the said membrane as well as to its use.

Delamination free membrane

A filter module includes a first filter stage and a second filter stage which are substantially concentrically arranged. The first filter stage and the second filter stage each include a plurality of hollow fiber membranes having a first fiber end and a second fiber end, which are embedded in a respective casting compound. The first filter stage is a filter stage for the filtration of a first medical fluid, and the second filter stage is a filter stage for the filtration of a second medical fluid. The first filter stage has unilaterally closed fiber ends, and is surrounded by a boundary element which separates the first filter stage and the second filter stage from one another. The boundary element has at least one opening which provides fluid communication between the first filter stage and the second filter stage.

Filter module

A hollow fiber membrane made of two coextruded layers A and B, wherein layer B has a non-woven type structure having a mesh size of 0.1 to 10 &#x3bc;m and layer A has a porous structure. A method for producing a membrane according to the invention and the use thereof is also disclosed.

Hollow fiber capillary membrane and method for the production thereof

A method of manufacturing a hollow fiber spinning nozzle in which supply bores and a nozzle structure connected to these and having a mass discharge opening and a needle with a coagulation agent bore are formed in a base body. At least two plate-shaped bodies structured by means of micro-structure technology are joined together to form the base body.

Hollow-fiber spinning nozzle and method

A hollow fiber spinning nozzle in which supply bores and a nozzle structure connected to these and having a mass discharge opening and a needle with a coagulation agent bore are formed in a base body. At least two plate-shaped bodies structured by means of micro-structure technology are joined together to form the base body.

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Hermeskeil, Germany

Torsten Keller