Fresenius Medical Care Deutschland Gmbh

Igor Raiko

Roland Sander

Klaus Heilmann

Torsten Keller

Steffen Fritzsche

Rainer Fislage

Gerhard Breith

Christian Finkler

Uwe Hahmann

Christian Sauerwald

Holger Lichau

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 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

The present invention relates to a composite hollow fiber capillary membrane in particular for exploiting the value of dialysate and a method for the production thereof as well as its use in particular in haemo and peritoneal dialysis.

Hollow fibre membrane

A hollow fiber filter device for dialysis having a housing and an end cap is described. The end cap is attached to an axial end of the housing, and has a curved channel in fluid communication with a fluid port, a fluid chamber having a flow path defined by a plurality of curved members connected to an upper interior surface. The distance between circumferentially adjacent curved members may decrease in a radially outward flow direction.

Filter device

A filter device for mass exchange between two media separated by a membrane is disclosed. The device provides for low-stress transfer of blood flow from the connection area of the filter device to the fibers of a hollow fiber bundle. Relatively uniform utilization of the fibers is provided by a membrane in the form of a hollow fiber bundle whose fiber cavities form a first flow space. At least one inflow or outflow chamber is connected to the first flow space for supplying a medium to the hollow fiber bundle or removing a medium from the hollow fiber bundle. The inflow or outflow chamber is adjacent to an essentially circular or semicircular channel which is designed to be open in the direction of the ends of the hollow fibers and is connected to an inlet or outlet of the filter device. The channel is arranged approximately centrally with the hollow fiber bundle.

A closure element for sterile closure of connections, in particular connections of filter modules for dialysis, hemofiltration or ultrafiltration is described. A closure element with a simple design that provides a reliable seal is formed by having the closure element include a wall with an automatically closing slit-shaped indentation which when closed creates a germ-proof seal. The sealing element is used for sterile closure of connections of medical items, as well as for the medical items themselves.

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St. Wendel, Germany

Igor Raiko