Filter device, preferably a hollow fibre dialyser, comprising curled hollow fibres
OwnerKlaus Heilmann, Steffen Fritzscheinventors
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Abstract
The invention relates to a filter device, preferably for hemodialysis, that consists of a cylindrical filter housing and a bundle of curled hollow fibers. The bundle is arranged in the filter housing. According to the invention, the curled hollow fibers are provided with an essentially sinusoidal texture and a wavelength that is defined by means of certain limits. The invention also relates to a curled hollow fiber and a method for filling a hollow fiber dialyser.
Claims13
Filter device, preferably a hollow fiber dialyser for hemodialysis, consisting of a cylindrical filter housing and a bundle of curled hollow fibers arranged in it, characterized in that the hollow fibers have an essentially sinusoidal texture and are curled according to the following geometric pattern:
- 7 5 · d < λ < L 12 · 1 1 + 2 D L , ( 1 )
- whereby λ represents the wavelength of the curled hollow fiber,
- d represents the outer diameter of the hollow fiber,
- L represents the effective length of the hollow fiber, and
- D represents the diameter of the fiber bundle.
Curled hollow fiber for optional use in the shape of a bundle in filter devices, preferably hollow fiber dialysers, which may have various diameters D, from a minimum diameter DMIN up to a maximum diameter DMAX, characterized in that the curled hollow fiber has only one curl for the use in filter housings of various diameters, resulting from the following equations:
- 10 5 · d < λ < L 12 · 1 1 + 2 DMax L , ( 4 )
- whereby λ represents the wavelength of the curled hollow fiber,
- d represents the outer diameter of the hollow fiber,
- L represents the effective length of the hollow fibers, and
- DMAX represents the diameter of the fiber bundle for the fiber housing with the maximum interior diameter.
Dependencies are inferred from the claim text.