US20030155294A1 - Filter device, preferably a hollow fibre dialyser, comprising curled hollow fibres - Google Patents
Filter device, preferably a hollow fibre dialyser, comprising curled hollow fibres Download PDFInfo
- Publication number
- US20030155294A1 US20030155294A1 US10/204,181 US20418103A US2003155294A1 US 20030155294 A1 US20030155294 A1 US 20030155294A1 US 20418103 A US20418103 A US 20418103A US 2003155294 A1 US2003155294 A1 US 2003155294A1
- Authority
- US
- United States
- Prior art keywords
- hollow fiber
- fiber
- curled
- hollow
- filter device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/24—Dialysis ; Membrane extraction
- B01D61/28—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/021—Manufacturing thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/031—Two or more types of hollow fibres within one bundle or within one potting or tube-sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
- B01D69/084—Undulated fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/08—Flow guidance means within the module or the apparatus
Definitions
- the invention relates to filter devices, and more particularly to hollow fiber dialysers for hemodialysis having an essentially sinusoidal texture and curled geometric pattern.
- Hollow fiber dialysers of a common design have a cylindrical fiber bundle that is arranged in a cylindrical filter housing. Blood flows through the inside of the fibers, and the dialysate flows in the area between the fibers and the filter housing in a counter flow to the blood.
- the task of a dialyser is the exchange of matter through the wall of the hollow fibers.
- the blood usually flows at an even velocity within all fibers.
- the dialysate should be constantly exchanged externally of the hollow fibers. This way a permanently high concentration difference between the interior and exterior of the fibers is ensured as the driving force for a diffuse exchange of matter.
- both the inflow and outflow of the dialysate is connected with the externally positioned fibers of the fiber bundle. That is why it cannot be ensured initially that all fibers in the fiber bundle are flushed with the same amount of dialysate. If a laminar flow of the dialysate in the dialysate area is assumed, the entire dialysate can theoretically flow through between the fiber bundle and the housing without the dialysate entering into the bundle interior. The exchange surface provided by the hollow fiber bundle would not be utilized in this way. In this case, the dialysate flows on a route of the least resistance from the entrance along the fibers in-relating to the dialyser-axial direction toward the output.
- An oxygenator is described in EP 314581 B1 that has a hollow fiber membrane bundle in the cylindrical housing that is also crimped.
- Crimped or curled fibers of a wavelength of about 28 mm are used in known dialysers.
- the hollow fibers according to prior art with their crimping or curling are used independently of the geometric conditions of the dialyser.
- FIG. 1 shows a longitudinal section, or cross section, through a hollow fiber bundle.
- FIG. 2 shows an embodiment of the geometry of an individual hollow fiber according to the present invention.
- this task based on the generic filter device consisting of a cylindrical filter housing, and in which a bundle of curled hollow fibers is arranged, is solved in that the hollow fibers have an essentially sinusoidal texture, and are curled according to the following geometrical pattern: 5 ⁇ d ⁇ ⁇ ⁇ L 12 ⁇ 1 1 + 2 ⁇ D L , ( 1 )
- ⁇ represents the wavelength of the curled hollow fibers
- d represents the exterior diameter of the hollow fiber
- L represents the effective length of the hollow fibers
- D represents the diameter of the fiber bundle.
- the invention is based on the knowledge that the ratio of the fluid partial current flowing exterior of the fiber bundle flows to the fluid partial current that flows through the bundle depends on the ratio of the fiber bundle diameter to its utilized length, as well as on the flow resistances in axial direction (along the fibers) and in radial direction (lateral to the fibers in the direction of the bundle center).
- the hollow fibers have the following amplitude a of the essentially sinusoidal curling according to the following equation: d 5 ⁇ a ⁇ ⁇ 5 . ( 2 )
- the curling of the hollow fibers rotates in a circular pattern.
- the fiber allocation in the cylindrical filter housing can be between 60.5% and 70%, even more preferably from 60.5% to 67.5%. Dense packing with a seal by means of grouting in the end area of the hollow fiber bundle is possible with these packing densities.
- the fiber allocation in the cylindrical filter housing can be between 63.5% and 65.5%.
- the fiber allocation is calculated from the percentages of the cross section surface allocated by the fibers per utilizable cross section surface in the filter housing.
- the utilizable cross section surface is 0.907 times the cross section surface. This value is calculated from the maximum packing density (hexagonal arrangement), which should correspond to an allocation of 100%.
- the above stated allocation information can be achieved particularly with the use of the dimensions appropriate to this invention of the hollow fibers, and simultaneously ensure that the polyurethane matter evenly penetrates the fiber bundle with the grouting of the fibers similar to—as previously described—the dialysate evenly entering the interior of the bundle in the dialysis. Especially by the even penetration of the polyurethane matter, which subsequently solidifies and firmly fixes the fiber bundle as such at both ends, the simultaneous allocation of the fiber bundle, and therefore the previously mentioned high packing density can be achieved.
- the effect of the invention is also achieved by a combination of elongated flat and three-dimensionally curled fibers, if at least 10% of three-dimensionally curled fibers are used in the fiber bundle.
- the invention is based on a curled hollow fiber for optional use in the form of a bundle in hollow fiber dialysers that may have different diameters D, from a minimum diameter D MIN up to a maximum diameter D MAX .
- an optimal hollow fiber shape should be provided, if possible, which can be used for hollow fiber dialysers of various diameters.
- the curled hollow fiber for use in filter housings of various diameters is calculated from the following equation: 5 ⁇ d ⁇ ⁇ ⁇ L 12 ⁇ 1 1 + 2 ⁇ DMax L , ( 4 )
- ⁇ represents the wavelength of the curled hollow fiber
- d represents the diameter of the hollow fiber
- L represents the effective length of the hollow fibers
- D MAX represents the diameter of the fiber bundle for the fiber housing with the maximum interior diameter
- An example embodiment of the hollow fibers consists of 90 to 99 weight percent of a hydrophobic first polymer, and 10 to 1 weight percent of a hydrophilic second polymer, whereby the hydrophobic first polymers are selected from the following group: polyarylsulfons, polycarbonates, polyamides, polyvinyl chlorides, modified acrylic acid, polyether, polyurethane, or their co-polymers, and whereby the hydrophilic second polymers are selected from the following group: polyvinylpyrrolidon, polyethylene glycol, polyglycolmonoesther, co-polymers from polyethylene glycol with polypropylenglycol, water soluble derivatives of cellulose or polysorbates.
- This composition of microporous hollow fibers has already been described in detail in EP 0168783 A1, which also includes additional details for this example.
- the invention is also based on a method for filling a filter device, especially a hollow fiber dialyser, whereby the air present at the beginning of the filling operation in the exterior space, i.e., in the space surrounding the hollow fibers, is displaced by means of a fluid volume flow that is guided from top to bottom through the filter housing.
- the fluid volume flow for the filling of the filter housing is preferably approximately 500 ml/min.
- the system had to be filled from the bottom to the top at a vertical filter position for the air-free filling of said system.
- the dialyzing fluid pump and the blood pump discharge in reverse of one another, the filling of each chamber with dialyzing fluid according to prior art had to occur on the dialyser side, or with isotone salt solution successively on the blood side, whereby the filter had to be turned by 180° before performing the second step.
- This procedural step for the filling operation is no longer necessary with the new filter.
- the dialysate space can be filled from the top to the bottom. The filling can occur simultaneously with the filling on the blood side, without having to turn the dialyser.
- the invention relates to the use of the previously described filter device for the filling of the filter housing by means of a fluid volume flow that is guided through the filter housing from top to bottom.
- This use of the filter device enables a quick, and especially air-free filling of the system.
- the higher filling velocity results from the fact that both fluid chambers of the dialyser, i.e., the chambers on the dialyser side and on the blood side, can be filled simultaneously without having to turn the filter device.
- FIG. 1 shows a micro-curled hollow fiber bundle at the effective length L with the diameter D. It is arranged in a known and usual way in a filter housing that is not illustrated in detail. The construction of the filter device is generally extensively known, and is therefore not explained in detail.
- a known filter device exists, such as a hollow fiber dialyser, comprised of a tube-shaped housing that includes the hollow fiber bundle, whereby the ends of the hollow fiber bundle are connected at the ends of the tube-shaped housing by means of a compound.
- the housing is arranged in a limited way to the compounds with radial connectors, which form the inputs and outputs to the second flow area. For the opening of the capillary tubes of the hollow fiber bundle that are enclosed by the compounds, they are spliced at their ends.
- a sinusoidal texture is preferably created from hollow fiber membranes, whereby the wavelength ⁇ of the periodic structure is closely tied to the outer diameter d of the hollow fiber (compare FIG. 2), as well as with the effective fiber length L and the bundle diameter D (compare FIG. 1) of the fiber bundle.
- the optimal ⁇ is within the following range: 5 ⁇ d ⁇ ⁇ ⁇ L 12 ⁇ 1 1 + 2 ⁇ D L . ( 1 )
- amplitude In addition to the wavelength ⁇ , amplitude also plays a major role in the effectiveness of the micro-curling.
- the amplitude a (compare FIG. 2) should be within the following range: d 5 ⁇ a ⁇ ⁇ 5 . ( 2 )
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.
Description
- The invention relates to filter devices, and more particularly to hollow fiber dialysers for hemodialysis having an essentially sinusoidal texture and curled geometric pattern.
- Hollow fiber dialysers of a common design have a cylindrical fiber bundle that is arranged in a cylindrical filter housing. Blood flows through the inside of the fibers, and the dialysate flows in the area between the fibers and the filter housing in a counter flow to the blood. The task of a dialyser is the exchange of matter through the wall of the hollow fibers. The blood usually flows at an even velocity within all fibers. For an optimum of exchange effect, the dialysate should be constantly exchanged externally of the hollow fibers. This way a permanently high concentration difference between the interior and exterior of the fibers is ensured as the driving force for a diffuse exchange of matter.
- In a common design dialyser, both the inflow and outflow of the dialysate is connected with the externally positioned fibers of the fiber bundle. That is why it cannot be ensured initially that all fibers in the fiber bundle are flushed with the same amount of dialysate. If a laminar flow of the dialysate in the dialysate area is assumed, the entire dialysate can theoretically flow through between the fiber bundle and the housing without the dialysate entering into the bundle interior. The exchange surface provided by the hollow fiber bundle would not be utilized in this way. In this case, the dialysate flows on a route of the least resistance from the entrance along the fibers in-relating to the dialyser-axial direction toward the output.
- From DE 2851687 C2 it is known that the hollow fibers are designed curled, or crimped for an improved penetration of the hollow fiber bundle by the fluid flowing externally of the hollow fibers.
- From U.S. Pat. No. 3,616,928 a matter exchange apparatus with crimped hollow fiber bundles is also known.
- An oxygenator is described in EP 314581 B1 that has a hollow fiber membrane bundle in the cylindrical housing that is also crimped.
- Crimped or curled fibers of a wavelength of about 28 mm are used in known dialysers. The hollow fibers according to prior art with their crimping or curling are used independently of the geometric conditions of the dialyser.
- In order to increase the performance of the dialyser, solution approaches already exist in which other fibers have been added to the dialysis fibers in the bundle.
- Other solutions intend to wind or knot small bundles of dialysis fibers with a thread, and to combine these small bundles to large bundles. This should enable an improved through flow of the hollow fiber bundle through the fluid flushing the hollow fibers, i.e., the dialysate in the case of a dialyser.
- FIG. 1 shows a longitudinal section, or cross section, through a hollow fiber bundle.
- FIG. 2 shows an embodiment of the geometry of an individual hollow fiber according to the present invention.
- It is the task of the invention to make available a generic filter device, such as a hollow fiber dialyser, in which the fluid flow through the hollow fiber bundle and the fluid flow external to the hollow fibers is as even as possible, and the exchange of matter is therefore optimized.
- According to the invention, this task, based on the generic filter device consisting of a cylindrical filter housing, and in which a bundle of curled hollow fibers is arranged, is solved in that the hollow fibers have an essentially sinusoidal texture, and are curled according to the following geometrical pattern:
- whereby λ represents the wavelength of the curled hollow fibers, d represents the exterior diameter of the hollow fiber, L represents the effective length of the hollow fibers, and D represents the diameter of the fiber bundle.
- Through the geometric-based definition of the curling of the individual hollow fibers of the hollow fiber bundle, the flow resistance in axial direction, i.e., along the fibers, increased relative to the flow resistance into the interior of the bundle is achieved. The latter flow resistance value is generally even absolutely reduced. The result is that the part of the dialysate that flows through the interior of the bundle in a dialysis is increased, and the hollow fibers positioned in the interior are better utilized. This achieves an increased performance of matter exchange in comparison to long-wave curled fibers, or fibers completely without curling. The creation of a turbulent flow of the fluid flushing the hollow fiber, as well as the fluid distribution resulting from this, should be responsible as such for this purpose. The invention is based on the knowledge that the ratio of the fluid partial current flowing exterior of the fiber bundle flows to the fluid partial current that flows through the bundle depends on the ratio of the fiber bundle diameter to its utilized length, as well as on the flow resistances in axial direction (along the fibers) and in radial direction (lateral to the fibers in the direction of the bundle center).
- In addition to the wavelength λ, the amplitude a plays an additional role in the effectiveness of the hollow fiber curling. Therefore, according to a preferred embodiment of the invention, the hollow fibers have the following amplitude a of the essentially sinusoidal curling according to the following equation:
- If a falls below the value of d/5, the space between two values next to each other (wave consumption) becomes too small to conduct the necessary dialysate amount into the interior of the fiber bundle. However, if a>λ/5 is selected, the dialyser loses effectiveness due to the fact that the possible packing density of the fiber bundle is reduced in a predetermined dialyser housing.
-
- whereby: 0.05<u<0.14, and whereby {overscore (χ)}(z) represents the space vector between the coordinate origin and the spatial position of a hollow fiber that extends along the z-axis, and u represents the amount of rotations per wavelength λ.
- Corresponding to the previously mentioned equation, the curling of the hollow fibers rotates in a circular pattern. This means that the mathematical vector of the amplitude that is based on the z-axis and ends at the fiber, runs through a certain angle area within the distance λ. This creates a three-dimensional structure similar to a helix. While it may happen in a two-dimensional structure that all fibers “fall over,” and thereby form an isotropic structure that makes the penetration of the dialysate into the bundle dependent upon the direction, a three-dimensionally curled fiber bundle is isotropic, and ensures the even penetration of the dialysate into the interior of the bundle from all sides.
- Preferably, the fiber allocation in the cylindrical filter housing can be between 60.5% and 70%, even more preferably from 60.5% to 67.5%. Dense packing with a seal by means of grouting in the end area of the hollow fiber bundle is possible with these packing densities.
- Particularly advantageous, the fiber allocation in the cylindrical filter housing can be between 63.5% and 65.5%. The fiber allocation is calculated from the percentages of the cross section surface allocated by the fibers per utilizable cross section surface in the filter housing. The utilizable cross section surface is 0.907 times the cross section surface. This value is calculated from the maximum packing density (hexagonal arrangement), which should correspond to an allocation of 100%. The above stated allocation information can be achieved particularly with the use of the dimensions appropriate to this invention of the hollow fibers, and simultaneously ensure that the polyurethane matter evenly penetrates the fiber bundle with the grouting of the fibers similar to—as previously described—the dialysate evenly entering the interior of the bundle in the dialysis. Especially by the even penetration of the polyurethane matter, which subsequently solidifies and firmly fixes the fiber bundle as such at both ends, the simultaneous allocation of the fiber bundle, and therefore the previously mentioned high packing density can be achieved.
- The effect of the invention is also achieved by a combination of elongated flat and three-dimensionally curled fibers, if at least 10% of three-dimensionally curled fibers are used in the fiber bundle.
-
- whereby λ represents the wavelength of the curled hollow fiber, d represents the 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.
- An example embodiment of the hollow fibers consists of 90 to 99 weight percent of a hydrophobic first polymer, and 10 to 1 weight percent of a hydrophilic second polymer, whereby the hydrophobic first polymers are selected from the following group: polyarylsulfons, polycarbonates, polyamides, polyvinyl chlorides, modified acrylic acid, polyether, polyurethane, or their co-polymers, and whereby the hydrophilic second polymers are selected from the following group: polyvinylpyrrolidon, polyethylene glycol, polyglycolmonoesther, co-polymers from polyethylene glycol with polypropylenglycol, water soluble derivatives of cellulose or polysorbates. This composition of microporous hollow fibers has already been described in detail in EP 0168783 A1, which also includes additional details for this example.
- Additional examples for the embodiment of the hollow fibers regarding their composition and morphology are found in EP 0 305 787 A1, as well as in the published application DE 21 45 183. We expressly refer to the disclosure of these applications.
- The invention is also based on a method for filling a filter device, especially a hollow fiber dialyser, whereby the air present at the beginning of the filling operation in the exterior space, i.e., in the space surrounding the hollow fibers, is displaced by means of a fluid volume flow that is guided from top to bottom through the filter housing. The fluid volume flow for the filling of the filter housing is preferably approximately 500 ml/min. Surprisingly it has been shown that both fluid chambers of the dialyser can be filled by means of the construction of the hollow fiber dialyser as described above, without having to turn the dialyser by 180°.
- According to prior art, in which the fiber bundle was not constructed as evenly and as densely packed, as it is possible according to the invention at hand, the system had to be filled from the bottom to the top at a vertical filter position for the air-free filling of said system. As for the dialyzing fluid pump, and the blood pump discharge in reverse of one another, the filling of each chamber with dialyzing fluid according to prior art had to occur on the dialyser side, or with isotone salt solution successively on the blood side, whereby the filter had to be turned by 180° before performing the second step. This procedural step for the filling operation is no longer necessary with the new filter. The dialysate space can be filled from the top to the bottom. The filling can occur simultaneously with the filling on the blood side, without having to turn the dialyser.
- Finally, the invention relates to the use of the previously described filter device for the filling of the filter housing by means of a fluid volume flow that is guided through the filter housing from top to bottom. This use of the filter device enables a quick, and especially air-free filling of the system. The higher filling velocity results from the fact that both fluid chambers of the dialyser, i.e., the chambers on the dialyser side and on the blood side, can be filled simultaneously without having to turn the filter device.
- FIG. 1 shows a micro-curled hollow fiber bundle at the effective length L with the diameter D. It is arranged in a known and usual way in a filter housing that is not illustrated in detail. The construction of the filter device is generally extensively known, and is therefore not explained in detail. Generally, a known filter device exists, such as a hollow fiber dialyser, comprised of a tube-shaped housing that includes the hollow fiber bundle, whereby the ends of the hollow fiber bundle are connected at the ends of the tube-shaped housing by means of a compound. In this filter device, the housing is arranged in a limited way to the compounds with radial connectors, which form the inputs and outputs to the second flow area. For the opening of the capillary tubes of the hollow fiber bundle that are enclosed by the compounds, they are spliced at their ends.
- Sealing caps are then placed on the ends of the tube-shaped jackets that are equipped with connectors, which form the inputs and outputs of the first flow area.
- Reference is made to the disclosure of DE 198 57 850 and EP-A-0844015.
- According to the invention, a sinusoidal texture is preferably created from hollow fiber membranes, whereby the wavelength λ of the periodic structure is closely tied to the outer diameter d of the hollow fiber (compare FIG. 2), as well as with the effective fiber length L and the bundle diameter D (compare FIG. 1) of the fiber bundle. The optimal λ is within the following range:
- According to equation 1 it is not appropriate to choose a wavelength that is smaller than five times the outer diameter d of the fiber (FIG. 2). This can be explained by the fact that, falling short of 5 d, wave loops are no longer created in the hollow fiber that enable the dialysate to enter the interior of the fibers. The wavelength λ is limited in the upper range by means of the effectiveness in the performance increase. It was surprisingly found that the presence of 12 wavelengths per fiber length L is sufficient for “thin dialysers,” i.e., diameter to length ratios of D/L <0.14, in common fiber diameters. In the case of “thicker dialysers” with an unfavorable ratio of diameter to length, i.e., of D/L, it becomes more difficult for the dialysate to reach the center of the fiber bundle at the same wavelength λ. In order to compensate for this, the geometry for the calculation of the maximum wavelength by the factor 1/(1+2 D/L) is considered in the equation.
- If the same wavelength λis to be used for all dialyser sizes for a hollow fiber, the equation (1) D must be replaced by the maximum diameter DMAX. Here a penetration of the fiber bundle is ensured even with unfavorable diameter to length conditions, especially when the dialysate flows through comparably narrower dialysers.
- For dialysis fibers with a diameter of d=0.28 mm, and the dialyser with the largest thickness, having an effective length of L=225 mm, and a maximum inner diameter DMAX of=48 mm, a range of
- 1.4 mm<λ<13.1 mm
- is created for the wavelength λ.
- In practical applications, values for the wavelength λ of
- 4 mm<λ<12 mm
- have proven particularly effective.
-
- If a falls short of the value of d/5, the space between two adjoining waves becomes too small in order to feed the required amount of dialysate into the interior of the fiber bundle.
- However, if a is larger than λ/5, a comparatively smaller packing density is put up with, which leads to a decrease of the effectiveness of the matter exchange.
- By means of the so-called micro-curling, it is ensured that the dialysate is fed everywhere along the hollow fibers into the hollow fiber interior through the wave loops, and the flow along the hollow fibers is simultaneously always re-directed and decelerated. In this way, an optimal matter exchange can occur along the exchange surface.
- Particular benefits arise from the use of the hollow fibers equipped with the previously mentioned micro-curling in the shape of a tightly packed fiber bundle, in particular corresponding to the previously discussed packing density, as a filter device with such a hollow fiber package can be filled more easily. Here, both fluid chambers, namely the one on the dialysate side, as well as the chamber on the blood side, can be filled simultaneously, and especially air-free. This results in a decisive advantage as opposed to the current prior art, in which the chamber for the dialysis fluid, and the chamber on the blood side must be filled successively, whereby the filter device additionally had to be turned by 180 degrees for an air-free filling. This was due to a complicated handling procedure, which is no longer necessary with the use of the micro-curled hollow fiber in the filter device described herein.
Claims (13)
1. 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:
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.
3. Filter device according to claims 1 or 2, characterized in that the curling of the hollow fiber has a three-dimensional position according to the following formula:
whereby the following is true:
0.05<u<0.14, and whereby
{overscore (χ)}(z) represents the space vector between the coordinate origin and the spatial position of a hollow fiber that extends along the z-axis, and
u represents the amount of rotations per wavelength λ.
4. Filter device according to one of the claims 1 to 3 , characterized in that the fiber allocation in the cylindrical filter housing is 60.5% to 70%.
5. Filter device according to one of the claims 1 to 4 , characterized in that the fiber allocation in the cylindrical filter housing is 60.5% to 67.5%.
6. Filter device according to one of the claims 1 to 5 , characterized in that the fiber allocation in the cylindrical filter housing is between 63.5% and 65.5%.
7. Filter device according to one of the claims 1 to 6 , characterized in that at least 10% of the hollow fibers are three-dimensional curled hollow fibers.
8. 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:
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.
9. Curled hollow fiber according to claim 8 , characterized in that the curling of the hollow fiber has a three-dimensional position according to the following formula:
whereby the following is true:
0.05<u<0.14, and whereby {overscore (χ)}(z) represents the space vector between the coordinate origin and the spatial position of a hollow fiber that extends along the z-axis, and u represents the amount of rotations per wavelength λ.
10. Curled hollow fiber according to claims 8 or 9, characterized in that it consists of 90 to 99 weight percent of a hydrophobic first polymer, and 10 to 1 weight percent of a hydrophilic second polymer, whereby the hydrophobic first polymers are selected from the following group: polyarylsulfons, polycarbonates, polyamides, polyvinyl chlorides, modified acrylic acid, polyether, polyurethane, or their co-polymers, and whereby the hydrophilic second polymers are selected from the following group: polyvinylpyrrolidon, polyethylene glycol, polyglycolmonoesther, co-polymers from polyethylene glycol with polypropylenglycol, water soluble derivatives of cellulose or polysorbates.
11. Method for the filling of a filter device, especially a hollow fiber dialyser, according to one of the claims 1 to 7 , characterized in that the air present at the beginning of the filling operation in the exterior space, i.e., in the space surrounding the hollow fibers, is displaced by means of a fluid volume flow that is guided from top to bottom through the filter housing.
12. Method according to claim 11 , characterized in that the fluid volume flow is approximately 500 ml/min.
13. Use of a filter device according to one of the claims 1 to 7 for the filling of the filter housing by means of a fluid volume flow that is guided from top to bottom through the filter housing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/725,098 US8202428B2 (en) | 2000-02-17 | 2010-03-16 | Filter device, preferably a hollow fiber dialyser with curled hollow fibers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10007327A DE10007327A1 (en) | 2000-02-17 | 2000-02-17 | Filter device, preferably hollow fiber dialyzer with curled hollow fibers |
DE10007327.1 | 2000-02-17 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/725,098 Continuation US8202428B2 (en) | 2000-02-17 | 2010-03-16 | Filter device, preferably a hollow fiber dialyser with curled hollow fibers |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030155294A1 true US20030155294A1 (en) | 2003-08-21 |
Family
ID=7631359
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/204,181 Abandoned US20030155294A1 (en) | 2000-02-17 | 2001-02-16 | Filter device, preferably a hollow fibre dialyser, comprising curled hollow fibres |
US12/725,098 Expired - Lifetime US8202428B2 (en) | 2000-02-17 | 2010-03-16 | Filter device, preferably a hollow fiber dialyser with curled hollow fibers |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/725,098 Expired - Lifetime US8202428B2 (en) | 2000-02-17 | 2010-03-16 | Filter device, preferably a hollow fiber dialyser with curled hollow fibers |
Country Status (15)
Country | Link |
---|---|
US (2) | US20030155294A1 (en) |
EP (2) | EP1671695B2 (en) |
JP (1) | JP4584522B2 (en) |
KR (1) | KR100697677B1 (en) |
CN (2) | CN1238096C (en) |
AT (1) | ATE327808T1 (en) |
AU (1) | AU776506B2 (en) |
BR (1) | BRPI0108451B1 (en) |
CA (1) | CA2400773C (en) |
DE (2) | DE10007327A1 (en) |
DK (2) | DK1671695T4 (en) |
ES (2) | ES2261380T3 (en) |
MX (1) | MXPA02008024A (en) |
PT (2) | PT1257333E (en) |
WO (1) | WO2001060477A2 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080237127A1 (en) * | 2004-08-06 | 2008-10-02 | Asahi Kasei Medical Co. Ltd. | Polysulfone Hemodialyzer |
US20100000936A1 (en) * | 2007-01-30 | 2010-01-07 | Toray Industries, Inc | Hollow-fiber membrane and hollow-fiber membrane module having the same included therein |
US20100270232A1 (en) * | 2007-12-27 | 2010-10-28 | Toray Industries, Inc. | Fiber construct for treating biological components |
US20110120932A1 (en) * | 2008-08-22 | 2011-05-26 | Gambro Lundia Ab | Diffusion and/or filtration device |
US8771516B2 (en) | 2009-05-20 | 2014-07-08 | Gambro Lundia Ab | Membranes having improved performance |
WO2014119976A1 (en) * | 2013-02-04 | 2014-08-07 | 코오롱인더스트리 주식회사 | Hollow fibre membrane and hollow fibre membrane module including same |
US8827087B2 (en) | 2009-05-20 | 2014-09-09 | Gambro Lundia Ab | Membranes having improved performance |
US11541355B2 (en) | 2016-10-24 | 2023-01-03 | Fresenius Medical Care Deutschland Gmbh | Method for determining a permeation property of hollow fibre membrane bundles |
US11628407B2 (en) * | 2017-03-17 | 2023-04-18 | Fresenius Medical Care Deutschland Gmbh | Hollow fiber membrane having improved diffusion properties |
EP4063004A4 (en) * | 2019-11-20 | 2023-11-15 | Nipro Corporation | Hollow fiber membrane module |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10007327A1 (en) | 2000-02-17 | 2001-08-30 | Fresenius Medical Care De Gmbh | Filter device, preferably hollow fiber dialyzer with curled hollow fibers |
CA2473246A1 (en) * | 2002-01-29 | 2003-08-07 | Amersham Biosciences Membrane Separations Corp. | Convoluted surface hollow fiber membranes |
KR101052372B1 (en) | 2003-04-23 | 2011-07-28 | 아사히 카세이 쿠라레 메디칼 가부시키가이샤 | Hollow Fiber Membrane Fluid Processor |
WO2005044428A1 (en) * | 2003-11-07 | 2005-05-19 | Gambro Lundia Ab | End-cap assembly with pump hose for a filter and filter comprising such an end-cap assembly |
JP4599934B2 (en) * | 2004-08-10 | 2010-12-15 | 東洋紡績株式会社 | Hollow fiber membrane module |
EP2253369B1 (en) | 2009-05-20 | 2011-11-09 | Gambro Lundia AB | Membranes having improved performance |
EP2253368B1 (en) | 2009-05-20 | 2011-11-02 | Gambro Lundia AB | Membranes having improved performance |
EP2556849A1 (en) | 2011-08-08 | 2013-02-13 | Gambro Lundia AB | Separation material |
EP2556848A1 (en) | 2011-08-08 | 2013-02-13 | Gambro Lundia AB | Separation material comprising saccharide ligands |
EP2567750B1 (en) | 2011-09-08 | 2014-12-24 | Gambro Lundia AB | Hollow fiber membrane |
CN202740496U (en) | 2012-06-21 | 2013-02-20 | 甘布罗伦迪亚股份公司 | Capillary dialyzer |
EP2735358B1 (en) | 2012-11-22 | 2018-01-10 | Gambro Lundia AB | Capillary dialyzers |
ES2625510T3 (en) | 2012-11-26 | 2017-07-19 | Gambro Lundia Ab | Liver support system |
ES2626754T3 (en) | 2012-11-26 | 2017-07-25 | Gambro Lundia Ab | Adsorption device that combines beads and hollow fiber membranes |
EP2735359B1 (en) | 2012-11-26 | 2017-02-08 | Gambro Lundia AB | Integrated device for liver support systems |
US20140263062A1 (en) | 2013-03-14 | 2014-09-18 | Fresenius Medical Care Holdings, Inc. | Universal portable machine for online hemodiafiltration using regenerated dialysate |
US9433720B2 (en) | 2013-03-14 | 2016-09-06 | Fresenius Medical Care Holdings, Inc. | Universal portable artificial kidney for hemodialysis and peritoneal dialysis |
EP2815807A1 (en) | 2013-06-20 | 2014-12-24 | Gambro Lundia AB | Capillary dialyzer comprising crimped hollow fibres |
EP2845641B1 (en) | 2013-09-05 | 2018-05-09 | Gambro Lundia AB | Permselective asymmetric membranes with high molecular weight polyvinylpyrrolidone, the preparation and use thereof |
EP2878362B1 (en) | 2013-12-02 | 2018-07-04 | Gambro Lundia AB | Capillary dialyzers |
KR102431427B1 (en) | 2014-02-06 | 2022-08-10 | 감브로 룬디아 아베 | Membrane for blood purification |
US10661230B2 (en) * | 2014-02-06 | 2020-05-26 | Gambro Lundia Ab | Hemodialyzer for blood purification |
CZ305152B6 (en) | 2014-02-13 | 2015-05-20 | Zena S. R. O. | Heat-exchange apparatus formed by hollow polymer fibers |
WO2015153370A2 (en) | 2014-03-29 | 2015-10-08 | Labib Mohamed E | Blood processing cartridges and systems, and methods for extracorporeal blood therapies |
EP2939731B1 (en) | 2014-04-30 | 2018-10-03 | Gambro Lundia AB | UV-irradiated hollow fiber membranes |
JP6480956B2 (en) * | 2015-01-07 | 2019-03-13 | 旭化成メディカル株式会社 | Filter, ascites treatment system and ascites treatment method |
KR101766011B1 (en) * | 2015-04-30 | 2017-08-07 | 현대자동차주식회사 | Humidification device for fuel cell |
CN104906972A (en) * | 2015-05-20 | 2015-09-16 | 苏州市贝克生物科技有限公司 | Nano-grade titanium dioxide/polyether hemodialysis membrane and preparation method thereof |
US10426884B2 (en) | 2015-06-26 | 2019-10-01 | Novaflux Inc. | Cartridges and systems for outside-in flow in membrane-based therapies |
EP3352888B8 (en) | 2015-09-24 | 2022-01-12 | Princeton Trade and Technology Inc. | Cartridges for hollow fibre membrane-based therapies |
DE102016002440A1 (en) * | 2016-03-01 | 2017-09-07 | Fresenius Medical Care Deutschland Gmbh | Hollow fiber membrane with three-dimensional curl |
EP3290100B1 (en) | 2016-08-31 | 2020-08-19 | Gambro Lundia AB | Diffusion and/or filtration device |
EP3290067B1 (en) | 2016-09-06 | 2021-03-03 | Gambro Lundia AB | Liver support system |
DE102016012730A1 (en) | 2016-10-24 | 2018-04-26 | Fresenius Medical Care Deutschland Gmbh | Method for determining a permeation property of hollow fiber membranes |
EP3388139A1 (en) | 2017-04-13 | 2018-10-17 | Gambro Lundia AB | Optimized hemodialyzer for blood purification |
EP3495033A1 (en) | 2017-12-11 | 2019-06-12 | Gambro Lundia AB | Capillary dialyzer |
EP3669888A1 (en) | 2018-12-20 | 2020-06-24 | Gambro Lundia AB | Extracorporeal devices for methods for treating diseases associated with anti-neutrophil cytoplasmic antibodies |
CN112245691A (en) | 2019-07-22 | 2021-01-22 | 巴克斯特医疗保健股份有限公司 | Method and system for preparing dialysate from raw water |
US11013841B2 (en) | 2019-09-28 | 2021-05-25 | Choon Kee Lee | Centrifugal-dialysate-flow hemodializer |
US11071951B2 (en) | 2019-09-29 | 2021-07-27 | Choon Kee Lee | Centrifugal gradient dialysate dual-chamber hemodiafiltrator |
EP3838384A1 (en) | 2019-12-21 | 2021-06-23 | Gambro Lundia AB | Fiber bundle handover |
US11040128B1 (en) | 2020-01-25 | 2021-06-22 | Choon Kee Lee | Integrated motorized hemodialyzer |
CN112915803A (en) * | 2021-01-12 | 2021-06-08 | 宁波方太厨具有限公司 | Preparation method of microwave wave-shaped hollow fiber nanofiltration membrane |
DE102021112315A1 (en) | 2021-05-11 | 2022-11-17 | Fresenius Medical Care Deutschland Gmbh | Hollow fiber membrane filter with improved separation properties |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4293418A (en) * | 1979-03-28 | 1981-10-06 | Toray Industries, Inc. | Fluid separation apparatus |
US4336138A (en) * | 1975-07-26 | 1982-06-22 | Toyobo Co., Ltd. | Permeation separation apparatus |
US4352736A (en) * | 1980-12-08 | 1982-10-05 | Toyo Boseki Kabushiki Kaisha | Wound flattened hollow fiber assembly having plural spaced core sections |
US4906375A (en) * | 1984-07-14 | 1990-03-06 | Fresenius, Ag | Asymmetrical microporous hollow fiber for hemodialysis |
US5470659A (en) * | 1983-01-17 | 1995-11-28 | Akzo Nv | Hollow fibers |
US5489382A (en) * | 1987-10-29 | 1996-02-06 | Terumo Kabushiki Kaisha | Oxygenator using porous hollow fiber membrane |
US5779897A (en) * | 1996-11-08 | 1998-07-14 | Permea, Inc. | Hollow fiber membrane device with inert filaments randomly distributed in the inter-fiber voids |
US6074559A (en) * | 1996-11-21 | 2000-06-13 | Fresenius Medical Care Deutschland Gmbh | Filter device having a hollow fiber bundle and associated sealing devices |
US6322703B1 (en) * | 1999-04-20 | 2001-11-27 | Asahi Kasei Kabushiki Kaisha | Method for purifying aqueous suspension |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3616928A (en) * | 1969-10-02 | 1971-11-02 | Du Pont | Permeation separation device for separating fluids |
BE771649A (en) | 1970-09-09 | 1971-12-31 | Fives Lille Cail | TUBULAR AND ROTATING OVEN OR HEAT EXCHANGER WITH AT LEAST AN AREA REINFORCED BY AN ANNULAR STRUCTURE |
JPS5073882A (en) * | 1973-11-02 | 1975-06-18 | ||
IN149938B (en) * | 1977-11-30 | 1982-06-12 | Monsanto Co | |
DE2842958A1 (en) * | 1978-10-02 | 1980-04-10 | Akzo Gmbh | Dialysis membrane comprising hollow cellulose fibre - with improved exchange surface in wavy form, mfd. from cuprammonium soln. of cellulose |
US4324662A (en) * | 1979-12-28 | 1982-04-13 | Baxter Travenol Laboratories, Inc. | Flow reversal in a dialyzer |
US4331540A (en) * | 1980-04-21 | 1982-05-25 | Baxter Travenol Laboratories, Inc. | Process for draining dialysate from artificial kidney |
JPS57194007A (en) * | 1981-05-26 | 1982-11-29 | Nitsushiyoo:Kk | Hollow yarn type permeating device |
JPS5884007A (en) | 1981-11-14 | 1983-05-20 | Toyobo Co Ltd | Hollow fibrous membrane for dialysis and its production |
DE3426331A1 (en) * | 1984-07-17 | 1986-01-30 | 6380 Bad Homburg Fresenius AG | ASYMMETRIC MICROPOROUS HOLLOW FIBER FOR HAEMODIALYSIS AND METHOD FOR THE PRODUCTION THEREOF |
JPS6245709A (en) | 1985-08-21 | 1987-02-27 | Teijin Ltd | Permselective hollow yarn and fluid separator |
SE460521B (en) | 1987-08-31 | 1989-10-23 | Gambro Dialysatoren | PERMSELECTIVE ASYMMETRIC MEMBRANE AND PROCEDURES FOR ITS PREPARATION |
JPH067859B2 (en) * | 1987-10-29 | 1994-02-02 | テルモ株式会社 | Porous hollow fiber membrane and hollow fiber membrane oxygenator |
JPH01219710A (en) | 1988-02-26 | 1989-09-01 | Canon Inc | Zoom lens |
US5110477A (en) * | 1990-02-13 | 1992-05-05 | Howard David B | Dialyzer clearance check system |
JPH0553592A (en) | 1991-08-29 | 1993-03-05 | Pioneer Electron Corp | Orchestral accompaniment system |
JP3001774B2 (en) * | 1994-06-28 | 2000-01-24 | 帝人株式会社 | Method for producing hollow fiber membrane for blood |
EP0705611A2 (en) * | 1994-09-07 | 1996-04-10 | David S. Utterberg | Separable hemodialysis system |
JPH08110594A (en) | 1994-10-13 | 1996-04-30 | Toshiba Corp | Image forming device |
US5650071A (en) * | 1995-06-07 | 1997-07-22 | Cobe Laboratories, Inc. | Technique for priming and recirculating fluid through a dialysis machine to prepare the machine for use |
JPH09266947A (en) * | 1996-04-02 | 1997-10-14 | Teijin Ltd | Hollow fiber membrane and module for dialysis |
JPH09273315A (en) | 1996-04-08 | 1997-10-21 | Japan Drive-It Co Ltd | Positioning tool for fitting hole of reinforcing steel plate |
JPH1190187A (en) * | 1997-09-22 | 1999-04-06 | Nok Corp | Hollow fiber membrane module |
DE19857850C2 (en) * | 1998-12-15 | 2003-02-06 | Fresenius Medical Care De Gmbh | filter means |
DE10007327A1 (en) | 2000-02-17 | 2001-08-30 | Fresenius Medical Care De Gmbh | Filter device, preferably hollow fiber dialyzer with curled hollow fibers |
-
2000
- 2000-02-17 DE DE10007327A patent/DE10007327A1/en not_active Ceased
-
2001
- 2001-02-16 KR KR1020027010137A patent/KR100697677B1/en active IP Right Grant
- 2001-02-16 DK DK06002619.2T patent/DK1671695T4/en active
- 2001-02-16 JP JP2001559568A patent/JP4584522B2/en not_active Expired - Lifetime
- 2001-02-16 WO PCT/EP2001/001752 patent/WO2001060477A2/en active IP Right Grant
- 2001-02-16 CA CA002400773A patent/CA2400773C/en not_active Expired - Lifetime
- 2001-02-16 MX MXPA02008024A patent/MXPA02008024A/en active IP Right Grant
- 2001-02-16 US US10/204,181 patent/US20030155294A1/en not_active Abandoned
- 2001-02-16 CN CNB018051685A patent/CN1238096C/en not_active Expired - Lifetime
- 2001-02-16 PT PT01909766T patent/PT1257333E/en unknown
- 2001-02-16 ES ES01909766T patent/ES2261380T3/en not_active Expired - Lifetime
- 2001-02-16 EP EP06002619.2A patent/EP1671695B2/en not_active Expired - Lifetime
- 2001-02-16 DE DE50109954T patent/DE50109954D1/en not_active Expired - Lifetime
- 2001-02-16 DK DK01909766T patent/DK1257333T3/en active
- 2001-02-16 BR BRPI0108451A patent/BRPI0108451B1/en active IP Right Grant
- 2001-02-16 EP EP01909766A patent/EP1257333B1/en not_active Expired - Lifetime
- 2001-02-16 CN CNB2005101286492A patent/CN100531871C/en not_active Expired - Lifetime
- 2001-02-16 ES ES06002619T patent/ES2447019T5/en not_active Expired - Lifetime
- 2001-02-16 AU AU37393/01A patent/AU776506B2/en not_active Expired
- 2001-02-16 AT AT01909766T patent/ATE327808T1/en active
- 2001-02-16 PT PT60026192T patent/PT1671695E/en unknown
-
2010
- 2010-03-16 US US12/725,098 patent/US8202428B2/en not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4336138A (en) * | 1975-07-26 | 1982-06-22 | Toyobo Co., Ltd. | Permeation separation apparatus |
US4293418A (en) * | 1979-03-28 | 1981-10-06 | Toray Industries, Inc. | Fluid separation apparatus |
US4352736A (en) * | 1980-12-08 | 1982-10-05 | Toyo Boseki Kabushiki Kaisha | Wound flattened hollow fiber assembly having plural spaced core sections |
US5470659A (en) * | 1983-01-17 | 1995-11-28 | Akzo Nv | Hollow fibers |
US4906375A (en) * | 1984-07-14 | 1990-03-06 | Fresenius, Ag | Asymmetrical microporous hollow fiber for hemodialysis |
US5489382A (en) * | 1987-10-29 | 1996-02-06 | Terumo Kabushiki Kaisha | Oxygenator using porous hollow fiber membrane |
US5779897A (en) * | 1996-11-08 | 1998-07-14 | Permea, Inc. | Hollow fiber membrane device with inert filaments randomly distributed in the inter-fiber voids |
US6074559A (en) * | 1996-11-21 | 2000-06-13 | Fresenius Medical Care Deutschland Gmbh | Filter device having a hollow fiber bundle and associated sealing devices |
US6322703B1 (en) * | 1999-04-20 | 2001-11-27 | Asahi Kasei Kabushiki Kaisha | Method for purifying aqueous suspension |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080237127A1 (en) * | 2004-08-06 | 2008-10-02 | Asahi Kasei Medical Co. Ltd. | Polysulfone Hemodialyzer |
US8828225B2 (en) * | 2004-08-06 | 2014-09-09 | Asahi Kasei Medical Co., Ltd. | Polysulfone hemodialyzer |
US20100000936A1 (en) * | 2007-01-30 | 2010-01-07 | Toray Industries, Inc | Hollow-fiber membrane and hollow-fiber membrane module having the same included therein |
US20100270232A1 (en) * | 2007-12-27 | 2010-10-28 | Toray Industries, Inc. | Fiber construct for treating biological components |
US20110120932A1 (en) * | 2008-08-22 | 2011-05-26 | Gambro Lundia Ab | Diffusion and/or filtration device |
US8387804B2 (en) | 2008-08-22 | 2013-03-05 | Gambro Lundia Ab | Diffusion and/or filtration device |
US8771516B2 (en) | 2009-05-20 | 2014-07-08 | Gambro Lundia Ab | Membranes having improved performance |
US8827087B2 (en) | 2009-05-20 | 2014-09-09 | Gambro Lundia Ab | Membranes having improved performance |
WO2014119976A1 (en) * | 2013-02-04 | 2014-08-07 | 코오롱인더스트리 주식회사 | Hollow fibre membrane and hollow fibre membrane module including same |
US11541355B2 (en) | 2016-10-24 | 2023-01-03 | Fresenius Medical Care Deutschland Gmbh | Method for determining a permeation property of hollow fibre membrane bundles |
US11628407B2 (en) * | 2017-03-17 | 2023-04-18 | Fresenius Medical Care Deutschland Gmbh | Hollow fiber membrane having improved diffusion properties |
EP4063004A4 (en) * | 2019-11-20 | 2023-11-15 | Nipro Corporation | Hollow fiber membrane module |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20030155294A1 (en) | Filter device, preferably a hollow fibre dialyser, comprising curled hollow fibres | |
EP0464737B1 (en) | A bundle of permselective hollow fibers and a fluid separator containing the same | |
ES2535013T3 (en) | Central core element for a separator assembly | |
US3743098A (en) | Spiral mass transfer device with low flow resistance and fluid volume | |
CA2739238C (en) | Spirally wound membrane separator assembly | |
CA1051789A (en) | Membrane diffusion device having ribbed membrane support | |
JPH0229373B2 (en) | ||
US4707261A (en) | Tubular membrane ultrafiltration module | |
AU2017227995B2 (en) | Hollow fibre membrane having three dimensional texturing | |
WO1981002683A1 (en) | Tubular channel diffusion device having flow guides therein | |
JP2009095825A (en) | Hollow fiber membrane or hollow fiber membrane module, and its manufacturing method | |
JPS61266609A (en) | Modified cross-section hollow fiber, modified cross-section hollow fiber bundle and fluid separator | |
JPS6391103A (en) | Pressure supporting pipe for tubular semipermeable membrane |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HEILMANN, KLAUS;FRITZSCHE, STEFFEN;REEL/FRAME:013715/0714;SIGNING DATES FROM 20020826 TO 20020905 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |