Integrated device for liver support system

Patent metadata

Field	Value
Publication number	US-10086123-B2
Application number	US-201314646833-A
Country	US
Kind code	B2
Filing date	Nov 5, 2013
Priority date	Nov 26, 2012
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

An extracorporeal system for liver dialysis comprises a filter device having hollow fibers with integrated ion-exchange particles and hydrophobic adsorbent particles in the filtrate space. The system can be used for the treatment of acute liver failure and acute-on-chronic liver failure.

First claim

The invention claimed is:

1. An integrated filter module for the treatment of fluids, comprising
(a) a cylindrical filter housing;
(b) a bundle of essentially parallel hollow fiber membranes distributed longitudinally within the cylindrical filter housing;
(c) a filtrate space, which is closed off from a lumen space of the hollow fiber membranes and which is in fluid communication with an inlet means and optionally an outlet means;
(d) the inlet means for feeding fluid into one of the filtrate space and the lumen space of the hollow fiber membranes;
(e) the outlet means for removing the fluid from the lumen space of the hollow fiber membranes, and optionally a second outlet means for removing treated fluid from the filtrate space;
wherein the hollow fiber membranes are prepared from at least one hydrophobic polymer selected from the group consisting of polysulfones, polyethersulfones, polyaryethersulfones, polyamides and polyacrylonitriles and at least one hydrophilic polymer and have incorporated therein at least one of 5-40 wt.-% of ion exchange particles and 5-40 wt.-% of hydrophobic particles, and
wherein the filtrate space is populated with at least one of hydrophobic particles and ion exchange particles at a filling ratio of between 0.6 and 1.0, wherein the filling ratio is the volume in ml of the maximal amount of particulate material which can be accommodated in the filtrate space of a given hollow fiber membrane module (V PM ) and the utilizable volume in ml of the filtrate space of said module (V FS ):

Filling
⁢

⁢
ratio

=

V
PM

⁡

(
ml
)

V
FS

⁡

(
ml
)

wherein V PM mresents the volume of the particulate material which can be accommodated in the filtrate space of the module, and V FS represents the utilizable filtrate space, and wherein V PM is calculated from

V
PM

⁡

(
ml
)

=

m
PM

⁡

(
g
)

ρ
⁡

(

g
⁢

/

⁢
ml

)

wherein m PM represents the amount of particulate material which can be accommodated in the filtrate space of the module and p represents the tapping density of the particulate material according to DIN ISO 3953.

2. A module according to claim 1 , wherein the hydrophobic particles of the filtrate space are selected from the group consisting of carbonaceous adsorbents, polymer adsorbents, hydrophobic silica and mixtures thereof.

3. A module according to claim 1 wherein the ion exchange particles of the hollow fiber membranes are one of cation exchange particles and anion exchange particles.

4. A module according to claim 1 wherein the hollow fiber membrane comprises 5-40 wt.-% of ion exchange particles and that the filtrate space is populated with hydrophobic particles.

5. A module according to claim 1 wherein the cylindrical filter housing has an allocation of the hollow fiber membranes between 15% to 70%.

6. A module according to claim 1 wherein the particles in the filtrate space have an average diameter of between 1 μm to 400 μm.

7. A module according to claim 1 wherein the hollow fiber membrane is one of a microporous membrane and a protein separation membrane.

8. A module according to claim 1 wherein the hollow fiber membrane is a plasma separation membrane.

9. A module according to claim 1 wherein the fluid enters the module at inlet means which is in fluid communication with the filtrate space.

10. A module according to claim 1 wherein the fluid enters the module at inlet means which is in fluid communication with a lumen side of the hollow fiber membranes.

11. A module according to claim 1 wherein the fluid is removed from the module through outlet means.

12. A module according to claim 1 , wherein the hydrophobic particles of the hollow fiber membranes are selected from the group consisting of carbonaceous adsorbents, polymer adsorbents, hydrophobic silica and mixtures thereof.

13. A module according to claim 1 , wherein the hollow fiber membranes have incorporated therein 25-40 wt.-% of ion exchange particles.

14. A module according to claim 1 , wherein the filtrate space is homogenously populated with at least one of hydrophobic particles and ion exchange particles.

15. A module according to claim 1 , wherein the filtrate space is homogenously populated with hydrophobic particles.

16. A module according to claim 1 , wherein the filtrate space is homogenously populated with ion exchange particles.

17. A module according to claim 1 , wherein the filtrate space is populated with hydrophobic particles.

18. A module according to claim 1 , wherein the filtrate space is populated with ion exchange particles.

Assignees

• Gambro Lundia Ab

Inventors

• Welzel Arne
• Storr Markus
• Krause Bernd
• Goehl Hermann
• Flieg Ralf

Classifications

• D01D5/24

  with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08) · CPC title

• B01D15/325

  Reversed phase · CPC title

• B01D2311/2626

  Absorption or adsorption · CPC title

• A61M1/1633 Primary

  with more than one dialyser unit · CPC title

• B01D61/243

  Dialysis · CPC title