Ion exchange enhanced absorbent systems

Abstract

A system, method, and apparatus for treating a tissue site with reduced pressure includes a dressing adapted to be positioned proximate the tissue site. An absorbent may be adapted to be fluidly coupled to the manifold, and an ion exchange member may be adapted to be fluidly coupled between the manifold and the absorbent. A sealing member may be adapted to cover the tissue site to form a sealed space having the manifold disposed therein. A reduced-pressure source may be adapted to be fluidly coupled to the manifold.

1 .- 14 . (canceled) 
     
     
         15 . A method for treating a tissue site, the method comprising:
 disposing a manifold proximate the tissue site;   fluidly coupling an ion exchange member to the manifold;   fluidly coupling an absorbent to the ion exchange member and the manifold;   sealing the manifold to the tissue site with a sealing member;   fluidly coupling a reduced-pressure source to the manifold, the ion exchange member, and the manifold;   supplying reduced pressure to the tissue site to draw fluid from the tissue site to the absorbent through the ion exchange member; and   reducing an ionic concentration of the fluid with the ion exchange member.   
     
     
         16 . The method of  claim 15 , further comprising positioning the ion exchange member between the manifold and the sealing member. 
     
     
         17 . The method of  claim 15 , further comprising positioning the ion exchange member between the manifold and the sealing member and positioning the absorbent between the ion exchange member and the sealing member. 
     
     
         18 . The method of  claim 15 , further comprising positioning the ion exchange member between the manifold and the sealing member and positioning the absorbent in a container. 
     
     
         19 . The method of  claim 15 , wherein the method further comprises:
 fluidly coupling the manifold to the reduced-pressure source with a tube having at least one lumen;   disposing an absorbent in a portion of the lumen; and   positioning the ion exchange member between the manifold and the sealing member.   
     
     
         20 . The method of  claim 15 , wherein the method further comprises:
 fluidly coupling the manifold to the reduced-pressure source with a tube having at least one lumen; and   positioning the ion exchange member in the lumen.   
     
     
         21 . The method of  claim 15 , wherein the method further comprises:
 disposing the absorbent in a container;   fluidly coupling the container between the manifold and the reduced-pressure source with a tube having at least one lumen; and   positioning the ion exchange member in the tube.   
     
     
         22 . The method of  claim 15 , wherein the method further comprises:
 fluidly coupling the manifold to the reduced-pressure source with a tube having at least one lumen;   disposing the absorbent in a portion of the lumen; and   positioning the ion exchange member in another portion of the lumen between the manifold and the absorbent.   
     
     
         23 . A dressing for treating a tissue site, the dressing comprising:
 a manifold adapted to be positioned adjacent the tissue site for receiving reduced pressure;   an ion exchange layer adapted to be positioned adjacent the manifold and fluidly coupled to the manifold; and   an absorbent adapted to be positioned adjacent the ion exchange layer and fluidly coupled to the ion exchange layer and the manifold.   
     
     
         24 . The dressing of  claim 23 , wherein a surface area of the ion exchange layer adjacent the absorbent and a surface area of the absorbent adjacent the ion exchange layer are substantially the same. 
     
     
         25 . The dressing of  claim 23 , further comprising a sealing member adapted to be positioned over the ion exchange layer and the absorbent and further adapted to be fluidly sealed to an area adjacent the tissue site. 
     
     
         26 . The dressing of  claim 23 , wherein the ion exchange layer comprises porous beads formed from crosslinked polymers doped or grafted with acidic polymers. 
     
     
         27 . The dressing of  claim 23 , wherein:
 the ion exchange layer comprises porous beads formed from crosslinked polymers doped or grafted with acidic polymers;   the crosslinked polymers comprise polystyrene; and   the acidic polymers comprise poly (2-acrylamido-2-methyl-1-propanesulfonic acid) and poly (acrylamido-N-propyltrimethylammonium chloride).   
     
     
         28 . The dressing of  claim 23 , wherein the ion exchange layer comprises a zeolite. 
     
     
         29 . The dressing of  claim 23 , wherein the ion exchange layer comprises activated charcoal. 
     
     
         30 . The dressing of  claim 23 , wherein the ion exchange layer comprises Carbon 100% activated carbon. 
     
     
         31 . A container for storing fluids from a tissue site, the container comprising:
 a body having an interior portion, a fluid inlet, and a fluid outlet;   an absorbent disposed in the interior and adapted to absorb fluid from the tissue site; and   an ion exchange member coupled to the fluid inlet and fluidly coupled to the absorbent.   
     
     
         32 . The container of  claim 31 , wherein the ion exchange member comprises porous beads formed from crosslinked polymers doped or grafted with acidic polymers. 
     
     
         33 . The container of  claim 31 , wherein:
 the ion exchange member comprises porous beads formed from crosslinked polymers doped or grafted with acidic polymers;   the crosslinked polymers comprise polystyrene; and   the acidic polymers comprise poly (2-acrylamido-2-methyl-1-propanesulfonic acid) and poly (acrylamido-N-propyltrimethylammonium chloride).   
     
     
         34 . The container of  claim 31 , wherein the ion exchange member comprises a zeolite. 
     
     
         35 . The container of  claim 31 , wherein the ion exchange member comprises activated charcoal. 
     
     
         36 . The container of  claim 31 , wherein the ion exchange member comprises 100% activated carbon. 
     
     
         37 . A tube for transmitting fluid from a tissue site to a container, the tube comprising:
 a cylindrical body having at least one lumen; and   an ion exchange insert disposed within the lumen so that fluid transmitted through the lumen passes through the ion exchange insert.   
     
     
         38 . The tube of  claim 37 , wherein the cylindrical body is flexible. 
     
     
         39 . The tube of  claim 37 , wherein the ion exchange insert comprises porous beads formed from crosslinked polymers doped or grafted with acidic polymers. 
     
     
         40 . The tube of  claim 37 , wherein:
 the ion exchange insert comprises porous beads formed from crosslinked polymers doped or grafted with acidic polymers;   the crosslinked polymers comprise polystyrene; and   the acidic polymers comprise poly (2-acrylamido-2-methyl-1-propanesulfonic acid) and poly (acrylamido-N-propyltrimethylammonium chloride).   
     
     
         41 . The tube of  claim 37 , wherein the ion exchange insert comprises a zeolite. 
     
     
         42 . The tube of  claim 37 , wherein the ion exchange insert comprises activated charcoal. 
     
     
         43 . The tube of  claim 37 , wherein the ion exchange insert comprises 100% activated carbon. 
     
     
         44 . The tube of  claim 37 , wherein the lumen has a first portion and a second portion, the first portion of the lumen having the ion exchange insert disposed therein and the second portion of the lumen having an absorbent disposed therein.