Sorbent pouch

1. A sorbent pouch, comprising:

a porous material forming in-part a sorbent pouch containing solid urease, the porous material allowing dissolved urease to pass through the sorbent pouch.

2. The sorbent pouch of claim 1 , wherein the porous material substantially retains undissolved urease in the sorbent pouch.

3. The sorbent pouch of claim 1 , wherein the porous material is selected from the group consisting of bolting cloth, porous polymer, porous metal, cotton, ashless filter paper, Dacron, and polyethylene terephthalate.

4. The sorbent pouch of claim 1 , wherein the sorbent pouch further contains one or more sorbent materials selected from a group consisting of activated carbon, hydrous zirconium oxide, ion-exchange resin, and combinations thereof.

5. The sorbent pouch of claim 4 , wherein the sorbent pouch further comprises at least one separator that separates the sorbent pouch into a top portion and a bottom portion; wherein the solid urease is contained in the top portion; and wherein the separator allows fluid to pass through the separator but prevents any of the sorbent materials from passing from the bottom portion to the top portion.

6. The sorbent pouch of claim 4 , wherein the urease and the one or more other sorbent materials are mixed together.

7. The sorbent pouch of claim 1 , wherein the sorbent pouch has a shape selected from the group consisting of a circular shape, a square shape, a triangular shape, a rectangular shape, and a disc shape.

8. The sorbent pouch of claim 1 , wherein the sorbent pouch is shaped to be adapted into an internal cavity defined by a sorbent cartridge in which the sorbent pouch is housed.

9. The sorbent pouch of claim 1 , wherein the sorbent pouch has a semi-rigid structure.

10. The sorbent pouch of claim 1 , wherein the sorbent pouch has a rigid structure.

11. The sorbent pouch of claim 1 , further comprising side portions constructed from a fluid impermeable material.

12. The sorbent pouch of claim 11 , further comprising an elastomeric material disposed on a side portion of the sorbent pouch.

13. The sorbent pouch of claim 1 , wherein the porous material is impregnated with an antimicrobial substance and/or an anticoagulant.

14. The sorbent pouch of claim 1 , wherein the sorbent pouch further comprises an o-ring seal member disposed on an outer periphery of the sorbent pouch.

15. The sorbent pouch of claim 1 , wherein the sorbent pouch can be opened and re-sealed.

16. The sorbent pouch of claim 15 , further comprising one or more engagement members on a top portion and a bottom portion of the sorbent pouch for sealing the sorbent pouch.

17. The sorbent pouch of claim 15 , further comprising a hinge connecting a top portion and bottom portion of the sorbent pouch for opening and resealing the sorbent pouch.

18. The sorbent pouch of claim 15 , further comprising an interior or exterior ring around a top portion or bottom portion of the sorbent pouch.

19. The sorbent pouch of claim 1 , the sorbent pouch comprising an extra layer of the porous material in a center of a bottom of the sorbent pouch.

20. The sorbent pouch of claim 1 , wherein a top portion and bottom portion of the sorbent pouch are sealed by any one of: heat sealing, adhesive, or woven fibers.

21. The sorbent pouch of claim 1 , the sorbent pouch containing a material consisting essentially of urease.