Fluid collection canister with integrated moisture trap

Patent metadata

Field	Value
Publication number	US-9669139-B2
Application number	US-201414186808-A
Country	US
Kind code	B2
Filing date	Feb 21, 2014
Priority date	Mar 14, 2013
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A moisture trap for removing liquid from fluid from a tissue site treated with reduced pressure are described. The moisture trap may include a barrier adapted to be fluidly coupled to and define an indirect fluid path between a fluid reservoir and a reduced-pressure source. The barrier may have a hydrophilic surface. The moisture trap also may include a sump adapted to receive condensation from the barrier.

First claim

We claim:

1. A system for treating a tissue site with reduced pressure, the system comprising:
a dressing adapted to be placed adjacent to the tissue site;
a reduced-pressure source adapted to be fluidly coupled to the tissue site;
a canister having a fluid reservoir adapted to be fluidly coupled to the dressing and the reduced-pressure source; and
a moisture trap disposed in the canister and fluidly separating a portion of the fluid reservoir, the moisture trap comprising a barrier and a sump adapted to receive condensation from the barrier, the barrier having a hydrophilic surface and defining an indirect fluid path between the fluid reservoir and the reduced-pressure source.

2. The system of claim 1 , wherein:
the barrier comprises plates in parallel juxtaposition and separated to define the indirect fluid path.

3. The system of claim 1 , wherein:
the barrier comprises plates in parallel juxtaposition and positioned to define the indirect fluid path; and
each of the plates is disposed in a plane that intersects with the sump.

4. The system of claim 1 , wherein:
the barrier comprises solid plates in parallel juxtaposition and positioned to define the indirect fluid path; and
each of the solid plates is disposed in a plane that intersects the sump.

5. The system of claim 1 , wherein:
the barrier comprises a plate configured to direct fluid in opposing directions on opposing sides of the plate.

6. The system of claim 1 , wherein the hydrophilic surface comprises one or more protrusions.

7. The system of claim 1 , wherein the hydrophilic surface comprises one or more protrusions in the range of about 15 micrometers to about 20 micrometers.

8. The system of claim 1 , wherein the barrier further comprises a channel adapted to direct condensation to the sump.

9. The system of claim 1 , wherein the barrier further comprises a hydrophobic channel adapted to direct condensation to the sump.

10. The system of claim 1 , wherein the barrier further comprises a hydrophobic channel adapted to direct condensation to the sump, and the hydrophilic surface comprises protrusions adapted to direct condensation to the hydrophobic channel.

11. The system of claim 1 , wherein the barrier comprises a spiral barrier having lateral edges coupled to the moisture trap, a first end disposed proximate to the fluid reservoir, and a second end disposed proximate to the reduced-pressure source.

12. The system of claim 1 , wherein the barrier comprises cells having interconnected cell walls, the cell walls having perforations defining the indirect fluid path.

13. The system of claim 1 , wherein the barrier comprises cells having interconnected cell walls, each cell having a hexagonal shape, and the cell walls having perforations defining the indirect fluid path.

14. The system of claim 1 , wherein the barrier comprises cells having interconnected cell walls, each cell having a hexagonal shape having a distance across a flat of about 6 mm, and the cell walls having perforations defining the indirect fluid path.

15. The system of claim 1 , wherein the barrier comprises a mesh having an upper layer, a lower layer, and fibers coupled between the upper layer and the lower layer, the indirect fluid path defined by spaces between the fibers.

16. The system of claim 1 , wherein the sump comprises an absorbent.

17. The system of claim 1 , wherein the moisture trap is disposed within the fluid reservoir of the canister and adjacent to a fluid outlet of the canister so that fluid flowing through the canister passes through the moisture trap.

18. The system of claim 1 , wherein the barrier comprises a hydrophilic material having a hydrophobic material disposed thereon to form a liquid channel.

19. The system of claim 1 , wherein the barrier comprises a hydrophobic material having a hydrophilic material coated thereon, areas of the hydrophobic material that are uncoated forming a liquid channel.

20. The system of claim 1 , wherein the barrier comprises a hydrophilic portion and a hydrophobic portion, the hydrophobic portion forming a liquid channel, and the hydrophilic portion comprising greater than or equal to about 80% of the barrier.

21. The system of claim 1 , wherein the moisture trap further comprises a fluid inlet having a hydrophobic filter disposed thereon so that fluid flowing through the fluid inlet passes through the hydrophobic filter.

22. The system of claim 1 , wherein the moisture trap further comprises a fluid outlet having a hydrophobic filter disposed thereon so that fluid flowing through the fluid outlet passes through the hydrophobic filter.

23. The system of claim 1 , wherein the moisture trap further comprises:
a fluid inlet having a hydrophobic filter disposed thereon so that fluid flowing through the fluid inlet passes through the hydrophobic filter; and
a fluid outlet having a hydrophobic filter disposed thereon so that fluid flowing through the fluid outlet passes through the hydrophobic filter.

24. A moisture trap for removing liquid from fluid in a reduced pressure treatment system, the moisture trap comprising:
a fluid inlet configured to be fluidly coupled to a reduced-pressure inlet of a canister;
a fluid outlet configured to be fluidly coupled to a reduced-pressure source;
a barrier disposed between the fluid inlet and the fluid outlet to provide an indirect fluid path between the fluid reservoir and the reduced-pressure source, the barrier having a hydrophilic surface; and
a sump adapted to receive condensation from the barrier;
wherein the moisture trap forms a separately enclosed space within the canister.

25. The moisture trap of claim 24 , wherein the barrier comprises plates in parallel juxtaposition and positioned to define the indirect fluid path.

26. The moisture trap of claim 24 , wherein:
the barrier comprises plates in parallel juxtaposition and positioned to provide the indirect fluid path; and
each of the plates is disposed in a plane that intersects the sump.

27. The moisture trap of claim 24 , wherein:
the barrier comprises solid plates in parallel juxtaposition and positioned to provide the indirect fluid path; and
each of the solid plates is disposed in a plane that intersects the sump.

28. The moisture trap of claim 24 , wherein the barrier comprises plates in parallel juxtaposition and configured to direct fluid in opposing directions on opposing sides of each plate.

29. The moisture trap of claim 24 , wherein the hydrophilic surface comprises one or more protrusions.

30. The moisture trap of claim 24 , wherein the hydrophilic surface comprises one or more protrusions in the range of about 15 micrometers to about 20 micrometers.

31. The moisture trap of claim 24 , wherein the barrier further comprises a channel adapted to direct condensation to the sump.

32. The moisture trap of claim 24 , wherein the barrier further comprises a hydrophobic channel adapted to direct condensation to the sump.

33. The moisture trap of claim 24 , wherein the barrier further comprises a hydrophobic channel adapted to direct condensation to the sump, and the hydrophilic surface comprises protrusions adapted to direct condensation to the hydrophobic channel.

34. The moisture trap of claim 24 , wherein the barrier compri

Assignees

• Kci Licensing Inc

Inventors

• Coulthard Richard Daniel John
• Locke Christopher Brian

Classifications

• B01D5/0006

  Coils or serpentines · CPC title

• B01D5/0054

  General arrangements, e.g. flow sheets · CPC title

• B01D45/08

  by impingement against baffle separators · CPC title

• A61M2205/7527

  liquophilic, hydrophilic · CPC title

• A61M2207/00

  Methods of manufacture, assembly or production · CPC title