Connection assembly with perforated film layer for absorbent negative pressure dressing

1. An assembly for coupling a dressing to a tube connected to a pump, the assembly comprising:

a hydrophobic film layer comprising a perforation extending therethrough;

an indicator coupled to a first side of the hydrophobic film layer and positioned proximate the perforation;

a felted foam layer coupled to a second side of the hydrophobic film layer and fluidly communicable with the indicator via the perforation; and

a connection pad coupled to the first side of the hydrophobic film layer and coupleable to the tube.

2. The assembly of claim 1 , wherein the felted foam layer is fluidly communicable with the connection pad via the perforation.

3. The assembly of claim 1 , wherein the indicator is configured to change colors in response to contacting fluid.

4. The assembly of claim 3 , wherein the indicator comprises a hydrochromic layer comprising a hole extending therethrough, the hole aligned with the perforation.

5. The assembly of claim 3 , comprising an adhesive layer configured to couple the indicator to the hydrophobic film layer, and wherein:

the adhesive layer comprises a channel extending from the perforation to an edge of the indicator; and

the channel is configured to direct fluid from the perforation to the edge of the indicator.

6. The assembly of claim 1 , wherein the hydrophobic film layer is configured to allow the flow of air therethrough from the felted foam layer to the connection pad.

7. A wound therapy system, comprising:

a wound contact layer configured to contact a wound;

a manifolding layer coupled to a non-wound-facing side of the wound contact layer;

a drape coupled to the manifolding layer and sealable over the wound, the drape having a hole extending therethrough;

a felted foam layer positioned at the hole and fluidly communicable with the manifolding layer;

a hydrophobic film layer coupled to the felted foam layer and configured to allow air to flow therethrough and substantially prevent liquid from flowing therethrough, the hydrophobic film layer having a perforation extending therethrough, the perforation configured to allow liquid to pass through the hydrophobic film layer;

a fluid-activated indicator coupled to the hydrophobic film layer proximate the perforation, the hydrophobic film layer positioned between the fluid-activated indicator and the felted foam layer;

a connection pad coupled to the drape and sealed over the hole, the felted foam layer, the hydrophobic film layer, and the indicator;

a tube coupled to the connection pad; and

a pump coupled to the tube, the pump operable to draw a negative pressure at the wound by removing air from the manifolding layer via the felted foam layer, the hydrophobic film layer, the connection pad, and the tube.

8. The wound therapy system of claim 7 , wherein the felted foam layer is fluidly communicable with the connection pad via the perforation.

9. The wound therapy system of claim 7 , wherein the fluid-activated indicator is configured to change colors in response to contacting fluid.

10. The wound therapy system of claim 9 , wherein the fluid-activated indicator comprises a hydrochromic layer comprising a hole extending therethrough, the hole aligned with the perforation.

11. The wound therapy system of claim 9 , comprising an adhesive layer configured to couple the indicator to the hydrophobic film layer, and wherein:

the adhesive layer comprises a channel extending from the perforation to an edge of the indicator; and

the channel is configured to direct fluid from the perforation to the edge of the indicator.

12. The wound therapy system of claim 7 , wherein the connection pad is transparent or translucent such that the indicator is visible through the connection pad.

13. A method for manufacturing a wound therapy system, comprising:

coupling an indicator to a hydrophobic film layer;

creating a perforation through the indicator and the hydrophobic film layer;

coupling the hydrophobic film layer to a felted foam layer, the hydrophobic film layer positioned between the indicator and the felted foam layer; and

coupling a connection pad to the hydrophobic film layer, the connection pad in fluid communication with the felted foam layer via the perforation.

14. The method of claim 13 , comprising coupling the connection pad to a tube.

15. The method of claim 13 , comprising:

forming a hole through a drape;

coupling the connection pad to the drape at the hole;

coupling a manifolding layer to the drape, the manifolding layer fluidly communicable with the felted foam layer via the hole; and

coupling a wound contact layer to the manifolding layer.

16. The method of claim 15 , comprising:

coupling the connection pad to a tube; and

coupling the tube to a pump, the pump configured to draw a negative pressure at the manifolding layer.

17. The method of claim 13 , wherein the indicator comprises a hydrochromic layer configured to change color when the hydrochromic layer contacts fluid.

18. The method of claim 13 , wherein coupling the indicator to a hydrophobic film layer comprises providing an adhesive layer between the indicator and the hydrophobic film layer.

19. The method of claim 18 , comprising providing the indicator with a channel extending from the perforation to an edge of the indicator.

20. The method of claim 13 , comprising creating a plurality of additional perforations through the hydrophobic film layer.