Flat-hose assembly for wound drainage system

• US 20080271804A1
• Filed: 03/20/2007
• Published: 11/06/2008
• Est. Priority Date: 03/20/2007
• Status: Active Grant

• Current Assignee: Convatec Limited (ConvaTec Group Plc)
• Original Assignee: Neogen Technologies, Inc.
• Inventors: Biggie, Lydia B., Dawson, John A.
• Granted Patent: US 8,083,712 B2
• Time in Patent Office: Days
• US Class Current: 138/137
• CPC Class Codes: A61M 1/913 having a bridging element for transferring the reduced pressure from the connector to the dressing
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/966 having a pressure sensor on or near the dressing
• CPC Class Codes: A61M 1/98 Containers specifically adapted for negative pressure wound therapy
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
• CPC Class Codes: F16L 11/121 specially profiled cross sections

Abstract

A flat-hose assembly has a proximal end and a distal end adapted for use with a negative pressure wound drainage system. The flat-hose assembly comprises a top layer, a bottom layer, and a filter layer. The bottom layer forms an opening at the distal end of the flat-hose assembly to allow exudates of a wound to flow into the flat-hose assembly. The filter layer is disposed between the top layer and the bottom layer. The top and bottom layer form a seal area along a periphery of the top layer and the bottom layer to seal the filter layer therebetween.

Claims

1. A flat-hose assembly having a proximal end and a distal end adapted for use with a negative pressure wound drainage system, the flat-hose assembly comprising:

a top layer;

a bottom layer forming an opening at the distal end of the flat-hose assembly allowing exudates of a wound to flow into the flat-hose assembly; and

a filter layer disposed between the top layer and the bottom layer;

wherein the top and bottom layer form a seal area along a periphery of the top layer and the bottom layer sealing the filter layer therebetween.

2. The flat-hose assembly of claim 1 further comprising:

a first hose fitting protruding through a first opening formed in the proximal end of the top layer; and

a second hose fitting protruding through a second opening formed in the proximal end of the top layer.

3. The flat-hose assembly of claim 1 further comprising:

an adhesive applied about the opening of the bottom layer, the adhesive adapted to connect the flat-hose assembly to a wound dressing of the wound drainage system.

4. The flat-hose assembly of claim 3 further comprising:

a protective backing covering the adhesive preventing unintentional exposure of the adhesive, the protective backing being removable to expose the adhesive prior to use of the flat-hose assembly with the negative pressure wound drainage system.

5. The flat-hose assembly of claim 3, wherein the adhesive forms an airtight connection between the flat-hose assembly and the wound dressing.

6. The flat-hose assembly of claim 1, wherein the top layer and the bottom layer are a polymeric material.

7. The flat-hose assembly of claim 1, wherein the top layer and the bottom layer are generally transparent.

8. The flat-hose assembly of claim 1, wherein the top layer and the bottom layer are generally translucent.

9. The flat-hose assembly of claim 1, wherein the top layer and the bottom layer are a flexible polymeric material.

10. The flat-hose assembly of claim 1, wherein the seal between the top layer and the bottom layer is an RF weld seal, an adhesive seal, or a heat seal.

11. The flat-hose assembly of claim 1, wherein the filter layer traps particles of exudates draining from a wound within the flat-hose assembly.

12. The flat-hose assembly of claim 1, wherein the filter layer comprises a porous material selected from the group consisting of cotton, polymeric fibers, and filter screen material.

13. The flat-hose assembly of claim 1, wherein the filter layer spaces the top layer from the bottom layer, preventing the top layer from generally contacting the bottom layer beyond the seal area and thereby blocking the flow of exudates.

14. The flat-hose assembly of claim 1, wherein the distal end has a larger surface area than the proximal end.

15. A closed wound drainage system comprising:

a wound dressing adapted to be positioned over a wound area of a patient, the wound dressing forming a first opening over the wound area;

a flat-hose assembly having a top layer, a bottom layer, a filter layer, a first hose fitting, and a second hose fitting, the filter layer being positioned between the top layer and the bottom layer, the bottom layer forming a second opening adapted to align with the first opening of the wound dressing;

a collection bag in communication with the flat-hose assembly, the collection bag adapted to collect material from the wound drawn through the flat-hose assembly; and

a vacuum pump to apply negative pressure to the wound, the vacuum pump in communication with the collection bag and the flat-hose assembly.

16. The closed wound drainage system of claim 15, wherein the wound dressing comprises a layer of gel sized to extend beyond the wound area for attachment to healthy skin outside of the wound area, the wound dressing adhering to skin around the wound outside of the wound area.

17. The closed wound drainage system of claim 15 further comprising:

a first hose connecting the flat-hose assembly to the collection bag, the first hose applying negative pressure to the flat-hose assembly via a first hose fitting;

a second hose connecting the collection bag to the vacuum pump, the second hose applying negative pressure to the collection bag; and

a third hose connection the vacuum pump to the flat-hose assembly via a second hose fitting, the third hose modulating the negative pressure applied by the first hose to the flat-hose assembly.

18. The closed wound drainage system of claim 17, wherein an airtight seal forms between the wound dressing and the flat-hose assembly.

19. The closed wound drainage system of claim 15, wherein the flat-hose assembly filter layer traps particles of material drawn from the wound to retain the particles within the flat-hose assembly.

20. The closed wound drainage system of claim 17, wherein the flat-hose assembly top layer and bottom layer are generally transparent to allow monitoring of the material from the wound.

21. A flat-hose assembly adapted for use with a negative pressure wound drainage system, the flat-hose assembly having a proximal end and a distal end and comprising:

a top layer forming a first opening and a second opening therethrough at the proximal end of the top layer, the openings being adapted to apply negative pressure to the flat-hose assembly;

a bottom layer forming a third opening at the distal end of the bottom layer, the third opening allowing exudates of a wound to flow into the flat-hose assembly;

a filter layer disposed between the top layer and the bottom layer, the filter layer being adapted to prevent contact between the top layer and the bottom layer other than at a periphery of the top layer and the bottom layer, the filter layer further adapted to trap large particles of exudates from a wound within the flat-hose assembly, the top layer and the bottom layer forming a seal area along a periphery of the top layer and the bottom layer sealing the filter layer therebetween;

a first hose fitting protruding through a first opening formed in the distal end of the top layer adapted to connect the flat-hose assembly to the negative pressure wound drainage system;

a second hose fitting protruding through a second opening formed in the distal end of the top layer adapted to connect the flat-hose assembly to the negative pressure wound drainage system; and

an adhesive adapted to connect the flat-hose assembly to a wound dressing of the wound drainage system.

22. The flat-hose assembly of claim 21, further comprising a protective backing covering the adhesive preventing unintentional exposure of the adhesive, the protective backing being removable to expose the adhesive prior to use of the flat-hose assembly with the negative pressure wound drainage system.

23. The flat-hose assembly of claim 21, wherein the seal between the top layer and the bottom layer is a RF weld seal.

24. The flat-hose assembly of claim 21, wherein the top layer and the bottom layer are generally transparent.