Apparatus for vacuum bridging and/or exudate collection

• US 10,406,036 B2
• Filed: 12/27/2017
• Issued: 09/10/2019
• Est. Priority Date: 06/18/2009
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Braga, Richard M., Fink, E. David, Heagle, David G., Vitaris, Ronald F.
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): Sass, Sara A
• Application Number:
  US15/856,007
• Publication Number:
  US 20180133064A1
• Time in Patent Office: 622 Days
• CPC Class Codes: A61F 13/00 Bandages or dressings radioactive dressings A61N5/1029; Absorbent pads
• CPC Class Codes: A61F 13/05 specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• 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 1/916 specially adapted for deep wounds
• CPC Class Codes: A61M 1/985 the dressing itself forming the collection container
• CPC Class Codes: A61M 2205/584 having a color code

Abstract

An apparatus for promoting the healing of an exuding wound includes a cover layer for positioning over a wound to define a reservoir over the wound. An exudate conduit having a fibrous core includes a plurality of fibers communicates with the reservoir for wicking fluids away from the wound.

Claims

1. A negative pressure wound dressing apparatus comprising:

a wound dressing comprising a cover layer configured to define a reservoir over a wound in which a negative pressure can be maintained by forming a substantially fluid-tight seal around the wound, the cover layer comprising an aperture therein through which negative pressure can be applied to the reservoir;

an elongate conduit having a first end, a second end, and a lumen, the first end configured to form a substantially fluid tight seal over the aperture in the cover layer, the second end including an aperture therein through which negative pressure can be applied to the lumen, wherein the conduit comprises an upper surface and an opposite, wound facing lower surface, wherein a portion of the lower surface is configured to contact the cover layer, and wherein the elongate conduit has a generally flattened, planar profile;

a fibrous core disposed within the lumen of the conduit and extending along substantially the entire length of the conduit, wherein the fibrous core comprises a knitted nylon material defining an elongate sleeve having a length extending along the length of the fibrous core and wherein the fibrous core has a first end and a second end opposite from the first end, the first end configured to be in fluid communication with the reservoir through the aperture in the cover layer; and

a connection member coupled to the conduit and in fluid communication with the second end of the fibrous core through the aperture in the second end of the conduit, the connection member configured to be in fluid communication with a vacuum source and further comprising a check valve disposed within the connection member, and the connection member is configured to be directly or indirectly connected to the vacuum source without a collection canister configured to collect fluid.

2. The negative pressure wound dressing apparatus of claim 1, wherein the fibrous core comprises a bundle of fibers.

3. The negative pressure wound dressing apparatus of claim 1, wherein the fibrous core comprises at least one fiber having a round cross-section.

4. The negative pressure wound dressing apparatus of claim 1, wherein the fibrous core comprises a continuous fiber.

5. The negative pressure wound dressing apparatus of claim 1, wherein the fibrous core comprises at least one hydrophobic fiber.

6. The negative pressure wound dressing apparatus of claim 1, wherein the fibrous core comprises at least one hydrophilic fiber.

7. The negative pressure wound dressing apparatus of claim 1, wherein the knitted nylon material comprises nylon 6.

8. The negative pressure wound dressing apparatus of claim 1, wherein the conduit is moisture vapor permeable.

9. The negative pressure wound dressing apparatus of claim 1, wherein the conduit comprises a polymer.

10. The negative pressure wound dressing apparatus of claim 9, wherein the conduit comprises polyvinyl chloride.

11. The negative pressure wound dressing apparatus of claim 1, wherein the conduit is transparent.

12. The negative pressure wound dressing apparatus of claim 1, wherein the fibrous core is configured to provide patency to the conduit when negative pressure is applied to the conduit.

13. The negative pressure wound dressing apparatus of claim 1, wherein the fibrous core is configured to prevent kinking of the conduit.

14. The negative pressure wound dressing apparatus of claim 1, further comprising a filter configured to prevent contamination of the vacuum source.

15. The negative pressure wound dressing apparatus of claim 1, further comprising an adhesive coated thin film disposed between the elongate conduit and the cover layer and configured to attach the elongate conduit to the cover layer.

16. A negative pressure wound therapy dressing comprising a drainage tube, wherein the drainage tube comprises a tube knitted or braided from a fiber, and wherein a sheath surrounds the knitted or braided tube.

17. The negative pressure wound therapy dressing of claim 16, wherein the sheath is moisture vapor permeable.

18. The negative pressure wound therapy dressing of claim 16, wherein the tube is a knitted tube.

19. The negative pressure wound therapy dressing of claim 16, wherein the fiber is a polyester, polyamide, polyethylene, polypropylene or polybutylene terephthalate fiber.

20. The negative pressure wound therapy dressing of claim 16, wherein the sheath comprises one or more layers.

21. The negative pressure wound therapy dressing of claim 20, wherein the knitted or braided tube is sandwiched between two layers of the sheath.

22. The negative pressure wound therapy dressing of claim 16, wherein the sheath is a polyurethane sheath.

23. The negative pressure wound therapy dressing of claim 16, wherein one end of the drainage tube forms an integral tab by which the drainage tube can be attached to the dressing.

24. The negative pressure wound therapy dressing of claim 16, wherein one end of the drainage tube is adapted for connection to a source of negative pressure.