WOUND DRESSING AND METHOD OF TREATMENT

• US 20150190286A1
• Filed: 07/31/2013
• Published: 07/09/2015
• Est. Priority Date: 08/01/2012
• Status: Active Grant

• Current Assignee: Smith & Nephew PLC
• Original Assignee: Smith & Nephew PLC
• Inventors: Allen, Julie, Askem, Ben Alan, Collinson, Sarah Jenny, Mehta, Steven Carl, Gowans, Philip, Nicolini, Derek, Russell, Mark, Zagrabski, Carol
• Granted Patent: US 10,667,955 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61F 13/00059 provided with visual effects, e.g. printed or colored
• CPC Class Codes: A61F 13/01012 being made of natural material, e.g. cellulose-, protein-, collagen-based
• CPC Class Codes: A61F 13/01017 synthetic, e.g. polymer based
• CPC Class Codes: A61F 13/01042 Absorbency
• CPC Class Codes: A61F 13/0206 with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
• CPC Class Codes: A61F 13/0209 comprising superabsorbent material
• CPC Class Codes: A61F 13/022 having more than one layer with different fluid retention characteristics
• CPC Class Codes: A61F 13/0223 characterized by parametric properties of the fluid retention layer, e.g. absorbency, wicking capacity, liquid distribution
• CPC Class Codes: A61F 13/0266 especially adapted for wound covering/occlusive dressings
• 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: A61F 2013/00153 coloured or with decoration pattern or printing
• CPC Class Codes: A61F 2013/00182 with transparent part
• CPC Class Codes: A61F 2013/00289 easy removing of the protection sheet
• CPC Class Codes: A61M 1/90 Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/962 having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
• CPC Class Codes: A61M 1/982 with means for detecting level of collected exudate
• CPC Class Codes: A61M 1/985 the dressing itself forming the collection container

Abstract

Embodiments disclosed herein are directed to negative pressure treatment systems and wound dressing systems, apparatuses, and methods that may be used for the treatment of wounds. In particular, some embodiments are directed to improved wound dressings comprising an obscuring layer that may hide fluid contained therein. Some embodiments may further comprise one or more viewing windows disposed therethrough so as to enable monitoring or examination of fluids contained therein.

Claims

1. A wound dressing comprising:

an acquisition distribution layer;

an absorbent layer over the acquisition distribution layer;

a backing layer above the absorbent layer; and

a fluidic connector configured to connect the backing layer to a source of negative pressure;

wherein the acquisition distribution layer is configured to horizontally wick fluid as the fluid is absorbed upward through the wound dressing.

3. The wound dressing of claim 1, wherein the fluidic connector is positioned over an opening in the backing layer.

5. The wound dressing of claim 1, wherein the acquisition distribution layer comprises a mix of cellulosic fibers and composite fibers, the composite fibers comprising a PET core and a PE outer layer.

6. The wound dressing of claim 1, wherein the acquisition distribution layer comprises a plurality of fibers, and a majority of the fiber volume extends horizontally, or substantially or generally horizontally.

7. The wound dressing of claim 1, wherein the acquisition distribution layer comprises a plurality of fibers, and approximately 80% to approximately 90% of the fiber volume extends horizontally, or substantially or generally horizontally.

8. The wound dressing of claim 1, wherein the acquisition distribution layer comprises a plurality of fibers, and all or substantially all of the fiber volume extends horizontally, or substantially or generally horizontally extending fibers.

9. The wound dressing of claim 1, wherein the acquisition distribution layer comprises a plurality of fibers, and a majority of the fibers span a distance perpendicular to the thickness of the acquisition distribution layer that is greater than the thickness of the acquisition distribution layer.

10. The wound dressing of claim 1, configured such that a ratio of an amount of fluid wicking laterally across the acquisition distribution layer to an amount of fluid wicking vertically through the acquisition distribution layer when under negative pressure is about 2:

1 or more.

12. The wound dressing of claim 1, wherein the absorbent layer comprises a fibrous network and superabsorbing particles within the fibrous network.

13. The wound dressing of claim 1, further comprising a wound contact layer below the acquisition distribution layer.

14. The wound dressing of claim 13, further comprising a transmission layer between the wound contact layer and the acquisition distribution layer.

15. The wound dressing of claim 14, wherein the transmission layer is configured to vertically wick fluid.

16. The wound dressing of claim 14, wherein the transmission layer comprises a top fabric layer, a bottom fabric layer, and a plurality of filaments extending generally perpendicularly between said top fabric layer and said bottom fabric layer.

17. The wound dressing of claim 16, wherein a majority of filaments, by volume, extend vertically, or substantially or generally vertically.

18. The wound dressing of claim 16, wherein approximately 80% to approximately 90% of the filaments, by volume, extend vertically, or substantially or generally vertically.

19. The wound dressing of claim 16, wherein all or substantially all of the filaments, by volume, extend vertically, or substantially or generally vertically.

20. The wound dressing of claim 16, wherein a majority of filaments extend upward from the bottom fabric layer and/or downward from the top fabric layer and extend over a length more than half the distance between the top and bottom fabric layers.

21. The wound dressing of claim 16, wherein a majority of filaments span a distance that is greater in a direction perpendicular to the top and bottom fabric layers than in a direction parallel to the top and bottom fabric layers.

22. The wound dressing of claim 14, configured such that a ratio of an amount of fluid wicking vertically through the transmission layer to an amount of fluid wicking laterally across the transmission layer when under negative pressure is about 2:

1 or more.

23. The wound dressing of claim 1, wherein the acquisition distribution layer comprises viscose, polyester, polypropylene, cellulose, polyethylene or a combination of some or all of these materials.

2. (canceled)

4. (canceled)

11. (canceled)

24-50. -50. (canceled)