Wound dressing port and associated wound dressing

• US 9,033,942 B2
• Filed: 03/07/2008
• Issued: 05/19/2015
• Est. Priority Date: 03/07/2008
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Vess, Mark A.
• Primary Examiner(s): SU, SUSAN SHAN
• Application Number:
  US12/044,051
• Publication Number:
  US 20090227968A1
• Time in Patent Office: 2,629 Days
• Field of Search: 604305-308
• US Class Current: 604/304
• CPC Class Codes: A61F 13/02 Adhesive bandages or dressings
• 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 13/0226 characterised by the support layer
• CPC Class Codes: A61F 13/025 having a special distribution arrangement of the adhesive
• 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 2013/0028 applying of mechanical pressure; passive massage
• CPC Class Codes: A61M 1/74 Suction control underwater drainage A61M1/61
• CPC Class Codes: A61M 1/86 Connectors between drainage tube and handpiece, e.g. drainage tubes detachable from handpiece
• 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 1/92 with liquid supply means
• CPC Class Codes: A61M 27/00 Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202

Abstract

A wound dressing for use in a vacuum wound therapy treatment includes a backing layer for positioning over a wound to define a reservoir in which a reduced pressure may be maintained over the wound. A portal member affixed to the backing layer provides a connection to a reduced pressure source through an opening in an ambient surface. A primary port extends between the opening and a primary aperture in a reservoir surface to providing fluid communication between the reservoir and the reduced pressure source. At least one supplemental port establishes fluid communication between the primary port and a supplemental aperture in the reservoir surface that is distinct and substantially spaced from the primary aperture.

Claims

1. A wound dressing for positioning over a wound, the wound dressing comprising:

a wound port configured to be affixed to a backing layer configured to form a substantially fluid tight seal around a perimeter of the wound to define a reservoir in which a reduced pressure may be maintained, such that an ambient surface of the wound port is positioned outside of the reservoir, the wound port comprising;

a primary port extending between an opening in the ambient surface of the wound port and a primary aperture in a reservoir surface of the wound port; and

a plurality of supplemental ports establishing fluid communication between the primary port and a plurality of supplemental apertures in the reservoir surface, the plurality of supplemental apertures surrounding the primary aperture, and arranged in a planar configuration about the primary aperture such that at least a first supplemental aperture of the plurality of supplemental apertures is not collinear with the primary aperture and a second supplemental aperture of the plurality of supplemental apertures.

2. The wound dressing according to claim 1, wherein the wound port is molded from flexible polymer.

3. The wound dressing according to claim 1, wherein the wound port further comprises an attachment flange adapted for connection to the backing layer.

4. The wound dressing according to claim 1, further comprising the backing layer, wherein the backing layer comprises a flexible polymeric membrane.

5. The wound dressing according to claim 4, wherein the backing layer comprises an adhesive coating around a periphery thereof, the adhesive coating adapted to affix the backing layer over the wound and to provide the substantially fluid tight seal around the perimeter of the wound.

6. The wound dressing according to claim 5, wherein the adhesive coating is interrupted such that an intermediate portion of the backing layer remains uncoated.

7. The wound dressing according to claim 1, wherein the opening is configured to be in fluid communication with a vacuum source and with the reservoir via the primary aperture.

8. The wound dressing according to claim 1, wherein the supplemental apertures are distinct and substantially spaced from the primary aperture.

9. The wound dressing according to claim 1, wherein the plurality of supplemental apertures are distributed across a part of the reservoir surface.

10. The wound dressing according to claim 1, wherein the wound port is pre-affixed to the backing layer.

11. The wound dressing according to claim 1, further comprising a wound contact layer configured to be positioned in direct contact with the wound, the wound contact layer configured to permit substantially unidirectional fluid flow so that exudate removed from the wound is prevented from flowing back into the wound.

12. The wound dressing according to claim 11, further comprising:

an absorbent filler configured to be positioned between the reservoir surface of the wound port and the wound, wherein the absorbent filler is configured to be positioned adjacent the wound contact layer.

13. A wound dressing for positioning over a wound, the wound dressing comprising:

a backing layer configured to form a substantially fluid tight seal around a perimeter of the wound to define a reservoir in which a reduced pressure may be maintained;

a wound port configured to be affixed to the backing layer such that an ambient surface of the wound port is positioned outside of the reservoir, the wound port comprising;

a primary port extending between an opening in the ambient surface of the wound port and a primary aperture in a reservoir surface of the wound port; and

a plurality of supplemental ports establishing fluid communication between the primary port and a plurality of supplemental apertures in the reservoir surface, the plurality of supplemental apertures arranged in a planar configuration about the primary aperture, wherein each supplemental aperture of the plurality of supplemental apertures extends radially outwardly from the primary aperture.

14. A wound dressing for positioning over a wound, the wound dressing comprising:

a backing layer configured to form a substantially fluid tight seal around a perimeter of the wound to define a reservoir in which a reduced pressure may be maintained;

a wound port configured to be affixed to the backing layer such that an ambient surface of the wound port is positioned outside of the reservoir, the wound port comprising;

a primary port extending between an opening in the ambient surface of the wound port and a primary aperture in a reservoir surface of the wound port; and

a plurality of supplemental ports establishing fluid communication between the primary port and a plurality of supplemental apertures in the reservoir surface, the plurality of supplemental apertures surrounding the primary aperture, and arranged in a planar configuration about the primary aperture, wherein the plurality of supplemental apertures are distributed about a periphery of the reservoir surface.

15. A vacuum wound therapy system comprising:

a wound contact layer configured to be positioned in direct contact with a wound, the wound contact layer configured to permit substantially unidirectional fluid flow so that exudate removed from the wound is prevented from flowing back into the wound;

an absorbent filler configured to be positioned adjacent the wound contact layer;

a backing layer configured to be positioned over the wound to define a vacuum reservoir over the wound; and

a wound port comprising an opening for receiving a vacuum lumen, the port configured to be affixed to the backing layer outside the vacuum reservoir such that the absorbent filler is positioned between the port and the wound, the wound port comprising;

a primary port extending between an opening in an ambient surface of the wound port and a primary aperture in a reservoir surface of the wound port, and

a plurality of supplemental ports extending between the primary port and a plurality of supplemental apertures in the reservoir surface, the plurality of supplemental apertures surrounding the primary aperture, and arranged in a planar configuration about the primary aperture such that at least a first supplemental aperture of the plurality of supplemental apertures is not collinear with the primary aperture and a second supplemental aperture of the plurality of supplemental apertures.

16. The vacuum wound therapy system according to claim 15, wherein the absorbent filler comprises a single strand of a polyolefin filament.

17. The vacuum wound therapy system according to claim 15, further comprising a vacuum system in fluid communication with the vacuum reservoir.

18. The vacuum wound therapy system according to claim 17, wherein the vacuum system includes a vacuum source, a collection canister and a one-way valve.

19. The vacuum wound therapy system according to claim 15, wherein the supplemental apertures are distinct and substantially spaced from the primary aperture.

20. The vacuum wound therapy system according to claim 15, wherein the primary aperture and the plurality of supplemental apertures are positioned over the absorbent filler.

21. The vacuum wound therapy system according to claim 15, wherein the wound port further comprises an attachment flange adapted for connection to the backing layer.

22. The vacuum wound therapy system according to claim 15, wherein the wound port is pre-affixed to the backing layer.

23. A vacuum wound therapy system comprising:

a wound contact layer configured to be positioned in direct contact with a wound, wherein the wound contact layer is formed from a conical apertured film;

an absorbent filler configured to be positioned adjacent the wound contact layer;

a backing layer configured to be positioned over the wound to define a vacuum reservoir over the wound; and

a wound port comprising an opening for receiving a vacuum lumen, the port configured to be affixed to the backing layer outside the vacuum reservoir such that the absorbent filler is positioned between the port and the wound, the wound port comprising;

a primary port extending between an opening in an ambient surface of the wound port and a primary aperture in a reservoir surface of the wound port, and

a plurality of supplemental ports extending between the primary port and a plurality of supplemental apertures in the reservoir surface, the plurality of supplemental apertures surrounding the primary aperture, and arranged in a planar configuration about the primary aperture such that at least a first supplemental aperture of the plurality of supplemental apertures is not collinear with the primary aperture and a second supplemental aperture of the plurality of supplemental apertures.

24. A method of applying negative pressure wound therapy to a wound, the method comprising:

covering the wound with a wound dressing comprising;

a backing layer comprising a wound facing side and an opposite side; and

a wound contact layer in direct contact with the wound;

wherein the wound dressing forms a substantially fluid-tight seal with skin surrounding the wound;

affixing a wound port to the backing layer, the wound port comprising;

an opening configured to be in fluid communication with a negative pressure source;

a primary port extending through the wound port between the opening and a primary aperture; and

a plurality of supplemental ports extending between a plurality of supplemental apertures and the primary port, the plurality of supplemental apertures surrounding the primary aperture, and arranged in a planar configuration about the primary aperture such that at least a first supplemental aperture of the plurality of supplemental apertures is not collinear with the primary aperture and a second supplemental aperture of the plurality of supplemental apertures;

connecting the negative pressure source to the opening in the wound port; and

activating the negative pressure source,

wherein while negative pressure is being applied fluid flows through the wound contact layer substantially unidirectionally so that exudate removed from the wound is prevented from flowing back into the wound.

25. The method according to claim 24, further comprising placing an absorbent filler in the wound.

26. The method according to claim 25, further comprising positioning the backing layer and the wound port over the absorbent filler such that the wound facing side of the backing layer and the primary aperture and the plurality of supplemental apertures of the wound port face the absorbent filler.

27. The method according to claim 26, further comprising placing the absorbent filler over the wound contact layer.

28. The method according to claim 24, wherein the wound port further comprises an attachment flange, and wherein affixing the wound port to the backing layer includes affixing the attachment flange to the backing layer.