EP-4739264-A1 - NEGATIVE PRESSURE WOUND THERAPY DEVICES AND METHODS

Abstract

A negative pressure wound treatment system and methods for using such a system are described. Preferred embodiments facilitate closure of the wound by preferentially contracting to provide for movement of the tissue. Some embodiments may include wound dressing devices having a wound filler and a laminated substrate layer. Some embodiments may include an assembly of wound dressing devices conformable to a wound.

Inventors

• ASPIOTI, Maria
• BROWNHILL, Varuni, Rachindra
• HAY, Cameron, George
• HUNT, Allan, Kenneth, Frazer, Grugeon
• MORTIMER, Samuel, John
• PARRY, Luke, Michael
• RAWSON, Neill, John
• WEEDON, Hannah, Bailey

Assignees

• T.J.Smith and Nephew,Limited

Dates

Publication Date

20260513

Application Date

20240703

Claims (20)

1. 1. A wound dressing for use in negative pressure wound therapy, the wound dressing comprising: a porous wound filler; and a laminated substrate layer configured to reduce shedding of particles from the porous wound filler.
2. 2. The wound dressing of claim 1, wherein the laminated substrate layer is positioned on the bottom of the porous wound filler.
3. 3. The wound dressing of claim 1, wherein the laminated substrate layer is positioned on the top of the porous wound filler
4. 4. The wound dressing of claim 1, comprising a top laminated substrate layer and a bottom laminated substrate layer.
5. 5. The wound dressing of any one of the previous claims, wherein the wound filler comprises foam.
6. 6. The wound dressing of any one of the previous claims wherein the wound filler comprises slits.
7. 7. The wound dressing of claim 6, wherein the slits are arranged in an alternating pattern of slits, individual slits oriented 90 degrees from individual adjacent slits.
8. 8. The wound dressing of any one of the previous claims, wherein the wound filler comprises a plurality of castellations on a surface of the wound filler.
9. 9. The wound dressing of claim 8, wherein the wound filler comprises a plurality of castellations on a top surface of the wound filler and on a bottom surface of the wound filler.
10. 10. The wound dressing of any one of the previous claims, wherein the laminated substrate layer or layers comprise silicone.
11. 11. The wound dressing of any one of the previous claims, wherein the laminated substrate layer or layers are transparent.
12. 12. The wound dressing of any one of the previous claims, wherein the laminated substrate layer or layers comprise perforations.
13. 13. The wound dressing of claim 12, wherein the shape of the perforations are selected from the group consisting of a circle, oval, oblong, square, or rectangle.
14. 14. The wound dressing of claims 12-13, wherein the perforations are arranged in a staggered pattern.
15. 15. The wound dressing of any one of the previous claims, wherein the wound filler comprises a plurality of holes extending at least partially through a thickness of the wound filler.
16. 16. The wound dressing of claim 15, further comprising individual plugs positioned in individual holes, the plugs comprising a material different from the wound filler.
17. 17. The wound dressing of claim 16, wherein individual plugs comprise an active ingredient.
18. 18. A wound treatment apparatus for use in negative pressure wound therapy, the wound treatment apparatus comprising: an assembly of interconnected conformable wound dressings, individual conformable wound dressings comprising a porous wound filler encased in a perforated substrate layer.
19. 19. The wound treatment apparatus of claim 18, wherein the wound filler comprises wool.
20. 20. The wound treatment apparatus of any one of claims 18-19, wherein the substrate layer comprises silicone.

Description

NEGATIVE PRESSURE WOUND THERAPY DEVICES AND METHODS BACKGROUND Technical Field [0001] Embodiments described herein relate to apparatuses, systems, and methods for the treatment of wounds, for example using dressings in combination with negative pressure wound therapy. Description of the Related Art [0002] Many different types of wound dressings are known for aiding in the healing process of a human or animal. These different types of wound dressings include many different types of materials and layers, for example, gauze, pads, foam pads or multilayer wound dressings. Topical negative pressure (TNP) therapy, sometimes referred to as vacuum assisted closure, negative pressure wound therapy, or reduced pressure wound therapy, is widely recognized as a beneficial mechanism for improving the healing rate of a wound. Such therapy is applicable to a broad range of wounds such as incisional wounds, open wounds, and abdominal wounds or the like. TNP therapy assists in the closure and healing of wounds by reducing tissue edema, encouraging blood flow, stimulating the formation of granulation tissue, removing excess exudates and may reduce bacterial load. Thus, reducing infection to the wound. Furthermore, TNP therapy permits less outside disturbance of the wound and promotes more rapid healing. [0003] Existing negative pressure therapy wound fillers, such as foam or gauze, may shed fibers and/or particulates into a wound, which can cause inflammation, redness, irritation, infection, and/or increased wound treatment time. Further, removal of foam or gauze wound filler materials may cause pain to a patient and potentially inadvertently cause removal of healthy granulated tissue from the wound. [0004] Further, because wounds are of different shapes and/or sizes, foam, gauze, or other wound fillers may need to be sized, shaped, layered, or otherwise prepared to better accommodate such variation in size and shape. Although existing foam, gauze, or other wound fillers may be cut to certain size or shape, the adjustment may be limited by various factors, such as the size or the shape of the original foam, gauze, or other wound fillers. Additionally, a wound may change in size or shape as negative pressure treatment is applied to the wound. [0005] Accordingly, there is a need to provide for an improved apparatus, method, and system for the treatment and closure of wounds. SUMMARY [0006] Embodiments of the present disclosure relate to materials, devices, methods, and systems for wound treatment. Some disclosed embodiments relate to materials, devices, methods, and systems for delivering negative pressure to a wound. It will be understood by one of skill in the art that application of the materials, devices, methods, and systems described herein are not limited to a particular tissue or a particular injury. [0007] In some examples, a wound dressing for use in negative pressure wound therapy may comprise a porous wound filler and a laminated substrate layer configured to reduce shedding of particles from the porous wound filler. The laminated substrate layer may be positioned on the bottom and/or the top of the porous wound filler. The wound dressing may comprise foam or slits. The slits may be arranged in an alternating pattern, individual slits oriented 90 degrees from individual adjacent slits. The wound filler may comprise a plurality of castellations on a surface of the wound filler. The wound filler may comprise a plurality of castellations on a top surface of the wound filler and on a bottom surface of the wound filler. In some examples, the laminated substrate layer or layers may comprise silicone. The laminated substrate layer or layers may be transparent. The laminated substrate layer or layers may comprise perforations. The shape of the perforations may be a circle, oval, oblong, square, or rectangle. The perforations may be arranged in a staggered pattern. The wound filler may comprise a plurality of holes extending at least partially through a thickness of the wound filler. The wound dressing may further comprise individual plugs positioned in individual holes, the plugs comprising a material different from the wound filler. In certain examples, individual plugs may comprise an active ingredient. [0008] In certain examples, a wound treatment apparatus for use in negative pressure wound therapy may comprise an assembly of interconnected conformable wound dressings, individual conformable wound dressings comprising a porous wound filler encased in a perforated substrate layer. The wound filler may comprise wool. The substrate layer may comprise silicone. In certain examples, individual conformable wound dressings may be configured to be removed from the assembly such that the assembly is shaped to the contours of a wound. The wound treatment apparatus may comprise connections to connect the interconnected conformable wound dressings. Individual connections may comprise perforations. Individual connections may co