Systems and methods for applying reduced pressure therapy
Embodiments disclosed herein are directed to the treatment of wounds using negative pressure. Some embodiments disclosed herein provide for a hydrophilic drainage layer, which may be suitable for use in abdominal wound sites, and which may be sized in a dimensionally-independent manner. Additional embodiments provide for an organ protection layer, as well as a system for the treatment of abdominal wounds.
1. A system for the treatment of a wound site using negative pressure, the system comprising:
a porous pad suitable for the transmission of negative pressure to the wound site;
a drainage layer positioned under the porous pad, the drainage layer configured to channel fluid from the wound site;
a flexible drape configured to be placed over the porous pad;
a source of negative pressure;
a conduit configured to transmit negative pressure from the source to the flexible drape; and
wherein the drainage layer comprises a hydrophilic foam and one or more film layers, the one or more film layers comprising a channel extending from an edge of the drainage layer to a center of the drainage layer such that the hydrophilic foam beneath the channel is uncovered by the one or more film layers.
2. The system of claim 1 , wherein the hydrophilic foam comprises polyvinyl alcohol (PVA).
3. The system of claim 1 , wherein the drainage layer comprises a top film layer over the hydrophilic foam.
4. The system of claim 1 , wherein the drainage layer comprises a bottom film layer under the hydrophilic foam.
5. The system of claim 1 , wherein the one or more film layers comprise a material selected from the group comprising polyurethane, polyethylene, polytetrafluoroethylene, or blends thereof.
6. The system of claim 1 , wherein the one or more film layers cover at least part of a side wall of the drainage layer.
7. The system of claim 1 , wherein the one or more film layers covers less than 100% of a surface area of a bottom surface and/or a top surface of the hydrophilic foam.
8. The system of claim 7 , wherein the one or more film layers cover less than 70% of the surface area of the bottom surface and/or the top surface of the hydrophilic foam.
9. The system of claim 8 , wherein the one or more film layers cover less than 30% of the surface area of the bottom surface and/or the top surface of the hydrophilic foam.
10. The system of claim 7 , wherein an uncovered portion of the hydrophilic foam layer is in the shape selected from the group consisting of asterisk shape, spiral shape, cross-hatch shape, starfish shape, and lobe shape.
11. The system of claim 1 , wherein the drainage layer is provided with a thickness less than its width and length, wherein the drainage layer further comprises at least one cut extending through at least a portion of the thickness of the drainage layer to define a section detachable from the drainage layer to permit the drainage layer to be sized in a dimensionally-independent manner wherein the length and the width of the drainage layer can be modified independently of each other.
12. The system of claim 1 , further comprising an organ protection layer.
13. The system of claim 1 , further comprising a port attachable to an aperture formed in the drape and the conduit.
14. A method of treating a wound site using negative pressure, wherein the treatment comprises:
placing a hydrophilic drainage layer onto the wound site, the drainage layer comprising a hydrophilic foam and a film layer, the film layer comprising a channel extending from an edge of the drainage layer to a center of the drainage layer such that the hydrophilic foam beneath the channel is uncovered by the film layer;
placing a porous pad over the hydrophilic drainage layer;
sealing the wound site with a flexible drape positioned over the wound and sealed to the skin surrounding the wound; and
applying negative pressure to the wound site from a source of negative pressure, wherein the source of negative pressure is applied through a conduit fluidically connected between the drape and the source of negative pressure.
15. The method of claim 14 , wherein the hydrophilic drainage layer comprises a polyvinyl alcohol (PVA) foam.
16. The method of claim 14 , wherein the treatment further comprises placing an organ protection layer onto the wound site.
17. The method of claim 14 , wherein the hydrophilic drainage layer comprises an organ protection layer.
18. The method of claim 14 , wherein the side wall of the hydrophilic drainage layer touches onto the wound site.
19. The system of claim 1 , further comprising an acquisition distribution layer positioned adjacent the drainage layer, the acquisition distribution layer comprising a plurality of fibers and configured to wick fluid.