JPWO2020159675A5 - - Google Patents

Claims (16)

a first layer comprising a first film of non-porous material having a plurality of openings;
a second layer adjacent to the first layer, the second layer comprising a manifold having a plurality of slits;
a third layer adjacent to the second layer and comprising a second film of non-porous material having raised features;
A dressing, wherein at least some of the plurality of openings, some of the plurality of slits, and some of the raised features are aligned to define a tear line. 2. The dressing of claim 1, wherein said manifold comprises polyurethane foam. said first film comprising a polyurethane material;
2. The dressing of Claim 1, wherein said second film comprises a polyurethane material. The plurality of openings and the plurality of slits form a plurality of fenestrations extending through the first layer and the second layer to create aligned opening-slit pairs. is formed by
2. The dressing of claim 1, wherein each of said plurality of fenestrations has a length of 1 mm to 5 mm. 2. The dressing of claim 1, wherein said first film is an adhesive coated film. the plurality of openings distributed across the first layer in parallel rows and columns;
2. The dressing of claim 1, wherein the rows are spaced about 3 mm apart on center. the plurality of openings distributed across the first layer in parallel rows and columns;
the rows are spaced 3 mm apart on center;
2. The dressing of claim 1, wherein the openings in each of the rows are about 3 mm apart on center. 8. The dressing of claim 7 , wherein the plurality of openings in adjacent rows are offset. wherein said second film is an adhesive coated film;
2. The dressing of claim 1, wherein said second film is laminated to said second layer. 2. A dressing according to claim 1, wherein said second film is a highly breathable film. 2. The dressing of claim 1, wherein at least some of said plurality of openings, some of said plurality of slits, and some of said raised features are aligned in a circular pattern. material. 2. The method of claim 1, wherein at least some of the plurality of openings, some of the plurality of slits, and some of the raised features are aligned in a linear pattern. dressing material. 2. The dressing of claim 1, wherein said plurality of openings are distributed across said first layer in vertical rows. A system for treating a tissue site, comprising:
A wound filler,
a first layer comprising a first film of non-porous material;
a second layer adjacent to the first layer, the second layer comprising a foam;
a third layer adjacent to said second layer and comprising a second film of non-porous material having raised features; and a plurality of openings extending through said first layer and said second layer. a wound filler comprising a window;
a plurality of sealing strips adapted to be positioned on the perimeter of the third layer opposite the second layer;
an interface adapted to be bonded to the wound filler. 15. The system of claim 14 , further comprising a negative pressure source adapted to be fluidly coupled to the wound filler through the interface. said first film comprising a polyurethane material;
15. The system of claim 14 , wherein said foam comprises polyurethane foam.