Patent ID: 8721606

Claim:
A dressing for distributing reduced pressure to a tissue site, the dressing comprising: at least two liquid-impermeable layers forming opposing sides of the dressing, each liquid-impermeable layer positioned in a stacked relationship adjacent at least one other liquid-impermeable layer, and each liquid-impermeable layer having a plurality of contact sites each proximate a contact site of an adjacent liquid-impermeable layer and a surface area between the contact sites coextensive with the surface area of the adjacent liquid-impermeable layer, wherein fenestrations are formed in the surface area of each liquid-impermeable layer; a plurality of spacers, each spacer at least partially formed at a contact site between the adjacent liquid-impermeable layers to provide displacement between the surface areas of the adjacent liquid-impermeable layers, wherein the plurality of spacers include a plurality of bonds forming a spaced pattern, each individual bond having an aspect ratio greater than three, a circular shape and coupling at least two of the adjacent liquid-impermeable layers at the contact site; and a plurality of flow paths formed by the plurality of spacers, the flow paths extending from a first side of the dressing formed by a first layer through the fenestrations to a second side of the dressing formed by a second layer of the adjacent liquid-impermeable layers for allowing fluid flow under reduced pressure through the adjacent liquid-impermeable layers to the tissue site.