Absorbent dressing and method

A system for treating a tissue site, comprising:

• a dressing adapted to distribute reduced pressure from a reduced-pressure source to the tissue site, comprising:
• a manifold layer adapted to be positioned proximate the tissue site,
• a storage layer positioned proximate the manifold layer,
• a fluid communication channel disposed through the storage layer, and
• a retainer disposed in the fluid communication channel, wherein the retainer is adapted to substantially preclude deformation of the storage layer into the fluid communication channel;
• and
• a sealing member adapted to cover the dressing and to provide a fluid seal between the sealing material and the tissue site.

A system for treating a tissue site, comprising:

• a dressing adapted to distribute reduced pressure from a reduced-pressure source to the tissue site, comprising:
• a manifold layer adapted to be positioned proximate the tissue site,
• a first storage layer positioned proximate the manifold layer, the first storage layer having a plurality of first apertures disposed in the first storage layer, each of the first apertures defining a first fluid communication channel through the first storage layer, and
• a second storage layer positioned in fluid communication with the first storage layer, the second storage layer having a plurality of second apertures disposed in the second storage layer, each of the second apertures defining a second fluid communication channel through the second storage layer, wherein the first fluid communication channels are positioned laterally offset from the second fluid communication channels;
• and
• a sealing member adapted to cover the dressing and to provide a fluid seal between the sealing member and the tissue site.

A method of manufacturing a dressing for treating a tissue site, comprising:

• providing a manifold material;
• providing an absorbent material;
• positioning the manifold material adjacent the absorbent material;
• cutting across the manifold material and the absorbent material to form a first storage layer and a second storage layer, wherein the first and the second storage layer each comprise a portion of the manifold material and the absorbent material;
• and
• positioning the first storage layer in fluid communication with the second storage layer, wherein the portion of manifold material in the first storage layer is positioned laterally offset from the portion of manifold material in the second storage layer.