Laminar dressings, systems, and methods for applying reduced pressure at a tissue site
AssigneeKCI Licensing, Inc.
InventorJonathan Scott Olson
Life of this patent
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Abstract
A system for applying a reduced pressure at a tissue site includes a reduced pressure source, a porous pad in fluid communication with the reduced pressure source, and a drape positionable over the porous pad to seal the porous pad at the tissue site. The porous pad includes a plurality of channel walls to form a plurality of channels between the channel walls. The channel walls are substantially liquid impermeable to prevent movement of a liquid through the channel walls but are gas permeable to allow movement of a gas through the channel walls as reduced pressure is applied at the tissue site. The liquid impermeability of the channel walls and the application of reduced pressure causes flow of the liquid to occur through the plurality of channels.
Claims46
A system for applying a reduced pressure at a tissue site, the system comprising:
- a reduced pressure source operable to supply reduced pressure;
- a porous pad in fluid communication with the reduced pressure source, the porous pad having a plurality of channel walls forming a plurality of channels through the porous pad, the channel walls being gas permeable and substantially liquid impermeable, and an open-cell, reticulated foam positioned between the plurality of channel walls to exert a biasing force on the channel walls;
- and
- a drape positionable over the porous pad to seal the porous pad at the tissue site such that reduced pressure can be maintained at the tissue site.
A dressing for applying a reduced pressure at a tissue site, the dressing comprising:
- a laminar layer having a plurality of parallel channel walls that form a plurality of channels through the laminar layer;
- and
- a biasing member positioned between at least two of the plurality of channel walls.
A dressing for applying a reduced pressure at a tissue site, the dressing comprising:
- a porous pad having a plurality of channel walls forming a plurality of channels between the channel walls, the channel walls being gas permeable and substantially liquid impermeable;
- a biasing member positioned between at least two of the plurality of channel walls;
- and
- a second porous pad adapted to be positioned between the tissue site and the first porous pad.
Dependencies are inferred from the claim text.