Back to results
US 9,844,475 B2Granted
Wound dressing
AssigneeSmith & Nephew, Inc.
InventorEdward Yerbury Hartwell
Life of this patent
Estimating the term…
Abstract
A method and apparatus are disclosed for dressing a wound. The apparatus comprises a sealing layer comprising at least one orifice, an absorbent layer over the sealing layer, absorbing wound exude and a liquid impermeable, gas permeable filter layer over the absorbent layer.
Claims25
A wound dressing for the treatment of a wound by applying negative pressure to the wound, the wound dressing comprising:
- a wound contact layer comprising a plurality of perforations through the wound contact layer that allow for fluid to pass there through;
- a porous layer above the wound contact layer;
- a sealing material in communication with the porous layer, wherein the sealing material is gas impermeable;
- an absorbent layer configured to form a reservoir for fluid removed from the wound;
- a cover layer covering the absorbent layer, wherein the cover layer extends over the absorbent layer into an edge region that is secured to the wound contact layer;
- and
- a pump positioned between the cover layer and the wound contact layer and within the absorbent layer, the pump separated from the porous layer by the sealing material, the pump configured to apply negative pressure to the wound and configured to draw fluid from the wound through the wound contact layer and the porous layer and into the absorbent layer.
4 more elements
A wound dressing for the treatment of a wound by applying negative pressure to the wound, the wound dressing comprising:
- a wound contact layer comprising a plurality of perforations through the wound contact layer that allow for fluid to pass there through;
- a porous layer above the wound contact layer;
- an absorbent layer configured to form a reservoir for fluid removed from the wound, wherein the absorbent layer is above the porous layer;
- a cover layer covering the absorbent layer, wherein the cover layer extends over the absorbent layer into an edge region that is secured to the wound contact layer;
- a pump positioned between the cover layer and the wound contact layer and within the absorbent layer, the pump configured to apply negative pressure to the wound and configured to draw fluid from the wound through the wound contact layer and the porous layer and into the absorbent layer;
- and
- a filter layer which permits air to be exhausted from the wound dressing, wherein air exhausted from the pump is configured to pass through the filter layer while allowing liquid to be absorbed and retained within the wound dressing and while negative pressure is maintained by the wound dressing.
4 more elements
Dependencies are inferred from the claim text.