Wound dressing
First Claim
Patent Images
1. An apparatus for the treatment of a wound by applying negative pressure to the wound, the apparatus 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 layer configured to cover the porous layer, wherein the sealing layer is configured to form a chamber over the wound in which a negative pressure can be established;
a hole in the sealing layer;
a pump configured to be in communication with the hole in the sealing layer to apply negative pressure to the wound and configured to draw fluid from the wound into the porous material;
an absorbent layer above the sealing layer, the pump positioned within the absorbent layer; and
a cover layer configured to cover the pump and the absorbent layer, wherein the cover layer is configured to seal with the sealing layer.
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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.
601 Citations
35 Claims
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1. An apparatus for the treatment of a wound by applying negative pressure to the wound, the apparatus comprising:
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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 layer configured to cover the porous layer, wherein the sealing layer is configured to form a chamber over the wound in which a negative pressure can be established; a hole in the sealing layer; a pump configured to be in communication with the hole in the sealing layer to apply negative pressure to the wound and configured to draw fluid from the wound into the porous material; an absorbent layer above the sealing layer, the pump positioned within the absorbent layer; and a cover layer configured to cover the pump and the absorbent layer, wherein the cover layer is configured to seal with the sealing layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A reduced-pressure source for use with a reduced-pressure system for treating a wound on a patient, the reduced-pressure source comprising:
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a pump disposed within a sealed space, wherein a cover member is configured to form a seal over the wound and defines at least a portion of the sealed space; a pump inlet fluidly coupled to the pump and configured to discharge reduced pressure out of the pump to a reduced-pressure chamber, wherein the reduced-pressure chamber is defined between the cover member and the wound; an exhaust outlet fluidly coupled to the pump and configured to discharge an exhaust gas from the pump to the sealed space; and wherein the cover member is formed from a polymeric, porous, hydrophobic material and configured so that the exhaust gas exits the sealed space through the cover member under pressure; and wherein the cover member comprises a filter layer and a cover layer. - View Dependent Claims (22, 23)
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24. A reduced-pressure source for use with a reduced-pressure system for treating a wound on a patient, the reduced-pressure source comprising:
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a pump disposed within a sealed space, wherein a cover member is configured to form a seal over the wound and defines at least a portion of the sealed space; a pump inlet fluidly coupled to the pump and configured to discharge reduced pressure out of the pump to a reduced-pressure chamber, wherein the reduced-pressure chamber is defined between the cover member and the wound; an exhaust outlet fluidly coupled to the pump and configured to discharge an exhaust gas from the pump to the sealed space; and wherein the cover member is formed from a polymeric, porous, hydrophobic material and configured so that the exhaust gas exits the sealed space through the cover member under pressure; and wherein the cover member is sealed to a sealing layer, wherein the sealed space is defined between the cover member and the sealing layer. - View Dependent Claims (25, 26)
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27. A system for treating a wound on a patient with reduced pressure, the system comprising:
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a porous layer for placing proximate to the wound for distributing reduced pressure to the wound; a reduced-pressure source fluidly coupled to the porous layer for providing reduced pressure to the porous layer; and a sealing layer for forming a fluid seal over the wound; and wherein the reduced-pressure source comprises; a pump disposed in a sealed space, wherein a cover member is configured to form a seal over the wound and defines at least a portion of the sealed space, a pump inlet fluidly coupled to the pump and configured to discharge reduced pressure out of the pump to a reduced-pressure chamber, wherein the reduced-pressure chamber is defined between the cover member and the wound, an exhaust outlet fluidly coupled to the pump and configured to discharge an exhaust gas from the pump to the sealed space, and wherein the cover member is formed by a polymeric, porous, hydrophobic material configured so that the exhaust gas exits the sealed space through the cover member under pressure; and wherein the cover member comprises a filter layer and a cover layer. - View Dependent Claims (28, 29)
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30. A system for treating a wound on a patient with reduced pressure, the system comprising:
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a porous layer for placing proximate to the wound for distributing reduced pressure to the wound; a reduced-pressure source fluidly coupled to the porous layer for providing reduced pressure to the porous layer; and a sealing layer for forming a fluid seal over the wound; and wherein the reduced-pressure source comprises; a pump disposed in a sealed space, wherein a cover member is configured to form a seal over the wound and defines at least a portion of the sealed space, a pump inlet fluidly coupled to the pump and configured to discharge reduced pressure out of the pump to a reduced-pressure chamber, wherein the reduced-pressure chamber is defined between the cover member and the wound, an exhaust outlet fluidly coupled to the pump and configured to discharge an exhaust gas from the pump to the sealed space, and wherein the cover member is formed by a polymeric, porous, hydrophobic material configured so that the exhaust gas exits the sealed space through the cover member under pressure; and wherein the cover member is sealed to the sealing layer, wherein the sealed space is defined between the cover member and the sealing layer. - View Dependent Claims (31, 32)
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33. A method of treating a wound with reduced pressure, the method comprising:
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forming a sealed space configured to block the passage of liquids, wherein at least a portion of the sealed space is formed by a cover member comprising a polymeric, porous, hydrophobic material, wherein the cover member is configured to form a seal over the wound and comprises a filter layer and a cover layer; disposing a pump within the sealed space, wherein the pump includes a pump inlet and an exhaust outlet; discharging a reduced pressure out of the pump to a reduced-pressure chamber, wherein the reduced-pressure chamber is defined between the cover member and the wound; discharging an exhaust gas from the pump through the exhaust outlet to the sealed space; exhausting the exhaust gas substantially from the sealed space through the cover member; and delivering the reduced pressure to the wound. - View Dependent Claims (34, 35)
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Specification