Wound treatment employing reduced pressure
DC CAFCFirst Claim
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1. An appliance for administering a reduced pressure treatment to a wound, comprising:
- (a) a one-piece flexible adhesive cover configured to cover and enclose the wound and adapted to maintain reduced pressure at the site of the wound;
(b) reduced pressure supply means for connection to a source of suction, said reduced pressure supply means cooperating with said cover to supply at least 0.11 atm of reduced pressure; and
a fluid trap interconnected between said reduced pressure supply means and said cover for collection of wound exudate.
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Abstract
A method of treating tissue damage comprises applying a negative pressure to a wound sufficient in time and magnitude to promote tissue migration and thus facilitate closure of the wound. The method is applicable to wounds, burns, infected wounds, and live tissue attachments. A wound treatment apparatus is provided in which a fluid impermeable wound cover is sealed over a wound site. A screen in the form of an open-cell foam screen or a rigid porous screen is placed beneath the wound cover over the wound. A vacuum pump supplies suction within the wound cover over the treatment site.
749 Citations
125 Claims
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1. An appliance for administering a reduced pressure treatment to a wound, comprising:
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(a) a one-piece flexible adhesive cover configured to cover and enclose the wound and adapted to maintain reduced pressure at the site of the wound; (b) reduced pressure supply means for connection to a source of suction, said reduced pressure supply means cooperating with said cover to supply at least 0.11 atm of reduced pressure; and a fluid trap interconnected between said reduced pressure supply means and said cover for collection of wound exudate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 16, 17, 80, 91)
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8. An appliance for administering a reduced pressure treatment to a wound comprising:
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(a) a flexible cover adapted to cover and enclose the wound and adapted to maintain reduced pressure at the site of the wound; (b) a continuous, uninterrupted adhesive seal provided on said cover adapted to seal and adhere said cover to tissue surrounding the wound; (c) a source of suction, cooperating with said cover to supply at least 0.11 atm of reduced pressure; and (d) a fluid trap interconnected between said cover and said source of suction, said trap adapted to capture wound exudate. - View Dependent Claims (9, 10, 11, 81, 92)
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12. An apparatus for treating a wound comprising:
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(a) a vacuum system adapted to produce a reduced pressure, wherein said vacuum system includes a collection device for collecting fluid aspirated from the wound; and (b) a reduced pressure appliance operably connected with said vacuum system adapted to apply said reduced pressure to the wound, the appliance including; a flexible cover adapted to cover and enclose the wound and adapted to maintain reduced pressure at the site of the wound; a porous material comprising a synthetic polymer for placement under said cover at the wound; an adhesive seal provided on said cover and adapted to seal and adhere said cover to tissue surrounding the wound; and reduced pressure supply means for connection with the vacuum system adapted to supply said reduced pressure within said cover to the wound. - View Dependent Claims (13, 14, 15, 18, 19, 82, 98, 99, 100, 101, 102)
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20. A method for treating a wound, comprising:
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i. locating a flexible adhesive cover over the wound to provide a chamber between the cover and the wound, said cover adapted for maintaining reduced pressure at the wound; ii. adhesively sealing and adhering the periphery of said cover to tissue surrounding the wound; iii. operably connecting a vacuum system with said chamber at said seal for producing said reduced pressure; iv. interposing a fluid trap between said cover and said vacuum system; and v. maintaining reduced pressure to promote the formation of granulation tissue at the wound until the wound has progressed toward a selected stage of healing. - View Dependent Claims (21, 22, 23, 83, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125)
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24. An appliance for administering a reduced pressure treatment to a wound comprising:
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(a) a one-piece flexible sheet adapted to cover and enclose the wound and adapted to maintain reduced pressure at the site of the wound; (b) a porous material comprising a synthetic polymer for placement under the sheet at the wound; (c) an adhesive seal provided on said sheet adapted to seal and adhere said sheet to tissue surrounding the wound; (d) a source of suction cooperating with said sheet and said seal to supply reduced pressure beneath said sheet; and (e) a fluid trap interposed between said sheet and said source of suction, said fluid trap including a shut off for halting the application of reduced pressure when a predetermined amount of fluid is collected within said trap. - View Dependent Claims (25, 26, 27, 28, 84, 93, 94, 95, 96, 97)
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29. An appliance for administering a reduced pressure treatment to a wound comprising:
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(a) a one-piece flexible cover adapted to cover and enclose the wound and to provide a vacuum chamber about the wound to maintain reduced pressure at the site of the wound; (b) an adhesive seal provided on said cover adapted to seal and adhere said cover to tissue surrounding the wound; (c) reduced pressure supply means for connection to a source of suction, said reduced pressure supply means cooperating with said vacuum chamber to supply said reduced pressure of at least 0.11 atm beneath said vacuum chamber, wherein said reduced pressure supply means comprises a suction port on said vacuum chamber; and (d) a screen adapted to promote the formation of granulation tissue at the wound for placement at a location within said vacuum chamber and secured in said location by the periphery of said vacuum chamber. - View Dependent Claims (30, 31, 32, 33, 34, 85)
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35. An apparatus for treating a wound comprising:
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(a) a vacuum system adapted to produce a reduced pressure, wherein said vacuum system comprises; i. a vacuum pump adapted to supply at least 0.11 atm of reduced pressure; and ii. a filter for preventing said pump from venting micro-organisms aspirated from the wound; and (b) a reduced pressure appliance operably connected with said vacuum system adapted to apply said reduced pressure to the wound, the appliance including; a flexible cover adapted to cover and enclose the wound and adapted to maintain reduced pressure at the site of the wound; a porous material comprising a synthetic polymer for placement under the cover at the wound; an adhesive seal disposed about the periphery of said cover and adapted to seal and adhere said cover to tissue surrounding the wound; reduced pressure supply means for connection with the vacuum system, wherein said reduced pressure supply means comprises a length of tubing connected between said vacuum system and said cover; and a fluid trap interposed between said cover and said reduced pressure supply means. - View Dependent Claims (36, 37, 38, 39, 40, 41, 86)
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42. A method of treating a wound comprising the steps of:
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i. providing a vacuum source capable of providing at least 0.11 atm of reduced pressure; ii. locating a flexible adhesive cover over the wound, said cover having a suction port; iii. Locating a porous material comprising a synthetic polymer under said cover at the wound; iv. adhesively sealing and adhering the periphery of said cover to tissue surrounding the wound to form a continuous seal; v. operably connecting said suction port with said vacuum system for producing said reduced pressure; v. interposing a fluid trap between said suction port and said vacuum source; and vi. maintaining reduced pressure of at least 0.11 atm at the wound until the wound had progressed toward a selected stage of healing. - View Dependent Claims (43, 44, 45, 46, 87)
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47. A device for promoting closure of a wound comprising:
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(a) a deformable cover adapted to be placed over the wound; (b) a porous material comprising a synthetic polymer disposed under said cover for placement at the wound; (c) an adhesive layer on the cover adapted to form a liquid impermeable seal between said cover and tissue surrounding the wound; and (d) reduced pressure supply means for supplying reduced pressure and adapted to maintain at least 0.11 atm of reduced pressure therein to said enclosed volume and for deforming said cover so as to exert tension upon the tissue surrounding the wound; and (e) a fluid trap interposed between said cover and said supply means. - View Dependent Claims (48, 49, 50, 88, 103, 104, 105, 106, 107)
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51. A method of promoting attachment of a skin graft onto a wound, comprising the steps of:
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(a) attaching the graft to the wound; and (b) applying reduced pressure to the graft to promote blood circulation within the graft, wherein said applying step comprises the steps of; i. placing a porous screen over the graft on the wound; ii. locating a cover over the graft on the wound, said cover adapted for maintaining said reduced pressure at the wound, said cover having a suction port; iii. sealing the periphery of said cover to tissue surrounding the wound; iv. operably connecting said suction port with a vacuum system for producing said reduced pressure; and v. interposing a fluid trap between said suction port and said vacuum source. - View Dependent Claims (52, 53)
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54. An apparatus for facilitating the healing of wounds, comprising:
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a flexible cover adapted to cover and enclose a wound and adapted to maintain reduced pressure at the site of the wound; a porous material comprising a synthetic polymer disposed under said cover for placement at the wound; a suction pump for creating a reduced pressure of at least 0.11 atm on the area of tissue including and surrounding the wound; and a liquid impermeable adhesive seal provided on said cover adapted to seal and adhere said cover to tissue surrounding the wound reduced pressure at said wound. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 89)
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71. An apparatus for treating a wound, comprising:
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a flexible adhesive cover adapted to cover and enclose a wound and adapted to maintain reduced pressure at the site of the wound; a porous material comprising a synthetic polymer for placement under the cover at the wound; a liquid impermeable adhesive seal provided on said cover adapted to seal and adhere said cover to tissue surrounding the wound; a tubular member having an end extending from beneath the seal edge to a location external to said cover for supplying reduced pressure beneath the cover; and a fluid trap in fluid communication with said tubular member, said fluid trap including a shut off for halting the application of reduced pressure when a predetermined amount of fluid is collected within said trap. - View Dependent Claims (72, 73, 74, 75, 76, 77, 78, 79, 90)
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Specification