Vacuum assisted wound dressing
First Claim
Patent Images
1. An apparatus for the application of topical negative pressure therapy to a wound site, the apparatus comprising:
- a wound contacting element comprising an absorbent member for retaining wound exudate fluid therein;
a wound covering element that provides a substantially airtight seal over the wound contacting element and wound site, wherein the wound covering element comprises an aperture;
a vacuum connection tube connectable to the wound covering element;
a valve interposed between the wound contacting element and the vacuum connection tube when the vacuum connection tube is connected to the wound covering element, wherein the valve is sealed to the wound covering element at the aperture in the wound covering element, wherein the valve is configured to block all liquid transport beyond itself away from the wound site and allow air transport beyond itself away from the wound site;
wherein the wound contacting element and the wound covering element are combined in a single physical entity;
wherein the valve comprises a flange that bears against an underside of the wound covering element and a circular shoulder and recess which is held in the aperture of the wound covering element;
a cup-shaped member seated onto a surface of the wound covering element over the valve; and
wherein the wound covering element is a flexible element configured to be roughly level with surrounding skin.
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Accused Products
Abstract
Apparatus for the application of topical negative pressure therapy to a wound site is described, the apparatus comprising: a wound contacting element for retaining wound exudate fluid therein; a wound covering element that provides a substantially airtight seal over the wound contacting element and wound site; a vacuum connection tube connecting a wound cavity to a vacuum source; and a vacuum source connected to a distal end of the vacuum connection tube.
1600 Citations
37 Claims
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1. An apparatus for the application of topical negative pressure therapy to a wound site, the apparatus comprising:
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a wound contacting element comprising an absorbent member for retaining wound exudate fluid therein; a wound covering element that provides a substantially airtight seal over the wound contacting element and wound site, wherein the wound covering element comprises an aperture; a vacuum connection tube connectable to the wound covering element; a valve interposed between the wound contacting element and the vacuum connection tube when the vacuum connection tube is connected to the wound covering element, wherein the valve is sealed to the wound covering element at the aperture in the wound covering element, wherein the valve is configured to block all liquid transport beyond itself away from the wound site and allow air transport beyond itself away from the wound site; wherein the wound contacting element and the wound covering element are combined in a single physical entity; wherein the valve comprises a flange that bears against an underside of the wound covering element and a circular shoulder and recess which is held in the aperture of the wound covering element; a cup-shaped member seated onto a surface of the wound covering element over the valve; and wherein the wound covering element is a flexible element configured to be roughly level with surrounding skin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for the application of topical negative pressure therapy to a wound site, the apparatus comprising:
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a wound covering element configured to be positioned over a wound, wherein the wound covering element comprises an aperture; a cup-shaped member separate from the wound covering element and seated onto a surface of the wound covering element and configured to be secured over the aperture in the wound covering element, the cup-shaped member comprising a radially outwardly-extending flange portion defining a lower opening configured to seat onto an upper surface of the wound covering element surrounding the aperture and form a seal with the wound covering element; a vacuum connection tube configured to be connected to the cup-shaped member; and
,a wound dressing portion configured to substantially prevent all wound exudate from being aspirated into the vacuum connection tube or out of the wound dressing portion, the wound dressing portion comprising an absorbent material configured to be placed over the wound and under the wound covering element, the absorbent material configured to retain wound exudate therein upon application of negative pressure; wherein the cup-shaped member includes a liquid blocking material held underneath the cup-shaped member and mounted at the lower opening defined by the flange portion, wherein the liquid blocking material is configured to substantially prevent all wound exudate from being aspirated into the vacuum connection tube; and wherein the wound covering element is a flexible element configured to be roughly level with surrounding. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for the application of topical negative pressure therapy to a wound site, the method comprising:
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placing a wound dressing portion comprising an absorbent material over the wound site; sealing the wound site with a flexible wound covering capable of providing a substantially airtight seal over the wound site, the flexible wound covering being roughly level with surrounding skin; applying topical negative pressure to the wound site through a conduit connected to the wound covering via a cup-shaped member separate from the wound covering and seated onto a surface of the wound covering element and secured over an aperture in the wound covering element, the cup-shaped member comprising a radially outwardly-extending flange portion that defines a lower opening, wherein a liquid blocking element is mounted at the lower opening in the flange portion and held relative to the cup-shaped member; retaining fluid from the wound site in the absorbent material; and
,preventing substantially all liquid from the wound site from entering the conduit with the liquid blocking element, wherein the liquid blocking element blocks substantially all liquid transport beyond itself away from the wound site. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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Specification