Shear resistant wound dressing for use in vacuum wound therapy
First Claim
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1. A negative pressure wound therapy dressing comprising:
- a backing layer comprising a flexible polymeric membrane, the backing layer including a lower wound facing side, an upper side opposite the lower wound facing side, and an aperture extending through the backing layer;
a porous layer disposed below the lower wound facing side of the backing layer;
an absorbent filler, wherein the absorbent filler is configured to be in fluid communication with the porous layer and configured to collect exudate removed from a wound; and
a vacuum port configured to be fluidically connected, via a tube, to a negative pressure source, wherein the vacuum port comprises;
a flange having an underside and a top side, wherein the underside of the flange has an opening positioned over the aperture in the backing layer and the underside of the flange is positioned on the upper side of the backing layer; and
a connector extending above the flange, the connector configured to be connected to the tube;
a screen positioned across the opening on the underside of the flange configured to prevent migration of particles into the vacuum port, wherein the screen comprises openings having a size configured to prevent migration of particles into the vacuum port, the size of the openings being large enough for liquid wound exudate to pass through the screen.
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Abstract
A cover layer for a vacuum wound therapy dressing includes a backing layer formed from a flexible polymeric membrane and an adhesive layer for affixing the backing layer over a wound bed to provide a substantially fluid-tight seal around a perimeter of the wound bed. The cover layer is reinforced with a reinforcement layer extending to a peripheral region of the backing layer to distribute forces associated with evacuating a reservoir, as defined by or within the cover, to stimulate healing of the wound bed.
365 Citations
20 Claims
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1. A negative pressure wound therapy dressing comprising:
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a backing layer comprising a flexible polymeric membrane, the backing layer including a lower wound facing side, an upper side opposite the lower wound facing side, and an aperture extending through the backing layer; a porous layer disposed below the lower wound facing side of the backing layer; an absorbent filler, wherein the absorbent filler is configured to be in fluid communication with the porous layer and configured to collect exudate removed from a wound; and a vacuum port configured to be fluidically connected, via a tube, to a negative pressure source, wherein the vacuum port comprises; a flange having an underside and a top side, wherein the underside of the flange has an opening positioned over the aperture in the backing layer and the underside of the flange is positioned on the upper side of the backing layer; and a connector extending above the flange, the connector configured to be connected to the tube; a screen positioned across the opening on the underside of the flange configured to prevent migration of particles into the vacuum port, wherein the screen comprises openings having a size configured to prevent migration of particles into the vacuum port, the size of the openings being large enough for liquid wound exudate to pass through the screen. - 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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Specification