A medical gauze and gas flow assembly and method of applying a medical gauze with gas flow over a wound, provides a medical dressing cover that couples to a gas flow framing structure. The gas flow framing structure provides a flow of gas over a wound. A medical grade gauze material adheres to the lower surface of the medical dressing cover, so as to create spacing between the medical grade gauze material and the wound treatment area. The gas flow is directed between the medical grade gauze material and the wound treatment area. The gas flow vents to ambient though the gas permeable medical dressing cover. When degraded, the assembly is replaced or only the medical dressing cover and medical grade gauze material is replaced. The synergistic combination of a medical grade gauze material that is a gas permeable, with a gas flow structure that discharges gas over the wound enhances healing the wound.

A wound irrigation system and method of making and using. The system uses a pored, closed-ended delivery conduit to enhance the consistency and speed with which anti-microbial or related irrigation fluids may be delivered in order to promote cleansing, debridement and biofilm reduction in wounds. The ease of use of the system as a moist wound healing cascade makes it applicable to both in-home and in-facility environments that is not offered through traditional instillation negative pressure systems. In one form, the fluid delivery conduit is used as part of a dual-conduit approach in order to also help promote the removal of drainage, waste, irrigation overflow or other fluid from the wound. Utilization of such a pored, closed-ended delivery conduit in conjunction with a separate drainage conduit infusing helps reduce the frequency of dressing changes as well as the likelihood of microorganism formation and colonization.

Disclosed embodiments relate to wound therapy apparatuses and methods for use in negative pressure wound therapy (NPWT). Such wound therapy apparatuses and methods may reduce maceration during NPWT. The wound therapy apparatus may include a porous hydrophobic layer surrounded by a hydrophilic ring. The hydrophilic ring may serve to prevent passage of liquid while negative pressure is applied to the wound, but allow liquid passage to an absorbent ring when negative pressure is no longer applied. A transmission layer may also be included, underlying the absorbent layer.

In some examples, a dressing assembly suitable for treating a tissue site may include a dressing bolster, a sealing skin, and a gasket member. The sealing skin may cover at least a portion of a first side of the dressing bolster while an opposing second side of the dressing bolster may be configured to be positioned in fluid communication with the tissue site. The gasket member may be configured to create a sealed space between the sealing skin and the tissue site. In some examples, the sealing skin may be liquid impermeable and integrally formed with the dressing bolster. Further, in some examples, the dressing bolster may have a contoured shape including a tissue housing. Other systems, dressings, apparatuses, and methods are disclosed.

In some embodiments, a negative pressure wound closure system and methods for using such a system are described. Certain disclosed embodiments facilitate closure of the wound by preferentially contracting to exert force on the tissue. Some embodiments may utilize a collapsible structure with a plurality of cells.

Apparatus and methods to treat skin defects include a pump with reservoirs for a pressurization gas and a fluid. Upon activation, the pump generates a gas introduced into the gas reservoir, a movable wall of which displaces a movable wall of a fluid source, thus dispensing the fluid into the dressing to spread throughout irrespective of orientation of the dressing, maintaining a transport fluid (e.g. carrier) in the dressing and in contact with a skin defect being treated. The dressing may have a distribution network, and multiple members, dispensing the fluid into the dressing and in contact with a skin defect being treated.

Disclosed herein are embodiments of a wound treatment apparatus with electronic components integrated within a wound dressing. In some embodiments, a wound dressing apparatus can comprise a wound contact layer, an absorbent layer over the wound contact layer, the absorbent layer comprising one or more apertures, a cover layer configured to cover and form a seal over the wound contact layer and the absorbent layer, and an electronics assembly comprising a negative pressure source. The cover layer can be configured to be compressed within the aperture in the absorbent layer when negative pressure is applied to the wound dressing apparatus and indicate a level of negative pressure below the cover layer. In some embodiments, the wound dressing apparatus can comprise an indicator material layer configured to protrude when negative pressure is applied to the wound dressing apparatus and indicate a level of negative pressure below the cover layer.

A dressing for treating a tissue site, particularly an abdominal or peritoneal site, is disclosed. In some embodiments, the dressing may comprise a tissue interface formed from a first layer of a liquid-impermeable material and a plurality of manifolding bubbles formed as part of the first layer. In some embodiments, the tissue interface may further comprise a second layer of a liquid-impermeable material, where the manifolding bubbles are formed as closed cells between the first layer and the second layer. The tissue interface may also include a third layer of liquid-impermeable material positioned adjacent to the second layer, where one or more fluid passageways may be formed between the second layer and third layer for delivering a therapeutic fluid to the tissue site.

A negative pressure device for applying to skin is configured to define a sealed enclosed three-dimensional space when at least a portion of the device is sealed against the skin. The device includes a body including at least one expandable segment that is configured to expand after the device has been sealed against the skin.

Dressings for treating a tissue site with negative pressure are disclosed, which may include a dressing having multiple layers and incorporating a material adapted to neutralize proteolytic enzymes. In one example embodiment, a dressing may include a first layer comprising a hydrophobic gel having a plurality of apertures. A material adapted to neutralize proteolytic enzymes may be applied to a surface of the first layer. The dressing may further include a second layer comprising a fenestrated film and coupled to the first layer. Additionally, the dressing may include a third layer comprising a manifold, which in some instances may be a polymeric foam. The dressing may further include a fourth layer comprising a polymer drape.