Provided are buffered adhesive compositions comprising a high molecular weight non-neutralized polymeric acid and a high molecular weight partially neutralized polymeric acid and products such as wound dressings and ostomy skin barriers incorporating the compositions.

A composite wound dressing apparatus promotes healing of a wound via the use of a micropump system housed within or above a wound dressing member. The micropump system includes a miniature pump that applies a subatmospheric pressure to the wound to effectively draw wound fluid or exudate away from the wound bed without the need for a cumbersome external vacuum source. Hence, the wound dressing and micropump system is portable which allows the patient mobility that is unavailable when an external vacuum source is used. The patient does not need to be constrained for any period of time while exudate is being removed from the wound.

Systems, assemblies, and methods for providing negative-pressure therapy to a tissue site are described. The system can include an absorbent and a sealing layer configured to cover the absorbent. The system can also include a blister fluidly coupled to the absorbent. The blister may have a collapsed position and an expanded position. A first check valve may be fluidly coupled to the absorbent and the blister and configured to prevent fluid flow from the blister into the absorbent if the blister is moved from the expanded position to the collapsed position. A second check valve may be fluidly coupled to the blister and the ambient environment and configured to prevent fluid flow from the ambient environment into the blister if the blister is moved from the collapsed position to the expanded position.

A medical dressing having a geometrical plane of symmetry. A border portion extends along the contour of the pad. A central portion of the dressing has a smaller width perpendicular to the plane of symmetry than the widths of the adjoining portions. The medical dressing comprises a gripping tab which is coplanar with the border portion and which projects outwardly from the border portion. The medical dressing may be used for pressure ulcer prevention, such as at a heel of a human body.

Provided are buffered adhesive compositions comprising a high molecular weight non-neutralized polymeric acid and a high molecular weight partially neutralized polymeric acid and products such as wound dressings and ostomy skin barriers incorporating the compositions.

Wound dressings including a skin contact layer and a cover layer removably adhered to the top surface of the skin contact layer are described. The skin contact layer includes a lower substrate extending around a central aperture and a lower adhesive. The lower substrate includes a top surface and a bottom surface opposite the top surface. The lower adhesive is disposed on the bottom surface of the lower substrate. The cover layer substantially covers the central aperture of the lower substrate, and includes an upper substrate and a backing layer. An upper adhesive is positioned between the top surface of the lower substrate and a bottom surface of the backing layer. In embodiments, the cover layer can be removed and changed while the skin contact layer remains adhered to the skin around a wound.

The present invention relates to wound dressings which are particularly useful (but not necessarily exclusively) on moderate to heavily exuding wounds comprising: an absorbent pad having a first major face comprised of absorbent material and configured for wound contact, and a second major face opposed to the first major face; and a backing layer bonded to the second major face of the pad; wherein the pad and the backing layer are sized such that the backing layer extends beyond the periphery of the pad, thereby defining a margin; wherein the margin of the backing layer is provided with a first adhesive for adhering the backing layer to skin; and wherein a layer of second, low trauma adhesive is provided on, and in direct contact with, the first major face of the pad for adhering the pad to a wound, said layer of second, low trauma adhesive being configured to allow passage of exudate from the wound to the absorbent pad.

A dressing for treating a tissue site, particularly a peritoneal or abdominal site, is disclosed. The dressing may comprise: a substrate; an adherent layer coupled to a surface of the substrate; and a fibrous layer comprising fibers coupled to a surface of the adherent layer opposite the substrate. Typically, the fibrous layer satisfies one or more of the following: at least 75% of the fibers are coupled approximately perpendicular to the surface of the substrate; at least 95% of the fibers in the fibrous layer have a length to diameter aspect ratio from about 10 to about 1000; and no more than 10% of the fibers are coupled approximately tangential to the surface of the substrate. Optionally, the fibrous layer may be formed by a flocking process. Methods of treating various tissue sites using the dressings and negative-pressure therapy are also disclosed.

A method for detecting a state of a dressing includes measuring air pressure within a tube. The tube provides airflow between a pump device and the dressing. The method also includes determining whether the air pressure differs from a pressure setpoint by more than a preset limit, and running the pump to cause the air pressure to approach the pressure setpoint. In response to a determination that the air pressure does not differ from the pressure setpoint by more than the preset limit, the method also includes determining a duration of time since a last running of the pump, determining whether the duration of time since the last running of the pump exceeds a threshold duration, and, in response to a determination that the duration of time since the last running of the pump exceeds the threshold duration, generating an alert that indicates that the dressing is full.

Provided are buffered adhesive compositions comprising a high molecular weight non-neutralized polymeric acid and a high molecular weight partially neutralized polymeric acid and products such as wound dressings and ostomy skin barriers incorporating the compositions.