A system can include excitation pads that can apply an excitation signal to tissue of a patient. The excitation pads can be connected to an electronic circuit that communicates the excitation signal to the excitation pads. The system can include a measurement sensor that can measure voltage of the tissue. The system can include a controller that can determine impedance of the tissue. The controller can be in communication with the excitation pads, the electronic circuit, and the measurement sensor. The controller can generate the excitation signal. The controller can obtain a current measurement of the excitation signal after it has been communicated through at least a portion of the electronic circuit. The current measurement can correspond to the excitation signal before it is applied to the tissue. The controller can determine impedance of the tissue based on the voltage measurement and the current measurement of the excitation signal.

A negative pressure treatment arrangement comprising a multi-layered drainage film, wherein a drainage space is formed between two layers of the drainage film, a first film layer on the wound side delimiting the drainage space comprising a first opening arrangement facilitating the admission of fluids or gases to the drainage space and a second film layer facing away from the wound that also delimits the drainage space comprising a second opening arrangement designed to discharge fluids and/or gases from the drainage space, and also comprising a fluid-tight fixing film that can be used to fix the drainage film to the skin surrounding a wound and to cover at least one area of the second opening arrangement.

Devices and methods herein remove water from human or animal biological waste fluids using one or more forward osmosis filters. The devices allow for the volume of liquid or semi-liquid waste, including potentially infectious liquid waste, to be filtered to reduce potential exposure of healthcare staff to infectious liquid waste. On a hospital, healthcare staff, or individual patient basis, removing water and concentrating the waste can reduce challenges in management and disposal of the waste. Devices herein use forward osmosis to manage and filter, using one or more suitably sized filter(s), biological fluid exudate from wounds. The devices can be constructed to transport water present in the exudate away from a wound. The wound treatment devices herein not only allow for fluid from wounds to be filtered but also provide structures that can protect wounds from external contaminants, including bacteria and viruses. The wound treatment devices can be incorporated into negative pressure wound therapy systems, if desired.

A system and apparatus for promoting perfusion at a tissue site containing a sprain by applying a vacuum to intact skin extending over or surrounding the tissue site. The system and apparatus comprise a manifold formed from a porous material and configured to be disposed proximate the intact skin for distributing vacuum to the intact skin, and a sleeve adapted to cover the manifold and form a chamber containing the manifold to seal the manifold within the chamber between the sleeve and the intact skin. The system and apparatus further comprise a fluid coupling member adapted to deliver vacuum to the manifold for distribution to the intact skin. A method for applying vacuum to the intact skin of a tissue site is also disclosed and described herein.

Dressings, systems and methods of treating a tissue site are described. A method of manufacturing the dressing can include providing a dressing material. The dressing material can have a surface configured to contact the tissue site. The dressing material can also have a plurality of pores. The method can further include applying a compressive force to the dressing material at an angle to the surface, the compressive force causing permanent deformation of the plurality of pores. Causing permanent deformation of the plurality of pores can comprise forming a plurality of compressed pores. Forming a plurality of compressed pores can include compressing the plurality of pores from a generally circular shape to a generally ovular shape.

A curable composition apportioned between at least one Part A and at least one Part B, the Parts sealed within barrier means preventing contamination, the at least one Part A comprising: (i) one or more alkenyl-group containing prepolymers having at least one alkenyl group or moiety per molecule, and the at least one Part B comprising: (ii) one or more SiH-containing prepolymers having at least one Si—H unit per molecule; the composition additionally comprising: (iii) a catalyst for curing by addition of alkenyl-containing prepolymer (i) to SiH-containing prepolymer (ii), wherein prepolymer (ii) is substantially absent from Part A and prepolymer (i) is substantially absent from Part B, methods for preparing the composition, methods for sterilisation thereof, medical and non-medical use thereof, a device incorporating the composition, and a precursor therefor including its sterilisable precursor composition, in particular a terminally sterilisable or terminally sterile composition for medical use, particularly in wound therapy, more particularly as a wound packing material which can be shaped and configured to the shape of a wound, most particularly for application in negative pressure wound therapy (NPWT).

A dressing for negative pressure wound therapy includes an absorbent layer comprising a gelling absorbent material for absorbing exudate, a peripheral adhesive skin contact layer comprising a hydrocolloid adhesive and defining a window through which the absorbent layer is able to contact a wound, and a cover layer that is water impermeable and air permeable. The cover layer defines an aperture to be used with a pump assembly to provide negative pressure to a wound site.

A negative pressure wound dressing for use with breast incisions. The wound dressing includes a drape layer, a manifold layer, a base layer, and a reduced pressure interface. The drape layer has a first surface and a second, wound-facing, surface. The drape layer is substantially impermeable to liquid and substantially permeable to vapor. The manifold layer has a first surface and a second, wound-facing surface. The manifold layer has a perimeter defined by a first convex curved side surface defining a first lobe, a second convex curved side surface defining a second lobe, and a connecting portion between the first lobe and the second lobe. The base layer is configured to: (i) couple the drape layer to the manifold layer, and (ii) the dressing to a patient's tissue. The reduced pressure interface is integrated with the drape layer.

Methods and systems are provided for a sub-atmospheric wound-care (SAWS) system for treating an open wound. The SAWS system includes a regulated vacuum source for developing a negative pressure, a flow rate meter configured to measure a flow rate of liquid removed from the wound, a primary pressure regulating sensor located proximate the wound for directly measuring the negative pressure at the wound, a backup pressure regulating sensor located vacuum tube, a porous dressing suitable to be sealed airtight which is positioned within a wound interface chamber, a collection canister configured to collect said liquid removed from the wound, and an adapter configured to use wall suction a primary regulated vacuum source.

A decompression wrap includes an occlusive layer formed as a first strip having a longitudinal axis, a manifold layer coupled to the occlusive layer and formed as a second strip extending parallel to the longitudinal axis. The occlusive layer extends beyond the manifold layer in a first lateral direction perpendicular to the longitudinal axis. The decompression wrap also includes an adhesive provided on the occlusive layer and configured to seal a first longitudinal section of the occlusive layer to a second longitudinal section of the occlusive layer when the decompression wrap is wrapped around a tissue site.