Devices and methods for encapsulating a portion of a wound dressing with a coating are disclosed. In some embodiments, a method can comprise positioning a substantially flexible wound contact layer of the wound dressing on a perforated plate. The wound contact layer can include a first side supporting a plurality of electronic components protruding from a surface of the first side and a second side opposite the first side. The second side can be substantially smooth. The method can further comprise applying a vacuum to the wound contact layer through perforations in the perforated plate to hold the wound contact layer against the perforated plate and coating the wound contact layer with a coating.

An assembly for coupling a dressing to a tube connected to a pump includes a hydrophobic film layer comprising a perforation extending therethrough, an indicator coupled to a first side of the hydrophobic film layer and positioned proximate the perforation, a felted foam layer coupled to a second side of the hydrophobic film layer and fluidly communicable with the indicator via the perforation, and a connection pad coupled to the first side of the hydrophobic film layer and coupleable to the tube.

A wound dressing, a method of manufacturing a wound dressing, and a method of treating a patient are disclosed. The wound dressing may include an absorbent layer for absorbing wound exudate; and an obscuring element for at least partially obscuring a view of wound exudate absorbed by the absorbent layer in use.

Methods of manufacturing a wound monitoring and/or therapy apparatus and/or wound dressing include positioning electronic components and connections in regions of a substrate that are not configured to be perforated. The methods can also include following a set of rules for positioning the components as well as positioning and shaping the connections based on the constraints stemming from, among other things, the positioning of the perforations on the substrate and with the goal of maintaining acceptable levels of signal integrity. The methods further include manufacturing a multi-layered substrate. Wound monitoring and/or therapy apparatus manufactured using such methods are also disclosed.

A system or apparatus including a dressing, a dressing interface, and a humidity sensor may be suitable for use with systems and methods for treating a tissue site. Embodiments of the apparatus are provided for treating a tissue site with reduced pressure provided by a source of reduced pressure. The dressing may include abase layer, a sealing member disposed proximate the base layer to define an enclosure providing a sealed space over the tissue site, and an absorbent member disposed within the enclosure. The dressing interface may comprise a reduced-pressure port configured to be coupled to the source of reduced pressure and a therapy port covered by a hydrophobic filter defining a reduced-pressure pathway between the hydrophobic filter and the source of reduced pressure. The humidity sensor may comprise a sensing portion fluidly coupled to the reduced-pressure pathway and an output for providing a humidity signal that indicates the amount of fluid extracted from the tissue site and stored by the absorbent member. Other dressings, systems, and methods are disclosed.

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.

Devices, apparatuses, methods, and computer program products are provided for hemorrhage detection. An example sensing device for hemorrhage detection includes a blood detection layer that includes a permeable film and one or more optical fibers supported by the permeable film. The device also includes an optical sensor that includes a light source that emits light and an optical receiver in optical communication with the light source via the one or more optical fibers. The optical receiver generates optical data responsive to the light emitted by the light source and received by the optical receiver via the one or more optical fibers indicative of at least a wavelength of the light. The device further includes a controller operably coupled with the optical sensor that receives the optical data generated by the optical receiver in response to the emitted light and determines an amount of blood based upon the optical data.

In some cases, a wound dressing includes a substantially flexible substrate with a first, wound-facing side supporting a plurality of electronic components and a second side opposite the first side, a wicking layer in contact with the second side of the substrate, the wicking layer configured to facilitate passage of fluid, a substantially non-stretchable coating applied to at least some of the plurality of electronic components, a substantially stretchable coating applied to the first side of the substrate, the stretchable coating applied over the substantially non-stretchable coating, a wound contact layer in contact with the stretchable coating, the wound contact layer configured to adhere to a wound, and a protective layer applied to the wound contact layer, the protective layer configured to be removed to expose the wound contact layer. In some cases, a method of manufacturing the wound dressing.

Wound therapy dressings are provided. The wound therapy dressings may include at least one selectively transparent layer with a refractive index in a range wherein interaction between the selectively transparent layer and fluids from a treatment site switches the selectively transparent layer from a first, opaque state to a second, transparent state. Dressings that include multiple layers may include polymer films with a plurality of fluid restrictions, a manifold, a transparent polymer drape, and a hydrophobic polymer layer. The dressings may further include negative pressure therapy treatment input devices. A method of use wherein the dressings are used to monitor fluid flow, exudate, and maceration around a treatment site is also provided.

An absorbent structure, including a sensor system, can sense and measure the level of wetness contained within the absorbent structure as well as sense and measure environmental conditions. The sensor system may include passive RFID sensors or tags, RFID readers, antenna, a tuning module, a processing module, a memory module and a wireless communication module. The absorbent structure may further include two or more sensors, with a first sensor placed in a first area most likely to first be exposed to liquid and a second sensor spaced apart from the first sensor in an area likely to be exposed to liquid only after the absorbent structure has become more saturated.