US 20080306456 A1
The invention relates to a wound treatment device (100) with at least one elastically deformable vacuum-generating element which can be actuated directly by hand and which is arranged on and connected directly to a film-like wound-covering element (2) that covers the wound chamber (1). The vacuum-generating element is a hollow body (4.1) whose cavity (7), in the state with the device applied to the patient's body, communicates directly with the wound chamber (1) via an opening (3) formed on the wound-covering element (2). At least one absorption body (5) that absorbs the wound secretions is positioned in the wound chamber (1) and is surrounded by a finely porous sleeve (6) that is permeable to liquid. The hollow body (4.1) is provided with at least one valve (12).
1. A wound treatment device having at least one elastically deformable vacuum producing element, which can be operated directly by hand, arranged on a film-like wound cover element, which is adapted to cover a wound cavity in a patient's body, and which is adapted to be connected to the patient's body tubelessly, wherein the vacuum producing element is a hollow body having a cavity that is adapted to communicate with the wound cavity via an opening worked into the wound cover element when the wound cover element is placed on the patient's body, and wherein the wound treatment device further comprises at least one absorption body that is adapted to be placed in the wound cavity to absorb wound secretions, the absorption body being surrounded by a fine-pore, liquid-permeable envelope.
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The invention concerns a wound treatment device with at least one elastically deformable vacuum producing element, which can be operated directly by hand, being arranged on a film-like wound cover element, covering the particular wound cavity, and being connected to the latter tubelessly.
A wound treatment device of the above mentioned kind is found in DE 198 44 355 A1. The vacuum producing element shown in
The problem of the invention is to design an improved wound treatment device with vacuum producing element, integrated with the wound cover film, wherein the precompressed filling can be done away with.
This problem is solved by a wound treatment device of this kind, wherein
The aim is to achieve a new kind of wound treatment device, in which the wound exudate is taken up by the absorption body, while at the same time the suction function is supported by a simplified vacuum system which can be activated by hand. The absorption body can be a sheetlike shape, whose final volume increases greatly in the course of the absorption process, without exerting a noteworthy pressure on the wound surface. However, if a pressure is to be exerted on the wound, one can at least resort to an additional absorption body, encased or not, which can be placed directly on the wound surface, i.e., underneath the mentioned flat absorption body. The additional absorption body can also take on the function of a trapping layer for the coarse, clumplike secretions. The absorption body can be placed dry or slightly premoistened on the wound surface.
The additional absorption body can be a perforated pouch containing absorbent particles, a shaped piece of foam plastic or fleece, possible with superabsorbent particles. Superabsorbing foam plastic beads can be poured into the pouch.
The encased absorption body can be one which is interspersed with superabsorbents. The envelope can have pores whose size does not greatly exceed that of the superabsorbing particles. In this way, the wound secretions sucked up remain inside the envelope until the absorption body is removed from the wound and help improve the climate of the wound space, i.e., maintain the moist surroundings. The wound exudate does not necessarily have to be taken away through an additional conduit, unless there is an excess of wound exudate.
The absorption body can be made from various medically safe materials, such as open-cell foam plastic, gel or textile. Preferably, it consists of at least one layer of a fleecelike textile material containing cellulose and having superabsorbent particles, which is easy to work and make ready. The absorption body can consist of or contain alginate fibers. It is expressly pointed out that the absorption body (or bodies) placed in the wound cavity or in the cavity of the hollow body is (are) not precompressed.
Finally, the shaped absorbing piece or the pouch with absorber particles contained therein can be placed directly on the wound, without having to use the mentioned encased sheetlike absorption body.
In order to kill germs, the encased absorption body and/or the additional absorption body of fleece or foam plastic or an antiadhesive film element which can be placed directly on the wound can be provided with substances containing silver or copper, for example, in nanocrystalline form. As the antiadhesive film element, one can use a perforated so-called wound spacer grid, which is arranged between the wound surface and the absorption body. Substances containing zinc are also possible, and can support the wound healing process.
Furthermore, the absorption body can contain carboxymethylcellulose, natural or synthetic hyaluronic acid, honey and/or its derivatives, propolis and/or pharmaceutically active plant extracts, such as Aloe vera.
The compressible hollow body can have any desired external shape, provided that it is connected tubelessly to the wound cover element and sits stable thereupon. The hollow body can have the shape of a prism, such as a cuboid. Preferably, the hollow body is configured as an elastically deformable solid of revolution, such as one made of elastomer. The hollow solid of revolution can be spherical, cylindrical or conical, but it can also have the shape of a pear or oval cylinder. An especially advantageous configuration of the hollow body is a cuboidal or somewhat cylindrical bellows, which can be deformed essentially only in one direction, say, perpendicular to the emplaced would cover element.
Preferably, the hollow body is joined to a circumferential flat collar, which can be joined to the wound cover element directly or via a cushion ring. The cushion ring can have a flat to round or toroidal cross section. The task of the cushion ring is to gently transfer the pressure on the hollow body when pressed by hand against the patient's skin and to distribute it evenly. The cushion ring can be made from any desired deformable and especially elastomeric material, such as rubber or plastic.
The hollow body can also be designed as a single piece with the wound cover element. This can be the case, in particular, for the smaller sizes of wound cover element. A single-piece configuration can furthermore pertain to a product which is assembled from the hollow body, the wound cover element, and the encased absorption body. Here, “single-piece” refers to a one-part design, e.g., a molded piece.
The wound treatment device can be provided with at least one window arranged on the wound cover element and able to be removed or swiveled, on which the mentioned hollow body sits. In this case, the wound cover element has at least one recess to accommodate the window.
A vacuum indicator can be connected or connectable to the valve, by which the patient himself or the doctor can read off the vacuum level and change it if necessary by activating the hollow body or the valve. The vacuum indicator can be part of an external pump. The vacuum producing element itself, i.e., the hollow body, can take on the supplemental function of a vacuum indicator if it is appropriately scaled. For example, the vacuum indicator can be a scaled glass tube with piston, connected directly to the valve.
With the wound treatment device according to the invention, the following kinds of wounds can be treated:
Some additional selected usage possibilities are listed below:
The benefits of the invention consist, in particular, in that:
Sample embodiments of the invention are explained more closely hereafter by means of the drawing. The figures show:
The hollow body 4.1 is provided with a oneway valve 12, which allows the flow through of air and—if necessary—excess wound secretions, if the hollow body is connected via an additionally provided conduit 19 to a corresponding mechanical or electrical suction device (not shown), in one direction (arrow R). Thus, a return flow from the outside is prevented. Even so, another oneway valve 13 (see
The embodiment per
The hollow body 4.1, as shown in
Optionally, the absorption bodies 5, 9 can contain a quantity of nanoparticles of silver, copper or zinc, which are useful as antibacterial agents.
The embodiment of
All wound treatment devices 100 to 600 described, and their parts, come in sterile packaging.