The dressing on the wound

 

The invention relates to medicine and for the establishment of wound dressings, absorbent excess liquid oozing from the wound. The dressing on the wound contains a layer of hydrophilic foam material, covered on one side with permeable to the liquid layer of sticky substance, and the layer of foam material on the opposite side with respect to the adhesive coating is a layer of absorbent material comprising one or more absorbent bodies of fibrous material, and a layer of absorbent material can drain layer of foamed material under the action of capillary forces, and this armband provides a means to ensure contact between the layer of absorbent material and a layer of foamed material, when this layer of hydrophilic foam material has a thickness of at most 2 mm and an average pore size of 300-500 μm. Adhesive coating, incorporated into an armband, is preferably made of soft, sticky hydrophobic elastomer. Offer armband allows you to replace the absorbent elements, without affecting the layers of bandages, directly adjacent to the wound to reduce the risk of maceration of the skin near the wound. 1 C.p. f-crystals, 2 Il.

Background of invention

On moist wounds or sores usually applied dressings that contain a lining that absorbs excess liquid oozing from the wound. Liquid or poloidal absorbed by the gasket extends sideways on the strip and can reach the skin, which is located on the edges of the wound and which in this case may come into contact with the liquid. This contact with the fluid potentially harmful to the skin, as it can lead to maceration of the skin or damage in any other way. This is a very common complication in the treatment of chronic wounds and ulcers.

Another problem is that replacing the bandages will often have an adverse effect on the healing process.

The present invention is the creation of a bandage on the wound, which reduces the risk of maceration of the skin and in which the portion of the strip, which is located near the wound remains free of liquid up until the pad is saturated. Another object of the invention is the creation of a two-layer bandage on the wound, which has drained the first layer of hydrophilic in which the long period of time, then as the second layer, the purpose of which is the drain of the first layer, can be replaced at regular intervals of time.

The invention

These problems are solved by creating a bandage on the wound, which contains a layer of hydrophilic foam material, covered on one side with a layer permeable to liquid adhesives, and the bandage is different in that the layer of foamed material on the opposite side with respect to the adhesive coating is a layer of absorbent, able to drain the layer of foamed material by capillary action, and the fact that the bandage includes a tool to ensure good contact between the absorbent layer and a layer of foamed material. Under the action of capillary forces in the layer of absorbent material is a release layer of foamed material from the liquid, thereby essentially eliminates the risk of maceration of the skin. This gives you the opportunity to leave a layer of foamed material on the bed of the wound for a longer period of time without the need for its replacement.

In one preferred variant of embodiment of the invention the layer of hydrophilic foam material has a maximum thickness of 2 mm and the average size applies a bandage to the wound, designed to interact with the absorbent body, the bandage is different in that it has a layer of hydrophilic foam material, which on one side has an adhesive coating on its entire surface, without clogging or not clogging the pores of the specified layer, while the layer has a thickness of at most 2 mm and an average pore size of 300-500 μm.

Brief description of drawings

Now the invention will be described with reference to the accompanying drawings, in which:

Fig.1 is a schematic perspective view of part of a dressing for a wound according to the first variant embodiment of the invention,

Fig.1A shows in larger scale a portion of the bandage of Fig.1,

Fig.2 is obtained with an electron microscope picture of the porous structure of the absorbent foam material introduced into the dressing on the wound of Fig.1.

Description of the preferred embodiment variants of the invention

The dressing on the wound, as shown in Fig.1 includes gasket 1 on the wound, which contains two layers 2, 3. The bottom layer 3 consists of a hydrophilic polyurethane foam with open pores. The lower side of the layer of foamed material, which when wearing headbands facing the wound, provided with a coating 4 of a soft, sticky hydrophobic elastomeric material, what part of the walls of the open pores 5 of foamed material, which opened to the gel-coated side will be covered with gel. Because the layer 3 gel does not close the pores, and only covers part of the walls of some of the pores of the foam material facing the wound, excess liquid wound exudate is drawn in the foam material and is absorbed in it. The method of formation of such a layer of the gel described in WO 97742985 A1, to which reference is made for a better understanding of the method of manufacture. The top layer 2 consists of an absorbent material, which is able to drain the bottom layer 3, in other words, the capillary forces in the upper material will be greater than the capillary force in the lower layer. When the top layer will consist of a foamed material, the pores in the top layer will be smaller than the pores in the lower layer. When the top layer will consist of fibrous material, the capillaries in this material can be so narrow that capillary forces will be more in this layer than in the lower layer. The size of the capillaries of the fibrous material is usually possible to decrease the compression, and, therefore, relatively easy to manufacture fibrous material, which can drain layer 3 of foamed material.

Layer 2 is the Rial.

When this bandage will be placed on a moist wound or ulcer, excessive fluid or exudate will otkazyvatsa in layer 3. When the exudate, sucked in layer 3 will come into contact with the upper layer 2, it before will be able to some appreciable degree of spread in the layer 3, will move through the layer 3 and be absorbed in the layer 2 due to the fact that the capillary forces acting in the layer 2, is greater than the capillary forces acting in the layer 3. Therefore, the fluid discharged from the wound, will not be absorbed in the lower layer 3 and the upper layer 2 up until the layer becomes saturated. This essentially eliminates the risk of prolonged contact of the liquid wounds with skin on the edges of the wound, causing, for example, maceration of the skin. However, the bottom layer 3 will still be wet, maintaining the desired moist wound environment. The bottom layer 3 will not be filled with liquid up until the top layer becomes saturated. Therefore, the upper layer is preferably made of such size to accommodate all or at least part of the liquid to be absorbed by the bandage, so that the lower layer can be drained during the full service life of the dressing. Therefore, n the time is sufficient to ensure quick entry of exudate in contact with the upper drainage layer 2. The bottom layer 3 preferably will have a thickness of between 1-2 mm

Layers 2 and 3 held together by some suitable means, for example through support bandages, elastic tape or band-aid, for example, for fastening on the part of the user's body where the wound. In order to capillary forces in the upper layer 2 acted properly, it is important to ensure effective contact between the layers 2 and 3 and preferably apply a supporting bandage so that only a small force to press the layer 2 to layer 3.

The lower layer is preferably made of a foam material of the type currently used in dressings, for example, of polyurethane foamAmrel L-6production companyReinel, USA. Capillary forces such foam material is so small that such a layer will be able to drain a fibrous absorbent body of all types, currently used in the treatment of wounds. In Fig.2 shows the obtained electron microscope picture of the porous structure of one such material.

Layer 3 of foamed material is very flexible and Bunia. Therefore, these layers are particularly suitable for use on large surface wounds and can remain on the wound during the entire term of its healing. Absorbent body, consisting of fibrous material, are less flexible than the absorbent body of foamed material, and therefore may require the use of gel-coated layer according to the invention, which covers a large wound several mutually adjacent absorbent bodies of fibrous material to ensure that the two layers of the bandage according to the invention are in effective contact with each other over the entire area of the wound.

It is clear that the scope of the invention described can be modified in several ways, in particular in respect of the material used in the bandage. For example, a layer of foam may consist of other foams, for example, viscous foam, foam, of a copolymer of ethylene and vinyl acetate, silicone foams, which can be made hydrophilic. In addition, you can use other absorbent fibrous materials, the fibrous body may be formed with different pore sizes by an appropriate compression text-align:center; margin-top:2mm;">Claims

1. Bandage (1) on the wound containing layer (3) hydrophilic foam material, covered on one side with permeable to the liquid layer (4) adhesive material, characterized in that the layer (3) of foamed material on the opposite side with respect to the adhesive coating (4) is a layer (2) of absorbent material consisting of one or more absorbent bodies of fibrous material, and a layer (2) of absorbent material capable of draining layer of foamed material under the action of capillary forces, with this armband provides a means to ensure contact between the layer of absorbent material and a layer of foamed material, with a layer of hydrophilic foam material has a thickness of at most 2 mm and an average pore size of 300-500 μm.

2. The dressing on the wound under item 1, characterized in that the adhesive coating consists of a soft sticky hydrophobic elastomer.

 

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5 cl, 2 dwg

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