Wound dressing

a wound and dressing technology, applied in the field of wound dressings, can solve the problems of traumatic dressing change, loss of fatty substances to the wound environment, the loss of fatty substances to the wound handling tools (such as gloves), and to the wound and the wound environment, and achieve the effect of improving tissue compatibility

Inactive Publication Date: 2012-11-22
LOHMANN & RAUSCHER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0025]According to the invention, this object is achieved by a refinement of the known wound dressings, characterized essentially in that the wound contact layer contains an elastomer matrix comprising

Problems solved by technology

This product, which is formed from a woven cotton impregnated with a fatty substance based on petroleum jelly, nevertheless has disadvantages such as loss of fatty substances to the handling tools (such as gloves) and to the wound and the wound environment.
This phenomenon often results in the backing being exposed and coming in direct contact with the wound.
If the backing sticks to the wound, this often leads to traumatic changing of the dressing and a disturbance in the wound healing process.
Other commercially available products, e.g., the dressing from Johnson & Johnson ADAPTIC, which is a knit viscose material impregnated with an oil-in-water emulsion, or the product JELONET (Smith & Nephew), which is cotton gauze impregnated with paraffin, fulfill the same purpose as LOMATUELL H but also have properties that are a disadvantage with respect to the loss of fatty substances.
Furthermore, it seems that the known dressings of the fat-impregnated tulle type are too hydrophobic during use and facilitate an unwanted drying of the wound.
When these agents are used, it has proven problematical that the absorbent (superabsorber) in the dressing binds liquid in a gel form.
Under some circumstances, this may cause maceration of the wound.
This is problematical in view of the desired avoidance of direct contact between the elastomer and the wound.
Furthermore, the use of surfactants is not without problems because they have a certain cytotoxic potential.
Wound infections

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0058]

Amount (g)Parts by weight (%)Paraffin oil111072.2Copolymer402.6Antioxidant1.50.1Petroleum jelly15410.0CMC23115.0

[0059]The composition is prepared in a laboratory dissolver. 1110 g of the paraffin oil is placed in the dissolver and mixed with 40 g of an elastomer copolymer SEEPS (Septon 4055, Kuraray) and 1.5 g of an antioxidant (Irganox 1010) and stirred at approximately 135° C. until obtaining a clear homogeneous elastomer composition. After incorporating 154 g petroleum jelly (Vara AB, Sasol) 231 g of the sodium carboxymethyl cellulose (CMC, Blanose 7H4XF, Aqualon) is added. The resulting elastomer composition is stirred for 30 minutes more until obtaining a homogeneous composition.

[0060]The composition may also be prepared in a kneader or similar installations / equipment known in general for processing hot melt compositions.

[0061]The composition can be applied to the fabric (mesh tulle) in an immersion bath at approximately 140-145° C., so that the textile structure is compl...

example 2

[0062]Like example 1, except that a polymer mixture of 2% Septon 4055 and 0.6% Septon 4077 was used.

example 3

[0063]Like example 1, except that 15% of a nonionic cellulose derivative (HPMC, Bonucel D15000) was used.

[0064]Within the scope of the invention, it may be of particular importance for the wound dressings to absorb only in the range of 5% to 30% of the dry weight. This limits gelation and swelling (due to hydrocolloid solutions), so that the transport of exudate through the openings in the dressing and into the secondary dressing is not hindered.

[0065]Within the scope of the invention, the aspect wherein the backing has an open mesh so that an exudate flow can be ensured even after the fibers forming the backing have been coated / sheathed with the elastomer composition.

[0066]The invention is not limited to the exemplary embodiments described above. Instead, another idea involves the use of backing materials in the form of open mesh knits and woven fabrics and / or polyurethane foams, such as Vivo MCF 03 (AMS). The wound dressing according to the invention may also contain an additional...

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Abstract

The invention relates to a sterile wound dressing having a backing and a nonabsorbent elastomer wound contact layer, wherein the elastomer matrix is formed by a synthetic three-block elastomer, preferably a copolymer of polystyrene block and polyolefin block (SEPS, SEBS, SEEPS, etc.) or mixtures thereof, wherein the total polymer content is less than 3.2 wt %, in particular 3.0 wt % or less, preferably 2.6 wt % or less, and is plasticized by an apolar oil and/or petroleum jelly.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based on and claims priority to European Patent Application No. 11 004 167.0, filed on May 19, 2011, which is incorporated herein by reference in its entirety.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not applicable.BACKGROUND OF THE INVENTION[0003]The invention relates to a sterile wound dressing with a backing and an elastomeric polymer matrix as the wound contact layer.[0004]Wound dressings containing fat have been used successfully for many years for topical treatment of traumatic wounds such as cuts and scrapes and chronic wounds, such as decubital ulcers, leg ulcers, and the like, as well as burns on humans and animals.[0005]LOMATUELL H from the company Lohmann & Rauscher GmbH & Co. KG (“L&R”) is tulle impregnated with fat and is one of the products often used for medical care of skin wounds. This product, which is formed from a woven cotton impregnated with a fatty substance based on p...

Claims

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Application Information

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IPC IPC(8): A61L15/24A61F13/02A61P17/02A61K31/444A61K31/155
CPCA61L15/225A61L15/24A61L15/44A61L15/60A61F13/00017A61L15/34A61L15/28A61F2013/00519C08L53/02A61F13/0253A61F13/0273A61F2013/00748A61K31/155B32B27/18B32B27/32B32B2535/00A61P17/02
Inventor GORKA, MARIUS-THOMAS
Owner LOHMANN & RAUSCHER
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